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TextBox Class

 

Displays a text box control for user input.

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

System.Object
  System.Web.UI.Control
    System.Web.UI.WebControls.WebControl
      System.Web.UI.WebControls.TextBox

<ControlValuePropertyAttribute("Text")>
<ValidationPropertyAttribute("Text")>
Public Class TextBox
	Inherits WebControl
	Implements IPostBackDataHandler, IEditableTextControl, ITextControl
Name Description
System_CAPS_pubmethod TextBox()

Initializes a new instance of the TextBox class.

Name Description
System_CAPS_pubproperty AccessKey

Gets or sets the access key that allows you to quickly navigate to the Web server control.(Inherited from WebControl.)

System_CAPS_protproperty Adapter

Gets the browser-specific adapter for the control.(Inherited from Control.)

System_CAPS_pubproperty AppRelativeTemplateSourceDirectory

Gets or sets the application-relative virtual directory of the Page or UserControl object that contains this control.(Inherited from Control.)

System_CAPS_pubproperty Attributes

Gets the collection of arbitrary attributes (for rendering only) that do not correspond to properties on the control.(Inherited from WebControl.)

System_CAPS_pubproperty AutoCompleteType

Gets or sets a value that indicates the AutoComplete behavior of the TextBox control

System_CAPS_pubproperty AutoPostBack

Gets or sets a value that indicates whether an automatic postback to the server occurs when the TextBox control loses focus.

System_CAPS_pubproperty BackColor

Gets or sets the background color of the Web server control.(Inherited from WebControl.)

System_CAPS_pubproperty BindingContainer

This API supports the product infrastructure and is not intended to be used directly from your code. Gets the control that contains this control's data binding.(Inherited from Control.)

System_CAPS_pubproperty BorderColor

Gets or sets the border color of the Web control.(Inherited from WebControl.)

System_CAPS_pubproperty BorderStyle

Gets or sets the border style of the Web server control.(Inherited from WebControl.)

System_CAPS_pubproperty BorderWidth

Gets or sets the border width of the Web server control.(Inherited from WebControl.)

System_CAPS_pubproperty CausesValidation

Gets or sets a value indicating whether validation is performed when the TextBox control is set to validate when a postback occurs.

System_CAPS_protproperty ChildControlsCreated

Gets a value that indicates whether the server control's child controls have been created.(Inherited from Control.)

System_CAPS_pubproperty ClientID

Gets the control ID for HTML markup that is generated by ASP.NET.(Inherited from Control.)

System_CAPS_pubproperty ClientIDMode

Gets or sets the algorithm that is used to generate the value of the ClientID property.(Inherited from Control.)

System_CAPS_protproperty ClientIDSeparator

Gets a character value representing the separator character used in the ClientID property.(Inherited from Control.)

System_CAPS_pubproperty Columns

Gets or sets the display width of the text box in characters.

System_CAPS_protproperty Context

Gets the HttpContext object associated with the server control for the current Web request.(Inherited from Control.)

System_CAPS_pubproperty Controls

Gets a ControlCollection object that represents the child controls for a specified server control in the UI hierarchy.(Inherited from Control.)

System_CAPS_pubproperty ControlStyle

Gets the style of the Web server control. This property is used primarily by control developers.(Inherited from WebControl.)

System_CAPS_pubproperty ControlStyleCreated

Gets a value indicating whether a Style object has been created for the ControlStyle property. This property is primarily used by control developers.(Inherited from WebControl.)

System_CAPS_pubproperty CssClass

Gets or sets the Cascading Style Sheet (CSS) class rendered by the Web server control on the client.(Inherited from WebControl.)

System_CAPS_pubproperty DataItemContainer

Gets a reference to the naming container if the naming container implements IDataItemContainer.(Inherited from Control.)

System_CAPS_pubproperty DataKeysContainer

Gets a reference to the naming container if the naming container implements IDataKeysControl.(Inherited from Control.)

System_CAPS_protproperty DesignMode

Gets a value indicating whether a control is being used on a design surface.(Inherited from Control.)

System_CAPS_pubproperty Enabled

Gets or sets a value indicating whether the Web server control is enabled.(Inherited from WebControl.)

System_CAPS_pubproperty EnableTheming

Gets or sets a value indicating whether themes apply to this control.(Inherited from WebControl.)

System_CAPS_pubproperty EnableViewState

Gets or sets a value indicating whether the server control persists its view state, and the view state of any child controls it contains, to the requesting client.(Inherited from Control.)

System_CAPS_protproperty Events

Gets a list of event handler delegates for the control. This property is read-only.(Inherited from Control.)

System_CAPS_pubproperty Font

Gets the font properties associated with the Web server control.(Inherited from WebControl.)

System_CAPS_pubproperty ForeColor

Gets or sets the foreground color (typically the color of the text) of the Web server control.(Inherited from WebControl.)

System_CAPS_pubproperty HasAttributes

Gets a value indicating whether the control has attributes set.(Inherited from WebControl.)

System_CAPS_protproperty HasChildViewState

Gets a value indicating whether the current server control's child controls have any saved view-state settings.(Inherited from Control.)

System_CAPS_pubproperty Height

Gets or sets the height of the Web server control.(Inherited from WebControl.)

System_CAPS_pubproperty ID

Gets or sets the programmatic identifier assigned to the server control.(Inherited from Control.)

System_CAPS_protproperty IdSeparator

This API supports the product infrastructure and is not intended to be used directly from your code. Gets the character used to separate control identifiers.(Inherited from Control.)

System_CAPS_protproperty IsChildControlStateCleared

Gets a value indicating whether controls contained within this control have control state.(Inherited from Control.)

System_CAPS_protproperty IsEnabled

Gets a value indicating whether the control is enabled.(Inherited from WebControl.)

System_CAPS_protproperty IsTrackingViewState

Gets a value that indicates whether the server control is saving changes to its view state.(Inherited from Control.)

System_CAPS_protproperty IsViewStateEnabled

Gets a value indicating whether view state is enabled for this control.(Inherited from Control.)

System_CAPS_protproperty LoadViewStateByID

Gets a value indicating whether the control participates in loading its view state by ID instead of index. (Inherited from Control.)

System_CAPS_pubproperty MaxLength

Gets or sets the maximum number of characters allowed in the text box.

System_CAPS_pubproperty NamingContainer

Gets a reference to the server control's naming container, which creates a unique namespace for differentiating between server controls with the same Control.ID property value.(Inherited from Control.)

System_CAPS_pubproperty Page

Gets a reference to the Page instance that contains the server control.(Inherited from Control.)

System_CAPS_pubproperty Parent

Gets a reference to the server control's parent control in the page control hierarchy.(Inherited from Control.)

System_CAPS_pubproperty ReadOnly

Gets or sets a value indicating whether the contents of the TextBox control can be changed.

System_CAPS_pubproperty RenderingCompatibility

Gets a value that specifies the ASP.NET version that rendered HTML will be compatible with.(Inherited from Control.)

System_CAPS_pubproperty Rows

Gets or sets the number of rows displayed in a multiline text box.

System_CAPS_pubproperty Site

Gets information about the container that hosts the current control when rendered on a design surface.(Inherited from Control.)

System_CAPS_pubproperty SkinID

Gets or sets the skin to apply to the control.(Inherited from WebControl.)

System_CAPS_pubproperty Style

Gets a collection of text attributes that will be rendered as a style attribute on the outer tag of the Web server control.(Inherited from WebControl.)

System_CAPS_pubproperty SupportsDisabledAttribute

Gets a value that indicates whether the control should set the disabled attribute of the rendered HTML element to "disabled" when the control's IsEnabled property is false.(Inherited from WebControl.)

System_CAPS_pubproperty TabIndex

Gets or sets the tab index of the Web server control.(Inherited from WebControl.)

