Default model binder in MVC Defaultmodelbinder

One, off-topic

Continuation of the previous article:

The process of binding an action parameter in MVC

 Public imodelbinder defaultbinder{    get    {        if (thisnull         {            thisnew   defaultmodelbinder();        }         return  This . _defaultbinder;    }     Set     {        this. _defaultbinder = value;    }} 

Second, analysisDefaultmodelbinder

 Public class defaultmodelbinder:imodelbinder{ Object bindmodel (ControllerContext controllercontext, Modelbindingcontext BindingContext){}//Other methods we are not distracted for the time being, more than this method}

 Public Virtual ObjectBindmodel (ControllerContext controllercontext, Modelbindingcontext bindingcontext) {EnsureStackHelper.Ens            Urestack (); if(BindingContext = =NULL)            {                Throw NewArgumentNullException ("BindingContext"); }            BOOLFlag =false; if(!string. IsNullOrEmpty (bindingcontext.modelname) &&!BindingContext. Valueprovider.                Containsprefix (Bindingcontext.modelname)) {//valueprovider is an example of Ivalueprovider, let's analyze it below. if(!bindingcontext.fallbacktoemptyprefix) {return NULL; } BindingContext=NewModelbindingcontext {modelmetadata=Bindingcontext.modelmetadata, Modelstate=bindingcontext.modelstate, PropertyFilter=Bindingcontext.propertyfilter, Valueprovider=Bindingcontext.valueprovider}; Flag=true; }            if(!flag) {                BOOLFlag2 =defaultmodelbinder.shouldperformrequestvalidation (ControllerContext, BindingContext); Iunvalidatedvalueprovider Arg_9b_0=Bindingcontext.unvalidatedvalueprovider; BOOLSkipvalidation =!Flag2; Valueproviderresult value=Arg_9b_0.getvalue (Bindingcontext.modelname, skipvalidation); if(Value! =NULL)                {                    return  This.                Bindsimplemodel (ControllerContext, BindingContext, value); }            }            if(!bindingContext.ModelMetadata.IsComplexType) {return NULL; }            return  This. Bindcomplexmodel (ControllerContext, BindingContext);}

Look at ivalueprovider .

     Public InterfaceIvalueprovider {/// <summary>Determines whether the collection contains the specified prefix.</summary>        /// <returns>True if the collection contains the specified prefix; otherwise, false.</returns>        /// <param name= "prefix" >The prefix to search for.</param>        BOOLContainsprefix (stringprefix); /// <summary>retrieves a value object using the specified key.</summary>        /// <returns>The value object for the specified key.</returns>        /// <param name= "key" >The key of the value object to retrieve.</param>Valueproviderresult GetValue (stringkey); }

Take a look at this blog post: http://www.cnblogs.com/artech/archive/2012/05/17/value-provider-01.html