c#如何设置代码在最后运行

本文关键字：代码 最后 运行 设置 何设置 | 更新日期: 2023-09-27 17:49:37

我需要将代码行设置为在所有内容完成运行后运行。有人知道怎么做吗?

private void ScanBT_Click(object sender, EventArgs e)
        {
            var folder = @"C:'Users'Shen'Desktop'LenzOCR'LenzOCR'WindowsFormsApplication1'ImageFile";
            DirectoryInfo directoryInfo;
            FileInfo[] files;
            directoryInfo = new DirectoryInfo(folder);
            files = directoryInfo.GetFiles("*.jpg", SearchOption.AllDirectories);
            var processImagesDelegate = new ProcessImagesDelegate(ProcessImages2);
            processImagesDelegate.BeginInvoke(files, null, null);

            **//HERE IS THE LINE OF CODE THAT NEED TO BE RUN AFTER EVERYTHING FINISH RUN
            System.IO.File.Delete(@"C:'Users'Shen'Desktop'LenzOCR'TempFolder'tempPic.jpg");**
        }
        private void ProcessImages2(FileInfo[] files)
        {
            var comparableImages = new List<ComparableImage>();
            var index = 0x0;
            foreach (var file in files)
            {
                if (exit)
                {
                    return;
                }
                var comparableImage = new ComparableImage(file);
                comparableImages.Add(comparableImage);
                index++;
            }
            index = 0;
            similarityImagesSorted = new List<SimilarityImages>();
            //MessageBox.Show("here"+singleFileInfo.FullName);
            var fileImage = new ComparableImage(singleFileInfo);
            for (var i = 0; i < comparableImages.Count; i++)
            {
                if (exit)
                    return;
                var destination = comparableImages[i];
                var similarity = fileImage.CalculateSimilarity(destination);
                var sim = new SimilarityImages(fileImage, destination, similarity);
                similarityImagesSorted.Add(sim);
                index++;
            }
            similarityImagesSorted.Sort();
            similarityImagesSorted.Reverse();
            similarityImages = new BindingList<SimilarityImages>(similarityImagesSorted);
            var buttons =
                new List<Button>
                    {
                        ScanBT
                    };
            if (similarityImages[0].Similarity > 70)
            {
                con = new System.Data.SqlClient.SqlConnection();
                con.ConnectionString = "Data Source=SHEN-PC''SQLEXPRESS;Initial Catalog=CharacterImage;Integrated Security=True";
                con.Open();
                String getFile = "SELECT ImageName, Character FROM CharacterImage WHERE ImageName='" + similarityImages[0].Destination.ToString() + "'";
                SqlCommand cmd2 = new SqlCommand(getFile, con);
                SqlDataReader rd2 = cmd2.ExecuteReader();
                while (rd2.Read())
                {
                    for (int i = 0; i < 1; i++)
                    {
                        string getText = rd2["Character"].ToString();
                        Action showText = () => ocrTB.AppendText(getText);
                        ocrTB.Invoke(showText);
                    }
                }
                con.Close();
            }
            else
            {
                MessageBox.Show("No character found!", "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }

        }

c#如何设置代码在最后运行

如何将删除文件的代码行移动到进程图像方法的末尾?

  • 运行ProcessImages2方法中的代码在BackgroundWorker.DoWork(…)
  • 替换 ProcessImagesDelegate。BeginInvoke(files, null, null) with worker.RunWorkerAsync(…)
  • 捕获事件RunWorkerCompleted并在那里执行File.Delete(…).

这样的话，你的主线程就可以被刷新并被最终用户使用。

如果像下面这样编辑方法，调用将阻塞，直到ProcessImages2完成。

var processImagesDelegate = new ProcessImagesDelegate(ProcessImages2);  
IAsyncResult result = processImagesDelegate.BeginInvoke(files, null, null);
result.AsyncWaitHandle.WaitOne();
**//HERE IS THE LINE OF CODE THAT NEED TO BE RUN AFTER EVERYTHING FINISH RUN   
System.IO.File.Delete(@"C:'Users'Shen'Desktop'LenzOCR'TempFolder'tempPic.jpg");
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