/// <summary> /// 通过用户名查找用户的个性签名 /// </summary> /// <param name="userName"></param> /// <returns></returns> public string GetSignature(string userName) { User_dal user_dal = new User_dal(); object objSignature = user_dal.GetSignature(userName); if (objSignature == null || objSignature == System.DBNull.Value) { /// } return(objSignature.ToString()); }