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ado.net数据操作全接触四(表关联,DataAdapter)

2007-04-15 08:00:00  作者:  来源:互联网  浏览次数:0  文字大小:【】【】【
简介:8.1创建一个(主/祥)表关联 1: 2: 3: 4: 29: 9.1使用DataAdapter UPDATE模式 1: 2: 3: 4: 30: 9.2使用DataAdapter UPDATE模式(C#) 1: 2: 3: 4: 5: 25:

8.1创建一个(主/祥)表关联

1: <%@ Import Namespace="System.Data" %>

2: <%@ Import NameSpace="System.Data.SqlClient" %>

3:

4: <%

5: Dim myConnection As SqlConnection

6: Dim myDataAdapter As SqlDataAdapter

7: Dim myDataSet As DataSet

8: Dim myDataTable As DataTable

9: Dim Publisher As DataRow

10: Dim Title As DataRow

11:

12: myConnection = New SqlConnection( "server=localhost;uid=sa;pwd=secret;database=Pubs" )

13: myDataSet = New DataSet()

14: myDataAdapter = New SQLDataAdapter( "Select * From Publishers",

http://ASPfree.com/chapters/sams/graphics/ccc.gifmyConnection )

15: myDataAdapter.Fill( myDataSet, "Publishers" )

16: myDataAdapter.SelectCommand = New SqlCommand( "Select * From Titles",

http://ASPfree.com/chapters/sams/graphics/ccc.gifmyConnection )

17: myDataAdapter.Fill( myDataSet, "Titles" )

18:

19: myDataSet.Relations.Add( "PubTitles",

http://ASPfree.com/chapters/sams/graphics/ccc.gifmyDataSet.Tables( "Publishers" ).Columns( "pub_id" ),

http://ASPfree.com/chapters/sams/graphics/ccc.gifmyDataSet.Tables( "Titles" ).Columns( "pub_id" ) )

20:

21: For Each Publisher in myDataSet.Tables( "Publishers" ).Rows

22: Response.Write( "

" & Publisher( "pub_name" ) & ":" )

23: For Each Title In Publisher.GetChildRows( "PubTitles" )

24: Response.Write("

  • " & Title( "title" ) )

    25: Next

    26: Next

    27:

    28: %>

    29:

    9.1使用DataAdapter UPDATE模式

    1: <%@ Import Namespace="System.Data" %>

    2: <%@ Import NameSpace="System.Data.SqlClient" %>

    3:

    4: <%

    5: Dim myConnection As SqlConnection

    6: Dim myDataAdapter As SqlDataAdapter

    7: Dim myBuilder As SqlCommandBuilder

    8: Dim myDataSet As DataSet

    9: Dim myDataTable As DataTable

    10: Dim Author As DataRow

    11:

    12: ' Create the DataSet and DataAdapter

    13: myConnection = New SqlConnection( "server=localhost;uid=sa;pwd=secret;database=Pubs" )

    14: myDataSet = New DataSet()

    15: myDataAdapter = New SqlDataAdapter( "Select * From Author", myConnection )

    16: myDataAdapter.Fill( myDataSet, "Authors" )

    17:

    18: ' Change value of first row

    19: myDataSet.Tables( "Authors" ).Rows( 0 ).Item( "au_fname" ) = "Jane"

    20:

    21: ' Update the Database Table

    22: myBuilder = New SqlCommandBuilder( myDataAdapter )

    23: myDataAdapter.Update( myDataSet, "Authors" )

    24:

    25: ' Display the Records

    26: For Each Author in myDataSet.Tables( "Authors" ).Rows

    27: Response.Write( "

    " & Author( "au_fname" ) & " "

    http://ASPfree.com/chapters/sams/graphics/ccc.gif& Author( "au_lname" ) )

    28: Next

    29: %>

    30:

    9.2使用DataAdapter UPDATE模式(C#)

    1: <%@ Page Language="C#" %>

    2: <%@ Import Namespace="System.Data" %>

    3: <%@ Import NameSpace="System.Data.SqlClient" %>

    4:

    5: <%

    6: // Create the DataSet and DataAdapter

    7: SqlConnection myConnection = new

    http://ASPfree.com/chapters/sams/graphics/ccc.gifSqlConnection( "server=localhost;uid=sa;pwd=secret;database=Pubs" );

    8: DataSet myDataSet = new DataSet();

    9: SqlDataAdapter myDataAdapter = new SqlDataAdapter(

    http://ASPfree.com/chapters/sams/graphics/ccc.gif"Select * From Authors3", myConnection );

    10: myDataAdapter.Fill( myDataSet, "Authors" );

    11:

    12: // Change value of first row

    13: myDataSet.Tables[ "Authors" ].Rows[ 0 ][ "au_fname" ] = "Jane";

    14:

    15: // Update the Database Table

    16: SqlCommandBuilder myBuilder = new SqlCommandBuilder( myDataAdapter );

    17: myDataAdapter.Update( myDataSet, "Authors" );

    18:

    19: // Display the Records

    20: foreach ( DataRow Author in myDataSet.Tables[ "Authors" ].Rows )

    21: {

    22: Response.Write( "

    " + Author[ "au_fname" ] + " "

    http://ASPfree.com/chapters/sams/graphics/ccc.gif+ Author[ "au_lname" ] );

    23: }

    24: %>

    25:

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