如何判断DataContext有修改: EF6的 using (var db = new Model1()) { if (db.ChangeTracker.HasChanges()) { Console.WriteLine("Something has changed"); } } EF5中: public bool HasUnsavedChanges() { return this.ChangeTracker.Entries().Any(e => e.State ==
发现了一个问题: QQuickView only supports loading of root objects that derive from QQuickItem. If your example is using QML 2, (such as qmlscene) and the .qml file you loaded has 'import QtQuick 1.0' or 'import Qt 4.7', this error will occur. To load files w