[英]Asp.net mvc 3 - Custom model binding
I have a model like this 我有这样的模特
public string Name { get; set; }
public IEnumerable<int> ProjectMembersId { get; set; }
The property Name should be bound using the standart binding code. 应使用标准绑定代码绑定属性Name。
But the property ProjectMembersId should be bound using my custom code. 但属性ProjectMembersId应该使用我的自定义代码绑定。
So I derived a class from the DefaultModelBinder and overrided the SetProperty method. 所以我从DefaultModelBinder派生了一个类并重写了SetProperty方法。
protected override void SetProperty(ControllerContext controllerContext, ModelBindingContext bindingContext, System.ComponentModel.PropertyDescriptor propertyDescriptor, object value)
{
if (propertyDescriptor.Name == "ProjectMembersId")
{
var list = new List<int>(5);
var form = controllerContext.HttpContext.Request.Form;
var names = form.AllKeys.Where(x => x.StartsWith("dhxGridObj"));
foreach (var name in names)
{
int i;
if (int.TryParse(form.Get(name), out i))
{
list.Add(i);
}
}
value = list;
}
base.SetProperty(controllerContext, bindingContext, propertyDescriptor, value);
}
Bud the problem is the SetProperty method isn't called because the value provider doesn't contain an item called ProjectMembersId. 芽问题是没有调用SetProperty方法,因为值提供程序不包含名为ProjectMembersId的项。
Maybe I'm overriding a wrong part of the defaultModelBinder. 也许我正在覆盖defaultModelBinder的错误部分。 So what'd be the best way to go ?
那么最好的方式是什么?
Try it with BindProperty
method: 使用
BindProperty
方法尝试:
public class CustomModelBinder : DefaultModelBinder
{
protected override void BindProperty(ControllerContext controllerContext,
ModelBindingContext bindingContext,
System.ComponentModel.PropertyDescriptor propertyDescriptor)
{
if (propertyDescriptor.Name == "ProjectMembersId")
{
var list = new List<int>(5);
var form = controllerContext.HttpContext.Request.Form;
var names = form.AllKeys.Where(x => x.StartsWith("dhxGridObj"));
foreach (var name in names)
{
int i;
if (int.TryParse(form.Get(name), out i))
{
list.Add(i);
}
}
SetProperty(controllerContext, bindingContext, propertyDescriptor, list);
}
else
{
base.BindProperty(controllerContext, bindingContext, propertyDescriptor);
}
}
}
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