今天在论坛遇到有人问如何在ASP.NET的数据控件中如何一次绑定多个表？这个问题，平时很少看到，一般在数据绑定之前，数据都是放在一个表中的，实际上，如果表之间存在关系，绑定多个表也是可以的。下面就是 DataSet中两个表进行绑定的例子。<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
System.Data.DataSet ds = new System.Data.DataSet();
System.Data.DataTable dataTable1 = new System.Data.DataTable("BlogUser");
System.Data.DataRow dr;
dataTable1.Columns.Add(new System.Data.DataColumn("UserId", typeof(System.Int32)));
dataTable1.Columns.Add(new System.Data.DataColumn("UserName", typeof(System.String)));
dataTable1.PrimaryKey = new System.Data.DataColumn { dataTable1.Columns["UserId"] };
for (int i = 0; i < 8; i++)
{
dr = dataTable1.NewRow();
dr[0] = i;
dr = "【孟子E章】" + i.ToString();
dataTable1.Rows.Add(dr);
}
System.Data.DataTable dataTable2 = new System.Data.DataTable("BlogArticle");
dataTable2.Columns.Add(new System.Data.DataColumn("ArticleId", typeof(System.Int32)));
dataTable2.Columns.Add(new System.Data.DataColumn("Title", typeof(System.String)));
dataTable2.Columns.Add(new System.Data.DataColumn("UserId", typeof(System.Int32)));
dataTable2.PrimaryKey = new System.Data.DataColumn { dataTable1.Columns["ArticleId"] };
Random rd = new Random();
for (int i = 0; i < 20; i++)
{
dr = dataTable2.NewRow();
dr[0] = i;
dr = "文章标题" + i.ToString();
dr = rd.Next(0, 7);
dataTable2.Rows.Add(dr);
}
ds.Tables.Add(dataTable1);
ds.Tables.Add(dataTable2);
System.Data.DataColumn parentColumn = ds.Tables["BlogUser"].Columns["UserId"];
System.Data.DataColumn childColumn = ds.Tables["BlogArticle"].Columns["UserId"];
System.Data.DataRelation user_article = new System.Data.DataRelation("UserId", parentColumn, childColumn);
ds.Relations.Add(user_article);
this.Repeater1.DataSource = ds.Tables["BlogArticle"].DefaultView;
this.Repeater1.DataBind();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>【孟宪会之精彩世界】- ASP.NET 绑定DataSet中的多个表 作者：孟子E章</title>
</head>
<body>
<form id="form1" runat="server">
<asp:Repeater ID="Repeater1" runat="server">
<HeaderTemplate>
<table border="1">
<tr style="background:orange">
<th>文章标题</th>
<th>用户ID</th>
<th>用户名</th>
</tr>
</HeaderTemplate>
<FooterTemplate>
</table></FooterTemplate>
<ItemTemplate>
<tr>
<td><%#Eval("Title")%></td><td><%#Eval("UserId") %></td>
<td><%#(Container.DataItem as System.Data.DataRowView).Row.GetParentRow("UserId")["UserName"]%>
</td>
</tr>
</ItemTemplate>
</asp:Repeater>
</form>
</body>
</html>
