c# – 线程池:跨线程操作无效.

当涉及到线程时我很新,但是在使用以下代码时我得到一个InvalidOperationException.我知道它正在尝试访问importFileGridView,但这是由创建异常的UI线程创建的.我的问题是,我该如何解决这个问题? GetAllImports可以有一个返回类型吗?如何从UI线程访问临时文件?

ThreadPool.QueueUserWorkItem(new WaitCallback(GetAllImports), null);

private void GetAllImports(object x)
    {
        DataSet temp = EngineBllUtility.GetAllImportFiles(connectionString);
        if (temp != null)
            importFileGridView.DataSource = temp.Tables[0];
        else
            MessageBox.Show("There were no results. Please try a different search", "Unsuccessful", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }

最佳答案 您无法在后台线程上更改用户界面组件.在这种情况下,必须在UI线程上设置DataSource.

您可以通过Control.Invoke或Control.BeginInvoke处理此问题,如下所示:

private void GetAllImports(object x)
{
    DataSet temp = EngineBllUtility.GetAllImportFiles(connectionString);
    if (temp != null)
    {
        // Use Control.Invoke to push this onto the UI thread
        importFileGridView.Invoke((Action) 
            () => 
            {
                importFileGridView.DataSource = temp.Tables[0];
            });
    }
    else
        MessageBox.Show("There were no results. Please try a different search", "Unsuccessful", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
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