（转）C# 选择文件 选择路径 保存文件名称路径

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{       class FilePathHelper     {         /// <summary>         /// 选择保存文件的名称以及路径  取消返回 空"";         /// </summary>         /// <param name="fileName"></param>         /// <param name="filter"></param>         /// <param name="title"></param>         /// <returns></returns>         public static string SaveFilePathName(string fileName=null, string filter=null, string title=null)         {             string path = "";             System.Windows.Forms.SaveFileDialog fbd = new System.Windows.Forms.SaveFileDialog();             if (!string.IsNullOrEmpty(fileName))             {                 fbd.FileName = fileName;             }             if (!string.IsNullOrEmpty(filter))             {                 fbd.Filter = filter;// "Excel|*.xls;*.xlsx;";             }             if (!string.IsNullOrEmpty(title))             {                 fbd.Title = title;// "保存为";             }             if (fbd.ShowDialog() == System.Windows.Forms.DialogResult.OK)             {                 path = fbd.FileName;             }             return path;         }         /// <summary>         /// 选择一个文件         /// </summary>         /// <param name="filter">如果需要筛选txt文件（"Files (*.txt)|*.txt"）</param>         /// <returns></returns>         private static string SelectFile(string filter=null)         {             string path = string.Empty;             var openFileDialog = new Microsoft.Win32.OpenFileDialog()             {                 Filter = "Files (*.*)|*.*"//如果需要筛选txt文件（"Files (*.txt)|*.txt"）             };             if (filter!=null)             {                 openFileDialog.Filter = filter;             }             var result = openFileDialog.ShowDialog();             if (result == true)             {                 path = openFileDialog.FileName;             }             return path;         }                    /// <summary>         /// 选择一个路径         /// </summary>         /// <returns></returns>         public static string SelectPath()         {             string path = string.Empty;             System.Windows.Forms.FolderBrowserDialog fbd = new System.Windows.Forms.FolderBrowserDialog();             if (fbd.ShowDialog() == System.Windows.Forms.DialogResult.OK)             {                 path = fbd.SelectedPath;             }             return path;         }     } }