System_CAPS_protproperty TagKey

Gets the HTML tag for the text box control. This property is protected.(Overrides WebControl.TagKey.)

System_CAPS_protproperty TagName

Gets the name of the control tag. This property is used primarily by control developers.(Inherited from WebControl.)

System_CAPS_pubproperty TemplateControl

Gets or sets a reference to the template that contains this control. (Inherited from Control.)

System_CAPS_pubproperty TemplateSourceDirectory

Gets the virtual directory of the Page or UserControl that contains the current server control.(Inherited from Control.)

System_CAPS_pubproperty Text

Gets or sets the text content of the TextBox control.

System_CAPS_pubproperty TextMode

Gets or sets the behavior mode (such as, single-line, multiline, or password) of the TextBox control.

System_CAPS_pubproperty ToolTip

Gets or sets the text displayed when the mouse pointer hovers over the Web server control.(Inherited from WebControl.)

System_CAPS_pubproperty UniqueID

Gets the unique, hierarchically qualified identifier for the server control.(Inherited from Control.)

System_CAPS_pubproperty ValidateRequestMode

Gets or sets a value that indicates whether the control checks client input from the browser for potentially dangerous values.(Inherited from Control.)

System_CAPS_pubproperty ValidationGroup

Gets or sets the group of controls for which the TextBox control causes validation when it posts back to the server.

System_CAPS_protproperty ViewState

Gets a dictionary of state information that allows you to save and restore the view state of a server control across multiple requests for the same page.(Inherited from Control.)

System_CAPS_protproperty ViewStateIgnoresCase

Gets a value that indicates whether the StateBag object is case-insensitive.(Inherited from Control.)

System_CAPS_pubproperty ViewStateMode

Gets or sets the view-state mode of this control.(Inherited from Control.)

System_CAPS_pubproperty Visible

Gets or sets a value that indicates whether a server control is rendered as UI on the page.(Inherited from Control.)

System_CAPS_pubproperty Width

Gets or sets the width of the Web server control.(Inherited from WebControl.)

System_CAPS_pubproperty Wrap

Gets or sets a value indicating whether the text content wraps within a multiline text box.

Name Description
System_CAPS_protmethod AddAttributesToRender(HtmlTextWriter)

This API supports the product infrastructure and is not intended to be used directly from your code. Adds HTML attributes and styles that need to be rendered to the specified HtmlTextWriter instance.(Overrides WebControl.AddAttributesToRender(HtmlTextWriter).)

System_CAPS_protmethod AddedControl(Control, Int32)

Called after a child control is added to the Controls collection of the Control object.(Inherited from Control.)

System_CAPS_protmethod AddParsedSubObject(Object)

This API supports the product infrastructure and is not intended to be used directly from your code. Overridden to allow only literal controls to be added as the Text property.(Overrides Control.AddParsedSubObject(Object).)

System_CAPS_pubmethod ApplyStyle(Style)

Copies any nonblank elements of the specified style to the Web control, overwriting any existing style elements of the control. This method is primarily used by control developers.(Inherited from WebControl.)

System_CAPS_pubmethod ApplyStyleSheetSkin(Page)

Applies the style properties defined in the page style sheet to the control.(Inherited from Control.)

System_CAPS_protmethod BeginRenderTracing(TextWriter, Object)

Begins design-time tracing of rendering data.(Inherited from Control.)

System_CAPS_protmethod BuildProfileTree(String, Boolean)

This API supports the product infrastructure and is not intended to be used directly from your code. Gathers information about the server control and delivers it to the Trace property to be displayed when tracing is enabled for the page.(Inherited from Control.)

System_CAPS_protmethod ClearCachedClientID()

This API supports the product infrastructure and is not intended to be used directly from your code. Sets the cached ClientID value to null.(Inherited from Control.)

System_CAPS_protmethod ClearChildControlState()

Deletes the control-state information for the server control's child controls. (Inherited from Control.)

