Created
November 7, 2013 14:15
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jbogard created this gist
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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,47 @@ public class BetterDefaultModelBinder : DefaultModelBinder { protected override object CreateModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Type modelType) { var model = base.CreateModel(controllerContext, bindingContext, modelType); if (model == null || model is IEnumerable) return model; foreach (var property in modelType.GetProperties(BindingFlags.Public | BindingFlags.Instance)) { object value = property.GetValue(model); if (value != null) continue; if (property.PropertyType.IsArray) { value = Array.CreateInstance(property.PropertyType.GetElementType(), 0); property.SetValue(model, value); } else if (property.PropertyType.IsGenericType) { Type typeToCreate; Type genericTypeDefinition = property.PropertyType.GetGenericTypeDefinition(); if (genericTypeDefinition == typeof(IDictionary<,>)) { typeToCreate = typeof(Dictionary<,>).MakeGenericType(property.PropertyType.GetGenericArguments()); } else if (genericTypeDefinition == typeof (IEnumerable<>) || genericTypeDefinition == typeof (ICollection<>) || genericTypeDefinition == typeof (IList<>)) { typeToCreate = typeof(List<>).MakeGenericType(property.PropertyType.GetGenericArguments()); } else { continue; } value = Activator.CreateInstance(typeToCreate); property.SetValue(model, value); } } return model; } }