I am trying to find some examples of building a custom model binder for a unique binding scenario I need to handle, but all of the articles I found were for older versions of MVC which are no longer relevant in MVC2. I've been referencing the DefaultModelBinder source code to try to get a general feel for what I need to do, but it's entirely more complicated than my scenario and I'm having trouble isolating the specific logic I need to implement.
My goal is to take a collection of Checkbox/Textbox pairs and for all of the Checked pairs I would like to create a key/value pair of the Checkbox's value and the associated Textbox's value. After aggregating this data I need to do some string serialization on the collection so I can store it in a string property of the desired Model type. I already the data being sent from the form in a manageable format which will allow me to relate a given Checkbox to a specific Textbox, it's just a matter of figuring out how to get all the pieces where I need them.
Does anyone know of some up-to-date tutorials that can get me started with building a custom model binder?
I don't know why you think a lot has changed since MVC 1 regarding custom model binders. But If I understand what you are trying to do, it should be fairly easy.
public class CustomModelBinder : DefaultModelBinder {
public override object BindModel(ControllerContext controllerContext,
ModelBindingContext bindingContext) {
NameValueCollection form = controllerContext.HttpContext.Request.Form;
//get what you need from the form collection
//creata your model
SomeModel myModel = new SomeMode();
myModel.Property = "value";
//or add some model errors if you need to
ModelStateDictionary mState = bindingContext.ModelState;
mState.Add("Property", new ModelState { });
mState.AddModelError("Property", "There's an error.");
return myModel; //return your model
}
}
And your action :
public ActionResult Contact([ModelBinder(typeof(CustomModelBinder))]SomeModel m){
//...
}
Was that the kind of information you are looking for?