Number Text Box in C# - Pls help

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  • MariaJC
    New Member
    • Feb 2007
    • 11
    #1

    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(objec t sender, EventArgs e)
    {
    txtNumber.Attri butes.Add("onbl ur", "CheckValue();" );

    }

    Please help...
    Tags: None
    • rayapatilavakumar
      New Member
      • Jan 2007
      • 6
      #2
      hi i am giving you the code in vb script
      1) take 1 custom validator control
      2) set propeties controltovalida te - 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="VBScr ipt"></script>
      I hope it will help you

        Comment

        • kenobewan
          Recognized Expert Specialist
          • Dec 2006
          • 4871
          #3
          Have you resolved the problem?

            Comment

            • wertqt
              New Member
              • Feb 2007
              • 21
              #4
              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 :
              Code:
              [CODE]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);
            
{
              [/CODE]

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

              Code:
              using System.Text.RegularExpressions;
              i hope this will help u.

                Comment

                • MariaJC
                  New Member
                  • Feb 2007
                  • 11
                  #5
                  Originally posted by kenobewan
                  Have you resolved the problem?
                  hi

                  thanx

                  it has been resolved


                  rgds

                    Comment

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