How do i restrict entering non-numeric data

[Guest]

Hello Everybody,

How can I restrict the user entering non-numeric data in textbox control
on server side using asp.net. Any Code sample or suggestions are appreciated.

Thanks in advance
sp

 

[Kikoz]

Hey.

Server side:

protected TextBox txt;
protected Label lbl;

private void Page_Load(object sender,System.EventArgs e)
{
try
{
IsPostBack ? lbl.Visible = false : Verify();
}
catch(TextBoxIsNotValid)
{
lbl.Visible = true;
lbl.Text = "Whatever message";
}
}
private void Verify()
{
try
{
int.Parse(txt.Text.Trim());
}
catch
{
throw new TextBoxIsNotValid();
}
}

Separate class somewhere:

public class TextBoxIsNotValid : System.Exception
{
public TextBoxIsNotValid() : base("Some message to log if needed.");
}

Hope it'll help.
Kikoz

 

[Guest]

With JavaScript, you can capture keystrokes, if you wish to go that far. On
the server side, you can validate and refuse bad data. It is your choice how
heavy you want your front end to be.


---

Gregory A. Beamer
MVP; MCP: +I, SE, SD, DBA

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