This problem is rarely seen at ordinary times. Generally, data is stored in a table before data binding. In fact, if there is a relationship between tables, it is also possible to bind multiple tables. The following is an example of binding two tables in DataSet.
Copy codeThe Code is as follows: <% @ 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 [1] = "Chapter E of Mencius" + 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 = ableable2.newrow ();
Dr [0] = I;
Dr [1] = "article title" + I. ToString ();
Dr [2] = 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> multiple tables bound to DataSet by ASP. NET: Chapter E of Mencius </title>
</Head>
<Body>
<Form id = "form1" runat = "server">
<Asp: Repeater ID = "Repeater1" runat = "server">
<HeaderTemplate>
<Table border = "1">
<Tr style = "background: orange">
<Th> Article Title </th>
<Th> User ID </th>
<Th> User Name </th>
</Tr>
</HeaderTemplate>
<FooterTemplate>
</Table> </FooterTemplate>
<ItemTemplate>
<Tr>
<Td> <% # Eval ("Title") %> </td> <% # Eval ("UserId") %> </td>
<Td> <% # (Container. DataItem as System. Data. DataRowView). Row. GetParentRow ("UserId") ["UserName"] %>
</Td>
</Tr>
</ItemTemplate>
</Asp: Repeater>
</Form>
</Body>
</Html>