System_CAPS_protmethod ClearChildState()

Deletes the view-state and control-state information for all the server control's child controls.(Inherited from Control.)

System_CAPS_protmethod ClearChildViewState()

Deletes the view-state information for all the server control's child controls.(Inherited from Control.)

System_CAPS_protmethod ClearEffectiveClientIDMode()

This API supports the product infrastructure and is not intended to be used directly from your code. Sets the ClientIDMode property of the current control instance and of any child controls to Inherit.(Inherited from Control.)

System_CAPS_pubmethod CopyBaseAttributes(WebControl)

Copies the properties not encapsulated by the Style object from the specified Web server control to the Web server control that this method is called from. This method is used primarily by control developers.(Inherited from WebControl.)

System_CAPS_protmethod CreateChildControls()

Called by the ASP.NET page framework to notify server controls that use composition-based implementation to create any child controls they contain in preparation for posting back or rendering.(Inherited from Control.)

System_CAPS_protmethod CreateControlCollection()

Creates a new ControlCollection object to hold the child controls (both literal and server) of the server control.(Inherited from Control.)

System_CAPS_protmethod CreateControlStyle()

Creates the style object that is used internally by the WebControl class to implement all style related properties. This method is used primarily by control developers.(Inherited from WebControl.)

System_CAPS_pubmethod DataBind()

Binds a data source to the invoked server control and all its child controls.(Inherited from Control.)

System_CAPS_protmethod DataBind(Boolean)

Binds a data source to the invoked server control and all its child controls with an option to raise the DataBinding event. (Inherited from Control.)

System_CAPS_protmethod DataBindChildren()

Binds a data source to the server control's child controls.(Inherited from Control.)

System_CAPS_pubmethod Dispose()

Enables a server control to perform final clean up before it is released from memory.(Inherited from Control.)

System_CAPS_protmethod EndRenderTracing(TextWriter, Object)

Ends design-time tracing of rendering data.(Inherited from Control.)

System_CAPS_protmethod EnsureChildControls()

Determines whether the server control contains child controls. If it does not, it creates child controls.(Inherited from Control.)

System_CAPS_protmethod EnsureID()

Creates an identifier for controls that do not have an identifier assigned.(Inherited from Control.)

System_CAPS_pubmethod Equals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethod Finalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethod FindControl(String)

Searches the current naming container for a server control with the specified id parameter.(Inherited from Control.)

System_CAPS_protmethod FindControl(String, Int32)

This API supports the product infrastructure and is not intended to be used directly from your code. Searches the current naming container for a server control with the specified id and an integer, specified in the pathOffset parameter, which aids in the search. You should not override this version of the FindControl method.(Inherited from Control.)

System_CAPS_pubmethod Focus()

Sets input focus to a control.(Inherited from Control.)

System_CAPS_protmethod GetDesignModeState()

This API supports the product infrastructure and is not intended to be used directly from your code. Gets design-time data for a control.(Inherited from Control.)

System_CAPS_pubmethod GetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethod GetRouteUrl(Object)

Gets the URL that corresponds to a set of route parameters.(Inherited from Control.)

System_CAPS_pubmethod GetRouteUrl(RouteValueDictionary)

Gets the URL that corresponds to a set of route parameters.(Inherited from Control.)

System_CAPS_pubmethod GetRouteUrl(String, Object)

Gets the URL that corresponds to a set of route parameters and a route name.(Inherited from Control.)

System_CAPS_pubmethod GetRouteUrl(String, RouteValueDictionary)

Gets the URL that corresponds to a set of route parameters and a route name.(Inherited from Control.)

System_CAPS_pubmethod GetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethod GetUniqueIDRelativeTo(Control)

Returns the prefixed portion of the UniqueID property of the specified control.(Inherited from Control.)

System_CAPS_pubmethod HasControls()

Determines if the server control contains any child controls.(Inherited from Control.)

System_CAPS_protmethod HasEvents()

Returns a value indicating whether events are registered for the control or any child controls.(Inherited from Control.)

