Question

I have a database column ‘WantsReply’ that logically holds a boolean (bit) but is unfortunately implemented as an integer. Any nonzero value means ‘yes’ and zero means ‘no’.

If I write

class Entry {    [Column] public int WantsReply {get; set;} } 

in my model, and map it to a checkbox in the view using

Html.CheckBox( 'WantsReply', View.Model.WantsReply ) 

then I get a conversion error when I submit the view. On the other hand if I write

[Column] public bool WantsReply {get; set;} 

then the view submit works OK but then I get a different conversion error when I run a query like

from entry in Entries select entry; 

How can I resolve this impedance mismatch so that both queries and submits work?

Answer 1

Instead of changing the type of the column property, why not map it to a new property?

public partial class Entry {     public bool WantsReplyAsBool     {         get         {             return WantsReply != 0;         }         set         {             if (value)             {                 WantsReply = 1;             }             else             {                  WantsReply = 0;             }         }     }  } 

The integer property can be private, if you like. Use the bool property in your view.