ASP.NET MVC Razor 视图中的 Html.Raw() [英] Html.Raw() in ASP.NET MVC Razor view

问题描述

@{int count = 0;}@foreach(Model.Resources 中的 var 项){@(count <= 3 ? Html.Raw("
").ToString() : Html.Raw(""))//一些代码@(count <= 3 ? Html.Raw("</div>").ToString() : Html.Raw(""))@(计数++)}

此代码部分无法编译，出现以下错误

Error 18 无法确定条件表达式的类型，因为在 'string' 和 'System.Web.IHtmlString' 之间没有隐式转换 d:ProjectsIRC2011_HGIRC2011ViewsHome\_AllResources.cshtml 2124 IRC2011

我必须做什么?

解决方案

Html.Raw() 返回IHtmlString，而不是普通的string.因此，您不能将它们写在 : 运算符的相反侧.删除 .ToString() 调用

@{int count = 0;}@foreach(Model.Resources 中的 var 项){@(count <= 3 ? Html.Raw("
"): Html.Raw(""))//一些代码@(count <= 3 ? Html.Raw("</div>") : Html.Raw(""))@(计数++)}

顺便说一下，返回IHtmlString是MVC识别html内容的方式，不对它进行编码.即使没有引起编译器错误，调用ToString()也会破坏Html.Raw()

的含义

@{int count = 0;}
@foreach (var item in Model.Resources)
{
    @(count <= 3 ? Html.Raw("<div class="resource-row">").ToString() : Html.Raw("")) 
    // some code
    @(count <= 3 ? Html.Raw("</div>").ToString() : Html.Raw("")) 
    @(count++)

}

This code part does not compile, with the following error

Error   18  Type of conditional expression cannot be determined because there is no implicit conversion between 'string' and 'System.Web.IHtmlString'   d:ProjectsIRC2011_HGIRC2011ViewsHome\_AllResources.cshtml  21  24  IRC2011

What I must I do?

解决方案

Html.Raw() returns IHtmlString, not the ordinary string. So, you cannot write them in opposite sides of : operator. Remove that .ToString() calling

@{int count = 0;}
@foreach (var item in Model.Resources)
{
    @(count <= 3 ? Html.Raw("<div class="resource-row">"): Html.Raw("")) 
    // some code
    @(count <= 3 ? Html.Raw("</div>") : Html.Raw("")) 
    @(count++)

}

By the way, returning IHtmlString is the way MVC recognizes html content and does not encode it. Even if it hasn't caused compiler errors, calling ToString() would destroy meaning of Html.Raw()

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