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ASP.Net Textbox

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ASP.NET Web Forms TextBox

This is an input control which is used to take user input. To create TextBox either we can write code or use the drag and drop facility of visual studio IDE.

This is server side control, asp provides own tag to create it. The example is given below.

< asp:TextBoxID="TextBox1" runat="server" ></asp:TextBox>

Server renders it as the HTML control and produces the following code to the browser.

<input name="TextBox1" id="TextBox1" type="text">

This control has its own properties that are tabled below.

Property Description
AccessKey It is used to set keyboard shortcut for the control.
TabIndex The tab order of the control.
BackColor It is used to set background color of the control.
BorderColor It is used to set border color of the control.
BorderWidth It is used to set width of border of the control.
Font It is used to set font for the control text.
ForeColor It is used to set color of the control text.
Text It is used to set text to be shown for the control.
ToolTip It displays the text when mouse is over the control.
Visible To set visibility of control on the form.
Height It is used to set height of the control.
Width It is used to set width of the control.
MaxLength It is used to set maximum number of characters that can be entered.
Readonly It is used to make control readonly.

Example

// WebControls.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebControls.aspx.cs" 
Inherits="WebFormsControlls.WebControls" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:Label ID="labelId" runat="server">User Name</asp:Label>
<asp:TextBox ID="UserName" runat="server" ToolTip="Enter User Name"></asp:TextBox>
        </div>
        <p>
        <asp:Button ID="SubmitButton" runat="server" Text="Submit" OnClick="SubmitButton_Click" />
        </p>
        <br />                 
    </form>
     <asp:Label ID="userInput" runat="server"></asp:Label>
</body>
</html>

Code Behind

// WebControls.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebFormsControlls
{
    public partial class WebControls : System.Web.UI.Page
    {
        protected void SubmitButton_Click(object sender, EventArgs e)
        {
            userInput.Text = UserName.Text;
        }
    }
}

This is a property window of the TextBox control.

ASP Textbox 1

Output:

It produces the following output.

ASP Textbox 2

It displays user input, when user submits the input to the server. The following screen shot taking and showing user input.

ASP Textbox 3
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