javascript 剃刀视图中<script>标签内的C#'if'关键字
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C# 'if' key word inside <script> tag in razor view
提问by gdoron is supporting Monica
I'm trying to write the following code inside ASP.Net-MVC razor view but the page won't compile.
我正在尝试在 ASP.Net-MVC razor 视图中编写以下代码,但该页面无法编译。
<script>
@(if (Model.IsValid))
{
("#ErrorMessage).text("Error");
}
else
{
("#Registration).text("Done!");
}
</script>
There are workarounds that I did to achieve that operation, but is there a simple way?
我做了一些变通方法来实现该操作,但有没有一种简单的方法?
回答by Darin Dimitrov
Try like this:
像这样尝试:
<script type="text/javascript">
@if (ViewData.ModelState.IsValid)
{
<text>$('#ErrorMessage').text('Error');</text>
}
else
{
<text>$('#Registration').text('Done!');</text>
}
</script>
Things to notice:
注意事项:
- usage of
ViewData.ModelState.IsValid
to test if there are modelstate errors - usage of the special
<text>
to indicate to the razor parser to use the text as is - usage of the
$
function as I suppose this is jQuery code - properly closing quotes around javascript strings
- usage of the
type="text/javascript"
attribute on the script tag.
- 的使用
ViewData.ModelState.IsValid
,以测试是否有错误的ModelState - 使用 special
<text>
来指示 razor 解析器按原样使用文本 $
函数的使用,因为我认为这是 jQuery 代码- 正确关闭javascript字符串周围的引号
- 使用
type="text/javascript"
脚本标签上的属性。
回答by Bochu
Here's a workaround that may look a little better:
这是一个看起来更好的解决方法:
<script>
var modelIsValid = '@ViewData.ModelState.IsValid' == '@true';
if(modelIsValid)
{
$("#ErrorMessage").text("Error");
}
else
{
$("#Registration").text("Done!");
}
</script>
Using '@true' makes sure that the true string is always correct (rather than hardcoding it like 'True').
使用 '@true' 可确保真正的字符串始终正确(而不是像 'True' 那样对其进行硬编码)。