如何从视图将字符串作为参数传递给javascript函数？
[英]How to pass a string as a parameter into a javascript function from a View?
问题描述
I've just started to work with ASP.NET MVC projects, I have gotten past the basics, but I came across with a problem recently, I can't pass a string as a id from a View. 
我刚刚开始使用ASP.NET MVC项目，已经了解了基础知识，但是最近遇到了一个问题，我无法从View传递字符串作为id。
So far, I've been passing the id to a javascript function like this: 到目前为止，我一直在将ID传递给这样的javascript函数：
<script>app.init( <%: ViewContext.RouteData.Values["id"].ToString() %>)</script>
This calls the following javascript function: 这将调用以下javascript函数：
var app = {};
(function (app) {
var _id;
app.init = function (id) {
_id = id;
}
app.id = function () {
return _id;
}
})(app);
I'm doing this because I need to work with the id to perform operations like submits and ajax calls in javascript (I prefer working with javascript). 我这样做是因为我需要使用id来执行诸如javascript中的Submit和ajax调用之类的操作（我更喜欢使用javascript）。
So far this has worked with int values, but when I tried to pass a string it fails. 到目前为止，这已经可以使用int值了，但是当我尝试传递字符串时，它失败了。 For example if I try to access to this url localhost:65097/Device/Edit/D2C02 it shows the following error: 例如，如果我尝试访问此URL localhost：65097 / Device / Edit / D2C02，则会显示以下错误：
SCRIPT5009: 'D2C02' is undefined
When I check the generated html code, the call to the function looked like this: 当我检查生成的html代码时，对该函数的调用如下所示：
<script>app.init(D2C02)</script>
Shouldn't the id be passed as 'D2C02' like a string, instead of just D2C02 like a variable? 难道不应该像字符串一样将ID作为'D2C02'传递，而不是像变量一样作为D2C02传递吗？ Because that's what I'm understading the browser thinks the id D2C02 represents. 因为这就是我要理解的，浏览器认为ID D2C02代表。 How can I make sure the id value is passed on to the javascript function as a string? 如何确定id值作为字符串传递给javascript函数？
3 个解决方案
解决方案1
2 已采纳 2013-01-25 19:07:53
ToString() just converts something to a string - but that's a C# string, not a JS string. ToString()只是将某些内容转换为字符串-但这是C＃字符串，而不是JS字符串。 So the easiest solution is to add quotes assuming the value can never contain quotes, too: 因此，最简单的解决方案是在假定值也不能包含引号的情况下添加引号：
<script>app.init("<%: ViewContext.RouteData.Values["id"].ToString() %>")</script>
If it may contain quotes you can either perform a simple replacement to backslash-escape them or run the string through a JSON serializer that takes care of turning it into a valid JavaScript string. 如果其中可能包含引号，则可以执行简单的替换以将其反斜杠转义，或者通过JSON序列化程序运行该字符串，以将其转换为有效的JavaScript字符串。
解决方案2
1 2013-01-25 19:13:14
Try 尝试
app.init("<%......%>"); app.init（“ <％......％>”）;
Otherwise you are just posting in a variable name and not string. 否则，您只是以变量名而不是字符串发布。 The ToString() method in c# doesn't wrap the vale in quotes C＃中的ToString（）方法不会将vale括在引号中
解决方案3
0 2013-01-25 19:13:33
The approach I would use is to do something like this, to make things a bit more semantic -- this is overly simplified to demonstrate: 我将使用的方法是执行类似的操作，使事情更具语义性-对此进行了过度简化以演示：
<body>
<input id="myId" type="hidden" value="<%: ViewContext.RouteData.Values["id"].ToString() %>" />
...
<script language="text/javascript">
function getId() {
return document.getElementById("myId").value;
}
</script>
</body>
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.