TextBox Constructor ()
.NET Framework (current version)
Initializes a new instance of the TextBox class.
Assembly: System.Web (in System.Web.dll)
The following code example demonstrates how to use the TextBox constructor to dynamically add a TextBox control to the page.
Security Note
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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="C#" AutoEventWireup="True" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title> TextBox Constructor Example </title> <script runat="server"> protected void Page_Load(Object sender, EventArgs e) { // Create UserTextBox TextBox control. TextBox UserTextBox = new TextBox(); // Configure the UserTextBox TextBox control. UserTextBox.ID = "UserTextBox"; UserTextBox.Columns = 50; // Add UserTextBox TextBox control to the Controls collection // of the TextBoxControlPlaceHolder PlaceHolder control. TextBoxControlPlaceHolder.Controls.Add(UserTextBox); } protected void Submit_Click(Object sender, EventArgs e) { // Retrieve the UserTextBox TextBox control from the TextBoxControlPlaceHolder // PlaceHolder control. TextBox TempTextBox = (TextBox)TextBoxControlPlaceHolder.FindControl("UserTextBox"); // Display the Text property. Message.Text = "The TextBox control above is dynamically generated. <br /> You entered: " + TempTextBox.Text; } </script> </head> <body> <form id="form1" runat="server"> <h3> TextBox Constructor Example </h3> Enter some text and click the Submit button. <br /><br /> <asp:PlaceHolder ID="TextBoxControlPlaceHolder" runat="server"/> <br /><br /> <asp:Button ID="SubmitButton" Text="Submit" OnClick="Submit_Click" runat="server"/> <br /><br /> <asp:Label ID="Message" runat="server"/> </form> </body> </html>
.NET Framework
Available since 1.1
Available since 1.1
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