DataSet 的 WriteXml 方法使您能够以 XML 数据形式来编写 DataSet 的内容。随后的一项常见任务是使用 XSL 转换 (XSLT) 将该 XML 转换为另一种格式。不过，通过使 DataSet 与 XmlDataDocument 同步，可以将 XSLT 样式表应用于 DataSet 的内容，而不必首先使用 WriteXml 以 XML 数据形式来编写 DataSet 的内容。
以下示例使用表和关系填充一个 DataSet，使该 DataSet 与 XmlDataDocument 同步，然后使用 XSLT 样式表以 HTML 文件形式来编写该 DataSet 的一部分。下面是该 XSLT 样式表的内容。
1 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
2
3 <xsl:template match="CustomerOrders">
4 <HTML>
5 <STYLE>
6 BODY {font-family:verdana;font-size:9pt}
7 TD {font-size:8pt}
8 </STYLE>
9 <BODY>
10 <TABLE BORDER="1">
11 <xsl:apply-templates select="Customers"/>
12 </TABLE>
13 </BODY>
14 </HTML>
15 </xsl:template>
16
17 <xsl:template match="Customers">
18 <TR><TD>
19 <xsl:value-of select="ContactName"/>, <xsl:value-of select="Phone"/><BR/>
20 </TD></TR>
21 <xsl:apply-templates select="Orders"/>
22 </xsl:template>
23
24 <xsl:template match="Orders">
25 <TABLE BORDER="1">
26 <TR><TD valign="top"><B>Order:</B></TD><TD valign="top"><xsl:value-of select="OrderID"/></TD></TR>
27 <TR><TD valign="top"><B>Date:</B></TD><TD valign="top"><xsl:value-of select="OrderDate"/></TD></TR>
28 <TR><TD valign="top"><B>Ship To:</B></TD>
29 <TD valign="top"><xsl:value-of select="ShipName"/><BR/>
30 <xsl:value-of select="ShipAddress"/><BR/>
31 <xsl:value-of select="ShipCity"/>, <xsl:value-of select="ShipRegion"/> <xsl:value-of select="ShipPostalCode"/><BR/>
32 <xsl:value-of select="ShipCountry"/></TD></TR>
33 </TABLE>
34 </xsl:template>
35
36 </xsl:stylesheet>
37
2
3 <xsl:template match="CustomerOrders">
4 <HTML>
5 <STYLE>
6 BODY {font-family:verdana;font-size:9pt}
7 TD {font-size:8pt}
8 </STYLE>
9 <BODY>
10 <TABLE BORDER="1">
11 <xsl:apply-templates select="Customers"/>
12 </TABLE>
13 </BODY>
14 </HTML>
15 </xsl:template>
16
17 <xsl:template match="Customers">
18 <TR><TD>
19 <xsl:value-of select="ContactName"/>, <xsl:value-of select="Phone"/><BR/>
20 </TD></TR>
21 <xsl:apply-templates select="Orders"/>
22 </xsl:template>
23
24 <xsl:template match="Orders">
25 <TABLE BORDER="1">
26 <TR><TD valign="top"><B>Order:</B></TD><TD valign="top"><xsl:value-of select="OrderID"/></TD></TR>
27 <TR><TD valign="top"><B>Date:</B></TD><TD valign="top"><xsl:value-of select="OrderDate"/></TD></TR>
28 <TR><TD valign="top"><B>Ship To:</B></TD>
29 <TD valign="top"><xsl:value-of select="ShipName"/><BR/>
30 <xsl:value-of select="ShipAddress"/><BR/>
31 <xsl:value-of select="ShipCity"/>, <xsl:value-of select="ShipRegion"/> <xsl:value-of select="ShipPostalCode"/><BR/>
32 <xsl:value-of select="ShipCountry"/></TD></TR>
33 </TABLE>
34 </xsl:template>
35
36 </xsl:stylesheet>
37
以下代码是填充 DataSet 和应用 XSLT 样式表的代码。
注意 当应用 XSLT 样式表的 DataSet 包含关系时，如果为每个嵌套关系将 DataRelation 的 Nested 属性设置为 true，将获得最佳性能。此设置使您可以使用 XSLT 样式表，执行正常的由上而下处理以遍历层次结构和转换数据，而不是使用性能密集的 XPath 定位轴（例如，样式表节点测试表达式中的前同辈和后同辈）来遍历数据层次结构。有关嵌套关系的更多信息，请参见嵌套的 DataRelation。
1 using System;
2 using System.Data;
3 using System.Data.SqlClient;
4 using System.Xml;
5 using System.Xml.Xsl;
6
7 public class Sample
8 {
9 public static void Main()
10 {
11 SqlConnection nwindConn = new SqlConnection("Data Source=localhost;Initial Catalog=northwind;Integrated Security=SSPI;");
