Silverlight: How to force binding after setting the DataContext property

问题

Is it possible to set the DataContext property of a usercontrol after the user control has been loaded, and force the usercontrol to rebind?

回答1:

I'm pretty sure that if you just set the datacontext again, it will rebind

回答2:

If you need to do extra work when the DataContext changes you can use a custom DependencyProperty and bind it to the DataContext property. Use the DependencyPropertyChangedEventHandler to know when the DP changed.

For a more complete explanation see my blog post at http://msmvps.com/blogs/theproblemsolver/archive/2008/12/29/how-to-know-when-the-datacontext-changed-in-your-control.aspx.

回答3:

Setting the DataContext property should cause the rebind.

回答4:

Another way to force re-binding, for example:

MyDataGrid.SetBinding(DataGrid.ItemsSourceProperty, 
    MyDataGrid.GetBindingExpression(DataGrid.ItemsSourceProperty).ParentBinding);

This method could be used for DataContext as well.

来源：https://stackoverflow.com/questions/369873/silverlight-how-to-force-binding-after-setting-the-datacontext-property