Page index error

lily611 · August 27th, 2004, 05:14 AM

I have designed a datagrid and set the paging=true, by default displaying 10 rows in one page. I am updating the status of the records and the rows are getting disappeared from the datagrid. My problem is when the last record of the page is disabled and disappearing the row i am getting error "System.Web.HttpException: Invalid CurrentPageIndex value. It must be >= 0 and < the PageCount"

I have given the properties of datagrid in design as :-

<asp:datagrid id="DataGrid1" runat="server" datakeyfield="nExperienceId" EditItemStyle-ForeColor="black" EditItemStyle-BackColor="#ff6600" GridLines="Both" BorderWidth="0px" BorderStyle="Inset" ShowHeader="True" ItemStyle-BackColor="#ffcc99" HeaderStyle-ForeColor="#ffffff" HeaderStyle-BackColor="#ff6600" AlternatingItemStyle-BackColor="#ff9966" BorderColor="#E0EDF4" CellSpacing="1" CellPadding="5" AutoGenerateColumns="False" Width="537px" AllowSorting="True" background="imgs/blue_middle.gif" BackColor="Red" AllowPaging="True" PagerStyle-HorizontalAlign="Right">
<PagerStyle Mode="NumericPages"></PagerStyle>

And in code behind i have written as
private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEvent Args e)
        {
            DataGrid1.CurrentPageIndex = e.NewPageIndex;

        }

Can anyone help me?

mehdi62b · August 27th, 2004, 06:20 AM

change your algoritm of deleting the rows.
(I mean you can delete all the rows in dataset(or in your datasource)then again bind your grid).

--------------------------------------------
Mehdi.:)

lily611 · August 27th, 2004, 06:25 AM

After updating the data I am binding it but the same error is coming.

mehdi62b · August 27th, 2004, 07:16 AM

not only binding,you should also fill your datasource again,
although this error tells you CurrentPageIndex has a negative value.

--------------------------------------------
Mehdi.:)

lily611 · August 30th, 2004, 01:10 AM

Hi Mehdi,
Thanks u replied. But i am filling the datagrid as well as binding. But after the last record getting updated same error is coming.

mehdi62b · August 30th, 2004, 02:38 PM

Hi,
as I told you if you do these steps correctly you should not face this problem
1-delete the row(s) from datasource(or your probable dataset)in any order
2-change the datasource of your grid
3-bind your grid
finally your datasource is empty and your grid doesnt show any filed without any error
I dont know exactly how you delete the rows ...
anyway try this optional way for avoiding this error...

Code:

System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
{
  if((e.NewPageIndex>=0) & (e.NewPageIndex<=DataGrid1.PageCount))
            DataGrid1.CurrentPageIndex = e.NewPageIndex;
  else
            DataGrid1.CurrentPageIndex =0;
}

HtH.

--------------------------------------------
Mehdi.:)

lily611 · August 31st, 2004, 01:55 AM

I tried with this but getting the same error.I used like this

private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEvent Args e)
        {
            if((e.NewPageIndex>=0) & (e.NewPageIndex<=DataGrid1.PageCount))
            {
                DataGrid1.CurrentPageIndex = e.NewPageIndex;
                                BindData();

            }
            else
            {
                DataGrid1.CurrentPageIndex =0;
                                BindData();

            }
        }

Actually i am not exactly deleting, i have retrieved the values in the datagrid based on the status=0 and updating the status=1 after clicking the link given on the values at datagrid.After updating the status into 1 its getting disappeared from the datagrid,as the status changes.But after the last record getting updated this error comes.
I am really tried a lot and stuck up here.

mehdi62b · August 31st, 2004, 11:19 AM

change it like below ....

Code:

private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
        {
if((e.NewPageIndex>=0) & (e.NewPageIndex<DataGrid1.PageCount))
            {
                DataGrid1.CurrentPageIndex = e.NewPageIndex;  
            }
            else
            {
                DataGrid1.CurrentPageIndex =0;
            }
        BindData();
        }

HtH.

--------------------------------------------
Mehdi.:)