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HtmlInputText.MaxLength Property

Gets or sets the maximum number of characters that can be entered in the text box.

[Visual Basic]
Public Property MaxLength As Integer
[C#]
public int MaxLength {get; set;}
[C++]
public: __property int get_MaxLength();
public: __property void set_MaxLength(int);
[JScript]
public function get MaxLength() : int;
public function set MaxLength(int);

Property Value

The maximum number of characters that can be entered in the text box.

Remarks

Use the MaxLength property to specify or determine the maximum number of characters that can be entered in the text box.

Example

[Visual Basic, C#] The following example demonstrates how to use the MaxLength property to specify the maximum number of characters that can be entered in the text box.

[Visual Basic] 
<%@ Page Language="VB" AutoEventWireup="True" %>

<html> 

<head>

   <script runat="server">

      Protected Sub AddButton_Click(sender As Object, e As EventArgs)

         Dim Answer As Integer

         Answer = Convert.ToInt32(Value1.Value) + Convert.ToInt32(Value2.Value)

         AnswerMessage.InnerHtml = Answer.ToString()

      End Sub

   </script>

</head>

<body>

   <form runat="server">

      <h3> HtmlInputText Example </h3>

      <table>

         <tr>

            <td colspan="5">

               Enter integer values into the text boxes. <br>
               Click the Add button to add the two values. <br>
               Click the Reset button to reset the text boxes.

            </td>

         </tr>

         <tr>

            <td colspan="5">

               &nbsp;

            </td>

         </tr>

         <tr align="center">

            <td>

               <input ID="Value1"
                      Type="Text"
                      Size="2"
                      MaxLength="3"
                      Value="1"
                      runat="server"/>

            </td>

            <td>

               + 

            </td>

            <td>

               <input ID="Value2"
                      Type="Text"
                      Size="2"
                      MaxLength="3"
                      Value="1"
                      runat="server"/>

            </td>

            <td>

               =

            </td>

            <td>
               
               <span ID="AnswerMessage"
                     runat="server"/>

            </td>

         </tr>

         <tr>

            <td colspan="2">

               <asp:RequiredFieldValidator
                    ID="Value1RequiredValidator"
                    ControlToValidate="Value1"
                    ErrorMessage="Please enter an value.<br>"
                    Display="Dynamic"
                    runat="server"/>

               <asp:CompareValidator
                    ID="Value1MinCompareValidator"
                    ControlToValidate="Value1"
                    Operator="LessThan"
                    Type="Integer"
                    ValueToCompare="100"
                    ErrorMessage="Please enter an integer less than 100.<br>"
                    Display="Dynamic"
                    runat="server"/>

               <asp:CompareValidator
                    ID="Value1MaxCompareValidator"
                    ControlToValidate="Value1"
                    Operator="GreaterThan"
                    Type="Integer"
                    ValueToCompare="0"
                    ErrorMessage="Please enter an integer greater than 0.<br>"
                    Display="Dynamic"
                    runat="server"/>

            </td>

            <td colspan="2">

               <asp:RequiredFieldValidator
                    ID="Value2RequiredValidator"
                    ControlToValidate="Value2"
                    ErrorMessage="Please enter an value.<br>"
                    Display="Dynamic"
                    runat="server"/>

               <asp:CompareValidator
                    ID="Value2MinCompareValidator"
                    ControlToValidate="Value2"
                    Operator="LessThan"
                    Type="Integer"
                    ValueToCompare="100"
                    ErrorMessage="Please enter an integer less than 100.<br>"
                    Display="Dynamic"
                    runat="server"/>

               <asp:CompareValidator
                    ID="Value2MaxCompareValidator"
                    ControlToValidate="Value2"
                    Operator="GreaterThan"
                    Type="Integer"
                    ValueToCompare="0"
                    ErrorMessage="Please enter an integer greater than 0.<br>"
                    Display="Dynamic"
                    runat="server"/>

            </td>

            <td>

               &nbsp
 
            </td

         </tr>

         <tr align="center">

            <td colspan="4">

               <input Type="Submit"
                      Name="AddButton
                      Value="Add"
                      OnServerClick="AddButton_Click"
                      runat="server"/>

