我快要放弃了。我一直在尝试将这个DataGridComboBoxColumn绑定到DataGrid的DataContext(一个DataSet),但我不能。代码如下所示:
UserControl C#:
private static String strDBPath = EMS.Properties.Settings.Default.DBFile;
private static OleDbConnection myConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + strDBPath + ";Jet OLEDB:Engine Type=5");
private static string strProp = "SELECT * FROM tblProperties";
private static OleDbDataAdapter adapterProp = new OleDbDataAdapter(strProp, myConn);
private static DataSet dsProp = new DataSet();
public ObservableCollection<string> VarTypes { get; set; }
public UserControlPropertiesAccess() {
VarTypes = new ObservableCollection<string>() { "N", "Bool", "A2", "A4", "A8", "A20", "A50", "A100", "A200", };
InitializeComponent();
DatabaseHandling.CreateTable("tblProperties");
adapterProp.Fill(dsProp, "LoadDataBindingProp");
dgProperties.DataContext = dsProp;
}
在dsProp中,我有以下字段:PropID,PropName,PropVarType和PropUnit。我使用绑定来显示我的DataGrid中其他列中的最后三个字段,一切正常。当我尝试使用DataGridComboBoxColumn时,它只是不绑定到DataContext。我只设法将我的ObservableCollection作为我的组合框项目。
XAML:
<DataGrid Name="dgProperties" Grid.Column="1" Grid.Row="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="LightCyan" Style="{StaticResource AzureDataGrid}" AutoGenerateColumns="False" CanUserAddRows="False" SelectionMode="Single" ItemsSource="{Binding Path=LoadDataBindingProp}" IsReadOnly="True" SelectionChanged="dgProperties_SelectionChanged">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Path=PropName, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Header="Property" Width="150" />
<DataGridComboBoxColumn x:Name="dgcmbProperties" SelectedItemBinding="{Binding Path=PropName, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Header="Variable" Width="80" />
<DataGridTextColumn Binding="{Binding Path=PropUnit, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Header="Unit" Width="100" />
</DataGrid.Columns>
</DataGrid>
用户完成编辑后,我使用以下方法将数据上传到我的数据库:
private void btnSaveProperty_Click(object sender, RoutedEventArgs e)
{
myConn.Open();
adapterProp.Update(dsProp.Tables[0]);
myConn.Close();
}
所以我都希望将我的DataGridComboBoxColumn绑定到我的DataSet。此外,所选项目未显示在DataGrid单元格中。
任何帮助将非常感谢。
您没有为DataGridComboBoxColumn设置ItemsSource
我想你的主视图模型(主窗口的DataContext)有一个包含所有组合框项目的集合(如MyComboItems)
那应该工作:
<Window x:Name="root">
<DataGrid ItemsSource="{Binding Path=LoadDataBindingProp}">
<DataGrid.Columns>
<DataGridComboBoxColumn x:Name="dgcmbProperties" Header="Variable"
ItemsSource="{Binding
ElementName=root,
Path=DataContext.MyComboItems}"
SelectedItemBinding="{Binding
Path=PropName,
Mode=TwoWay,
UpdateSourceTrigger=PropertyChanged}"/>
</DataGrid.Columns>
</DataGrid>
</Window>