I want to show category name and there list of products dynamically using .NET core 8

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Hi everyone, I am trying to dispay products by thier categories using foreach loop. But my code still displaying duplicate categories.
I want to display Category heading then the products related to that category and so on.

The problem is, I am getting dulipcate categories.

Please help, thanks in advance

What I have tried:

@{
    var category= Model.Select(x=>x.Category).Distinct().ToList();
}

@foreach(var products in Model)
{
    @for(int i=0; i<category.Count; i++)
    {

     if (products.category== category[i])
     {
        <p>@products .category</p>
     }

     if (products.Category != category[i])
     {
       <p>text</p>
     }

    }
}

Posted 13-Sep-24 23:56pm

Hania Anum

Updated 14-Sep-24 7:09am

v2

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Dave Kreskowiak 14-Sep-24 11:14am

OK, and the problem is?

Hania Anum 14-Sep-24 17:06pm

I want to display Category heading then the products related to that category and so on.
The problem is, I am getting dulipcate categories.

2 solutions

Solution 1

Your code is displaying duplicate categories, probably because it's matching multiple entries in the category array. You have have duplicates in that array.

Also, if you a second IF statement you don't need at all. This can be removed:

C#

if (products.Category != category[i])
{
    <p>text</p>
}

Posted 14-Sep-24 11:57am

Dave Kreskowiak

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George Swan · Accepted Answer · 2024-09-15T01:29:00

Could I suggest that you use the Linq GroupBy method? Something along these lines. I have assumed that the Product class has a Name property.

@{
     var groups = Model.GroupBy(
     m => m.Category, //key 
     m => m.Product,//collection 'group'
     (key, g) => new { Category = key, Products= g });
}

@foreach (var group in groups)
   {
     <h2>@group.Category</h2>
     @foreach (var product in group.Products)
     {
      <p>@product.Name</p>
     }    
   }