               &nbsp;&nbsp;&nbsp;

               <input Type="Reset"
                      Name="AddButton
                      Value="Reset"
                      runat="server"/>

            </td>

            <td>

               &nbsp;

            </td>

         </tr>

      </table>

   </form>

</body>
</html>

[C#] 
<%@ Page Language="C#" AutoEventWireup="True" %>

<html> 

<head>

   <script runat="server">

      protected void AddButton_Click(Object sender, EventArgs e)
      {
         int Answer;

         Answer = Convert.ToInt32(Value1.Value) + Convert.ToInt32(Value2.Value);

         AnswerMessage.InnerHtml = Answer.ToString();

      }

   </script>

</head>

<body>

   <form runat="server">

      <h3> HtmlInputText Example </h3>

      <table>

         <tr>

            <td colspan="5">

               Enter integer values into the text boxes. <br>
               Click the Add button to add the two values. <br>
               Click the Reset button to reset the text boxes.

            </td>

         </tr>

         <tr>

            <td colspan="5">

               &nbsp;

            </td>

         </tr>

         <tr align="center">

            <td>

               <input ID="Value1"
                      Type="Text"
                      Size="2"
                      MaxLength="3"
                      Value="1"
                      runat="server"/>

            </td>

            <td>

               + 

            </td>

            <td>

               <input ID="Value2"
                      Type="Text"
                      Size="2"
                      MaxLength="3"
                      Value="1"
                      runat="server"/>

            </td>

            <td>

               =

            </td>

            <td>
               
               <span ID="AnswerMessage"
                     runat="server"/>

            </td>

         </tr>

         <tr>

            <td colspan="2">

               <asp:RequiredFieldValidator
                    ID="Value1RequiredValidator"
                    ControlToValidate="Value1"
                    ErrorMessage="Please enter an value.<br>"
                    Display="Dynamic"
                    runat="server"/>

               <asp:CompareValidator
                    ID="Value1MinCompareValidator"
                    ControlToValidate="Value1"
                    Operator="LessThan"
                    Type="Integer"
                    ValueToCompare="100"
                    ErrorMessage="Please enter an integer less than 100.<br>"
                    Display="Dynamic"
                    runat="server"/>

               <asp:CompareValidator
                    ID="Value1MaxCompareValidator"
                    ControlToValidate="Value1"
                    Operator="GreaterThan"
                    Type="Integer"
                    ValueToCompare="0"
                    ErrorMessage="Please enter an integer greater than 0.<br>"
                    Display="Dynamic"
                    runat="server"/>

            </td>

            <td colspan="2">

               <asp:RequiredFieldValidator
                    ID="Value2RequiredValidator"
                    ControlToValidate="Value2"
                    ErrorMessage="Please enter an value.<br>"
                    Display="Dynamic"
                    runat="server"/>

               <asp:CompareValidator
                    ID="Value2MinCompareValidator"
                    ControlToValidate="Value2"
                    Operator="LessThan"
                    Type="Integer"
                    ValueToCompare="100"
                    ErrorMessage="Please enter an integer less than 100.<br>"
                    Display="Dynamic"
                    runat="server"/>

               <asp:CompareValidator
                    ID="Value2MaxCompareValidator"
                    ControlToValidate="Value2"
                    Operator="GreaterThan"
                    Type="Integer"
                    ValueToCompare="0"
                    ErrorMessage="Please enter an integer greater than 0.<br>"
                    Display="Dynamic"
                    runat="server"/>

            </td>

            <td>

               &nbsp
 
            </td

         </tr>

         <tr align="center">

            <td colspan="4">

               <input Type="Submit"
                      Name="AddButton
                      Value="Add"
                      OnServerClick="AddButton_Click"
                      runat="server"/>

               &nbsp;&nbsp;&nbsp;

               <input Type="Reset"
                      Name="AddButton
                      Value="Reset"
                      runat="server"/>

            </td>

            <td>

               &nbsp;

            </td>

         </tr>

      </table>

   </form>

</body>
</html>

[C++, JScript] No example is available for C++ or JScript. To view a Visual Basic or C# example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

HtmlInputText Class | HtmlInputText Members | System.Web.UI.HtmlControls Namespace

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