datagrid not handling new row correctly

[Suzanne Stegman]

Hi syncfusion,

I have been much helped from your datagrid FAQ for windows forms.

I downloaded datagridtextboxcombo_vb.zip and am attempting to use the class in a new project I am working on. I set up some properties to set up the combobox with a dataset and set the display/value members. When I run it from my user control (instead of a form), I am getting some looping on the edit sub and also on a new row, the is setting the edit on the previous row and then erroring with "the ListManager's position must be equal to rowNum. Parameter name: rowNum.

Any help you can give in resolving this error would greatly appreciated!

Thanks in advance,
Suzanne

[Administrator]

In the ComboBoxColumn class, at the end of the SetColomnValueAtRow function, encapsulate the last call like so:
if(source.Position == rowNum)
{
base.SetColumnValueAtRow(source, rowNum, s);
}

> Hi syncfusion,
>
> I have been much helped from your datagrid FAQ for windows forms.
>
> I downloaded datagridtextboxcombo_vb.zip and am attempting to use the class in a new project I am working on. I set up some properties to set up the combobox with a dataset and set the display/value members. When I run it from my user control (instead of a form), I am getting some looping on the edit sub and also on a new row, the is setting the edit on the previous row and then erroring with "the ListManager's position must be equal to rowNum. Parameter name: rowNum.
>
> Any help you can give in resolving this error would greatly appreciated!
>
> Thanks in advance,
> Suzanne
>

[Chris Thomas]

Hey I am having the same problem.
The ComboBoxColumn works fine in one grid, but not at all in another.

I tried your suggestion, testing if Source.Position == rowNum before calling SetColumnValueAtRow but now it just never commits the value.

Any help or suggestion would be greatly appriciated

[appsupp]

many tanks anon. a brilliant workaround - succinct in its simplicity. I thought - yeah trap the error but loose the update - however it worked for me - bypassing SetColomnValueAtRow () and allowing GridColumnStyle.Add (CustomDataGridColumnStyle) to do the update...

>In the ComboBoxColumn class, at the end of the SetColomnValueAtRow function, encapsulate the last call like so:
>if(source.Position == rowNum)
> {
> base.SetColumnValueAtRow(source, rowNum, s);
> }
>
>
> > Hi syncfusion,
>>
>> I have been much helped from your datagrid FAQ for windows forms.
>>
>> I downloaded datagridtextboxcombo_vb.zip and am attempting to use the class in a new project I am working on. I set up some properties to set up the combobox with a dataset and set the display/value members. When I run it from my user control (instead of a form), I am getting some looping on the edit sub and also on a new row, the is setting the edit on the previous row and then erroring with "the ListManager''s position must be equal to rowNum. Parameter name: rowNum.
>>
>> Any help you can give in resolving this error would greatly appreciated!
>>
>> Thanks in advance,
>> Suzanne
>>
>

[Peter J Novosel]

Hello:
Adding the fix described below does not fix my problem, the Datagrid column style works without fail except if I add a new row to the data grid.
Without the fix I get the error message "The ListManager''s position must be equal to rowNum", with the fix the error is no longer reported but the selected data value from the Combo/List box is not updated in the Grid ?

>In the ComboBoxColumn class, at the end of the SetColomnValueAtRow function, encapsulate the last call like so:
>if(source.Position == rowNum)
> {
> base.SetColumnValueAtRow(source, rowNum, s);
> }
>
>
> > Hi syncfusion,
>>
>> I have been much helped from your datagrid FAQ for windows forms.
>>
>> I downloaded datagridtextboxcombo_vb.zip and am attempting to use the class in a new project I am working on. I set up some properties to set up the combobox with a dataset and set the display/value members. When I run it from my user control (instead of a form), I am getting some looping on the edit sub and also on a new row, the is setting the edit on the previous row and then erroring with "the ListManager''s position must be equal to rowNum. Parameter name: rowNum.
>>
>> Any help you can give in resolving this error would greatly appreciated!
>>
>> Thanks in advance,
>> Suzanne
>>
>