GridDataBoundGrid Inheritance Designer issue

[Krijn Michiels]

Hi,

The GDBG displays all datasource columns by default. When you edit the gridboundcolumns collection there are no columns shown ? Where are the gridboundcolumns displayed ? It would be very easier to edit the list (just put the correct headertext) then to restart with a empty list.

I was thinking of correcting this myself :

1. Overriden DataMember property
2. When changed and in DesignMode
3. Loop all DataColumns in DataSet and add this to the GridBoundColumnCollection (heading = DataColumn.Caption)

This works but the gridcolumns are not serialized on the form.

Any suggestions ?

[Administrator]

If you do not explicitly populate GridBoundColumns, then you can use the grid.Binder.internalColumns collections to set properties, etc.

But if you want to remove columns at runtime, you can use code like this:

GriBoundColumnsCollection gbcc = this.grid.Binder.InternalColumns.Clone() as GriBoundColumnsCollection;
//remove/add GridBoundColumns to gbcc.
//then set them to be the used by the grid.
grid.GridBoundColumns = gbcc;
grid.Binder.InitializeColumns();

[Krijn Michiels]

Thanks,

but how can I populate gridcolumns at runtime through an inherited databoundgrid ?

We use the datacolumn.caption field to store our column description.

[Administrator]

I am not sure I understand. Why can''t you add a method named PopulateGridBoundColumns to the derived grid, and call that from the Load event of whatever form or usercontrol hosts the derived grid?

[Krijn Michiels]

Having (very) much coding to do and lots of grids I don''t think that I want to click thousands of times on gridboundcolumns -> add -> change header text (already have this in DataColumn.Caption) -> ...

Code I''m struggling with :

Sub OnDataMemberChanged()
If not DesignMode then Exit Sub
gridBoundColumns.Clear()
For each dc as DataColumn in Ctype(DataSource,DataSet).Tables(DataMember)
Dim column as new GridBoundColumn
column.MappingName = dc.ColumnName
column.HeaderText = dc.Caption
gridBoundColumns.Add(column)
''...

Next

The changed collection gridBoundColumns is not serialized in the parent form. Guess it has something to do with the PropertyDescriptor.

[Administrator]

If what you want to do is to just display teh caption text as the header text for all columns, then the simplest thing to do is to handleModel.QueryCellInfo and swap the text at that point. Here is a little sample.

http://www.syncfusion.com/Support/user/uploads/GDBG_VB_43760bfd.zip