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[ Team LiB ] Recipe 7.10 Creating Custom Columns in a Windows Forms DataGrid Problem You need to create a DataGrid having columns with custom formatting and attributes. Solution Use the DataGridTableStyle class. The sample code contains two event handlers | Team LiB Recipe 7.10 Creating Custom Columns in a Windows Forms DataGrid Problem You need to create a DataGrid having columns with custom formatting and attributes. Solution Use the DataGridTableStyle class. The sample code contains two event handlers Form.Load Sets up the sample by creating a DataAdapter and using it to fill a DataTable with data from the ProductID ProductName and Discontinued columns of the Products table in the Northwind database. The DataGridTableStyle class is used to define a data grid containing three custom columns two text boxes and one check box corresponding to the ProductID ProductName and Discontinued columns. Finally the default view of the Products DataTable is bound to the data grid on the form. Update Button.Click Uses the DataAdapter created in the Form.Load event handler to update changes made to the Products DataTable back to the database. The C code is shown in Example 7-18. Example 7-18. File CustomColumnsInDataGridForm.cs Namespaces variables and constants using System using System.Configuration using System.Windows.Forms using System.Data using System.Data.SqlClient private SqlDataAdapter da private DataTable dt . . . private void CustomColumnsInDataGridForm_Load object sender System.EventArgs e Create the DataAdapter. String selectCommand SELECT ProductID ProductName Discontinued FROM Products da new SqlDataAdapter selectCommand ConfigurationSettings.AppSettings S ql_ConnectString Use CommandBuilder to handle updates back to the data source. SqlCommandBuilder cb new SqlCommandBuilder da Retrieve the table schema. dt new DataTable Products da.FillSchema dt SchemaType.Source Default the check box column to false. dt.Columns Discontinued .DefaultValue false Fill the table. da.Fill dt Define the table for the grid. DataGridTableStyle ts new DataGridTableStyle ts.MappingName Products Define and add the columns to the grid. DataGridTextBoxColumn productIDCol new DataGridTextBoxColumn productIDCol.MappingName ProductID .
