Web server Controls->ASP.NET 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 control is automatically posted back to the server when the contents change 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

Examples

Textbox
ASPX Source:

<script  runat="server">
Sub submit(sender As Object, e As EventArgs)
   lbl1.Text="Your name is " & txt1.Text
End Sub
</script>

<html>
<body>

<form runat="server">
Enter your name:
<asp:TextBox id="txt1" runat="server" />
<asp:Button OnClick="submit" Text="Submit" runat="server" />
<p><asp:Label id="lbl1" runat="server" /></p>
</form>

</body>
</html>

Output Result:
Enter your name:

IF you enter your name "shaohai" into the textbox , it will shows:
Enter your name:

Your name is shaohai 

In this 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 writes a text to the Label control.

Textbox 2
ASPX Source:

<script  runat="server">
sub submit(sender As Object, e As EventArgs)
lbl1.Text=txt1.Text
end sub
</script>

<html>
<body>

<form runat="server">
<asp:TextBox id="txt1" Text="Hello World!"
Font_Face="verdana" BackColor="#0000ff"
ForeColor="white" TextMode="MultiLine"
Height="50" runat="server" />
<asp:Button OnClick="submit"
Text="Copy Text to Label" runat="server" />
<p><asp:Label id="lbl1" runat="server" /></p>
</form>

</body>
</html>

Output Result:
  

 IF you enter the text "shaohai" instead of "Hello World!", it will shows:

shaohai 

In this 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.

posted on 2007-03-27 17:18  改变热爱  阅读(226)  评论(0)    收藏  举报

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