WPF 在使用 ItemsSource 之前，项集合必须为空

<DataGrid x:Name="datagrid" ItemsSource="{Binding ElementName=Mwindow, Path=Preson}" Margin="0,0,0,20">
            <DataGrid.Columns>
            <DataGridTextColumn Binding="{Binding Name}" Header="Name"></DataGridTextColumn>
            <DataGridTextColumn Binding="{Binding Address}" Header="Address"></DataGridTextColumn>
            <DataGridTextColumn Binding="{Binding Age}" Header="Age"></DataGridTextColumn>
            </DataGrid.Columns>
        </DataGrid>

DataGridTextColumn  一定要在  <DataGrid.Columns>里

标签：ItemsSource,之前,为空,集合,WPF,DataGridTextColumn
来源： https://www.cnblogs.com/lonelyxmas/p/12075452.html