How to change Datagrid column width???

[Reinier van de Wetering]

I'm trying this code, but I get the error :" Object reference not set to an instance of an object". The code: // Create new Table Style DataGridTableStyle ts = new DataGridTableStyle(); ts.MappingName = "Employees"; this.dataGrid1.TableStyles.Clear(); this.dataGrid1.TableStyles.Add(ts); // Assign New Width to DataGrid column this.dataGrid1.TableStyles["Employees"].GridColumnStyles["EmployeeName"].Width = newwidth; I set the DataSource for the Datagrid to dataset.Employees on the DataGrid Properties. Does anyone know what I'm doing wrong or what I could try??

[Heath Stewart]

You actually have to add a new DataGridColumnStyle before you can refer to it. If you step through your code in the debugger, you'll notice that .GridColumnStyles["EmployeeName"] name is null - you never created such a column. You have to create all the DataGridColumnStyles you want mapped, the DataGridTableStyle, add the columns to the table style's GridColumnStyles collection property, then add the table to the DataGrid's TableStyles collection property.

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