使用 __doPostBack() 进行回发时遇到错误

发布于 2024-09-29 12:06:07 字数 884 浏览 4 评论 0原文

我在回发时遇到 javascript 错误。代码如下：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="test" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Untitled Page</title>

    <script language="javascript" type="text/javascript">

function DoPostBack() 
{
    __doPostBack('Button2','My Argument');
}

    </script>

</head>
<body>
    <form id="form1" runat="server">
    <input type="button" id="Button2" value="Press me" onclick="DoPostBack()" />
    </form>
</body>
</html>

我收到以下错误：

Line: 13
Error: Object expected

我无法理解为什么会出现此错误。请帮忙...

原文

I am getting an error on javascript when doing post back. The code is as follows:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="test" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Untitled Page</title>

    <script language="javascript" type="text/javascript">

function DoPostBack() 
{
    __doPostBack('Button2','My Argument');
}

    </script>

</head>
<body>
    <form id="form1" runat="server">
    <input type="button" id="Button2" value="Press me" onclick="DoPostBack()" />
    </form>
</body>
</html>

I am getting the following error:

Line: 13
Error: Object expected

I can't understand why this error is coming. Kindly help...

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

乱世争霸 2024-10-06 12:06:07

您可以使用隐藏按钮来执行此任务

Button1.Attributes.CssAttributes.Add("Display","None");

隐藏按钮后

您可以从 javascript 调用其单击函数

document.getElementById('<%=Button1.ClientID%>').click();

这将在服务器上调用 Button1_Click

** 请记住设置 UseSubmitBehaviour=false 以使此功能在非IE 浏览器

希望有帮助:)

you can use a hidden button to do this task

Button1.Attributes.CssAttributes.Add("Display","None");

after hiding the button

you can call its click function from javascript

document.getElementById('<%=Button1.ClientID%>').click();

this will call Button1_Click on server

** remember to set UseSubmitBehaviour=false to make this work on non-IE browsers

hope that helps :)

回复收藏 0 原文

尝蛊 2024-10-06 12:06:07

默认情况下不创建 __doPostBack。如果页面没有导致回发的控件，则 ASP.NET 不会创建/生成此方法。
在您的情况下，您可以通过在 Page_Load 事件中添加以下行来强制 ASP.NET 生成 __doPostBack：

ClientScript.GetPostBackEventReference(this, string.Empty);

此行将强制创建此方法。

__doPostBack is not created by default. If the page does not have a control that causes a postback then ASP.NET does not create/generate this method.
In your case you can force ASP.NET to generate __doPostBack by adding the following line in you Page_Load event:

ClientScript.GetPostBackEventReference(this, string.Empty);

This line will force the creation of this method.

回复收藏 0 原文

森林散布 2024-10-06 12:06:07

默认情况下不创建 _doPostBack。当您使用 autoPostBack=true 添加控件或添加一些带有按钮的网格时，它会出现。
所以你的代码中没有生成 _doPostBack javascript。
如果您添加，

<asp:DropDownList ID="list" runat="server" AutoPostBack="true">
        <asp:ListItem Text="first"></asp:ListItem>
        <asp:ListItem Text="second"></asp:ListItem>
    </asp:DropDownList>

例如，您的代码就会起作用。
不知道它是否真的有用的代码:)但是。

_doPostBack isn't created by default. It appears when you are adding control with autoPostBack=true or adding some grid with buttons in it.
So there is no _doPostBack javascript generated in your code.
If you add

<asp:DropDownList ID="list" runat="server" AutoPostBack="true">
        <asp:ListItem Text="first"></asp:ListItem>
        <asp:ListItem Text="second"></asp:ListItem>
    </asp:DropDownList>

for instance your code will work.
Don't know if it is really useful code :) however.

回复收藏 0 原文

~没有更多了~