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How do I...?

DataGridView wo...

DataGridView woes

8/15/2008 12:42:11 PM

DominionZA

18 posts

DataGridView woes

Hi all,

I am having a problem getting the DataGridView to listen to me. No matter what I do with column layout, the grid ignores me and simply auto creates columns when I databind.

Code...

grid.Columns.Clear();

// At this point, there are zero columns. 100%.

// Now creating one single column, just to test how this works.
Gizmox.WebGUI.Forms.DataGridViewColumn col = new DataGridViewColumn();
col.AutoSizeMode = Gizmox.WebGUI.Forms.DataGridViewAutoSizeColumnMode.NotSet;
col.DataPropertyName = "UserCode";
col.DefaultHeaderCellType = typeof(Gizmox.WebGUI.Forms.DataGridViewColumnHeaderCell);
col.Name = "UserCode";
col.Resizable = Gizmox.WebGUI.Forms.DataGridViewTriState.NotSet;
col.SortMode = Gizmox.WebGUI.Forms.DataGridViewColumnSortMode.Automatic;
col.Width = 100;

grid.Columns.Add(col);

// Grid now reflects that there is just ONE column. 100%.

// Lets bind the data.
DAL.VwCallsCollection calls = new Smartec.SmartLog.DAL.VwCallsCollection();
if (StatusComboBox.SelectedIndex == 0)
calls.Where(DAL.VwCalls.Columns.StatusID, SubSonic.Comparison.In, new ArrayList() { 1, 2, 3, 4, 5, 6 });
else
calls.Where(DAL.VwCalls.Columns.StatusID, StatusComboBox.SelectedValue);

calls.Load();

// This is where I am getting frustrated...
grid.DataSource = calls;
// grid.Columns.Count == 23 now. Why? I cleared all columns and manually added one. Why does the grid auto generate the columns? How do I turn this "feature" off? I want the control over column generation.

TIA

8/15/2008 3:15:53 PM

palli

628 posts

Re: DataGridView woes

There is a DGV.AutoGenerateColumns = False that you should try.

The default value seems to be True, and DGV created in the designer does not add this to the generated code.

When created in designer, I usually put this line in manually, after the designer has generated it's code, and after that it seems to stick.

Palli

8/15/2008 3:44:55 PM

DominionZA

18 posts

Re: DataGridView woes

Thanks Palli. I found it in code eventually and doing the same as you. Strange that the property is not exposed in the designer.

Another question... If I can put it here.

I want to be able to set row colors based on the data that is bound to the row. But it is not working.

I have tried setting Row.DefaultCellStyle.BackColor = ... in both the DataBindingComplete and the RowsAdded events, but no change.
Any ideas? To set either an individual cell BackColor or the entire row. Will be happy with either.

TIA

8/15/2008 3:52:10 PM

palli

628 posts

Re: DataGridView woes

There is supposed to be an active issue about the AutoGenerateColumns and exposing it in designer. I have not seen it, but one of the core team member said that one of the developer was currently working on it.

As for coloring, I have done that sucessfully by handling the CellValueChanged event, in which case you set:
DGV.Rows(e.RowIndex).DefaultCellStyle.BackColor = Drawing.Color.Lime or something

That handles changes done interactively. For preloaded data, that's not enough and you have to handle the CellFormatting event, in which case you set:
e.CellStyle.BackColor = Drawing.Color.Lime or some color.

Hope this helps,
Palli

8/15/2008 3:54:25 PM

DominionZA

18 posts

Re: DataGridView woes

Thanks again Palli...

What I did discover, is my coloring works 100% if I render the form as a .wgx. If I render as .swgx then it does not do coloring and ignores my code outright.

Will play with your suggestions now and see what I come up with. Thanks again...

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