JavaScript函数不返回值 [英] Javascript function does not return value
问题描述
我在主页上有一个按钮(授权)，该按钮引发事件.然后，基于子页面，我授权票证.但是，当有人单击授权按钮时，我也必须进行确认，然后禁用授权按钮，以避免多次单击.
这是母版页中的HTML
I have a button (authorise) in master page, which raises event. Then based on child page, I authorise the ticket. However when someone clicks on authorise button, I have to confirm as well and then disable authorise button to avoid multiple clicks.
Here is HTML in masterpage
<asp:ImageButton ID="imgAuthorise" runat="server" ImageUrl="~/Images/Authorise.png" TabIndex="-1" ToolTip="Authorise" Visible="False" OnClientClick="return ToggleButton()" />
JavaScript方法
JavaScript Method
function ToggleButton() {
var button = document.getElementById(event.srcElement.id);
var returnValue = true;
if (button.disabled) {
}
else {
var check = confirm('Are you sure that you want to authorise?');
if (check) {
button.disabled = true;
returnValue = true;
}
else {
button.disabled = false;
returnValue = false;
}
}
return returnValue;
}
现在，如果我用button.disabled注释行.函数返回正确的值，并且子页面成功执行事件.但是，如果我将button.disabled行放回去，则子页面不会订阅事件.
有人可以帮我吗?
Now, if I comment lines with button.disabled. function returns proper value and child page executes event successfully. However, if I place button.disabled lines back, then child page does not subscribe to event.
Can anyone help me please?
推荐答案
可以在调试器下运行它，也可以将其夹在try-catch块中以查看会发生什么.很可能找不到button元素，并且尝试取消引用未初始化的对象会导致异常.
—SA
Either run it under debugger or sandwich in try-catch block to see what happens. Most likely, thebuttonelement is not found, and the attempt to dereference non-initialized object causes exception.
—SA
hiii，
这是您的母版页代码，母版页上的授权"按钮希望它会回答.
hiii,
this is your master page code where authorise button on master page hope this will ans.
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs" Inherits="MasterPage" %>
<!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 runat="server">
<script type="text/javascript">
function ToggleButton() {
var button = document.getElementById('<%= imgAuthorise.ClientID %>');
var returnValue = true;
if (button.disabled) {
}
else {
var check = confirm('Are you sure that you want to authorise?');
if (check) {
returnValue = true;
}
else {
returnValue = false;
}
}
return returnValue;
}
</script>
<title></title>
<asp:ContentPlaceHolder ID="head" runat="server">
</asp:ContentPlaceHolder>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ImageButton ID="imgAuthorise" runat="server" ImageUrl="~/Images/Authorise.png" TabIndex="-1" ToolTip="Authorise" OnClientClick="return ToggleButton()" />
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
</div>
</form>
</body>
</html>
嗨！
谢谢您的帮助.我找到了解决办法
选中此链接
在我的情况下，它可以完美运行.
干杯
Hi!
Thanks for the help. I found solution
Check this link
It works perfectly in my situation.
Cheers
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