ASP.NET

<asp:RadioButtonList runat="server" ID="rdBtnPersonel_Status" RepeatDirection="Horizontal" Width="100%"
                                                                                DataSourceID="ObjDsPersonelStatuses" onclick="javascript:radioButtonListOnClick('<%#((RadiobuttonList)Container.FindControl("rdBtnPersonel_Status")).ClientID %>');">

                                                                            </asp:RadioButtonList>

In if else structure when null arguments are passed to two string variables then it always hit the condition when i have set Var1 != "" && Var2 != "" why ? since nulls are passed to both then why it hits this condition ?

public ActionResult ShowCalTextBox(String DateFrom, String DateTo)
        {

           if (DateFrom != "" && DateTo == "")
            {
                IEnumerable<GetEmpRec_DateResult> EmpRec_DateFrom = DataContext.GetEmpRec_Date(DateFrom, null).ToList();
                ViewBag.Dates = "Records for"+" "+ DateFrom ;
                return View(EmpRec_DateFrom);

            }
            else if (DateFrom == "" && DateTo != "")
            {
                IEnumerable<GetEmpRec_DateResult> EmpRec_DateTo = DataContext.GetEmpRec_Date(null, DateTo).ToList();
                ViewBag.Dates = "Records for" + " " + DateTo;
                return View(EmpRec_DateTo);
            }
            else if (DateFrom != "" && DateTo != "")
            {
                IEnumerable<GetEmpRec_DateResult> EmpRec_ByDate = DataContext.GetEmpRec_Date(DateFrom, DateTo).ToList();
                ViewBag.Dates = "Records from" + " " + DateFrom +" "+"to"+" "+DateTo;
                return View(EmpRec_ByDate);
            }
            else if (DateFrom == "" && DateTo == "")
            {
                IEnumerable<GetEmpRec_DateResult> EmpRec_Default = DataContext.GetEmpRec_Date(null, null).ToList();
                ViewBag.Dates = "No date selection";
                return View(EmpRec_Default);
            }

            return View();
        }

Try
    GenerateKeys(myRow)
    If InsertProviderMasterCommand(myRow) = True Then
          MasterInsertCount += 1
    End If
Catch ex As Exception
     Throw ex
  End Try

<anonymousIdentification enabled="true"/>
<profile enabled="true">
  <properties>
    <add name="FName" type="String" allowAnonymous="true"/>
  </properties>
</profile>
<authentication mode="Windows" />

Profile.FName = TextBox1.Text;
Response.Write("Your name is: " + Profile.FName);

public virtual ActionResult ListAjax([DataSourceRequest] DataSourceRequest request)
{
    var d = myWebService.GetD(s, c, f);
    var dList = d.Select(x => x.DId).ToList();
    DataSourceResult result = d.ToDataSourceResult(request);
    return Json(result);
}