Datagrid templatecolumn更新源触发器显式仅更新第一行

我的XAML：

我的学生管理课程：

 public class StudentManagement:INotifyPropertyChanged { private string StudId; public bool Check { get; set; } public int ID { get; set; } public string StudentID { get { return StudId; } set { StudId = value; PropertyChanged(this, new PropertyChangedEventArgs("StudentID")); } } public string FirstName { get; set; } public string LastName { get; set; } public string Gender { get; set; } public string Birthdate { get; set; } public string MobileNumber { get; set; } public string Year { get; set; } public string Section { get; set; } public string Department { get; set; } public string Course { get; set; } public string Semester { get; set; } public List AccessLevel { get; set; } public string AccessLevels { get; set; } public bool SetTime { get; set; } public string StartDate { get; set; } public string Expiration { get; set; } public event PropertyChangedEventHandler PropertyChanged = delegate { }; } 

示例代码：

 public ObservableCollection StudentManagements { get; set; } 

临时列表（我实际上只是测试一下）

 StudentManagements = new ObservableCollection(); List AccessLevel = new List(); AccessLevel.Add("a"); AccessLevel.Add("b"); AccessLevel.Add("c"); AccessLevel.Add("d"); AccessLevel.Add("e"); StudentManagements.Add(new SM() { StudentID = "1111", AccessLevel = AccessLevel, AccessLevels = "a,c", Birthdate = "1/1/1993", Course = "", Department = "", Expiration = "1/1/1993", FirstName = "", Gender = "Male", LastName = "", MobileNumber = "09497740052", Section = "", Semester = "1st", StartDate = "1/1/1993", Year = "2nd", SetTime = true, ID = 1 }); StudentManagements.Add(new SM() { StudentID = "2222", AccessLevel = AccessLevel, AccessLevels = "e,d", Birthdate = "1/1/1992", Course = "", Department = "", Expiration = "1/1/1992", FirstName = "", Gender = "Male", LastName = "", MobileNumber = "09497740052", Section = "", Semester = "1st", StartDate = "1/1/1994", Year = "2nd", SetTime = true, ID = 1 }); 

显式UpdateSource的按钮只更新第一行而不是所有已编辑的行（请注意，我只测试它，这就是为什么我只在一列上尝试过这个）：

 x = FindChild(AccessGrid, "StudentIdTextBox"); BindingExpression a = x.GetBindingExpression(TextBox.TextProperty); a.UpdateSource(); 

我从这个人FindChild得到了FindChild

我几乎和这个家伙有同样的问题，但是没有人回答他的问题： 同样问题的家伙

然后我只需通过按钮刷新它们：

 AccessGrid.ItemsSource = null; AccessGrid.ItemsSource = StudentManagements; 

现在，它工作了一点，我的updatesourcetrigger属性设置为显式，所以我可以保存更改一旦我单击按钮，但只有第一行得到更新，有没有其他方法来显式更新sourcetrigger属性？

Answer 1

借助一个小方法来查找所有可视后代（=从模板定义实例化的框架元素）和一些用于检查后代的Linq函数是具有给定名称的文本框，您可以显式更新Visual Tree中所有行的绑定。

这是帮手：

 public static class VisualTreeHelperExtension { struct StackElement { public FrameworkElement Element { get; set; } public int Position { get; set; } } public static IEnumerable FindAllVisualDescendants(this FrameworkElement parent) { if (parent == null) yield break; Stack stack = new Stack(); int i = 0; while (true) { if (i < VisualTreeHelper.GetChildrenCount(parent)) { FrameworkElement child = VisualTreeHelper.GetChild(parent, i) as FrameworkElement; if (child != null) { if (child != null) yield return child; stack.Push(new StackElement { Element = parent, Position = i }); parent = child; i = 0; continue; } ++i; } else { // back at the root of the search if (stack.Count == 0) yield break; StackElement element = stack.Pop(); parent = element.Element; i = element.Position; ++i; } } } } 

在按钮单击中，只需要调用帮助器：

 private void Button_Click(object sender, RoutedEventArgs e) { // to check : MessageBox.Show(StudentManagements[1].StudentID.ToString()); var textboxes = AccessGrid.FindAllVisualDescendants() .Where(elt => elt.Name == "StudentIdTextBox" ) .OfType(); foreach (var textbox in textboxes) { BindingExpression binding = textbox.GetBindingExpression(TextBox.TextProperty); binding.UpdateSource(); } // to check : MessageBox.Show(StudentManagements[1].StudentID.ToString()); } 

它应该有所帮助，祝你好运