所属类别：Asp

文章作者：未知

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使用DataReader的GetSchemaTable()方法可以获得数据表中包含的结构信息，此方法返回一个DataTable,DataTable中的每一行(Row)的ColumnName属性值即为数据表的一个字段名。SqlConnection coreDB=new SqlConnection();coreDB.ConnectionString= "workstation id=\"GQA-ERIC-LV\";packet size=4096;integrated security=SSPI;" +"data source=\"gqa-eric-lv\";persist security info=False;initial catalog=CoreDB";string mySelectQuery = "SELECT ID, Title FROM myBBS order by id asc";SqlCommand myCommand = new SqlCommand(mySelectQuery,coreDB);coreDB.Open();SqlDataReader myReader=myCommand.ExecuteReader();//将数据库定义的信息保存到表SchemaTable中：DataTable SchemaTable=myReader.GetSchemaTable();//表SchemaTable的每一行表示数据库表一个字段的信息：Response.Write("");foreach(DataRow myRow in SchemaTable.Rows){Response.Write("");Response.Write(myRow["ColumnName"]);Response.Write("");}Response.Write("");while(myReader.Read()){Response.Write("");Response.Write(""+myReader["ID"].ToString()+"");Response.Write(""+myReader["title"].ToString()+"");Response.Write("");}Response.Write("");myReader.Close();coreDB.Close();显示的结果如图：以上亦例示了SqlConnection,SqlCommand,DataReader的使用。数据库coreDB中的表myBBS定义如下：if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[myBBS]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)drop table [dbo].[myBBS]GOCREATE TABLE [dbo].[myBBS] ([ID] [bigint] IDENTITY (1, 1) NOT NULL ,[Title] [char] (160) COLLATE Chinese_PRC_CI_AS NULL ,[Author] [char] (20) COLLATE Chinese_PRC_CI_AS NULL ,[Date_of_Created] [datetime] NULL ,[Abstract] [char] (480) COLLATE Chinese_PRC_CI_AS NULL ,[Content] [ntext] COLLATE Chinese_PRC_CI_AS NOT NULL) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]GO关闭本页

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