我有數(shù)據(jù)網(wǎng)格，其中一列是按鈕列，我想將此單擊綁定到視圖模型，但它沒有到達視圖模型功能。<DataGrid CanUserAddRows="False" AutoGenerateColumns="False" ItemsSource="{Binding TableComments}" SelectedItem="{Binding SelectedRow}" x:Name="dataGrid" > <DataGrid.Columns > <DataGridTemplateColumn Header="Delete"> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <Button Command="{Binding DeleteCommentCommand}" >Delete</Button> </DataTemplate> </DataGridTemplateColumn.CellTemplate> </DataGridTemplateColumn> </DataGrid.Columns></DataGrid>在視圖模型中：public ICommand DeleteCommentCommand { get; private set; }public MyViewModel(){ DeleteCommentCommand = new RelayCommand(Delete);}void Delete(){}我感覺問題出在這一行： <Button Command="{Binding DeleteCommentCommand}" >Delete</Button>
1 回答
qq_花開花謝_0
TA貢獻1835條經(jīng)驗 獲得超7個贊
DeleteCommentCommand綁定到 DataGrid item DataContext，而不是 DataGridDataContext本身（ViewModel）。您應該設(shè)置適當?shù)?DataContextCellTemplate或更新一點綁定，例如
Command="{Binding RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}, Path=DataContext.DeleteCommentCommand}"
您還可以更新命令并將參數(shù)傳遞給RelayCommand方法Delete
public MyViewModel()
{
DeleteCommentCommand = new RelayCommand(item => Delete(item));
}
void Delete(object item)
{
}
并在xaml中傳遞值CommandParameter="{Binding}"
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