WPF 获取文件夹路径，目录路径，复制文件，选择下载文件夹/目录

private void Border_MouseLeftButtonUp_4(object sender, MouseButtonEventArgs e)
{
//获取项目中文件
string WantedPath = System.Windows.Forms.Application.StartupPath.Substring(0, System.Windows.Forms.Application.StartupPath.LastIndexOf(@"\"));
string path2 = System.IO.Path.GetDirectoryName(WantedPath);
path2 = path2 + @"\Excel\任务分配管理Excel文件.xls";
//用户选择目录
System.Windows.Forms.FolderBrowserDialog fbd = new System.Windows.Forms.FolderBrowserDialog();
fbd.ShowDialog();
var s = fbd.SelectedPath;
if (fbd.SelectedPath != string.Empty)
{
File.Copy(path2, fbd.SelectedPath + "\\任务分配管理Excel文件.xls", true);
MessageBox.Show("下载完毕");
}
}