本文說明如何創建DataSet 對象,以及如何使用WriteXML方法將該對象包含的數據導出到 XML 文件中。生成的 XML 文件可以直接在 Excel 中打開。為便於說明,使用 Jet OLEDB 提供程序從 Microsoft Access Northwind 示例數據庫創建了DataSet 對象。但是,類似的代碼可與您使用 Visual C# .NET 創建的任何DataSet 對象一起使用。
1. 啟動 Microsoft Visual Studio .NET。在文件菜單上,單擊新建,然後單擊項目。從 Visual C# 項目類型中選擇Windows 應用程序。默認情況下創建 Form1。
2. 在視圖菜單上,選擇工具箱以顯示“工具箱”,然後向 Form1 中添加一個按鈕。
3. 雙擊Button1。將出現該窗體的代碼窗口。
4. 將下面的using 指令添加到 Form1.cs 頂部:
using System.Data.OleDb; using System.Xml;
//Connect to the data source.
OleDbConnection objConn = new OleDbConnection (strConn);
try
{
objConn.Open();
//Fill a dataset with records from the Customers table.
OleDbCommand objCmd = new OleDbCommand(
"Select CustomerID, CompanyName, ContactName, "
+ "Country, Phone from Customers", objConn);
OleDbDataAdapter objAdapter = new OleDbDataAdapter();
objAdapter.SelectCommand = objCmd;
DataSet objDataset = new DataSet();
objAdapter.Fill(objDataset);
//Create the FileStream to write with.
System.IO.FileStream fs = new System.IO.FileStream(
"C:\Customers.xml", System.IO.FileMode.Create);
//Create an XmlTextWriter for the FileStream.
System.Xml.XmlTextWriter xtw = new System.Xml.XmlTextWriter(
fs, System.Text.Encoding.Unicode);
//Add processing instructions to the beginning of the XML file, one
//of which indicates a style sheet.
xtw.WriteProcessingInstruction("xml", "version=1.0");
//xtw.WriteProcessingInstruction("xml-stylesheet",
// "type=text/xsl href=customers.xsl");
//Write the XML from the dataset to the file.
objDataset.WriteXml(xtw);
xtw.Close();
//Close the database connection.
objConn.Close();
}
catch (System.Exception ex)
{
MessageBox.Show(ex.Message);
}
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:template match="/">
<HTML>
<HEAD>
<STYLE>
.HDR { background-color:bisque;font-weight:bold }
</STYLE>
</HEAD>
<BODY>
<TABLE>
<COLGROUP WIDTH="100" ALIGN="CENTER"></COLGROUP>
<COLGROUP WIDTH="200" ALIGN="LEFT"></COLGROUP>
<COLGROUP WIDTH="200" ALIGN="LEFT"></COLGROUP>
<COLGROUP WIDTH="100" ALIGN="LEFT"></COLGROUP>
<COLGROUP WIDTH="100" ALIGN="LEFT"></COLGROUP>
<TD CLASS="HDR">Customer ID</TD>
<TD CLASS="HDR">Company</TD>
<TD CLASS="HDR">Contact</TD>
<TD CLASS="HDR">Country</TD>
<TD CLASS="HDR">Phone</TD>
<xsl:for-each select="NewDataSet/Table">
<TR>
<TD><xsl:value-of select="CustomerID"/></TD>
<TD><xsl:value-of select="CompanyName"/></TD>
<TD><xsl:value-of select="ContactName"/></TD>
<TD><xsl:value-of select="Country"/></TD>
<TD><xsl:value-of select="Phone"/></TD>
</TR>
</xsl:for-each>
</TABLE>
</BODY>
</HTML>
</xsl:template>
</xsl:stylesheet>