How to Resolve 'Cross-thread operation not valid' Errors in Your Application?

Invalid cross-thread operation

The error message "Invalid cross-thread operation" indicates that the control is being accessed from a thread other than the thread that created the control. This occurs when UI operations are performed on a thread other than the thread that owns the control.

Solution

To resolve this issue, you have two options:

1. Call methods on the UI thread

Create the project on the child thread, then call Control.Invoke() to perform UI operations on the owning thread:

System.Threading.Thread t = new System.Threading.Thread(() =>
{
    // 执行耗时操作
    var items = CreateItems();
    Invoke(new Action(() =>
    {
        // 在 UI 线程上将项目添加到 ListView
        listView1.Items.AddRange(items);
        // 执行其他与 UI 相关的任务
    }));
});

2. Use BackgroundWorker

Alternatively, you can use a BackgroundWorker, which handles threading internally:

BackgroundWorker bw = new BackgroundWorker();
bw.DoWork += (s, e) => { /* 创建项目 */ };
bw.RunWorkerCompleted += (s, e) => { /* 将项目绑定到 UI 元素 */ };
bw.RunWorkerAsync();

Please note that cannot perform UI operations on a thread other than the owning thread. Therefore, be sure to use one of these methods to ensure your UI remains responsive and in sync.

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