System_CAPS_protmethod IsLiteralContent()

This API supports the product infrastructure and is not intended to be used directly from your code. Determines if the server control holds only literal content.(Inherited from Control.)

System_CAPS_protmethod LoadControlState(Object)

Restores control-state information from a previous page request that was saved by the SaveControlState method.(Inherited from Control.)

System_CAPS_protmethod LoadPostData(String, NameValueCollection)

Processes the postback data for the TextBox control.

System_CAPS_protmethod LoadViewState(Object)

Restores view-state information from a previous request that was saved with the SaveViewState method. (Inherited from WebControl.)

System_CAPS_protmethod MapPathSecure(String)

Retrieves the physical path that a virtual path, either absolute or relative, maps to.(Inherited from Control.)

System_CAPS_protmethod MemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethod MergeStyle(Style)

Copies any nonblank elements of the specified style to the Web control, but will not overwrite any existing style elements of the control. This method is used primarily by control developers.(Inherited from WebControl.)

System_CAPS_protmethod OnBubbleEvent(Object, EventArgs)

Determines whether the event for the server control is passed up the page's UI server control hierarchy.(Inherited from Control.)

System_CAPS_protmethod OnDataBinding(EventArgs)

Raises the DataBinding event.(Inherited from Control.)

System_CAPS_protmethod OnInit(EventArgs)

Raises the Init event.(Inherited from Control.)

System_CAPS_protmethod OnLoad(EventArgs)

Raises the Load event.(Inherited from Control.)

System_CAPS_protmethod OnPreRender(EventArgs)

This API supports the product infrastructure and is not intended to be used directly from your code. Registers client script for generating postback events prior to rendering on the client, if AutoPostBack is true.(Overrides Control.OnPreRender(EventArgs).)

System_CAPS_protmethod OnTextChanged(EventArgs)

Raises the TextChanged event. This allows you to handle the event directly.

System_CAPS_protmethod OnUnload(EventArgs)

Raises the Unload event.(Inherited from Control.)

System_CAPS_protmethod OpenFile(String)

Gets a Stream used to read a file.(Inherited from Control.)

System_CAPS_protmethod RaiseBubbleEvent(Object, EventArgs)

Assigns any sources of the event and its information to the control's parent.(Inherited from Control.)

System_CAPS_protmethod RaisePostDataChangedEvent()

Invokes the OnTextChanged method when the posted data for the TextBox control has changed.

System_CAPS_protmethod RemovedControl(Control)

Called after a child control is removed from the Controls collection of the Control object.(Inherited from Control.)

System_CAPS_protmethod Render(HtmlTextWriter)

Renders the TextBox control to the specified HtmlTextWriter object.(Overrides WebControl.Render(HtmlTextWriter).)

System_CAPS_pubmethod RenderBeginTag(HtmlTextWriter)

Renders the HTML opening tag of the control to the specified writer. This method is used primarily by control developers.(Inherited from WebControl.)

System_CAPS_protmethod RenderChildren(HtmlTextWriter)

Outputs the content of a server control's children to a provided HtmlTextWriter object, which writes the content to be rendered on the client.(Inherited from Control.)

System_CAPS_protmethod RenderContents(HtmlTextWriter)

Renders the contents of the control to the specified writer. This method is used primarily by control developers.(Inherited from WebControl.)

System_CAPS_pubmethod RenderControl(HtmlTextWriter)

Outputs server control content to a provided HtmlTextWriter object and stores tracing information about the control if tracing is enabled.(Inherited from Control.)

System_CAPS_protmethod RenderControl(HtmlTextWriter, ControlAdapter)

Outputs server control content to a provided HtmlTextWriter object using a provided ControlAdapter object.(Inherited from Control.)

System_CAPS_pubmethod RenderEndTag(HtmlTextWriter)

Renders the HTML closing tag of the control into the specified writer. This method is used primarily by control developers.(Inherited from WebControl.)

