WPF AutoGeneratingColumn 绑定下拉框
WPF自动产生列,前台代码:
<DataGrid x:Name="Dg" AutoGenerateColumns="True" CanUserAddRows="False" AutoGeneratingColumn="Dg_OnAutoGeneratingColumn"
DataGrid绑定DataTable
private void TestPage_Loaded(object sender, RoutedEventArgs e) { var dt = new DataTable(); dt.Columns.Add("ID"); dt.Columns.Add("Name"); dt.Columns.Add("gender"); dt.Columns.Add("xAge"); DataRow newRow = dt.NewRow(); newRow["ID"] = "ID"; newRow["Name"] = "Name"; newRow["gender"] = "gender"; newRow["xAge"] = "xAge"; dt.Rows.Add(newRow); Dg.ItemsSource = dt.DefaultView; }
因为数据源不固定(列名、列个数都不固定),所以必须自动生成列,并为每一列绑定下拉框;
下拉框的默认选中项为列的标题。实现字段映射功能
private void Dg_OnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e) { var sexType = new List<string> { "Age", "gender", "ID", "Name","Country" }; var column = new DataGridTemplateColumn { Header = e.PropertyName }; var dataTemplate = new DataTemplate(); var fef = new FrameworkElementFactory(typeof(ComboBox)); var binding = new Binding { Source = sexType }; fef.SetBinding(ItemsControl.ItemsSourceProperty, binding); var selectVal = new Binding(e.PropertyName);//根据列名设置默认值 fef.SetBinding(Selector.SelectedValueProperty, selectVal); dataTemplate.VisualTree = fef; column.CellTemplate = dataTemplate; e.Column = column; e.Column.Width = 100; }
效果图: