100165649.htm
来自「C#高级编程(第三版),顶死你们。。 。up」· HTM 代码 · 共 213 行 · 第 1/3 页
HTM
213 行
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><title>
23.8.1 将ADO.NET数据转换为XML文档(2)
</title></head>
<body>
<div class="area">
<div class="col1">
<div class="lineBlue">
</div>
<!-- title -->
<div class="arcTitle">
<h1>
<a href="../16">
C#高级编程（第3版）
</a>
</h1>
<div style="text-align: center; font-size: 15px">
<a href="100165649.htm">
23.8.1 将ADO.NET数据转换为XML文档(2)
</a>
</div>
<div style="text-align: center; font-size: 15px">
<a class="url" href="../../default.htm">http://book.csdn.net/</a>
2006-10-13 14:41:00
</div>
<div style="margin: 0px auto; width: 700px; border: solid 1px #0b5f98;">
<div style="float: left; width: 16px; background-color: #0b5f98; color: White; padding: 1px;">
图书导读
</div>
<div style="float: right; width: 670px; text-align: left; line-height: 16pt; padding-left: 2px">
<!--导读-->
<h1 id="divCurrentNode" style="color: #b83507; width: 100%; text-align: left; font-size: 12px; padding-left: 2px">当前章节:<a href='100165649.htm'><font color='red'>23.8.1 将ADO.NET数据转换为XML文档(2)</font></a></h1>
<div id="divRelateNode" style="padding-left: 2px">
<div style='float:left;width:49%'>·<a href='100165646.htm'>23.7.2 System.Xml.Xsl命名空间</a></div><div style='float:right;width:49%'>·<a href='100165647.htm'>23.8 XML和ADO.NET</a></div><div style='float:left;width:49%'>·<a href='100165648.htm'>23.8.1 将ADO.NET数据转换为XML文档(1)</a></div><div style='float:right;width:49%'>·<a href='100165650.htm'>23.8.2 把XML文档转换为 ADO.NET数据</a></div><div style='float:left;width:49%'>·<a href='100165651.htm'>23.8.3 读写DiffGram</a></div><div style='float:right;width:49%'>·<a href='100165652.htm'>23.9 在XML中串行化对象</a></div></div>
</div>
</div>
</div>
<!-- main -->
<div id="main">
<div id="text">
<div id="csdn_zhaig_ad_yahoo_2"></div>
<link href="css.css" rel="stylesheet" type="text/css" /><h4 style="FTEL: 21.45pt"><span lang="EN-US">1. </span><span style="FONT-FAMILY: 黑体">转换关系数据</span></h4>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">这看起来非常简单，因为只有一个表。但对于关系数据，例如</span><span lang="EN-US">DataSet</span><span style="FONT-FAMILY: 宋体">中有多个</span><span lang="EN-US">DataTables </span><span style="FONT-FAMILY: 宋体">和</span><span lang="EN-US"> Relations</span><span style="FONT-FAMILY: 宋体">，该怎么办？其工作方式仍旧是这样。下面对前面的代码进行如下修改</span><span lang="EN-US">(</span><span style="FONT-FAMILY: 宋体">这个版本的代码在</span><span lang="EN-US">ADOSample3</span><span style="FONT-FAMILY: 宋体">中</span><span lang="EN-US">)</span><span style="FONT-FAMILY: 宋体">：</span></p>
<p class="a6" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">private void button1</span><span lang="EN-US" style="FONT-FAMILY: 'Baskerville BE Regular'">_</span><span lang="EN-US">Click(object sender, System.EventArgs e)</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US">{</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> //create a dataset</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> DataSet ds=new DataSet("XMLProducts");</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> //connect to the northwind database and </span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> //select all of the rows from products table and from suppliers table</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> //make sure your connect string matches your server configuration</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> SqlConnection conn=new SqlConnection</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> (@"server=GLYNNJ</span><span lang="EN-US" style="FONT-FAMILY: 'Baskerville BE Regular'">_</span><span lang="EN-US">CS\NetSDK;uid=sa;pwd=;database=northwind");</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> SqlDataAdapter daProd=new SqlDataAdapter("SELECT * FROM products",conn);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> SqlDataAdapter daSup=new SqlDataAdapter("SELECT * FROM suppliers",conn);</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> //Fill DataSet from both SqlAdapters</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> daProd.Fill(ds,"products");</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> daSup.Fill(ds,"suppliers");</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> //Add the relation</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> ds.Relations.Add(ds.Tables["suppliers"].Columns["SupplierId"],</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> ds.Tables["products"].Columns["SupplierId"]);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> //Write the XML to a file so we can look at it later</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> ds.WriteXml("..\\..\\..\\SuppProd.xml",XmlWriteMode.WriteSchema);</span></p>
<p class="a6" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 13pt; FTEL: 18.45pt"><span lang="EN-US"> //load data into grid</span></p>
⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?