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| ASP.NET - The TextBox Control |
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To create a text box where the user can input tex,the TextBox control is used .
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The TextBox Control
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To create a text box where the
user can input text,the TextBox control is used.
The TextBox control's properties and attributes
are listed in our
web controls reference page
The following example demonstrates some of the attributes you may
use with the TextBox control:
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<html>
<body>
<form runat="server">
A basic TextBox:
<asp:TextBox id="tb1" runat="server" />
<br /><br />
A password TextBox:
<asp:TextBox id="tb2" TextMode="password" runat="server" />
<br /><br />
A TextBox with text:
<asp:TextBox id="tb4" Text="Hello World!" runat="server" />
<br /><br />
A multiline TextBox:
<asp:TextBox id="tb3" TextMode="multiline" runat="server" />
<br /><br />
A TextBox with height:
<asp:TextBox id="tb6" rows="5" TextMode="multiline"
runat="server" />
<br /><br />
A TextBox with width:
<asp:TextBox id="tb5" columns="30" runat="server" />
</form>
</body>
</html>
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Add a Script
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The settings and contents of a TextBox control may be changed by server scripts when a form is submitted. A form can be submitted when a user changes the value in the TextBox control or by clicking on a button.
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 and the submit subroutine writes a text to the Label control:
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<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>
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The example given below declare one TextBox control and one Label control in an .aspx file.
When you change the value in the TextBox and either click press the Tab key or outside the TextBox,
the change subroutine is executed.To the Label control,the submit subroutine writes a text:
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<script runat="server">
Sub change(sender As Object, e As EventArgs)
lbl1.Text="You changed text to " & txt1.Text
End Sub
</script>
<html>
<body>
<form runat="server">
Enter your name:
<asp:TextBox id="txt1" runat="server"
text="Hello World!"
ontextchanged="change" autopostback="true"/>
<p><asp:Label id="lbl1" runat="server" /></p>
</form>
</body>
</html>
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