在WPF中调用打开文件对话框

// Create OpenFileDialog
Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();

// Set filter for file extension and default file extension
dlg.DefaultExt = ".txt";
dlg.Filter = "JPEG Files (*.jpeg)|*.jpeg|PNG Files (*.png)|*.png|JPG Files (*.jpg)|*.jpg|GIF Files (*.gif)|*.gif";

// Display OpenFileDialog by calling ShowDialog method
Nullable<bool> result = dlg.ShowDialog();

// Get the selected file name and display in a TextBox
if (result == true)
{
// Open document
string filename = dlg.FileName;
this.txtPlace.Text = filename;
}