C#|C# SaveFileDialog与OpenFileDialog用法案例详解 C#SaveFileDialog与OpenFileDialog用法

1.OpenFileDialog

private void btnOpen_Click(object sender, EventArgs e){OpenFileDialog ofd = new OpenFileDialog(); ofd.InitialDirectory = @"C:\Users\LWP1398\Desktop"; //设置初始路径ofd.Filter = "Excel文件(*.xls)|*.xls|Csv文件(*.csv)|*.csv|所有文件(*.*)|*.*"; //设置“另存为文件类型”或“文件类型”框中出现的选择内容ofd.FilterIndex = 2; //设置默认显示文件类型为Csv文件(*.csv)|*.csvofd.Title = "打开文件"; //获取或设置文件对话框标题ofd.RestoreDirectory = true; if (ofd.ShowDialog() == DialogResult.OK){//FileName：所选文件的全路径SafeFileName：所选的文件名txtPath.Text = "FileName:" + ofd.FileName + "\r\n" + "SafeFileName:" + ofd.SafeFileName; }}

C#|C# SaveFileDialog与OpenFileDialog用法案例详解

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2.OpenFileDialog选择多个文件

private void button3_Click(object sender, EventArgs e){OpenFileDialog ofd = new OpenFileDialog(); ofd.InitialDirectory = @"C:\Users\LWP1398\Desktop"; //设置初始路径ofd.Filter = "Excel文件(*.xls)|*.xls|Csv文件(*.csv)|*.csv|所有文件(*.*)|*.*"; //设置“另存为文件类型”或“文件类型”框中出现的选择内容ofd.FilterIndex = 2; //设置默认显示文件类型为Csv文件(*.csv)|*.csvofd.Title = "打开文件"; //获取或设置文件对话框标题ofd.RestoreDirectory = true; 设置对话框是否记忆上次打开的目录 ofd.Multiselect = true; //设置多选if (ofd.ShowDialog() == DialogResult.OK){for (int i = 0; i < ofd.FileNames.Length; i++){txtPath.Text += ofd.FileNames[i] + "\r\n"; //输出一个路径回车换行}for (int i = 0; i < ofd.FileNames.Length; i++){txtPath.Text += ofd.SafeFileNames[i] + "\r\n"; }}}

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3.SaveFileDialog

private void button2_Click(object sender, EventArgs e){SaveFileDialog sfd=new SaveFileDialog(); sfd.Filter = "文本文件(*.txt)|*.txt|所有文件|*.*"; //设置文件类型sfd.FileName = "保存"; //设置默认文件名sfd.DefaultExt = "txt"; //设置默认格式（可以不设）sfd.AddExtension = true; //设置自动在文件名中添加扩展名if (sfd.ShowDialog()==DialogResult.OK){txtPath.Text = "FileName:" + sfd.FileName + "\r\n" ; using (StreamWriter sw = new StreamWriter(sfd.FileName)){sw.WriteLineAsync("今天是个好天气"); }}MessageBox.Show("ok"); }

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private void saveFileDialog1_FileOk(object sender, CancelEventArgs e){saveFileDialog1.AddExtension = true; //自动添加扩展名e.Cancel = true; //取消保存操作string 扩展名 = System.IO.Path.GetExtension(saveFileDialog1.FileName); //判断扩展名并实现自定义的保存操作(导出)if (扩展名 == "txt"){ }if (扩展名 == "xml"){ }}

4.FolderBrowserDialog

string defaultPath = ""; FolderBrowserDialog dialog = new FolderBrowserDialog(); //打开的文件夹浏览对话框上的描述dialog.Description = "请选择一个文件夹"; //是否显示对话框左下角新建文件夹按钮，默认为 truedialog.ShowNewFolderButton = false; //首次defaultPath为空，按FolderBrowserDialog默认设置（即桌面）选择if (defaultPath != ""){ //设置此次默认目录为上一次选中目录 dialog.SelectedPath = defaultPath; }//按下确定选择的按钮if (dialog.ShowDialog() == DialogResult.OK){ //记录选中的目录 defaultPath = dialog.SelectedPath; }MessageBox.show(defaultPath);

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