asp.net ajax 1.0中detailview与updatepanel混合使用的例子

　   在asp.net ajax 1.0中，如果有一个detailview控件，想做到每点detailview中的每行，在旁边显示出这条记录的detail情况（master-detail的效果
的话），可以使用updatepanel控件实现
　　首先，创建一个自定义web控件webusercontrol,ascx,把detailviw控件放到updatepanel控件内，detailview控件如下
<asp:UpdatePanel ID="UpdatePanel1" runat="server" >
    <ContentTemplate>
        <asp:Label ID="Label1" runat="server" Text="作者的详细信息"></asp:Label><br />
        <asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" DataKeyNames="au_id"
            DataSourceID="SqlDataSource1" Height="50px" Width="438px">
            <Fields>
                <asp:BoundField DataField="au_id" HeaderText="au_id" ReadOnly="True" SortExpression="au_id" />
                <asp:BoundField DataField="au_lname" HeaderText="au_lname" SortExpression="au_lname" />
                <asp:BoundField DataField="au_fname" HeaderText="au_fname" SortExpression="au_fname" />
                <asp:BoundField DataField="phone" HeaderText="phone" SortExpression="phone" />
                <asp:BoundField DataField="address" HeaderText="address" SortExpression="address" />
                <asp:BoundField DataField="city" HeaderText="city" SortExpression="city" />
                <asp:BoundField DataField="state" HeaderText="state" SortExpression="state" />
                <asp:BoundField DataField="zip" HeaderText="zip" SortExpression="zip" />
                <asp:CheckBoxField DataField="contract" HeaderText="contract" SortExpression="contract" />
            </Fields>
        </asp:DetailsView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:pubsConnectionString %>"
            SelectCommand="SELECT * FROM [authors] where au_id=@authid">
            <SelectParameters>
                <asp:Parameter Name="authid" />
            </SelectParameters>
        </asp:SqlDataSource>
    </ContentTemplate>
</asp:UpdatePanel>  
其中用的是pubs数据库，这里用detailview控件根据主(master)gridview的author ID来显示其详细信息，还要为此控件加两个属性和一个方法，
public partial class WebUserControl : System.Web.UI.UserControl
{
   
    private string _authorID;
    //定义主键属性
    public string AuthorID
    {
        get { return _authorID; }
        set
        {
            _authorID = value;
            this.SqlDataSource1.SelectParameters["authid"].DefaultValue = _authorID;
            SqlDataSource1.DataBind();
        }
    }
    //定义UpdatePanel的更新模式
    public UpdatePanelUpdateMode UpdateMode
    {
        get { return this.UpdatePanel1.UpdateMode; }
        set { this.UpdatePanel1.UpdateMode = value; }
    }
    //定义更新方法
    public void Update()
    {
        //调用内容方法
        this.UpdatePanel1.Update();
    }
}
　　　
　然后在default.aspx中添加一个updatepanel和gridview，显示所有的作者
 <asp:ScriptManager ID="ScriptManager1" runat="server" />
        <div>
            <table style="width: 481px">
                <tr>
                    <td style="width: 240px">
                        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                            <ContentTemplate>
                        <asp:GridView ID="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False"
                            DataSourceID="SqlDataSource1" OnSelectedIndexChanged="GridView1_SelectedIndexChanged"
                            Width="243px" DataKeyNames="au_id">
                            <Columns>
                                <asp:CommandField ShowSelectButton="True" />
                                <asp:BoundField DataField="au_lname" HeaderText="au_lname" SortExpression="au_lname" />
                                <asp:BoundField DataField="au_fname" HeaderText="au_fname" SortExpression="au_fname" />
                            </Columns>
                        </asp:GridView>
                        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:pubsConnectionString %>"
                            SelectCommand="SELECT [au_lname], [au_fname], [au_id] FROM [authors]"></asp:SqlDataSource>
                            </ContentTemplate>
                        </asp:UpdatePanel>
                    </td>
                    <td>
                        <uc1:WebUserControl id="WebUserControl1" runat="server">
                        </uc1:WebUserControl></td>
并且要写gridview的selectedindexchanged事件，当用户选择了某位作者后，可以马上在webusercontrol控件中显示出其详细信息
  protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
    {
        //判断是否选中了GridView
        if (GridView1.SelectedIndex == -1)
        {
            WebUserControl1.AuthorID = GridView1.DataKeys[0].Value.ToString();
        }
        else
        {
            WebUserControl1.AuthorID = GridView1.DataKeys[GridView1.SelectedIndex].Value.ToString();
        }
        //必须将更新控件的模式设置为"conditional"
        WebUserControl1.UpdateMode = UpdatePanelUpdateMode.Conditional;
        //更新数据
        WebUserControl1.Update();
    }