12 nwindConn.Open();
13
14 DataSet custDS = new DataSet("CustomerDataSet");
15
16 SqlDataAdapter custDA = new SqlDataAdapter("SELECT * FROM Customers", nwindConn);
17 custDA.Fill(custDS, "Customers");
18
19 SqlDataAdapter ordersDA = new SqlDataAdapter("SELECT * FROM Orders", nwindConn);
20 ordersDA.Fill(custDS, "Orders");
21
22 nwindConn.Close();
23
24 custDS.Relations.Add("CustOrders",
25 custDS.Tables["Customers"].Columns["CustomerID"],
26 custDS.Tables["Orders"].Columns["CustomerID"]).Nested = true;
27
28 XmlDataDocument xmlDoc = new XmlDataDocument(custDS);
29
30 XslTransform xslTran = new XslTransform();
31 xslTran.Load("transform.xsl");
32
33 XmlTextWriter writer = new XmlTextWriter("xslt_output.html", System.Text.Encoding.UTF8);
34
35 xslTran.Transform(xmlDoc, null, writer);
36 writer.Close();
37 }
38 }
1 public void ProcessRequest(HttpContext context)
2 {
3 context.Response.ContentType = "text/xml";
4
5 int TypeId = Convert.ToInt32(context.Request["TypeId"]);
6 int AID = Convert.ToInt32(context.Request["AID"]);
7 int MemberId = 0;
8
9 if (!String.IsNullOrEmpty(SessionHelper.CurrentMemberId()))
10 {
11 MemberId = Convert.ToInt32(SessionHelper.CurrentMemberId());
12 }
13
14 object[] Params ={ AID, TypeId, MemberId };
15 DataSet hotDs = SQLHelperV2.DataSetUseTrans("F_Last_ArticleShow", Params);
16
17 hotDs.Tables[0].TableName = "ArtListAll";
18
19 XmlDataDocument doc = new XmlDataDocument(hotDs);
20
21 XslCompiledTransform tran = new XslCompiledTransform();
22
23 XsltSettings settings = new XsltSettings(true, true);
24
25 tran.Load(context.Server.MapPath("/ArtHander/HotNewsList.xsl"), settings, null);
26
27 XsltArgumentList xslArg = new XsltArgumentList();
28 xslArg.AddParam("TypeId", "", context.Request["TypeId"]);
29
30 StringBuilder sb = new StringBuilder();
31 StringWriter sw = new StringWriter(sb);
32
33 XmlTextWriter writer = new XmlTextWriter(sw);
34
35 tran.Transform(doc, xslArg, writer);
36
37 writer.Close();
38
39 context.Response.Write(sb.ToString());
40
41 }
2 {
3 context.Response.ContentType = "text/xml";
4
5 int TypeId = Convert.ToInt32(context.Request["TypeId"]);
6 int AID = Convert.ToInt32(context.Request["AID"]);
7 int MemberId = 0;
8
9 if (!String.IsNullOrEmpty(SessionHelper.CurrentMemberId()))
10 {
11 MemberId = Convert.ToInt32(SessionHelper.CurrentMemberId());
12 }
13
14 object[] Params ={ AID, TypeId, MemberId };
15 DataSet hotDs = SQLHelperV2.DataSetUseTrans("F_Last_ArticleShow", Params);
16
17 hotDs.Tables[0].TableName = "ArtListAll";
18
19 XmlDataDocument doc = new XmlDataDocument(hotDs);
20
21 XslCompiledTransform tran = new XslCompiledTransform();
22
23 XsltSettings settings = new XsltSettings(true, true);
24
25 tran.Load(context.Server.MapPath("/ArtHander/HotNewsList.xsl"), settings, null);
26
27 XsltArgumentList xslArg = new XsltArgumentList();
28 xslArg.AddParam("TypeId", "", context.Request["TypeId"]);
29
30 StringBuilder sb = new StringBuilder();
31 StringWriter sw = new StringWriter(sb);
32
33 XmlTextWriter writer = new XmlTextWriter(sw);
34
35 tran.Transform(doc, xslArg, writer);
36
37 writer.Close();
38
39 context.Response.Write(sb.ToString());
40
41 }
