如何在Silverlight DataGrid更新綁定數據時進行更改？

Question

當我離開單元格時，當前我的DataGrid（Silverlight 4）正在更新。每當單元格的值發生更改時，我都需要更新它。

Answer 1

我來到了我自己的答案和它與用於瞬間改變一個TextBox的綁定行爲注射來源（see here）。我subclassed DataGrid並添加了以下代碼：

protected override void OnPreparingCellForEdit(DataGridPreparingCellForEditEventArgs e) 
    { 
     base.OnPreparingCellForEdit(e); 

     TextBox textBox = e.EditingElement as TextBox; 
     if (textBox != null) 
     { 
      textBox.TextChanged -= OnTextChanged; 
      textBox.TextChanged += OnTextChanged; 
     } 

     ComboBox comboBox = e.EditingElement as ComboBox; 
     if (comboBox != null) 
     { 
      comboBox.SelectionChanged -= OnSelectionChanged; 
      comboBox.SelectionChanged += OnSelectionChanged; 
     } 
    } 

    private void OnSelectionChanged(object sender, SelectionChangedEventArgs e) 
    { 
     ComboBox comboBox = sender as ComboBox; 

     if (comboBox == null) 
      return; 

     BindingExpression expression = comboBox.GetBindingExpression(ComboBox.SelectedValueProperty); 
     if (expression != null) 
      expression.UpdateSource(); 

     expression = comboBox.GetBindingExpression(ComboBox.SelectedItemProperty); 
     if (expression != null) 
      expression.UpdateSource(); 
    } 

    private void OnTextChanged(object sender, TextChangedEventArgs e) 
    { 
     TextBox textBox = sender as TextBox; 

     if (textBox == null) 
      return; 

     BindingExpression expression = textBox.GetBindingExpression(TextBox.TextProperty); 

     if (expression == null) 
      return; 

     expression.UpdateSource(); 
    } 

Answer 2

只是在你設置datagrid的itemssource的類上實現INotifyPropertyChanged。

例如

public class CustomType:INotifyPropertyChanged 
{ 

} 

List<CustomType> list=new List<CustomType>(); 

添加項目

datagrid.ItemsSource=list; 

綁定模式=雙向