Visual Basic, DataGrid "Column Not Found" error

Jupiter
#1 / 3

DataGrid "Column Not Found" error

I'm running VB6, ADO to Jet 4.0, and have a grid bound to a
datasource. Now I add an extra column, unbound, programatically with
DataGrid.Columns.Add(index) and it appears to work when I run a
report. The new column is visible. I even can set the Caption for the
new column and it appears in the column heading in the report. All
appears fine until I try to put some data in the cells for the new
columm. At runtime, as soon as my code tries to add Values to the
cells I get a "Column not Found" error. I try typing some data in the
cells and I get the same error when I hit Enter. Is the column R/O
somehow?

Grid properties:
1. Visible=True
2. Enabled=True
3. Allow Update = True
4. Allow Delete = True
5. Allow Add New = True

The code:

Dim ColumnCount As Integer

ColumnCount = grdReportsGrid.Columns.Count
grdReportsGrid.Columns.Add (ColumnCount)
grdReportsGrid.Columns(ColumnCount).Caption = "Total"
grdReportsGrid.Columns(ColumnCount).Locked = False
grdReportsGrid.Columns(ColumnCount).Visible = True

For i = 0 To grdReportsGrid.ApproxCount - 1
grdReportsGrid.Row = 0 + i
Sum = Sum + grdReportsGrid.Columns(0).Value
grdReportsGrid.Columns(ColumnCount).Value = Sum <-------bombs
here

Thanks for any help you can give me. Paul

Sat, 30 Jul 2005 13:08:49 GMT

D..
#2 / 3

DataGrid "Column Not Found" error

Could it be a misguided error message and that it is trying to update a record column that doesn't exist in the database..
Just a guess on my part. I don't use bound controls...

Quote:

>I'm running VB6, ADO to Jet 4.0, and have a grid bound to a
>datasource. Now I add an extra column, unbound, programatically with
>DataGrid.Columns.Add(index) and it appears to work when I run a
>report. The new column is visible. I even can set the Caption for the
>new column and it appears in the column heading in the report. All
>appears fine until I try to put some data in the cells for the new
>columm. At runtime, as soon as my code tries to add Values to the
>cells I get a "Column not Found" error. I try typing some data in the
>cells and I get the same error when I hit Enter. Is the column R/O
>somehow?

>Grid properties:
>1. Visible=True
>2. Enabled=True
>3. Allow Update = True
>4. Allow Delete = True
>5. Allow Add New = True

>The code:

> Dim ColumnCount As Integer

> ColumnCount = grdReportsGrid.Columns.Count
> grdReportsGrid.Columns.Add (ColumnCount)
> grdReportsGrid.Columns(ColumnCount).Caption = "Total"
> grdReportsGrid.Columns(ColumnCount).Locked = False
> grdReportsGrid.Columns(ColumnCount).Visible = True

> For i = 0 To grdReportsGrid.ApproxCount - 1
> grdReportsGrid.Row = 0 + i
> Sum = Sum + grdReportsGrid.Columns(0).Value
> grdReportsGrid.Columns(ColumnCount).Value = Sum <-------bombs
>here

> Next

>When I step through this I see that "Sum" has the correct value, and
>(ColumnCount) has the correct value (an index of 4 for a fith column.)

>Thanks for any help you can give me. Paul

Have a good day...

Don

Sat, 30 Jul 2005 14:28:47 GMT

Jupiter
#3 / 3

DataGrid "Column Not Found" error

Quote:

> Could it be a misguided error message and that it is trying to update a record column that doesn't exist in the database..
> Just a guess on my part. I don't use bound controls...

Hi Don,
I actually added another column to the table with the appropriate data
type and name, just in case it was trying to do something with the DB.
It did no good, though.

The weird thing is that I can write to the Caption of the column, so
if it doesn't exist, how can I do that? I can write to the Caption
but I can't write a Value. Totally weird. ~Paul

Quote:

> >I'm running VB6, ADO to Jet 4.0, and have a grid bound to a
> >datasource. Now I add an extra column, unbound, programatically with
> >DataGrid.Columns.Add(index) and it appears to work when I run a
> >report. The new column is visible. I even can set the Caption for the
> >new column and it appears in the column heading in the report. All
> >appears fine until I try to put some data in the cells for the new
> >columm. At runtime, as soon as my code tries to add Values to the
> >cells I get a "Column not Found" error. I try typing some data in the
> >cells and I get the same error when I hit Enter. Is the column R/O
> >somehow?

> >Grid properties:
> >1. Visible=True
> >2. Enabled=True
> >3. Allow Update = True
> >4. Allow Delete = True
> >5. Allow Add New = True

> >The code:

> > Dim ColumnCount As Integer

> > ColumnCount = grdReportsGrid.Columns.Count
> > grdReportsGrid.Columns.Add (ColumnCount)
> > grdReportsGrid.Columns(ColumnCount).Caption = "Total"
> > grdReportsGrid.Columns(ColumnCount).Locked = False
> > grdReportsGrid.Columns(ColumnCount).Visible = True

> > For i = 0 To grdReportsGrid.ApproxCount - 1
> > grdReportsGrid.Row = 0 + i
> > Sum = Sum + grdReportsGrid.Columns(0).Value
> > grdReportsGrid.Columns(ColumnCount).Value = Sum <-------bombs
> >here

> > Next

> >When I step through this I see that "Sum" has the correct value, and
> >(ColumnCount) has the correct value (an index of 4 for a fith column.)

> >Thanks for any help you can give me. Paul

> Have a good day...

> Don

Sun, 31 Jul 2005 09:33:21 GMT