System_CAPS_protmethod ResolveAdapter()

Gets the control adapter responsible for rendering the specified control.(Inherited from Control.)

System_CAPS_pubmethod ResolveClientUrl(String)

Gets a URL that can be used by the browser.(Inherited from Control.)

System_CAPS_pubmethod ResolveUrl(String)

Converts a URL into one that is usable on the requesting client.(Inherited from Control.)

System_CAPS_protmethod SaveControlState()

Saves any server control state changes that have occurred since the time the page was posted back to the server.(Inherited from Control.)

System_CAPS_protmethod SaveViewState()

Saves the changes to the text box view state since the time the page was posted back to the server.(Overrides WebControl.SaveViewState().)

System_CAPS_protmethod SetDesignModeState(IDictionary)

Sets design-time data for a control.(Inherited from Control.)

System_CAPS_pubmethod SetRenderMethodDelegate(RenderMethod)

This API supports the product infrastructure and is not intended to be used directly from your code. Assigns an event handler delegate to render the server control and its content into its parent control.(Inherited from Control.)

System_CAPS_pubmethod SetTraceData(Object, Object)

Sets trace data for design-time tracing of rendering data, using the trace data key and the trace data value.(Inherited from Control.)

System_CAPS_pubmethod SetTraceData(Object, Object, Object)

Sets trace data for design-time tracing of rendering data, using the traced object, the trace data key, and the trace data value.(Inherited from Control.)

System_CAPS_pubmethod ToString()

Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_protmethod TrackViewState()

Causes the control to track changes to its view state so they can be stored in the object's ViewState property.(Inherited from WebControl.)

Name Description
System_CAPS_pubevent DataBinding

Occurs when the server control binds to a data source.(Inherited from Control.)

System_CAPS_pubevent Disposed

Occurs when a server control is released from memory, which is the last stage of the server control lifecycle when an ASP.NET page is requested.(Inherited from Control.)

System_CAPS_pubevent Init

Occurs when the server control is initialized, which is the first step in its lifecycle.(Inherited from Control.)

System_CAPS_pubevent Load

Occurs when the server control is loaded into the Page object.(Inherited from Control.)

System_CAPS_pubevent PreRender

Occurs after the Control object is loaded but prior to rendering.(Inherited from Control.)

System_CAPS_pubevent TextChanged

Occurs when the content of the text box changes between posts to the server.

System_CAPS_pubevent Unload

Occurs when the server control is unloaded from memory.(Inherited from Control.)

Name Description
System_CAPS_pubinterface System_CAPS_privmethod IAttributeAccessor.GetAttribute(String)

This API supports the product infrastructure and is not intended to be used directly from your code. Gets an attribute of the Web control with the specified name.(Inherited from WebControl.)

System_CAPS_pubinterface System_CAPS_privmethod IAttributeAccessor.SetAttribute(String, String)

Sets an attribute of the Web control to the specified name and value.(Inherited from WebControl.)

System_CAPS_pubinterface System_CAPS_privmethod IControlDesignerAccessor.GetDesignModeState()

For a description of this member, see IControlDesignerAccessor.GetDesignModeState.(Inherited from Control.)

System_CAPS_pubinterface System_CAPS_privmethod IControlDesignerAccessor.SetDesignModeState(IDictionary)

For a description of this member, see IControlDesignerAccessor.SetDesignModeState. (Inherited from Control.)

System_CAPS_pubinterface System_CAPS_privmethod IControlDesignerAccessor.SetOwnerControl(Control)

This API supports the product infrastructure and is not intended to be used directly from your code. For a description of this member, see IControlDesignerAccessor.SetOwnerControl. (Inherited from Control.)

System_CAPS_pubinterface System_CAPS_privmethod IParserAccessor.AddParsedSubObject(Object)

For a description of this member, see IParserAccessor.AddParsedSubObject. (Inherited from Control.)

