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Question

实际上，我需要提示加载图像throwugh backgrounderworker，每当调用特定函数时，这里就是我的代码：

 private void bgwFile_DoWork(object sender, DoWorkEventArgs e)
 {
        FormFieldsLoad();      
 }

private void bgwFile_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    if (e.Cancelled == true)
    {
        Status.Text = "cancelled";
    }
    else if (e.Error != null)
    {
    }

    picprocess.SendToBack(); 
    Status.Text = "Completed";         
}

 //Below Method where i have called RunWorkerAsync()
private void buttonUpload_Click(object sender, EventArgs e)
{
    LoadFile(pdfFullPath, txtPassword.Text);
    form = document.getDocumentCatalog().getAcroForm();
    java.util.List FieldTypes = form.getFields();
    availableFieldsTable.Clear();
    btnLoad.Enabled = false;     
    Status.Text = "Document loaded successfully!!!";

    picprocess.BringToFront();  
    bgwFile.RunWorkerAsync();
}

在运行上述代码时，它调用加载图像但没有显示输出它继续显示加载图像..它没有调用 RunWorkerCompleted

任何人都可以帮助我吗？

谢谢

Answer 1

您是否分配了事件处理程序？

bwgFile.DoWork += bgwFile_DoWork;
bwgFile.RunWorkerCompleted += bgwFile_RunWorkerCompleted;

你确定FormFieldsLoad终止？

Answer 2

As @Rik said, have you assigned the event handler?

If you have, put a break point or other trace to verify that your bgwFile_DoWork method execute as you expect and aren't getting stuck in an infinite loop or something.

Answer 3

DoWork 真的完成了吗？此代码会在输出窗口中打印任何内容吗？

 private void bgwFile_DoWork(object sender, DoWorkEventArgs e)
 {
        FormFieldsLoad();      
        Console.WriteLine("Work done");
 } // <-or put a breakpoint here