取消视频转换

时间:2013-08-06 15:55:58

标签: c# visual-studio vsto powerpoint

我开发了一个PowerPoint插件,可将当前打开的演示文稿转换为.wmv文件。

这一切都很好用。当演示文稿转换时,我可以在PowerPoint底部看到一个进度条以及一个红色的X,可以按下该X来取消转换过程。

有没有办法以编程方式调用此取消按钮?

这是我用来调用它并等待它完成的代码,但我也希望能够在它正在进行时取消它。

private void frmUpload_Load(object sender, EventArgs e)
    {
        try
        {
            progressBarUpload.Value = 0;
            string exportName = "video_of_presentation";
            string exportPath = @"C:\Windows\Temp\{0}.wmv";

            // Export the currently open presentation
            Microsoft.Office.Interop.PowerPoint.Application ppApplication = null;
            ppApplication = new Microsoft.Office.Interop.PowerPoint.Application();
            ppApplication.Activate();
            ppApplication.ActivePresentation.SaveAs(String.Format(exportPath, exportName), Microsoft.Office.Interop.PowerPoint.PpSaveAsFileType.ppSaveAsWMV);
            lblUploadStatus.Text = "Status: Converting …";

            new Thread(() =>
            {
                Thread.CurrentThread.IsBackground = true;
                /* run your code here */
                do
                {
                    System.Threading.Thread.Sleep(500);

                }
                while (ppApplication.ActivePresentation.CreateVideoStatus != Microsoft.Office.Interop.PowerPoint.PpMediaTaskStatus.ppMediaTaskStatusDone);

                backgroundWorker.RunWorkerAsync();

                SetControlPropertyValue(lblUploadStatus, "text", "Status: Uploading …");

            }).Start();
        }
        catch
        {
            lblUploadStatus.Text = "Status: Error Converting File.";
        }
    }

非常感谢任何帮助。

崔佛

1 个答案:

答案 0 :(得分:0)