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Computed Column in GridGroupingControl

Thread ID:





33912 Aug 29,2005 06:27 PM UTC Aug 30,2005 05:38 PM UTC WinForms 7
Tags: GridControl
Asked On August 29, 2005 06:27 PM UTC

I have a GridGroupingControl whose datasource contains three hierarchical tables, "Employees", "Orders", and "Details". In the Details table, there are columns for "Code" and "Units". I would like to add a new column at runtime, "Fee", which is computed from Code and Units by calling a function Adjust(Code, Units), which is just a simple C# method. Is it possible to do this in a GGC, or do I need to do the "Adjust" calcuation before the datasource is filled, i.e., in a stored procedure? Van Baker

Administrator [Syncfusion]
Replied On August 29, 2005 06:43 PM UTC

There are a couple of ways to do this. The most straight-forward way is to add an unbound field to the grouping grid. In the QueryValue event handler, call your function that does the computation you want. Here is a KB on adding an unbound checkbox. You can add a Static cell for your computation in the same manner. But instead of getting the value from the hashtable as in the KB, you would call your function. http://www.syncfusion.com/support/kb/grid/Default.aspx?ToDo=view&questId=293

Replied On August 29, 2005 09:51 PM UTC

Thanks, Clay. That works great. Only one slight problem is with formatting the new cell. Id like to force money-type formatting and using the following does not seem to work. (If the Fee is a whole number, the value is displayed without any decimal point): this.gridGroupingControl1.GetTableDescriptor("Details").Columns["Fee"].Appearance.AnyRecordFieldCell.Format = "##.00"; How should I do this? --Van Baker

Administrator [Syncfusion]
Replied On August 29, 2005 11:31 PM UTC

For AnyRecordFieldCell.Format to work, AnyRecordFieldCell.CellValueType must also be set to something like typeof(double). Is this being done?

Administrator [Syncfusion]
Replied On August 30, 2005 01:44 PM UTC

Yes, I am setting the type of the unbound column ("Fee") to double. Here is the code I am using: this.gridGroupingControl1.GetTableDescriptor("Details").UnboundFields.Add("Fee"); this.gridGroupingControl1.GetTableDescriptor("Details").Columns["Fee"].Appearance.AnyRecordFieldCell.CellValueType = typeof(double); this.gridGroupingControl1.GetTableDescriptor("Details").Columns["Fee"].Appearance.AnyRecordFieldCell.Format = "##.000"; For the unbound column, it''s like the format specification has no effect, whereas, for other columns in the same table it works fine. --Van Baker

Administrator [Syncfusion]
Replied On August 30, 2005 02:45 PM UTC

Instead of this.gridGroupingControl1.GetTableDescriptor("Details").Columns["Fee"].Appearance.AnyRecordFieldCell.Format = "##.000"; try this: this.gridGroupingControl1.GetTableDescriptor("Details").Columns["Fee"].Appearance.RecordFieldCell.Format = "##.000"; this.gridGroupingControl1.GetTableDescriptor("Details").Columns["Fee"].Appearance.AlternateRecordFieldCell.Format = "##.000";

Replied On August 30, 2005 04:39 PM UTC

I tried that but it still does not work for me. I also tried specifying the CellValueType for the RecordFieldCell and AlternateRecordFieldCell. Still no joy. --Van Baker

Administrator [Syncfusion]
Replied On August 30, 2005 05:38 PM UTC

It looks like to me the CellValueType is not getting propagated properly. As a work around until we get this addressed in our code, you can handle the TableControlDrawCellDisplayTest and explicitly format the cell there. Here is a little sample. http://www.syncfusion.com/Support/user/uploads/GGC_unboundCol_d2dbfd63.zip


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