Pan Card Validation in C#

Add below code to your head section of page under script tag.

function chkPANLen(sender, args)
        {
            var PANno = document.getElementById("").value;
            var pan = /^([A-Z a-z]{5})+([0-9]{4})+([A-Z a-z]{1})$/;
            if (!(PANno.match(pan)))
            {
                args.IsValid = false ;
                return;
            }
            args.IsValid = true ;
        }

Below is the code to validate your control

Pan No. :
                   

Reference: Muthukumar (http://nadarmuthukumar.blogspot.in)

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Call Javascript from Code Behind

There are time when you need to call your Javascript function from code behind.
You can achieve the same using below code,

Javascript function to call

function ConfirmBox(objMsg)
    {
        if(confirm(objMsg))
        {
            alert('test');
            return true;
        }
        else
        {
            return false;
        }
    }

C# Code Behind

this.ClientScript.RegisterStartupScript(typeof(Page), "Popup", "ConfirmBox('" + str + "');", true);

Or

this.ClientScript.RegisterStartupScript(typeof(Page), "Popup", "alert('" + str + "');", true);

Reference: Muthukumar (http://nadarmuthukumar.blogspot.in)

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Check Value is Integer

function ValidateInteger(Obj)
    {
        if(Obj.toString().indexOf(".") > -1)
        {alert('Kindly enter amount in multiples of 1.'); return false;}

        if(parseInt(Obj)==NaN)
        {alert('Invalid Amount.'); return false;}
        
        return true;
    }

Reference: Muthukumar (http://nadarmuthukumar.blogspot.in/)

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Validate RadioButton in GridView, DataGrid, DataList

JavaScript inside Script Tag on your page.

    function ValidateSelection()
    {
        var grid = document.getElementById("");
        var Selected = 0;
        for (i = 1; i < grid.rows.length; i++)
        {
            if(grid.rows[i].getElementsByTagName("input")[0] != null
                && grid.rows[i].getElementsByTagName("input")[0].type == "radio" 
                && grid.rows[i].getElementsByTagName("input")[0].checked)
                {
                    Selected = 1;
                    break;
                }
        }
        if(Selected==0)
        { alert('Please select any row to proceed.'); return false; }
        else
        { return true; }
    }

Designer

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