CODEWITHSUNDEEP
c#.netasp.net-mvcasp.net-mvc-3linq
petko_stankoski
petko_stankoski

Reputation: 10713

For loop in a view

I have this code:

columns.ForeignKey(p => p.SomeProperty, new SelectList(new[] {  "0", "1", "2", "3", "4", "5" }));

And I want to populate the SelectList dinamically, not always from 0 to 5. Let's say I have the upper limit saved in a Session["upperLimit"] variable. How to create a for loop in the view, so that the SelectList will go from 0 to Session["upperLimit"]?

Upvotes: 0

Views: 151

Answers (2)

Mathew Thompson
Mathew Thompson

Reputation: 56429

Well for starters, don't put the upper limit in the Session, if you need it in the view, the Model is the perfect use case for this. Secondly, the SelectList should also be contained in the Model really, saves you putting logic in the view and that means you don't even need the Limit in the Model.

Say your Model has these properties:

public class MyModel
{
    public string SomeProperty { get; set; }
    public SelectList MyNumbers { get; set; }
}

Then your controller action could do something like:

public ActionResult Index(int upperLimit) //I'm assuming that's where the limit is
{
    var model = new MyModel();

    model.MyNumbers = new SelectList(Enumerable.Range(0, upperLimit + 1));

    return View(model);
}

Then in your view do:

@Html.DropDownListFor(m => m.SomeProperty, Model.MyNumbers)

Upvotes: 1

Muhammad Hasan Khan
Muhammad Hasan Khan

Reputation: 35126

I would create the select list in the Controller and pass it to the view instead. View is for iterating the model. The business logic should be in controller.

However if you still want to do this in view you can do something like the following:

@{
    var list = new SelectList(Enumerable.Range(0, (int)Session["upperLimit"] + 1));
    columns.ForeignKey(p => p.SomeProperty, list);
}

Upvotes: 1

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