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POIs there a bug in MVC3 Razor @if
 

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  1. POIs there a bug in MVC3 Razor @if
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    <p>I have several form fields that may or may not need to be displayed, depending on the entity for which the form is loaded. So in my model I have boolean properties assigned accordingly.</p> <p>Each field in the form has a corresponding "label" (not an html Label). The following code hides the html input element, but not the label !?!?</p> <pre><code>&lt;!-- DBA: _________________ --&gt; &lt;tr&gt; &lt;td&gt; @if (Model.DisplayDBAField) { @Html.Raw("DBA:") } &lt;/td&gt; &lt;td&gt; @Html.TextBox("DoingBusinessAs", Model.DoingBusinessAs, new { style = string.Format("visibility: {0};", Model.DisplayDBAField ? "visible" : "hidden") }) &lt;/td&gt; &lt;/tr&gt; </code></pre> <p>In order to get the desired display, which is for both, the label and the input to not display, I had to rewrite the above as follows:</p> <pre><code>&lt;!-- DBA: _________________ --&gt; &lt;tr&gt; &lt;td&gt; @Html.Raw(Model.DisplayDBAField ? "DBA:" : "") &lt;/td&gt; &lt;td&gt; @Html.TextBox("DoingBusinessAs", Model.DoingBusinessAs, new { style = string.Format("visibility: {0};", Model.DisplayDBAField ? "visible" : "hidden") }) &lt;/td&gt; &lt;/tr&gt; </code></pre> <p>For some reason, the code block [ @if (Model.DisplayDBAField){} ] NEVER evaluates to true. Is this a Razor bug?, Visual Studio bug? Asp.Net bug?</p> <p>Per MilkyWayJoe's request: here's the code in the controller:</p> <pre><code>if (!string.IsNullOrEmpty(hiddenFields)) { profile.DisplayDBAField = !hiddenFields.Contains("DBA"); profile.DisplayVendorIDField = !hiddenFields.Contains("VendorID"); profile.DisplayContactNameFields = !hiddenFields.Contains("ContactName"); } </code></pre> <p>The code above works fine, I step through it and the fields are set/unset correctly. And here's the model:</p> <pre><code>public class ProfileModel { public EntityProfile Entity { get; set; } public bool DisplayDBAField { get; set; } public bool DisplayVendorIDField { get; set; } public bool DisplayContactNameFields { get; set; } public bool DisplayDistributionMethodField { get; set; } public bool DisplayCardPurposeField { get; set; } public ProfileModel() { DisplayDBAField = true; DisplayVendorIDField = true; DisplayContactNameFields = true; DisplayDistributionMethodField = true; DisplayCardPurposeField = true; } } </code></pre> <p>So the default constructor sets the flags to true, and the controller modifies the flags when appropiate. I also tried the following in the view:</p> <pre><code> &lt;td&gt; @if (!Model.DisplayDBAField) { @Html.Raw("DBA:") } &lt;/td&gt; </code></pre> <p>And found that regardless of the value in Model.DisplayDBAField, be it true or false, "DBA:" is NEVER rendered! So, whether I use @if (Model.DisplayDBAField){} or @if (!Model.DisplayDBAField){} it seems the code itself is completely ignored at runtime.</p>
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    1. PTQuestion
    1. USPaul Rivera
    1. USPaul Rivera
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    1. COWhat do you see if you write `@Model.DisplayDBAField`?
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      1. POIs there a bug in MVC3 Razor @if
      1. USSLaks
    2. COCan you post the code from your controller, specifically the part that writes into `DisplayDBAField`
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      1. POIs there a bug in MVC3 Razor @if
      1. USMilkyWayJoe
    3. COJust a note. Would it not be more logical to put the `@if` around the `<tr>` so you only need to check once?
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      1. POIs there a bug in MVC3 Razor @if
      1. USTim B James
 

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