asp.net - Usercontrol int property bind to a null value from database -

i have build usercontrol in asp.net, , there property following. works fine when bound value integer. however, if bound field return null database, return invalid cast error.

change nullable int not desirable because changes how programmer work control's property in code-behind.

just wonder how these things should implemented? thanks,

[defaultvalue(0)] public int fixedlo {         {         if (viewstate["fixedlo"] != null)             return convert.toint32(viewstate["fixedlo"]);         else             return 0;     }     set     {         if (value == null)             viewstate["fixedlo"] = 0;         else              viewstate["fixedlo"] = value;     } } 

would checking dbnull trick?

[defaultvalue(0)] public int fixedlo {         {         if (viewstate["fixedlo"] != null)             return convert.toint32(viewstate["fixedlo"]);         else             return 0;     }     set     {         if (value == null || value dbnull)             viewstate["fixedlo"] = 0;         else              viewstate["fixedlo"] = value;     } }