OpenFileDialog 和 FolderBrowserDialog

OpenFileDialog 和 FolderBrowserDialog：

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【 FolderBrowserDialog 的使用】: 提示用户选择文件夹；

    //设置根在桌面

    folderBrowserDialog1.RootFolder = SpecialFolder.Desktop;



    //设置当前选择的路径

    folderBrowserDialog1.SelectedPath = "C:";



    //允许在对话框中包括一个新建目录的按钮

    folderBrowserDialog1.ShowNewFolderButton = true;



    //设置对话框的说明信息

    folderBrowserDialog1.Description = "请选择输出目录";



    //默认路径是程序所在目录的Data文件夹

    folderBrowserDialog1.SelectedPath = System.Environment.CurrentDirectory.ToString() + @"/Data";



    //弹出框用于选择路径，完成后校验路径是否正确

    if(folderBrowser.Dialog1.ShowDialog() == DialogResult.OK)

    {

        //获取选择的路径

        String szSelectedPath = folderBrowserDialog1.SelectedPath;

    }



    例：

        //点击浏览按钮后，填出框用于选择路径

        private void ButtonScanClick(object sender, EventArgs e)

        {

            FolderBrowserDialog fbd = new FolderBrowserDialog ();

            fbd.Description = "选择文件夹";

            fbd.RootFolder = Environment.SpecialFolder.MyComputer;

            fbd.ShowNewFolderButton = true;

            if(fbd.ShowDialog() != DialogResult.OK)

                return;



            string path=fbd.SelectedPath;

            textBox1.Text=path;

        }

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【 OpenFileDialog 的使用】: 提示用户打开文件，使用此类可检查某个文件是否存在并打开该文件；

    例：

    private void Button1Click(object sender, EventArgs e)

    {

        //类的实例化

        OpenFileDialog openFileDialog1 = new OpenFileDialog();



        //打开位置

        openFileDialog1.InitialDirectory =Environment.GetFolderPath(Environment.SpecialFolder.MyComputer);



        //文件类型

        openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";



        //表示默认筛选情况

        openFileDialog1.FilterIndex = 1;



        //获取或设置一个值，该值指示对话框在关闭前是否还原当前目录。

        openFileDialog1.RestoreDirectory = true;



        //文件有效性验证ValidateNames，验证用户输入是否是一个有效的Windows文件名

        openFileDialog1.ValidateNames = true;



        //验证路径有效性

        openFileDialog1.CheckFileExists = true;



        //验证文件有效性

        openFileDialog1.CheckPathExists = true;



        //弹出框用于选择路径，完成后校验路径是否正确

        if (openFileDialog1.ShowDialog() != DialogResult.OK)

            return;



        string path=openFileDialog1.SafeFileName;

        this.textBox1.AppendText(path);

    }

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