使用 Razor，如何将布尔值呈现为 JavaScript 变量？
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Using Razor, how do I render a Boolean to a JavaScript variable?
提问by Nikos
How do I render a Boolean to a JavaScript variable in a cshtml file?
如何在 cshtml 文件中将布尔值呈现给 JavaScript 变量？
Presently this shows a syntax error:
目前这显示了一个语法错误：
<script type="text/javascript" >
var myViewModel = {
isFollowing: @Model.IsFollowing // This is a C# bool
};
</script>
回答by another_user
You may also want to try:
您可能还想尝试：
isFollowing: '@(Model.IsFollowing)' === '@true'
and an ever better way is to use:
更好的方法是使用：
isFollowing: @Json.Encode(Model.IsFollowing)
回答by Lucero
The JSON boolean must be lowercase.
JSON 布尔值必须为小写。
Therefore, try this (and make sure nto to have the //comment on the line):
因此，试试这个（并确保没有//注释就行了）：
var myViewModel = {
isFollowing: @Model.IsFollowing.ToString().ToLower()
};
Or (note: you need to use the namespace System.Xml):
或者（注意：您需要使用命名空间System.Xml）：
var myViewModel = {
isFollowing: @XmlConvert.ToString(Model.IsFollowing)
};
回答by Marc L.
Because a search brought me here: in ASP.NET Core, IJsonHelperdoesn't have an Encode()method. Instead, use Serialize(). E.g.:
因为搜索将我带到这里：在 ASP.NET Core 中，IJsonHelper没有Encode()方法。相反，使用Serialize(). 例如：
isFollowing: @Json.Serialize(Model.IsFollowing)
回答by gdoron is supporting Monica
var myViewModel = {
isFollowing: '@(Model.IsFollowing)' == "True";
};
Why Trueand not trueyou ask... Good question:
Why does Boolean.ToString output "True" and not "true"
为什么True而不是true你问......好问题：
为什么 Boolean.ToString 输出“真”而不是“真”
回答by Stuart Hallows
Here's another option to consider, using the !! conversion to boolean.
这是另一个需要考虑的选项，使用 !! 转换为布尔值。
isFollowing: !!(@Model.IsFollowing ? 1 : 0)
This will generate the following on the client side, with 1 being converted to true and 0 to false.
这将在客户端生成以下内容，1 转换为 true，0 转换为 false。
isFollowing: !!(1) -- or !!(0)
回答by marxlaml
A solution which is easier to read would be to do this:
一个更容易阅读的解决方案是这样做：
isFollowing: @(Model.IsFollowing ? "true" : "false")
