wpf 创建 GridView 时“必须在与 DependencyObject 相同的线程上创建 DependencySource”
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原文地址: http://stackoverflow.com/questions/12554612/
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"Must create DependencySource on same Thread as the DependencyObject" When Create GridView
提问by teardrop
I have a problem with thread.When I want set a GridView into a ListView as View in another thread.It display a message which said:
我的线程有问题。当我想将 GridView 设置为 ListView 作为另一个线程中的视图时。它显示一条消息：
Must create DependencySource on same Thread as the DependencyObject.
必须在与 DependencyObject 相同的线程上创建 DependencySource。
// Create grid view
GridView grid = new GridView();
// Add column
// Name
grid.Columns.Add((GridViewColumn)myresourcedictionary["gridDirFileName"]);
// Type
grid.Columns.Add((GridViewColumn)myresourcedictionary["gridDirFileType"]);
// Data Modified
grid.Columns.Add((GridViewColumn)myresourcedictionary["gridDirFileDataModified"]);
// Size
grid.Columns.Add((GridViewColumn)myresourcedictionary["gridDirFileSize"]);
// Edit view
Application.Current.Dispatcher.Invoke(new Action(() => ListViewOp.View = grid));
What am I doing?
我在做什么？
回答by Rohit Vats
As the error says Dependency Property and its corresponding binding have to be created on same thread. It can't be set on different threads. Put the creation of grid on UI dispatcher too. Since your ListView ViewDP is created on UI thread, hence its source property i.e. GridViewshould also be on UI thread.
正如错误所说Dependency Property and its corresponding binding have to be created on same thread。不能在不同的线程上设置。将网格的创建也放在 UI 调度程序上。由于您的 ListView ViewDP 是在 UI 线程上创建的，因此它的源属性 ieGridView也应该在 UI 线程上。
Application.Current.Dispatcher.Invoke((Action)(delegate
{
GridView grid = new GridView();
grid.Columns.Add((GridViewColumn)myresourcedictionary["gridDirFileName"]);
grid.Columns.Add((GridViewColumn)myresourcedictionary["gridDirFileType"]);
grid.Columns.Add((GridViewColumn)myresourcedictionary["gridDirFileDataModified"]);
grid.Columns.Add((GridViewColumn)myresourcedictionary["gridDirFileSize"]);
ListViewOp.View = grid
}));
