problem when inheriting from ViewPage<> RSS

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  MVCNoob

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  problem when inheriting from ViewPage<>

  Aug 26, 2008 06:28 PM|LINK

  what is wrong with my code?  this was working in a previous release (was using <TViewData> before) , but in preview 4 it errors out...... 

   

  public class MyViewPage<TModel> : ViewPage<TModel>

  {   }

   

  Error    2    The type 'TModel' must be a reference type in order to use it as parameter 'TModel' in the generic type or method 'System.Web.Mvc.ViewPage<TModel>'    E:\Hosted-Projects\CSharpCMS\CSharpCMS.Core\MVC\CMSViewPage.cs    10    18    CSharpCMS.Core
  
  
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  levib

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  Microsoft

  Re: problem when inheriting from ViewPage<>

  Aug 26, 2008 06:50 PM|LINK

  The error message is telling you that you have to limit TModel to be a reference type.  To fix, see the highlighted code below:

  public class MyViewPage<TModel> : ViewPage<TModel> where TModel : class { }
  

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  MVCNoob

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  Re: problem when inheriting from ViewPage<>

  Aug 28, 2008 03:51 AM|LINK

   I've never seen that syntax before, I'll have to read up more into this.......

   

  thanks!
  

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  levib

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  Microsoft

  Re: problem when inheriting from ViewPage<>

  Aug 28, 2008 03:58 AM|LINK

  MVCNoob

  I've never seen that syntax before, I'll have to read up more into this.......

  If you're interested, there's a fairly good explanation at http://msdn.microsoft.com/en-us/library/d5x73970.aspx.