Question

I have a "List" in the main application and I am trying to access its elements from within a thread. I am getting this exception: {"The calling thread cannot access this object because a different thread owns it."} System.SystemException {System.InvalidOperationException}

Answer 1

DispatcherOperation d = myListBox.Dispatcher.Invoke(DispatcherPriority.Normal, new Action(() => 
{ 
    // access your listbox and return something
}));

然后要求您的派遣行动达到回报价值。

myValue = d.Result; //Result is of type Object

Answer 2

您可以通过宣布代表而使用交叉口。

private delegate void thread_delegate();

从而形成一种方法,使你能够查阅你的名单。

private void SampleMethod()
{
....
}

then create a method for your thread. Inside that method invoke your method whick

private void ThreadMethod()
{

           thread_delegate d = new thread_delegate(SampleMethod);
            d.Invoke();
}

在你的发言中,你 create了......

 Thread t = new Thread(new ThreadStart(ThreadMethod));    
 t.Start();

Answer 3

你们正试图从一个非“倡议”的深处进入“倡议”。

阅读:

http://www.switchonthecode.com/tutorials/working-with-the-wpf-dispader” rel=“nofollow noreferer” http://www.switchonthecode.com/tutorials/working-with-the-wpf-disTOP/a。

Answer 4

Try this.
MylistBox is a ListBox

namespace TEST
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Thread th = new Thread(AccessList);
            th.Start(MylistBox);
        }

        void AccessList(Object O)
        {
            ListBox lBox = O as ListBox;
            for (int i = 0; i < lBox.Items.Count; i++)
            {
                MessageBox.Show(lBox.Items[i].ToString());
            }
        }
    }
}

友情链接