validate based on radiobuttion selection using custion validator

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i want to validate a textbox length is 15 when radiobuttion1 is selected and textbox length is 16 when radiobuttion2 is selected

I used the following code it's not worked

XML

<asp:TextBox ID="TextBox1" runat="server" MaxLength="16" ></asp:TextBox>
<asp:CustomValidator ID="CustomValidator2" runat="server"   ControlToValidate="TextBox2" ErrorMessage="Not Valid Number" ClientValidationFunction="validcard" ></asp:CustomValidator>

 <script type="text/javascript">
    function validcard()
    {
     var isValid = false;
     if (RadioButtonList1[0].checked == true)
     {
        if (Textbox2.length == 15)
        {
            isValid = true;
        }
        else
        {
            isValid = false;
        }

      }
      else if (RadioButtonList1[1].checked == true)
      {
       if (Textbox2.length == 16)
       {
          isValid = true;
       }
       else
       {
          isValid = false;
       }

      }
      else isValid = false;


         return isValid;
     }
</script>

Posted 14-Aug-13 2:51am

surendra4u

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2 solutions

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

thanh_bkhn · Answer 1 · 2013-08-14T03:16:00

Your control is server side controls and your validation code is in Javascript, so you cannot access to the control like when you're coding at server side.
In your Javascript, try this to access the textbox:

JavaScript

if (document.getElementById("TextBox2").value.length == 15)

Use this with your radio buttons:

JavaScript

if (document.getElementById("RadioButtonList1")[0].checked)

and

JavaScript

if (document.getElementById("RadioButtonList1")[1].checked)

surendra4u · Answer 2 · 2013-08-15T10:15:00

XML

<script runat="server">

      void ValidateBtn_OnClick(object sender, EventArgs e)
      {
         // Display whether the page passed validation.
         if (Page.IsValid)
         {

             myfun();
         }
      }

      void ServerValidation(object source, ServerValidateEventArgs args)
      {
          string txt;
          txt=Text1.Text;
          if (RadioButtonList1.SelectedValue == "1")
          {
              if (txt.Length == 15)
                  args.IsValid = true;

              else
                  args.IsValid = false;

          }
          else if (RadioButtonList1.SelectedValue == "2")
          {
              if (txt.Length == 16)
                  args.IsValid = true;

              else
                  args.IsValid = false;
          }
          else args.IsValid = false;
      }

   </script>


   ///////////////////////////////

   <asp:RadioButtonList
              ID="RadioButtonList1" runat="server">
          <asp:ListItem Value="1">amex</asp:ListItem>
          <asp:ListItem Value="2">other</asp:ListItem>
   </asp:RadioButtonList>

    <asp:TextBox id="Text1" runat="server" />
    <asp:RequiredFieldValidator ID="RFVdob" runat="server" ControlToValidate="Text1" ErrorMessage="Enter Card number" Font-Bold="True" ForeColor="Red"></asp:RequiredFieldValidator>
    <asp:RegularExpressionValidator ID="REt1" runat="server" ControlToValidate="Text1"    ValidationExpression="^\d+$" ErrorMessage="Numbers only " Font-Bold="True" ForeColor="Red" ></asp:RegularExpressionValidator>



   <asp:CustomValidator id="CustomValidator1"
           ControlToValidate="Text1"
           Display="Static"
           ErrorMessage="Enter valid number!"
           ForeColor="green"
           Font-Names="verdana"
           Font-Size="10pt"
           OnServerValidate="ServerValidation"
           runat="server"/>

      <br />

      <asp:Button id="Button1"
           Text="Validate"
           OnClick="ValidateBtn_OnClick"
           runat="server"/>

validate based on radiobuttion selection using custion validator

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validate based on radiobuttion selection using custion validator

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