📄 datarelation.aspx

📁 asp.net技术内幕的书配源码

💻 ASPX

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<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>

<script runat=server>

void Page_Load(Object sender , EventArgs e) 
{
	DataSet dstNorthwind;
	SqlConnection conNorthwind;
	SqlDataAdapter dadNorthwind;

	// Grab the Categories and Products table
	dstNorthwind = new DataSet();
	conNorthwind = new SqlConnection( @"Server=localhost;Integrated Security=SSPI;Database=Northwind" );
	dadNorthwind = new SqlDataAdapter( "Select * From Categories", conNorthwind );
	conNorthwind.Open();
	dadNorthwind.Fill( dstNorthwind, "Categories" );
	dadNorthwind.SelectCommand = new SqlCommand( "Select * From Products", conNorthwind );
	dadNorthwind.Fill( dstNorthwind, "Products" );
	conNorthwind.Close();

	// Add Parent/Child Relationship
	dstNorthwind.Relations.Add( "Categories_Products", dstNorthwind.Tables["Categories"].Columns["CategoryID"], dstNorthwind.Tables["Products"].Columns["CategoryID"] );

	// Display each Category and Child Products
	foreach (DataRow drowParent in dstNorthwind.Tables["Categories"].Rows)
	{
		lblOutput.Text = "<h3>" + drowParent["CategoryName"] + "</h3>";
		foreach (DataRow drowChild in drowParent.GetChildRows( "Categories_Products" ))
		{
			lblOutput.Text = "<li>" + drowChild["ProductName"];
		}  
	}
}
</Script>

<html>
<head><title>DataRelation.aspx</title></head>
<body>

<asp:Label
  ID="lblOutput"
  Runat="Server" />

</body>
</html>

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