Cathi,

What you said is exactly what I am doing.
In addition to that, I had to change the datagrid.CurrentRowIndex to point to the new added row, otherwise if I didn't do this the textboxes will display the current row information not the new one & for that after changing the CurrentRowIndex I disable the datagrid to not allow the user to click on there and miss the data, but after updating the DA I enable it again.
By the way the problem happen only if I clicked on the datagrid after the above procedures !!.
Is there a way to count the all the rows in the datagrid not the displayed ones ?



>Ahmad,
>
>If the textboxes are bound to the child table, then add a new row to the empty child table before allowing the user to enter information to the controls.
>
>>I don't use the datagrid directly, under the datagrid in the window form I have some textboxs binded to the datasource/datarelation, all the data changes doen in these textboxs. and after updating the DataAdapter the datagrid gets updated.
>>
>>That's how I'm doing it.
>>
>>
>>>Ahmad,
>>>
>>>Try adding a new row to your child datarelation without using the datagrid and make sure it updates as expected.
>>>
>>>>Hi Cathi,
>>>>
>>>>Sorry for the dealy, it's the situation here as you know...
>>>>
>>>>Well I am not using filter, I am using a DataRelation, and mostly I face this problem if the child table has no data to be displayed in the datagrid then when I add data to it & try to update the DA I got this error, some times if the child table has a data I don't see the error.
>>>>
>>>>I already tryed to set the .CurrentRowIndex, but no effect.
>>>>
>>>>
>>>>
>>>>>Ahmad,
>>>>>
>>>>>By chance are you using a filter? If so, then right before you change your filter, try setting the DataGrid.CurrentRowIndex to zero so it will not be outside the limits of the grid after the filter.
>>>>>
>>>>>
>>>>>>Dear All,
>>>>>>
>>>>>>I am having a strange error:
>>>>>>((An unhandled exception has occurred in your application. if you click
>>>>>>continue, the application will ignore this error and attempt to continue
>>>>>>if you click quit. the application will be shut down immediately.
>>>>>>
>>>>>>Index was outside the bounds of the array.))
>>>>>>
>>>>>>This error fires, when I add a new row to my data grid.
>>>>>>
>>>>>>Any idea what could be the problem?
>>>>>>
>>>>>>Thanks in advance.