swapping/changing image of image button in javascript on ClientClick

//// set value = "expand" in your image button tag, get this value to swap image randomly.

function swapimagesrc()
    {
      if(document.getElementById("imgbuttonExpand").value =="expand")
      {
         document.getElementById("imgbuttonExpand").src = '../CRMImages/close_view.fw.png';
         document.getElementById("imgbuttonExpand").value = "close";
      }
      else if(document.getElementById("imgbuttonExpand").value =="close")
      {
          document.getElementById("imgbuttonExpand").src = '../CRMImages/expand_view.fw.png';
            document.getElementById("imgbuttonExpand").value = "expand";
      }
    }

Validating file uploader in Javascript

function ValidateFile()
    {
      var validFilesTypes=["bmp","gif","png","jpg","jpeg","doc","xls"];
      var file = document.getElementById("<%=fileupload.ClientID%>");
      var path = file.value;
      var ext=path.substring(path.lastIndexOf(".")+1,path.length).toLowerCase();
      var isValidFile = false;
      for (var i=0; i<validFilesTypes.length; i++)
      {
        if (ext==validFilesTypes[i])
        {
            isValidFile=true;
            return true;
        }
      }
      if (!isValidFile)
      {
         alert('File Format is invalid.["bmp","gif","png","jpg","jpeg"] are allowed.');
         return false;
      }
    
     }   

Getting Querystring values from javascript

function ShowGridDivsonload(objID)
    {
        var qsarr = new Array();
        var qs = location.search.substring(1);
        var singleqs = new Array();
        var str ="";
        qsarr = qs.split('&');
        for( i=0; i<qsarr.length; i++)
        {
            singleqs = qsarr[i].split('=');
            str = singleqs[1]  ;
        }
           if( str == "HS")
           {
             $("#"+objID+" div").show();
             $("#"+objID+" a[Anchor] ").text("-");
             document.getElementById("imgbuttonExpand").src = '../CRMImages/close_view.fw.png';
             document.getElementById("imgbuttonExpand").value = "close";
           }
    }
   

Sorting Of The Gridview column without using Datasource

 protected void GVinsurance_onSorting(object sender, GridViewSortEventArgs e)
        {

            DataTable dt1 = (DataTable)ViewState["DT"];//GVProvider.DataSource as DataTable;
            if (dt1 != null)
            {

                if (dt1 != null)
                {
                    DataView dvSortedView = new DataView(dt1);

                    dvSortedView.Sort = e.SortExpression + " " + getSortDirectionString(e.SortDirection);

                    GVInsurance.DataSource = dvSortedView;
                    GVInsurance.DataBind();
                }

            }
        }

----------------------------------------



 private string getSortDirectionString(SortDirection sortDirection)
        {
            string newSortDirection = String.Empty;

            if (Convert.ToString(ViewState["newSortDirection"]) == "DESC")
            {
                ViewState["newSortDirection"] = "ASC";
            }
            else
                ViewState["newSortDirection"] = "DESC";

            return newSortDirection = Convert.ToString(ViewState["newSortDirection"]);
        }

Validating number of characters before and after decimal point using javascript

  function validatemaxAmt(sender, evt)
{
              var splitValue = sender.value.split(".", 2);

        
                  if(splitValue[0] != null)
                 {
                    if(splitValue[0].length < 7)
                    {
                       // alert("Correct format.");
                        return true; // allow postback (if applicable)
                    }
                    else
                    {
                        alert("Incorrect number of decimal digits.");
                        sender.value="0";
                        sender.focus();
                        return false; // disallow postback (if applicable)
              
                    }
                }
}

Handling the radio button list with yes or no confirmation message in C#

rdbbilltype.Attributes.Add("onclick", "if(!confirm('Are you sure to change the bill type? ')) return false;");

Looks simple but it will allow only when the OK button is clicked, Or else it wont change the selection.

Awesome...!!!

Javascript validation for special characters in ASP.NET/ C#

function validatespecailchars()
{

     var txtbox = document.getElementById('<%=txtsearch.ClientID %>').value;
   
      var str="<";
        var str1=">";
        var str2="--";
        var str3=";";
        var str4="'";

    if((txtbox.indexOf(str)>=0)||(txtbox.indexOf(str1)>=0)||(txtbox.indexOf(str2)>=0)||      (txtbox.indexOf(str3)>=0)||(txtbox.indexOf(str4)>=0))
    {
         alert('Special Characters are not Allowed.');
        // you can focus here that particular control
     }
}