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BaseValidator.Display Property

Gets or sets the display behavior of the error message in a validation control.

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

[ThemeableAttribute(false)] 
public ValidatorDisplay Display { get; set; }
/** @property */
public ValidatorDisplay get_Display ()

/** @property */
public void set_Display (ValidatorDisplay value)

public function get Display () : ValidatorDisplay

public function set Display (value : ValidatorDisplay)

Property Value

One of the ValidatorDisplay values. The default value is Static.

Exception typeCondition

ArgumentException

The specified value is not one of the ValidatorDisplay values.

Use the Display property to specify the display behavior of the error message in the validation control. The following table lists the different values that can be used.

Display behavior

Description

None

The validation message is never displayed inline.

Static

Space for the validation message is allocated in the page layout.

Dynamic

Space for the validation message is dynamically added to the page if validation fails.

NoteNote

The display behavior depends on whether client-side validation is performed. If client-side validation is not active (because the browser does not support it or because it has been disabled by using the Page.ClientTarget page directive or EnableClientScript property), ValidatorDisplay.Static and ValidatorDisplay.Dynamic behave the same way: the error message takes up space only if it is displayed. The ability to dynamically allocate space for the message when it is not being displayed (ValidatorDisplay.Static) only works with client-side validation.

This property cannot be set by themes or style sheet themes. For more information, see ThemeableAttribute and ASP.NET Themes and Skins Overview.

TopicLocation
Walkthrough: Validating User Input in a Web Forms PageBuilding ASP .NET Web Applications in Visual Studio

The following code example demonstrates how to use the Display property to specify that space for the validation message is added to the Web page dynamically when validation fails.

<%@ Page Language="C#" %>

<script runat="server">
 
  void Button_Click(Object sender, EventArgs e) 
  {
    if (Page.IsValid)
    {
      MessageLabel.Text = "Page submitted successfully.";
    }
    else
    {
      MessageLabel.Text = "There is an error on the page.";
    }
  }
 
</script>

<html>
  <body>
    <form runat="server">

      <h3>Validator Example</h3>
     
      Enter a number from 1 to 10.
      <asp:textbox id="NumberTextBox" 
        runat="server"/>

      <asp:rangevalidator id="NumberCompareValidator" 
        controltovalidate="NumberTextBox"
        enableclientscript="False"  
        type="Integer"
        display="Dynamic" 
        errormessage="Please enter a value from 1 to 10."
        maximumvalue="10"
        minimumvalue="1"  
        text="*"
        runat="server"/>

      <asp:requiredfieldvalidator id="TextBoxRequiredValidator" 
        controltovalidate="NumberTextBox"
        enableclientscript="False"
        display="Dynamic" 
        errormessage="Please enter a value."
        text="*"
        runat="server"/>

      <br><br>

      <asp:button id="SubmitButton"
        text="Submit"
        onclick="Button_Click"
        runat="server"/>
 
      <br><br>
       
      <asp:label id="MessageLabel" 
        runat="server"/>

      <br><br>

      <asp:validationsummary
        id="ErrorSummary"
        runat="server"/>
 
    </form>
  </body>
</html>


Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

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