Build web apps with Blazor Tutorial

Question

First I may not have had to ask this question if there was a sufficient search feature other than the limited Tags and if a question has an answer checkbox.

Exercise - Reuse components by creating a template

Adding:

[Parameter, EditorRequired] 

public required List

Answer 1

Thanks for posting your question in the Microsoft Q&A forum.

The error you're encountering is because the required keyword is a feature introduced in C# 11

• The ideal solution is to update your project to .NET 7 or 8, which fully support the required keyword. However, if you're following a tutorial specifically for .NET 6, this might not be the best option.
• If you're using .NET 6, you can modify the code to work without the required keyword:

    [Parameter, EditorRequired]
    public List<TItem> Items { get; set; }
    
    //in the constructor
    public PaginationComponent()
    {
        Items = new List<TItem>();
    }
    
  

• Another approach is to use a nullable type:

    [Parameter, EditorRequired]
    public List<TItem>? Items { get; set; }
    
    //check 
    if (Items != null)
    {
    // Use Items
    }
  

• If you really need to use the required keyword in .NET 6, you can enable C# 11 features by adding this to your .csproj file: xml <PropertyGroup> <LangVersion>11</LangVersion> </PropertyGroup>

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