System_CAPS_pubinterface System_CAPS_privmethod IPostBackDataHandler.LoadPostData(String, NameValueCollection)

This API supports the product infrastructure and is not intended to be used directly from your code. Loads the posted text box content if it is different from the last posting.

System_CAPS_pubinterface System_CAPS_privmethod IPostBackDataHandler.RaisePostDataChangedEvent()

This API supports the product infrastructure and is not intended to be used directly from your code. Invokes the OnTextChanged method whenever posted data for the text box has changed.

System_CAPS_pubinterface System_CAPS_privproperty IControlBuilderAccessor.ControlBuilder

For a description of this member, see IControlBuilderAccessor.ControlBuilder. (Inherited from Control.)

System_CAPS_pubinterface System_CAPS_privproperty IControlDesignerAccessor.UserData

For a description of this member, see IControlDesignerAccessor.UserData. (Inherited from Control.)

System_CAPS_pubinterface System_CAPS_privproperty IDataBindingsAccessor.DataBindings

For a description of this member, see IDataBindingsAccessor.DataBindings. (Inherited from Control.)

System_CAPS_pubinterface System_CAPS_privproperty IDataBindingsAccessor.HasDataBindings

For a description of this member, see IDataBindingsAccessor.HasDataBindings. (Inherited from Control.)

System_CAPS_pubinterface System_CAPS_privproperty IExpressionsAccessor.Expressions

For a description of this member, see IExpressionsAccessor.Expressions. (Inherited from Control.)

System_CAPS_pubinterface System_CAPS_privproperty IExpressionsAccessor.HasExpressions

For a description of this member, see IExpressionsAccessor.HasExpressions. (Inherited from Control.)

Name Description
System_CAPS_pubmethod FindDataSourceControl()

Returns the data source that is associated with the data control for the specified control.(Defined by DynamicDataExtensions.)

System_CAPS_pubmethod FindFieldTemplate(String)

Returns the field template for the specified column in the specified control's naming container.(Defined by DynamicDataExtensions.)

System_CAPS_pubmethod FindMetaTable()

Returns the metatable object for the containing data control.(Defined by DynamicDataExtensions.)

The TextBox server control is an input control that lets the user enter text. By default, the TextMode property of the control is set to TextBoxMode.SingleLine, which displays a single-line text box. However, you can also use the TextBox control to display a multiline text box or a text box that masks user input by changing the value of the TextMode property to TextBoxMode.MultiLine or TextBoxMode.Password, respectively. The text displayed in the TextBox control is specified or determined by using the Text property.

The TextBox control contains several properties that allow you to control the appearance of the control. The display width of the text box, in characters, is determined by its Columns property. If the TextBox control is a multiline text box, the number of rows it displays is determined by the Rows property. To display text that wraps within the TextBox control, set the Wrap property to true.

You can also specify how data is entered in the TextBox control by setting a few properties. To prevent the text displayed in the control from being modified, set the ReadOnly property to true. If you want to limit the user input to a specified number of characters, set the MaxLength property.

For a list of initial property values for an instance of TextBox, see the TextBox constructor.

System_CAPS_caution Caution

This control can be used to accept user input, which might include malicious client script. Check any information that is sent from a client for executable script, SQL statements, or other code before displaying it in your application. You can use validation controls to verify user input before displaying the input text in a control. ASP.NET provides an input request validation feature to block script and HTML in user input. For more information, see Securing Standard ControlsHow to: Protect Against Script Exploits in a Web Application by Applying HTML Encoding to Strings, and Validating User Input in ASP.NET Web Pages.

