Number Text Box in C# - Pls help

Hi all,
pls help me as i have been stuck for the past 4 days with the number alone text box that i am using in my asp.net web design.

I need to alert the user once the focus of this txtbox is lost, with a msg box.

I am using C# and my javascript code is:

function CheckValue()
{
if (isNaN(document.getElementById("txtNumber"))
{
alert("Please enter numeric values only.");
return false;
}
}

I tried to get the id of the txtbox using
alert(document.getElementById("txtNumber"));
But the alert shows null. How do i pass the control to the javascript function?

my asp.net code is :

<asp:TextBox ID="txtNumber" runat="server"
Width="31px" ToolTip="1 to 100 - numbers only" MaxLength="3" ></asp:TextBox>

my C# code in the Page is :

protected void Page_Load(object sender, EventArgs e)
{
txtNumber.Attributes.Add("onblur", "CheckValue();");

}

Please help...

Feb 20 '07 #1

Subscribe Post Reply

1867

rayapatilavakumar

hi i am giving you the code in vb script
1) take 1 custom validator control
2) set propeties controltovalidate - textbox id you are validating
error message , text,give the validation function - f1
3) now add a new item vb script file (.vbs)
in that type the below code
function f1(s,args)
dim myvar,mycheck
myvar = args.value
mycheck= IsNumeric(MyVar)
if mycheck = true then
args.Isvalid= true
else
args.Isvalid= false
end if
end function
4) finally in your page's(where the text box was presented) html view ,in <head> tag write
<script language="VBScript"></script>
I hope it will help you

Feb 20 '07 #2

kenobewan

4,871

Expert 4TB

Have you resolved the problem?

Feb 22 '07 #3

wertqt

hi,
im not too sure what u want but im currently working on the textbox restricting numerical values only.
This is what i written in C#.Net :

Expand|Select|Wrap|Line Numbers

Expand|Select|Wrap|Line Numbers

string AllowChar = @"^(\d{10})$";

if (textBox1.Length == 3 && Regex.IsMatch(textBox1.Trim(), AllowChar))

{

..................

}

else

{

MessageBox.Show("Serial Number must be 3 characters in length and in numerical form.",

this.Text, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

{

Be reminded to add this at the top of the .cs file :

Expand|Select|Wrap|Line Numbers

using System.Text.RegularExpressions;

i hope this will help u.

Feb 22 '07 #4

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Number Text Box in C# - Pls help

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