| >
59. {
60. SqlDataAdapter custDA = new SqlDataAdapter();
61. custDA.InsertCommand = new SqlCommand("INSERT INTO Customers (CustomerID, CompanyName) " + "Values(@CustomerID, @CompanyName)", nwindConn);
62. custDA.InsertCommand.Parameters.Add("@CustomerID", SqlDbType.NChar, 5, "CustomerID");
63. custDA.InsertCommand.Parameters.Add("@CompanyName", SqlDbType.NChar, 15, "CompanyName");
64. custDA.UpdateCommand = new SqlCommand("UPDATE Customers Set CustomerID = @CustomerID, " + "CompanyName = @CompanyName WHERE CustomerID = @OldCustomerID", nwindConn);
65. custDA.UpdateCommand.Parameters.Add("@CustomerID", SqlDbType.NChar, 5, "CustomerID");
66. custDA.UpdateCommand.Parameters.Add("@CompanyName", SqlDbType.NChar, 15, "CompanyName");
67. SqlParameter myParm = custDA.UpdateCommand.Parameters.Add("@OldCustomerID", SqlDbType.NChar, 5, "CustomerID");
68. myParm.SourceVersion = DataRowVersion.Original;
69. custDA.DeleteCommand = new SqlCommand("DELETE FROM Customers WHERE CustomerID = @CustomerID", nwindConn);
70. myParm = custDA.DeleteCommand.Parameters.Add("@CustomerID", SqlDbType.NChar, 5, "CustomerID");
71. myParm.SourceVersion = DataRowVersion.Original;
72. custDA.Update(custDS, "Customers");
73. return custDS;
74. }
}
IV．数据的再使用（比如排序、搜索或过滤数据）；
V．执行每行的大容量数据处理，处理DataReader挂起的连接服务已不再需要、影响性能的每一行；
VI．使用诸如XSLT转换或者XPath查询等XML操作的多重数据。
下面的例子介绍如何使用XmlDataDocument同步DataSet数据和如何使用XSLT样式文件在HTML文件中包含DataSet数据，首先是XSLT样式文件：
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:template match="CustomerOrders">
<HTML>
<STYLE>
BODY {font-family:verdana;font-size:9pt}
TD {font-size:8pt}
</STYLE>
<BODY>
<TABLE BORDER="1">
<xsl:apply-templates select="Customers"/>
</TABLE>
</BODY>
</HTML>
</xsl:template>
<xsl:template match="Customers">
<TR><TD>
<xsl:value-of select="ContactName"/>, <xsl:value-of select="Phone"/><BR/>
</TD></TR>
<xsl:apply-templates select="Orders"/>
</xsl:template>
<xsl:template match="Orders">
<TABLE BORDER="1">
<TR><TD valign="top"><B>Order:</B></TD><TD valign="top"><xsl:value-of select="OrderID"/></TD></TR>
<TR><TD valign="top"><B>Date:</B></TD><TD valign="top"><xsl:value-of select="OrderDate"/></TD></TR>
<TR><TD valign="top"><B>Ship To:</B></TD>
<TD valign="top"><xsl:value-of select="ShipName"/><BR/>
<xsl:value-of select="ShipAddress"/><BR/>
<xsl:value-of select="ShipCity"/>, <xsl:value-of select="ShipRegion"/> <xsl:value-of select="ShipPostalCode"/><BR/>
<xsl:value-of select="ShipCountry"/></TD></TR>
</TABLE>
</xsl:template>
</xsl:stylesheet>
接着下面的代码演示如何填充DataSet的数据和运用XSLT样式：
‘Visual Basic
Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports System.Xml
Imports System.Xml.Xsl
Public Class Sample
Public Shared Sub Main()
Dim nwindConn As SqlConnection = New SqlConnection("Data Source=localhost;Initial Catalog=northwind;Integrated Security=SSPI")
nwindConn.Open()
Dim myDataSet As DataSet = New DataSet("CustomerOrders")
Dim custDA As SqlDataAdapter = New SqlDataAdapt 上一页 [1] [2] [3] [4] [5] 下一页 | 
