c# – 使用Directory类,检查某些文件类型的目录

*编辑：我可以让用户使用名为txtFilter的文本框选择一组特定文件(例如* .dwg或* .pdf).

private void button1_Click(object sender,EventArgs e)
{
    string sourceFolder = txtSource.Text;
    string destinationFolder = txtDestination.Text;
    CopyFolderContents(sourceFolder,destinationFolder);
}

// Copies the contents of a folder,including subfolders to an other folder,overwriting existing files
public void CopyFolderContents(string sourceFolder,string destinationFolder)
        {
            string filter = txtFilter.Text;

            if (Directory.Exists(sourceFolder))
            {
                // Copy folder structure
                foreach (string sourceSubFolder in Directory.GetDirectories(sourceFolder,"*",SearchOption.AllDirectories))
                {
                    Directory.CreateDirectory(sourceSubFolder.Replace(sourceFolder,destinationFolder));
                }

                // Copy files
                foreach (string sourceFile in Directory.GetFiles(sourceFolder,filter,SearchOption.AllDirectories))
                {
                    string destinationFile = sourceFile.Replace(sourceFolder,destinationFolder);
                    File.Copy(sourceFile,destinationFile,true);
                }
            }
        }