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PONested partial output caching in ASP.NET MVC 3
 

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  1. PONested partial output caching in ASP.NET MVC 3
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    <p>I am using Razor view engine in ASP.Net MVC 3 RC 2. This is part of my view <code>city.cshtml</code></p> <p><strong>(drastically simplified code for the sake of simplicity in example)</strong></p> <pre><code>&lt;!-- in city.cshtml --&gt; &lt;div class="list"&gt; @foreach(var product in SQL.GetProducts(Model.City) ) { &lt;div class="product"&gt; &lt;div&gt;@product.Name&lt;/div&gt; &lt;div class="category"&gt; @foreach(var category in SQL.GetCategories(product.ID) ) { &lt;a href="@category.Url"&gt;@category.Name&lt;/a&gt; » } &lt;/div&gt; &lt;/div&gt; } &lt;/div&gt; </code></pre> <p>I want to cache this part of my output using OutputCache attribute, so I created an action <code>ProductList</code> with <code>OutputCache</code> attribute enabled</p> <pre><code>&lt;!-- in city.cshtml --&gt; &lt;div class="list"&gt; @Html.Action("ProductList", new { City = Model.City }) &lt;/div&gt; </code></pre> <p>and I created the view in <code>ProductList.cshtml</code> as below</p> <pre><code>&lt;!-- in ProductList.cshtml --&gt; @foreach(var product in Model.Products ) { &lt;div class="product"&gt; &lt;div&gt;@product.Name&lt;/div&gt; &lt;div class="category"&gt; @foreach(var category in SQL.GetCategories(product.ID) ) { &lt;a href="@category.Url"&gt;@category.Name&lt;/a&gt; » } &lt;/div&gt; &lt;/div&gt; } </code></pre> <p>but I still need to cache the <strong>category path</strong> output on each product. so I created an action <code>CategoryPath</code> with <code>OutputCache</code> attribute enabled</p> <pre><code>&lt;!-- in ProductList.cshtml --&gt; @foreach(var product in Model.Products ){ &lt;div class="product"&gt; &lt;div&gt;@product.Name&lt;/div&gt; &lt;div class="category"&gt; @Html.Action("CategoryPath", new { ProductID = product.ID }) &lt;/div&gt; &lt;/div&gt; } </code></pre> <p>But apparently this is not allowed. I got this error:</p> <blockquote> <p>OutputCacheAttribute is not allowed on child actions which are children of an already cached child action.</p> </blockquote> <p>I believe they have a good reason why they need to disallow this. I really want this kind of <em>nested Output Caching</em>.</p> <p>Any idea for a workaround?</p>
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    1. USAnwar Chandra
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    1. CO[Check out this link](http://blog.stevensanderson.com/2008/10/15/partial-output-caching-in-aspnet-mvc/)
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      1. USKorayem
 

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