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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