打算在别的类里，调用该函数，更新数据库
ds=dataset; myconnnection=sqlconnnection
TempSqlStr是sql语句 如select * from commodity_tbl


public DataSet UpdateDataBase(string TempSqlStr,string TempTableName)
{
this.ds.Clear();
this.strSQL=TempSqlStr;
this.myConnection=new SqlConnection(connectionString);
this.da=new SqlDataAdapter(this.strSQL,this.myConnection);
this.sqlCmdBld = new SqlCommandBuilder(da);
this.da.Update(ds,TempTableName);
return ds;
}
可是，没有反应。数据库自然也没更新，怎么回事