📄 masterdetail.aspx

📁 asp.net技术内幕的书配源码

💻 ASPX

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

<script runat=server>

void Page_Load(Object sender , EventArgs e) 
{
	if (! IsPostBack ) {
		SqlConnection conNorthwind;
		SqlCommand cmdSelect;
		SqlDataReader dtrCategories;

		conNorthwind = new SqlConnection( @"Server=localhost;Integrated Security=SSPI;Database=Northwind" );
		cmdSelect = new SqlCommand( "Select CategoryID, CategoryName From Categories", conNorthwind );
		conNorthwind.Open();
		dtrCategories = cmdSelect.ExecuteReader();

		dropCategories.DataSource = dtrCategories;
		dropCategories.DataTextField = "CategoryName";
		dropCategories.DataValueField = "CategoryID";
		dropCategories.DataBind();

		dropCategories.Items.Insert( 0, new ListItem( "none selected", "-1" ) );

		dtrCategories.Close();
		conNorthwind.Close();
	}
}


void BindProducts( int intCatID ) {
	SqlConnection conNorthwind;
	SqlCommand cmdSelect;
	string  strSelect;
	SqlDataReader dtrProducts;

	conNorthwind = new SqlConnection( @"Server=localhost;Integrated Security=SSPI;Database=Northwind" );
	conNorthwind.Open();

	strSelect = "Select ProductName, UnitPrice From Products Where CategoryID=@catID";
	cmdSelect = new SqlCommand( strSelect, conNorthwind );
	cmdSelect.Parameters.Add( "@catID", intCatID );
	dtrProducts = cmdSelect.ExecuteReader();

	rptProducts.DataSource = dtrProducts;
	rptProducts.DataBind();

	dtrProducts.Close();
	conNorthwind.Close();
}

void dropCategories_SelectedIndexChanged( object s, EventArgs e ) {
	int intCatID = System.Convert.ToInt32(dropCategories.SelectedItem.Value);
	if ( intCatID != -1 ) {
		BindProducts( intCatID );
	}
}

</Script>

<html>
<head><title>MasterDetail.aspx</title></head>
<body>
<form Runat="Server">

<b>Select Category:</b>
<asp:DropDownList
  ID="dropCategories"
  AutoPostBack="True"
  OnSelectedIndexChanged="dropCategories_SelectedIndexChanged"
  Runat="Server"/>

<p>

<asp:Repeater
  ID="rptProducts"
  EnableViewState="False"
  Runat="Server">

<ItemTemplate>
<li><%#DataBinder.Eval(Container.DataItem, "ProductName" ) %>
- <%# DataBinder.Eval( Container.DataItem, "UnitPrice" ) %>
</ItemTemplate>

</asp:Repeater>

</form>
</body>
</html>

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