<asp:TextBox
    AccessKey="string"
    AutoCompleteType="None|Disabled|Cellular|Company|Department|
        DisplayName|Email|FirstName|Gender|HomeCity|HomeCountryRegion|
        HomeFax|HomePhone|HomeState|HomeStreetAddress|HomeZipCode|
        Homepage|JobTitle|LastName|MiddleName|Notes|Office|Pager|
        BusinessCity|BusinessCountryRegion|BusinessFax|BusinessPhone|
        BusinessState|BusinessStreetAddress|BusinessUrl|
        BusinessZipCode|Search"
    AutoPostBack="True|False"
    BackColor="color name|#dddddd"
    BorderColor="color name|#dddddd"
    BorderStyle="NotSet|None|Dotted|Dashed|Solid|Double|Groove|Ridge|
        Inset|Outset"
    BorderWidth="size"
    CausesValidation="True|False"
    Columns="integer"
    CssClass="string"
    Enabled="True|False"
    EnableTheming="True|False"
    EnableViewState="True|False"
    Font-Bold="True|False"
    Font-Italic="True|False"
    Font-Names="string"
    Font-Overline="True|False"
    Font-Size="string|Smaller|Larger|XX-Small|X-Small|Small|Medium|
        Large|X-Large|XX-Large"
    Font-Strikeout="True|False"
    Font-Underline="True|False"
    ForeColor="color name|#dddddd"
    Height="size"
    ID="string"
    MaxLength="integer"
    OnDataBinding="DataBinding event handler"
    OnDisposed="Disposed event handler"
    OnInit="Init event handler"
    OnLoad="Load event handler"
    OnPreRender="PreRender event handler"
    OnTextChanged="TextChanged event handler"
    OnUnload="Unload event handler"
    ReadOnly="True|False"
    Rows="integer"
    runat="server"
    SkinID="string"
    Style="string"
    TabIndex="integer"
    Text="string"
    TextMode="SingleLine|MultiLine|Password"
    ToolTip="string"
    ValidationGroup="string"
    Visible="True|False"
    Width="size"
    Wrap="True|False"
/>

A Visual Studio Web site project with source code is available to accompany this topic: Download.

The following code example demonstrates how to use the TextBox control to get user input. When the user clicks the Add button, the sum of the values entered in the text boxes is displayed.

System_CAPS_security Security Note

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

<%@ Page Language="vb" AutoEventWireup="false" %>

<!DOCTYPE html>
<html> 

<head>
    <title>TextBox Example</title>
    <script runat="server">
        Protected Sub AddButton_Click(sender As Object, e As EventArgs)
            Dim Answer As Integer
            Answer = Convert.ToInt32(Value1.Text) + Convert.ToInt32(Value2.Text)
            AnswerMessage.Text = Answer.ToString()
        End Sub
    </script>
</head>
<body>
  <form id="form1" runat="server">
    <h3> TextBox Example </h3>
    <p>
        <asp:TextBox ID="Value1" Columns="2" MaxLength="3" Text="1" runat="server"/>
        +
        <asp:TextBox ID="Value2" Columns="2" MaxLength="3" Text="1" runat="server"/>
        =
        <asp:Label ID="AnswerMessage" runat="server"/>
    </p>
    <p>
        <asp:Button ID="AddButton" Text="Add" OnClick="AddButton_Click" runat="server"/>
    </p>
    <p>
        <asp:RequiredFieldValidator ID="Value1RequiredValidator" ControlToValidate="Value1"
             ErrorMessage="Please enter a value.<br />" Display="Dynamic"
             runat="server"/>
        <asp:RequiredFieldValidator ID="Value2RequiredValidator" ControlToValidate="Value2"
             ErrorMessage="Please enter a value.<br />" Display="Dynamic"
             runat="server"/>
        <asp:RangeValidator ID="Value1RangeValidator" ControlToValidate="Value1"
             Type="Integer" MinimumValue="1" MaximumValue="100" Display="Dynamic"
             ErrorMessage="Please enter an integer <br /> between than 1 and 100.<br />"
             runat="server"/>
        <asp:RangeValidator ID="Value2RangeValidator" ControlToValidate="Value2"
             Type="Integer" MinimumValue="1" MaximumValue="100" Display="Dynamic"
             ErrorMessage="Please enter an integer <br /> between than 1 and 100.<br />"    
             runat="server"/>
    </p>
  </form>
</body>
</html>
.NET Framework
Available since 1.1

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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