TextBox Control

Definition and Usage

The TextBox control is used to create a text box where the user can input text.

Properties

Property	Description
AutoPostBack	A Boolean value that specifies whether the form should be posted immediately after the contents of the textbox has changed or not. Default is false
Columns	The width of the textbox
id	A unique id for the control
MaxLength	The maximum number of characters allowed in the textbox
OnTextChanged	The name of the function to be executed when the text in the textbox has changed
Rows	The height of the textbox (only used if TextMode="Multiline")
runat	Specifies that the control is a server control. Must be set to "server"
Text	The contents of the textbox
TextMode	SingleLine creates a text box with only one line. MultiLine creates a text box with multiple lines. Password creates a one-line text box that masks the value entered by the user. Default is SingleLine. Legal values are: SingleLine MultiLine Password
Wrap	A Boolean value that indicates whether the contents of the textbox should wrap or not

Example 1

In the following example we declare one TextBox control, one Button control, and one Label control in an .aspx file. When the submit button is triggered, the submit subroutine is executed. The submit subroutine copies the contents of the textbox to the Label control:

<script runat="server">
  Sub submit(sender As Object, e As EventArgs)
    lbl.Text=txt.Text
  End Sub
</script>

<html>
<body>
<form runat="server">
<asp:TextBox id="txt" Text="Hello World!" Font_Face="Arial"
BackColor="darkblue" ForeColor="white" TextMode="MultiLine"
Height="50" runat="server"/>
<br /><br />
<asp:Button OnClick="submit" Text="Copy Text to Label"
runat="server"/>
<br /><br />
<asp:Label id="lbl" runat="server"/>
</form>
</body>
</html>

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