一、题外话
接续上一篇：
public IModelBinder DefaultBinder
{
get
{
if (this._defaultBinder == null)
{
this._defaultBinder = new DefaultModelBinder();
}
return this._defaultBinder;
}
set
{
this._defaultBinder = value;
}
}
二、分析DefaultModelBinder
public class DefaultModelBinder : IModelBinder
{
public virtual object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext){}//其他方法我们暂时不分心，不止这一个方法
}
public virtual object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
EnsureStackHelper.EnsureStack();
if (bindingContext == null)
{
throw new ArgumentNullException("bindingContext");
}
bool flag = false;
if (!string.IsNullOrEmpty(bindingContext.ModelName) && !bindingContext.ValueProvider.ContainsPrefix(bindingContext.ModelName))
{//ValueProvider是一个IValueProvider的实例，我们下面分析一下这个东西
if (!bindingContext.FallbackToEmptyPrefix)
{
return null;
}
bindingContext = new ModelBindingContext
{
ModelMetadata = bindingContext.ModelMetadata,
ModelState = bindingContext.ModelState,
PropertyFilter = bindingContext.PropertyFilter,
ValueProvider = bindingContext.ValueProvider
};
flag = true;
}
if (!flag)
{
bool flag2 = DefaultModelBinder.ShouldPerformRequestValidation(controllerContext, bindingContext);
IUnvalidatedValueProvider arg_9B_0 = bindingContext.UnvalidatedValueProvider;
bool skipValidation = !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);
}
看看IValueProvider
public interface IValueProvider
{
/// <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>
bool ContainsPrefix(string prefix);
/// <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(string key);
}
可以看看这篇博文：http://www.cnblogs.com/artech/archive/2012/05/17/value-provider-01.html