ScriptManager.RegisterAsyncPostBackControl(Control) 方法

参考

定义

命名空间:: System.Web.UI

程序集:: System.Web.Extensions.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

将控件注册为异步回发的触发器。

public:
 virtual void RegisterAsyncPostBackControl(System::Web::UI::Control ^ control);

public void RegisterAsyncPostBackControl (System.Web.UI.Control control);

abstract member RegisterAsyncPostBackControl : System.Web.UI.Control -> unit
override this.RegisterAsyncPostBackControl : System.Web.UI.Control -> unit

Public Sub RegisterAsyncPostBackControl (control As Control)

参数

control: Control

要为异步回发注册的控件。

例外

ArgumentNullException

control 为 null。

ArgumentException

将页面注册为异步回发控件。

或 -

注册的控件不实现 INamingContainer、IPostBackDataHandler 或 IPostBackEventHandler 接口。

示例

下面的示例演示如何调用 RegisterAsyncPostBackControl 方法来注册 Button 控件，以便它导致控件的内容更新 UpdatePanel 。控件 Button 不在控件内 UpdatePanel 。显示两个按钮： Button1 和 Button2。 Button1 刷新面板的内容，并 Button2 刷新整个页面。

<%@ 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)
    {
        ScriptManager1.RegisterAsyncPostBackControl(Button1);
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        Label1.Text = "Panel refreshed at " + DateTime.Now.ToString();
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        Label1.Text = "Page refreshed.";
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ScriptManager RegisterAsyncPostBackControl Example</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server"/>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
        <fieldset>
        <legend>Update Panel</legend>
        <asp:Label ID="Label1" runat="server">Initial postback occurred.</asp:Label>
        </fieldset>
        </ContentTemplate>
        </asp:UpdatePanel>
        <asp:Button ID="Button1" runat="server" Text="Update Panel" OnClick="Button1_Click" />
        <asp:Button ID="Button2" runat="server" Text="Refresh Page" OnClick="Button2_Click" />
        </div>
    </form>
</body>
</html>

<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C'DTD XHTML 1.0 Transitional'EN" 
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    Protected Sub Page_Load(ByVal Sender As Object, ByVal E As EventArgs)
        ScriptManager1.RegisterAsyncPostBackControl(Button1)
    End Sub

    Protected Sub Button1_Click(ByVal Sender As Object, ByVal E As EventArgs)
        Label1.Text = "Panel refreshed at " + DateTime.Now.ToString()
    End Sub

    Protected Sub Button2_Click(ByVal Sender As Object, ByVal E As EventArgs)
        Label1.Text = "Page refreshed."
    End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ScriptManager RegisterAsyncPostBackControl Example</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server"/>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
        <fieldset>
        <legend>Update Panel</legend>
        <asp:Label ID="Label1" runat="server">Initial postback occurred.</asp:Label>
        </fieldset>
        </ContentTemplate>
        </asp:UpdatePanel>
        <asp:Button ID="Button1" runat="server" Text="Update Panel" OnClick="Button1_Click" />
        <asp:Button ID="Button2" runat="server" Text="Refresh Page" OnClick="Button2_Click" />
        </div>
    </form>
</body>
</html>

下面的示例演示如何调用 RegisterAsyncPostBackControl 方法来注册用户控件，以便它导致控件的内容更新 UpdatePanel 。第一个示例显示使用用户控件的页面。第二个示例显示用户控件。


<%@ Page Language="C#" %>

<%@ Register Src="Controls/WebUserControl.ascx" TagName="WebUserControl"
    TagPrefix="uc1" %>

<!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)
    {
        ScriptManager1.RegisterAsyncPostBackControl(WebUserControl1);
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        Label1.Text = "Panel refreshed at " + DateTime.Now.ToString();
    }
    
    protected void WebUserControl1_Click(object sender, EventArgs e)
    {
        Label1.Text = "Panel refreshed at " + DateTime.Now.ToString() +
            ".  Welcome " + WebUserControl1.Name + ". ";
    }

</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ScriptManager RegisterAsyncPostBackControl Example</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:ScriptManager ID="ScriptManager1" runat="server" />
            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                    <fieldset>
                        <legend>Update Panel</legend>
                        <asp:Label ID="Label1" runat="server">Initial postback occurred.</asp:Label>
                    </fieldset>
                </ContentTemplate>
            </asp:UpdatePanel>
            <asp:Button ID="Button1" runat="server" Text="Update Panel" OnClick="Button1_Click" />
            <uc1:webusercontrol id="WebUserControl1" runat="server" oninnerclick="WebUserControl1_Click" />
        </div>
    </form>
</body>
</html>


<%@ Page Language="VB" %>

<%@ Register Src="Controls/WebUserControl.ascx" TagName="WebUserControl"
    TagPrefix="uc1" %>

<!DOCTYPE html PUBLIC "-'W3C'DTD XHTML 1.0 Transitional'EN" 
  "http:'www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    Protected Sub Page_Load(ByVal Sender As Object, ByVal E As EventArgs)
        ScriptManager1.RegisterAsyncPostBackControl(WebUserControl1)
    End Sub
    

    Protected Sub Button1_Click(ByVal Sender As Object, ByVal E As EventArgs)
        Label1.Text = "Panel refreshed at " + DateTime.Now.ToString()
    End Sub
    
    
    Protected Sub WebUserControl1_Click(ByVal Sender As Object, ByVal E As EventArgs)
        Label1.Text = "Panel refreshed at " + DateTime.Now.ToString() + _
            ".  Welcome " + WebUserControl1.Name + ". "
    End Sub
    

</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ScriptManager RegisterAsyncPostBackControl Example</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:ScriptManager ID="ScriptManager1" runat="server"/>
            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                    <fieldset>
                        <legend>Update Panel</legend>
                        <asp:Label ID="Label1" runat="server">Initial postback occurred.</asp:Label>
                    </fieldset>
                </ContentTemplate>
            </asp:UpdatePanel>
            <asp:Button ID="Button1" runat="server" Text="Update Panel" OnClick="Button1_Click" />
            <uc1:webusercontrol id="WebUserControl1" runat="server" oninnerclick="WebUserControl1_Click" />
        </div>
    </form>
</body>
</html>

注解

使用此方法 RegisterAsyncPostBackControl 可将 Web 服务器控件注册为触发器，以便它们执行异步回发而不是同步回发。当 ChildrenAsTriggers 控件的属性 UpdatePanel 设置为 true (这是默认) 时，控件内的 UpdatePanel 回发控件会自动注册为异步回发控件。

使用此方法将 RegisterAsyncPostBackControl 控件外部 UpdatePanel 的控件注册为异步回发的触发器，并可能更新更新面板的内容。若要以编程方式更新 UpdatePanel 控件，请调用 Update 该方法。

可以使用控件的UpdatePanel元素以声明方式Triggers添加触发器。在Visual Studio中，使用设计器的 UpdatePanelTrigger 集合编辑器 对话框。

适用于

通过

ScriptManager.RegisterAsyncPostBackControl(Control) 方法

定义

参数

例外

示例

注解

适用于

另请参阅

其他资源