Error:Object reference not set to an instance of an object

[mady1380]

hi all

i know this is common error. i ve been through many solutions.

But i am not able to solve it.

here is my error
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System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
Line 22: {
Line 23:
Line 24: sID = Convert.ToInt32(Request.QueryString["Edit"].ToString());
Line 25: if (Request.QueryString["Edit"] == "")
Line 26: Function = "Save";


Source File: c:\Inetpub\wwwroot\VApp\Forms\AccountAddNew.aspx.c s Line: 24


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my code is

************************************************** ****************

public partial class Forms_AccountAddNew : Vakakis.UI.Forms.Base.AccountBR
{
public string Function = "";
public int sID = 0;

protected void Page_Load(object sender, EventArgs e)
{

sID = Convert.ToInt32(Request.QueryString["Edit"].ToString());
if (Request.QueryString["Edit"] == "")
Function = "Save";
else
Function = "Update";

if (Function == "Update")
{
AccountEntity a = (AccountEntity)this.selectOneRecord(sID);
txtAccountNo.Text = a.Accountno;
txtAccountHolder.Text = a.Accountholder;
txtBankName.Text = a.Bankname;
txtBankAddress.Text = a.Bankaddress;
txtSwift.Text = a.Swift;
txtIBANCode.Text = a.Ibancode;
}
}
************************************************** **********************

Any help would be appreciated..

Thanx..
mady

[radcaesar]

Debug and check whether Request.QueryString["Edit"].ToString() method will return anything or NULL

:)

[mady1380]

Debug and check whether Request.QueryString["Edit"].ToString() method will return anything or NULL

:)

thanx...alot..
yes it actually sometimes when i open this page without giving the querystring it shows this problem. so i have to return empty Querystring.

thanx :)