Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index

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Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
I got this error i am writing this code
the error will comes if condition int userid

C#

foreach (GridViewRow gvrow in gvuserdetails1.Rows)
       {
           //Finiding checkbox control in gridview for particular row
           CheckBox chkdelete = (CheckBox)gvrow.FindControl("chkdelete");
           //Condition to check checkbox selected or not
           if (chkdelete.Checked)
           {
               //Getting UserId of particular row using datakey value
               int usrid = Convert.ToInt32(gvuserdetails1.DataKeys[gvrow.RowIndex].Value);
               objusers.DeleteParameters["UserId"].DefaultValue = usrid.ToString();
               objusers.Delete();
           }

Posted 9-Jun-13 19:27pm

Gujula Ravindra Reddy

Updated 9-Jun-13 19:40pm

Jameel VM

v2

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Rockstar_ 10-Jun-13 1:44am

You are getting error at this line : int usrid = Convert.ToInt32(gvuserdetails1.DataKeys[gvrow.RowIndex].Value);

So check with break point each loop for the value of gvrow.RowIndex , may be getting error at last loop,try keeping int usrid = Convert.ToInt32(gvuserdetails1.DataKeys[gvrow.RowIndex-1].Value);

Francisco T. Chavez 10-Jun-13 1:46am

Is it the code for getting use user id that's giving you the error or the code for deleting that row?

2 solutions

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_Amy · Answer 1 · 2013-06-09T19:55:00

The error means what it says. If you were to use your debugger, you could see what was going on.

gvuserdetails1.DataKeys has less or equal number of keys, than gvrow.RowIndex, that's why you are getting this exception.

Just make sure that "DataKeyNames" property is set with any field id(i.e UserID etc). When you have set DataKeyNames property, Gridview control automatically creates DataKey object for each row.

--Amit

Thanks7872 · Answer 2 · 2013-06-09T19:56:00

Solution 2

Try like :

C#

CheckBox chk = (CheckBox)gvrow.Cells[index value of checkbox column].FindControl("chkdelete");

and follow the other answer also.

Posted 9-Jun-13 19:56pm

Thanks7872

Updated 9-Jun-13 19:58pm

v3