/// <summary>
/// 获取登录名ByPDM（UserName）
/// </summary>
/// <returns></returns>
public static String GetLoginUserName()
{
string a = PDMHelper.GetLoginID();
DataTable dt = PDMHelper.GetUserList();
DataView dv = new DataView(dt);
dv.RowFilter = string.Format(" UserId='{0}' ", a);
return(dv.ToTable("default").Rows[0]["UserName"].ToString());
}