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namespace System.Web.ModelBinding {
[AttributeUsage(AttributeTargets.Parameter, Inherited = false, AllowMultiple = false)]
public sealed class ViewStateAttribute : ValueProviderSourceAttribute {
public string Key {
get;
private set;
}
public ViewStateAttribute()
: this(null) {
}
public ViewStateAttribute(string key) {
Key = key;
}
public override IValueProvider GetValueProvider(ModelBindingExecutionContext modelBindingExecutionContext) {
if (modelBindingExecutionContext == null) {
throw new ArgumentNullException("modelBindingExecutionContext");
}
return new ViewStateValueProvider(modelBindingExecutionContext);
}
public override string GetModelName() {
return Key;
}
}
}
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