Beginning ASP.NET 2.0 and Databases学习笔记（1）

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本文介绍了如何使用ASP.NET中的AccessDataSource控件从Access数据库中读取数据，并展示了一个具体的示例，包括设置数据源、定义查询命令及配置GridView显示产品信息。

Chapter 2：

使用AccessDataSource控件

示例：

<asp:AccessDataSource ID="NorthwindProductsAccDataSource" runat="server"

DataFile="~/App_Data/Northwind.mdb"

SelectCommand="SELECT * FROM [Products]"></asp:AccessDataSource>

<asp:GridView ID="NorthwindProductsGridVIew" runat="server"

AutoGenerateColumns="False"

DataKeyNames="ProductID"

DataSourceID="NorthwindProductsAccDataSource">

<asp:BoundField DataField="ProductID" HeaderText="ProductID"

InsertVisible="False"

ReadOnly="True"

SortExpression="ProductID" />

<asp:BoundField DataField="ProductName" HeaderText="ProductName"

SortExpression="ProductName" />

<asp:BoundField DataField="SupplierID" HeaderText="SupplierID"

SortExpression="SupplierID" />

<asp:BoundField DataField="CategoryID" HeaderText="CategoryID"

SortExpression="CategoryID" />

<asp:BoundField DataField="QuantityPerUnit"

HeaderText="QuantityPerUnit"

SortExpression="QuantityPerUnit" />

<asp:BoundField DataField="UnitPrice" HeaderText="UnitPrice"

SortExpression="UnitPrice" />

<asp:BoundField DataField="UnitsInStock" HeaderText="UnitsInStock"

SortExpression="UnitsInStock" />

<asp:BoundField DataField="UnitsOnOrder" HeaderText="UnitsOnOrder"

SortExpression="UnitsOnOrder" />

<asp:BoundField DataField="ReorderLevel" HeaderText="ReorderLevel"

SortExpression="ReorderLevel" />

<asp:CheckBoxField DataField="Discontinued"

HeaderText="Discontinued"

SortExpression="Discontinued" />

</Columns>

</asp:GridView>

或者用事件方法取得数量连接：

<asp:AccessDataSource ID="AccessDataSource1" runat="server"

DataFile="~/App_Data/Northwind.mdb"

SelectCommand="SELECT * FROM [Products]"

OnSelected="AccessDataSource1_Selected" >

</asp:AccessDataSource>

<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<script runat="server">

    Sub AccessDataSource1_Selected(ByVal sender As Object, ByVal e As
SqlDataSourceStatusEventArgs)
        If (Not e.Exception Is Nothing) Then
            If TypeOf e.Exception Is System.Data.OleDb.OleDbException Then
                Message.Text = "There was a problem opening a connection to the
database. Please contact the system administrator for this site."
                ' Optionally set GridView1.Visible = false
                e.ExceptionHandled = True
            End If
        End If
    End Sub
</script>
<html>