How to write a custom `@Html.Partial()` method in ASP.NET MVC?

Question

I need to create a custom @Html.Partial() method.

Use Case

I have a .cshtml page where in I have multple sections like below

<!-- EDUCATION -->
@Html.Partial("Templates/Create/Modules/Education")

<!-- JOBS -->
@Html.Partial("Templates/Create/Modules/Jobs")

I want to be able to create a custom .Partial() method. Something on the likes of this

@Html.CustomPartial("Templates/Create/Modules/Jobs", "jobs", "edit")

where in the last two parameters are module id and action type id respectively. Using these values I will make a decision in my CustomPartial what I need to show in the output.

I am not sure how to go about this one. Please advice.

Or if someone can point me to the source code of the Html.Partial that too would be very helpful.

user3559349 · Accepted Answer · 2014-11-28 04:34:32Z

2

You can already do this using the overload of @Html.Partial() that accepts a ViewDataDictionary

@Html.Partial("Templates/Create/Modules/Jobs", new ViewDataDictionary { { "module", someValue }, {"edit", anotherValue }})

Then in the partial

@if(ViewData["module"] == someValue)
{
  // do something
}
else
{
  // do something else
}

And if your still interested, here is the source code

answered Nov 28, 2014 at 4:34

user3559349

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Comments

Yasser Shaikh · Accepted Answer · 2014-11-28 06:01:40Z

0

Here is what worked for me

public static class CustomHtmlHelpers
{
    public static MvcHtmlString RenderModule(this HtmlHelper helper,
                                             string partialViewName, 
                                             string moduleName,
                                             string actionType)
    {
        var isAccessAllowed = _someService.someMethod(userId, moduleName, actionType);    
        if (isAccessAllowed)
        {
            return helper.Partial(partialViewName);
        }
        else
        {
            return MvcHtmlString.Empty;
        }
    }
}

answered Nov 28, 2014 at 6:01

Yasser Shaikh

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2 Comments

user3559349 Over a year ago

If you intend to do it this way (that sort of logic does not belong in a html helper), why not use @Html.Action() which calls a child action method where you can perform the validation in the controller and return a corresponding view?

Yasser Shaikh Over a year ago

Nice. Thanks again, will think about this.

Aravinthan Purusothaman · Accepted Answer · 2018-12-13 05:12:06Z

0

      @Html.Partial("../Partial_views/_Menu_creation", new ViewDataDictionary { { "Type", 
     "Menu" }, { "Menu", "Dimensions" }, { "Active", "Yes" }, { "Icon", "icon-1" }, { 
     "data-hide", "" } })

In partial view
      @if (ViewData["Type"] == "Menu")
      {
         @if (ViewData["Active"] == "Yes")
          {
             <a data-check='@ViewData["Menu"]' role="button" class="active-menu">
               <b class='@ViewData["Icon"]'></b>
               <span>@ViewData["Menu"]</span>
            </a>
       }
       else
       {



    }
     }
     @if (ViewData["Type"] == "Heading")
     {
     }

This is working

answered Dec 13, 2018 at 5:12

Aravinthan Purusothaman

1

1 Comment

Brett Over a year ago

Can you update the formatting and give an explanation of what you changed to help OP

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