DataGridView ComboBoxColumn problem

[DominicHelen]

I made a windows application with c#. I have a datagridview with two DatagridviewCom boBoxColumn, Category and subCategory both of these two columns get their drop down list with Column.Items.Ad d(,.....). I did not use databinding since my user need to type free text which is not in the list .

Now I need to let user click on Category column and to get corresponding subCategory list. I know there is some discusstion on <Link Removed>. But I can not use databinding since my user want to type free text. So what I can I do? I did try to use CellBeginedit and CellEndEdit and in those event, instead of use "datasource ".. I use column.Items.Ad d... and coulum.Items.Re move...,, But i keep get dataerror " System.Argument ExceptionataGri dViewComboBoxCe ll value is not valid." Can someone help me on this?



Thanks !



Helen

[Frinavale]

I made a windows application with c#. I have a datagridview with two DatagridviewCom boBoxColumn, Category and subCategory both of these two columns get their drop down list with Column.Items.Ad d(,.....). I did not use databinding since my user need to type free text which is not in the list .

Now I need to let user click on Category column and to get corresponding subCategory list. I know there is some discusstion on <Link Removed>. But I can not use databinding since my user want to type free text. So what I can I do? I did try to use CellBeginedit and CellEndEdit and in those event, instead of use "datasource ".. I use column.Items.Ad d... and coulum.Items.Re move...,, But i keep get dataerror " System.Argument ExceptionataGri dViewComboBoxCe ll value is not valid." Can someone help me on this?



Thanks !



Helen

Helen, please refrain from posting links to forums which are in competition with theScripts.

For some reason I'm not clear on what you're trying to do.
How are you filling your DataGrid without using DataBind?

Could you explain the problem again and post a snippet of code you think is causing the error?

Thanks,

-Frinny

[preeethi]

Hi Helen,
I had the same problem. I found a way out just now.
see my thread

Hope that helps,
Preethi

I made a windows application with c#. I have a datagridview with two DatagridviewCom boBoxColumn, Category and subCategory both of these two columns get their drop down list with Column.Items.Ad d(,.....). I did not use databinding since my user need to type free text which is not in the list .

Now I need to let user click on Category column and to get corresponding subCategory list. I know there is some discusstion on <Link Removed>. But I can not use databinding since my user want to type free text. So what I can I do? I did try to use CellBeginedit and CellEndEdit and in those event, instead of use "datasource ".. I use column.Items.Ad d... and coulum.Items.Re move...,, But i keep get dataerror " System.Argument ExceptionataGri dViewComboBoxCe ll value is not valid." Can someone help me on this?



Thanks !



Helen

[DominicHelen]

Thanks, Preethi. I do appreciate your help. It seems that we had the same problem. But I wonder if you change to "
CategoryCol.Dat aSource = catBS;
CategoryCol.Dis playMember = "Name";
CategoryCol.Val ueMember = "ID";
" and the subCategorycol simliar. Can you add new value in your CategoryCol? I mean can you let user type something which is not in the drop down list? Because I have a event "CellValidateEv ent" to handle add new value like this:
if (!CategoryCol.I tems.Contains(e .FormattedValue )
{
CategoryCol.Ite ms.Add(e.Format tedValue); }

If I use databinding for CategoryCol, the above code will complain. How do you fix this?

Thanks in advance!


Helen

Hi Helen,
I had the same problem. I found a way out just now.
see my thread

Hope that helps,
Preethi