1 。 创建及使用
string ConnectString = "user id =" + this._User + ";data source= " + this._Server + ";initial catalog= " + this._DB + ";password=" + this._Pwd;
SqlConnection cn = new SqlConnection();
cn.ConnectionString = ConnectString;
string sSQL = "select * from Meet_Manager where MagName='" + Magname + "'";
SqlDataAdapter da = new SqlDataAdapter(sSQL, cn);
填充给datatable:
DataTable dtManage = new DataTable();
da.Fill(dtManage);
填充给dataset:
dataset ds = new dataset();
da.Fill(ds,"mytable");
注意:
使用SqlDataAdapter 时,不用使用Connection 对象的Open方法,因为SqlDataAdapter会自动开放一个连接,然后提交查询,获取结果,最后关闭连接。如果Fill方法之前就开放了Connection ,那么Connection在操作之后仍然保持开放的状态。
2 . 处理批查询
string strConn,strSQL
strConn = "Porvider = ..."
strSQL = "select * from customers ;"+
"select * from orders";
SqlDataAdapter da = new SqlDataAdapter (strSQL,strConn);
da.TableMappings.Add("Table","customers");
da.TableMappings.Add("Table1","orders");
DataSet ds = new DataSet();
da.Fill(ds)