Populating choices into ComboBox

[Claude]

I have a grid with column6 being a combobox.   Using Q212 c#.  I want to programmatically load vaules into the combobox during form load.  I cannot seem to find a method to do this.  I see examples when one is creating the column on the fly, but my columns are already defined.  Also how do select a default value to show in the combobox. 

I also want to have another column in the same grid to be a calculation based on other cells in the same row.   How do I go about that?


Why won't this code fill a gridview that has 4 decimal controls?

decimal[] row31 = new decimal[] { 1, 120, 1000, 100 };

decimal[] row32 = new decimal[] { 2, 120, 1000, 100 };

decimal[] row33 = new decimal[] { 3, 120, 1000, 100 };

object[] rows3 = new object[] { row31, row32, row33 };

foreach (decimal[] rowArray in rows3)

{

radGridView1.Rows.Add(rowArray);

}

Thanks in advance.

[Svett]

Hi Claude,

Thank you for writing.

GridViewComboBox column has a DataSource property where you can assign the desired source. This way all cells in this column will use this data source. A sample is available here: http://www.telerik.com/help/winforms/gridview-columns-gridviewcomboboxcolumn.html.

On the other hand if you want to change the data source of the editor, you can do that by using the CellEditorInitialized event. Note that you should have a data source that contains all values in the column, which should be assigned to the DataSource property of GridViewComboBoxColumn. You can use the following code snippet:

void radGridView1_CellEditorInitialized(object sender, Telerik.WinControls.UI.GridViewCellEventArgs e)
{
    if (e.Column.Name == "YourComboBoxColumn")
    {
        RadDropDownListEditor editor = e.ActiveEditor as RadDropDownListEditor;
        RadDropDownListEditorElement element = editor.EditorElement as RadDropDownListEditorElement;
        element.DataSource = yourDataSource;
    }
}

Regarding column calculation, you can use expression column. You can read more about that in the online documentation.

I hope that you find this information useful.

Regards,
Svett
the Telerik team

[Claude]

I am still having issues. I wish to populate the following values into the combobox in index 6. This column is already created during design time.
new string [] {"Sine", "Square", "Sawtooth", "User Definded"};

The online example shows GridViewComboBoxColumn, but that is not available.

I have been trying to use DataGridViewComboBoxColumn

[Svett]

Hi Claude,

If you want to define the data source of the GridViewComboBoxColumn programmatically, you should use the following code snippet:

GridViewComboBoxColumn comboBoxColumn = this.radGridView1.Columns[0] as GridViewComboBoxColumn;
comboBoxColumn.DataSource = new string[] { "Sine", "Square", "Sawtooth", "User Defined" };

You should not use DataGridViewComboBoxColumn. This type is used by the Microsoft DataGridView.

Greetings,
Svett
the Telerik team

[Claude]

I am using the latest version of winforms and it does not allow the use of  GridViewComboBoxColumn  - States there is a refernce missing, but Telerik.WinControls.GridView is referenced.

[Stefan]

Hi Claude,

The column at hand is located at the following namespace:

Telerik.WinControls.UI

I hope this helps.
 
All the best,
Stefan
the Telerik team