/// <summary>取一个字段的值 /// /// </summary> /// <param name="filed">字段,如sum(je)</param> /// <param name="cond">条件,如userid=2</param> /// <returns></returns> public string GetOneFiled(string filed, string cond) { string sql = "select " + filed + " from [user]"; if (!string.IsNullOrEmpty(cond)) { sql += " where " + cond; } MSSQLHelper h = new MSSQLHelper(); h.CreateCommand(sql); return(h.ExecuteScalar()); }
/// <summary>计算记录数 /// /// </summary> /// <param name="p"></param> /// <returns></returns> public int CalcCount(string cond, IDbDataParameter[] paras = null) { string sql = "select count(1) from [user]"; if (!string.IsNullOrEmpty(cond)) { sql += " where " + cond; } MSSQLHelper h = new MSSQLHelper(); h.CreateCommand(sql); if (paras != null) { h.AddParameter(paras); } return(int.Parse(h.ExecuteScalar())); }
/// <summary>增加一条数据 /// /// </summary> public int Add(mhqNetAPP.Model.User model) { StringBuilder strSql = new StringBuilder(); strSql.Append("insert into [user]("); strSql.Append("[creatdate], [username], [password], [face], [usertype], [phone], [qq], [email], [remark] )"); strSql.Append(" values ("); strSql.Append("@creatdate, @username, @password, @face, @usertype, @phone, @qq, @email, @remark )"); strSql.Append(";select @@IDENTITY"); MSSQLHelper h = new MSSQLHelper(); h.CreateCommand(strSql.ToString()); if (model.creatdate == null) { h.AddParameter("@creatdate", DBNull.Value); } else { h.AddParameter("@creatdate", model.creatdate); } if (model.username == null) { h.AddParameter("@username", DBNull.Value); } else { h.AddParameter("@username", model.username); } if (model.password == null) { h.AddParameter("@password", DBNull.Value); } else { h.AddParameter("@password", model.password); } if (model.face == null) { h.AddParameter("@face", DBNull.Value); } else { h.AddParameter("@face", model.face); } if (model.usertype == null) { h.AddParameter("@usertype", DBNull.Value); } else { h.AddParameter("@usertype", model.usertype); } if (model.phone == null) { h.AddParameter("@phone", DBNull.Value); } else { h.AddParameter("@phone", model.phone); } if (model.qq == null) { h.AddParameter("@qq", DBNull.Value); } else { h.AddParameter("@qq", model.qq); } if (model.email == null) { h.AddParameter("@email", DBNull.Value); } else { h.AddParameter("@email", model.email); } if (model.remark == null) { h.AddParameter("@remark", DBNull.Value); } else { h.AddParameter("@remark", model.remark); } int result; string obj = h.ExecuteScalar(); if (!int.TryParse(obj, out result)) { return(0); } return(result); }