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up vote 2 down vote favorite
3

I have a comma seperated string in a textbox, I want to pass this string as string array to an action method. Could any one tell me how can I acheive this. thanks.

I am using MVC 1.0.

Views:

<input type="text" name="fruits" /> -- Contains the comma seperated values

Action method

public ActionResult Index(string[] fruits)
{

}
share|improve this question
    
if you are using jQuery then i can suggest you a very simple way!! – Praveen Prasad Aug 8 '11 at 14:42
up vote 5 down vote accepted

You can create a custom model binder to achieve this. Create a class like this to do the split.

public class StringSplitModelBinder : IModelBinder
{
    #region Implementation of IModelBinder

    public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        if (!bindingContext.ValueProvider.ContainsKey(bindingContext.ModelName))
        {
            return new string[] { };
        }

        string attemptedValue = bindingContext.ValueProvider[bindingContext.ModelName].AttemptedValue;
        return !String.IsNullOrEmpty(attemptedValue) ? attemptedValue.Split(',') : new string[] { };
    }

    #endregion
}

Then you can instruct the framework to use this model binder with your action like this.

public ActionResult Index([ModelBinder(typeof(StringSplitModelBinder))] string[] fruits)
{
}

Instead of applying the ModelBinder attribute to action method parameters you can also register the custom model binder globally in the application start method of your Global.asax.

ModelBinders.Binders.Add(typeof(string[]), new StringSplitModelBinder());

This will split the single string value posted to the array you require.

Please note that the above was created and tested using MVC 3 but should also work on MVC 1.0.

share|improve this answer
    
Thanks, I will try this. – Lamps Aug 9 '11 at 15:22
    
Ok, please let me know whether it worked for you or not. – gusztav.varga.dr Aug 10 '11 at 9:14
    
I am getting this error.. System.Collections.Generic.IDictionary<string,System.Web.Mvc.ValueProviderResult‌​>' does not contain a definition for 'GetValue' and no extension method 'GetValue' accepting a first argument of type 'System.Collections.Generic.IDictionary<string,System.Web.Mvc.ValueProviderResul‌​t>' could be found (are you missing a using directive or an assembly reference?) – Lamps Aug 10 '11 at 11:24
    
I am using MVC 1.0 – Lamps Aug 10 '11 at 11:25
    
For fixing this I modified to use like this, bindingContext.ValueProvider[bindingContext.ModelName].AttemptedValue; – Lamps Aug 10 '11 at 11:49
up vote 4 down vote

Pass the string (with the commas) of your textbox directly to the controller action and create the array inside of the action.

public ActionResult Index(string fruits)
{
    var fruitsArray = fruits.Split(',');
    // do something with fruitArray
}
share|improve this answer
    
thanks... But I dont want this solution. Is there any other way? I know this solution. MY requirement is like that. I just want to know other ways of achieving this.. – Lamps Aug 8 '11 at 11:07
    
fruits is a parameter. Do you mean you can't modify the signature of the Index action? – Sandro Aug 8 '11 at 11:11
    
Yes. I dont want the signature of index. Because fruits ..etc paratmeters are persent in another business class.. – Lamps Aug 8 '11 at 12:35
    
When you can't modify the controller to change or overload the Index action, I only see a solution with JavaScript. Like here: stackoverflow.com/questions/309115/… - That way it can be accomplished, although I don't like it. – Sandro Aug 8 '11 at 13:01
    
Depending on the reason that you have a comma separated list, you could also repeat the input tag with one value per tag: <input name="fruit" value="apple" /><input name="fruit" value="orange" /> and then you will get an array in the controller called "fruit" – Jeremy Bell Aug 8 '11 at 16:06

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