C# 选择文件 选择文件夹

        //选择文件夹
        private String selectFolder()
        {
            String path = "";
            System.Windows.Forms.FolderBrowserDialog folderChooser = new System.Windows.Forms.FolderBrowserDialog();
            folderChooser.Description = "请选择文件夹";
            if (folderChooser.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                path = folderChooser.SelectedPath;
            }
            return path;
        }

        //选择文件
        private String selectFile()
        {
            String path = "";
            System.Windows.Forms.OpenFileDialog fileDialog = new System.Windows.Forms.OpenFileDialog();
            //设置是否可以多选
            fileDialog.Multiselect = true;
            //设置标题
            fileDialog.Title = "请选择文件";
            //设置初始打开目录，默认为空
            fileDialog.InitialDirectory = "";
            //设置文件过滤，不同格式用分号隔开
            fileDialog.Filter = "文本1(*.txt)|*.txt;*.py|文本2(*.csv)|*.csv";
            if (fileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                path = fileDialog.FileName;
                //获取多个文件路径
                String[] paths = fileDialog.FileNames;
            }
            return path;
        }