C# SaveFileDialog与OpenFileDialog用法案例详解
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)|*.csv ofd.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; } }
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)|*.csv ofd.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"; } } }
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"); }
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 true dialog.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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