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

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C#

ASP.NET

Error:
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

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

Source Error:

Line 83:       //  int CatId1 = Convert.ToInt32(gvDetails.DataKeys[e.RowIndex].Value.ToString());
Line 84:        // Label catid1 = ((Label)(gvDetails.Rows[e.RowIndex].FindControl("lb_id")));
Line 85:         int catid1 = Convert.ToInt32(gvDetails.DataKeys[e.RowIndex].Value.ToString());
Line 86:         string catname = gvDetails.DataKeys[e.RowIndex].Values["catname"].ToString();
Line 87:         TextBox txtname = (TextBox)gvDetails.Rows[e.RowIndex].FindControl("txtname");


Source File: e:\project b2bchennai\Admin\CategoryDetail.aspx.cs    Line: 85 

Coding for View:

protected void BindDetails()
    {
        //int catid=Convert.ToInt32(gvDetails.DataKeys.ToString());
        con.Open();
        SqlCommand cmd = new SqlCommand("select top 1 catname,catdesc from categorydetail order by catid desc", con);
       // SqlCommand cmd = new SqlCommand("select * from categorydetail order by catname,catdesc desc limit 1", con);
       // SqlCommand cmd = new SqlCommand("SELECT  TOP 1 catname,catdesc  FROM categorydetail", con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        con.Close();
        if (ds.Tables[0].Rows.Count > 0)
        {
            gvDetails.DataSource = ds;
            gvDetails.DataBind();
        }
        else
        {
            ds.Tables[0].Rows.Add(ds.Tables[0].NewRow());
            gvDetails.DataSource = ds;
            gvDetails.DataBind();
            int columncount = gvDetails.Rows[0].Cells.Count;
            gvDetails.Rows[0].Cells.Clear();
            gvDetails.Rows[0].Cells.Add(new TableCell());
            gvDetails.Rows[0].Cells[0].ColumnSpan = columncount;
            gvDetails.Rows[0].Cells[0].Text = "No Records Found";
        }
    }




 protected void gvDetails_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
         int catid1 = Convert.ToInt32(gvDetails.DataKeys[e.RowIndex].Value.ToString());
        string catname = gvDetails.DataKeys[e.RowIndex].Values["catname"].ToString();
        TextBox txtname = (TextBox)gvDetails.Rows[e.RowIndex].FindControl("txtname");
        TextBox txtdesc = (TextBox)gvDetails.Rows[e.RowIndex].FindControl("txtdesc");
        con.Open();
        SqlCommand cmd = new SqlCommand("update  categorydetail set catname='" + txtname.Text + "',catdesc='" + txtdesc.Text + "' where catid="+catid1,con);
        cmd.ExecuteNonQuery();
        con.Close();
        lblresult.ForeColor = Color.Green;
        lblresult.Text = catname + " Details Updated successfully";
        gvDetails.EditIndex = -1;
        BindDetails();
    }