在填充巨大的TreeView时使用ProgressBar

我正在用大量数据填充树视图，通常程序需要一段时间才能将控制权交还给用户(我想这只是树视图方面的进程太多了(。所以我决定给用户一个进度条来显示一切进展顺利。

在这个树视图中，我选择了一个文件夹，该文件夹中的所有xml文件都将添加到该文件夹中，树视图如下所示：

+ FOLDER NAME 1
|__xml file name 1
|__xml file name 2
+FOLDER NAME 2
|__xml file name 1
|__xml file name 2

所以问题是，我的进度条实际上会比树视图本身完成得快得多，我认为是progam让树视图可见的时候花了必要的时间。我该怎么做？

这是我的代码，用于浏览文件夹并将其传递给一个函数来填充树视图(对不起，它太长了，但我认为它会让它更清楚(正如你所看到的，我希望在向树视图添加节点时，将进度条的50%填充在这一部分，并将其他50%填充在树视图中：

        private void toolStripBrowseDirectory_Click(object sender, EventArgs e)
    {
        //Reset progressbar
        toolStripProgressBar.Value = 0;
        folderBrowser.ShowNewFolderButton = false;
        DialogResult result = folderBrowser.ShowDialog();
        int countAllfiles = 0;
        int countGoodFiles = 0;
        if (result == DialogResult.OK)
        {
            toolStripProgressBar.Value = 0;
            string selectedFolder = folderBrowser.SelectedPath;
            string[] files = Directory.GetFiles(selectedFolder, "*.xml", SearchOption.AllDirectories);
            List<string> goodFiles = new List<string>();
            toolStripProgressBar.Maximum = files.Length;
            countAllfiles = files.GetLength(0);
            //Folder name
            FileInfo folderInfo = new FileInfo(selectedFolder);
            string folderName = folderInfo.Name;
            if (countAllfiles != 0)
            {
                foreach (string file in files)
                {
                    //file name
                    FileInfo fileInfo = new FileInfo(file);
                    string fileName = fileInfo.Name;
                    try
                    {
                        XmlDocument checkFileType = new XmlDocument();
                        checkFileType.Load(file);
                        if (checkFileType.SelectSingleNode("//Document/@Type").Value == "Test Results")
                        {
                            countGoodFiles++;
                            goodFiles.Add(file);
                        }
                    }
                    catch (Exception a)
                    {
                        StartForm.setDebug("Comparison Mode", a.Message, 21, "Can not read Selected XML file '" + fileName + "'", "Check file for compatibilyty", "File was excluded from list");
                    }
                    this.toolStripProgressBar.PerformStep();
                }
                if (countGoodFiles == 0)
                {
                    MessageBox.Show("There are no compatible XML files (exported from ZTR files) in '" + folderName + "'", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    StartForm.setDebug("Comparison Mode", "N/A", 20, "There are no compatible XML files (exported from ZTR files) in '" + folderName + "'", "Select a folder that contains compatible files!", "No file has been added to Select File Tree");
                    toolStripProgressBar.Value = 100;
                }
                else if (countGoodFiles > 0)
                {
                    this.Cursor = Cursors.WaitCursor;
                    AddFilesToTree(folderName, goodFiles.ToArray());
                    this.Cursor = Cursors.Default;
                }
            }
            else
            {
                MessageBox.Show("There are no XML files in '" + folderName + "'", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);                    
            }
        }           
    }

这是为了倾倒树景

        private void AddFilesToTree(string folder, string[] files)
    {
        //Define folder node
        TreeNode folderNode = new TreeNode();
        folderNode.Text = folder;
        folderNode.Name = "folder";
        folderNode.Tag = folder;
        treeViewBrowsedFiles.Nodes.Add(folderNode);
        //Define file node
        foreach (string file in files)
        {
            try
            {
            //To check if the file is a valid test result (converted to XML from ZTR files)
            XmlDocument checkFileType = new XmlDocument();
            checkFileType.Load(file);
                LoadZTRCmp xml = new LoadZTRCmp(file);
                TreeNode fileNode = new TreeNode();
                fileNode.Text = xml.FileInfo("BatchNumber");
                fileNode.Name = "file";
                fileNode.Tag = file;
                folderNode.Nodes.Add(fileNode);
                this.toolStripProgressBar.PerformStep();
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message);
            }
        }
        folderNode.Toggle();
    }

那么如何正确地做到这一点呢？

更新：**已解决**我发现了问题，在使用函数将节点添加到树视图之前，我必须执行这一行！！！

                        toolStripProgressBar.Maximum += countGoodFiles;
                    AddFilesToTree(folderName, goodFiles.ToArray());

进度条的固定最大值在TreeView开始加载之前，Still progressbar已完成(已达到最大值(。。。

       int progressSteps = (files.Length / 100)/2;

        toolStripProgressBar.Maximum = files.Length;