Question 87828 in ASP.NET Question posted in
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C# asp.net How can i single line else less if

<h3><%= User.Identity.IsAuthenticated ? true : User.Identity.Name; %></h3>

I’d like to write a one-line code that returns the member’s name when the member is already logged in.
But the IsAuthenticated code already returns true,
so do i need to use true ?
Also, I don’t want to do anything unless user not logged in.
in this case. When you want to write concise code in one line. Which code would be best?

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3

Answers


  1. 0

    you can use this <h3>@(User.Identity.IsAuthenticated ? User.Identity.Name :"")</h3>

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  2. 0

    You can use a conditional operator which has the form:

    condition ? consequent : alternative

    In your case this would be:

    <h3><%= User.Identity.IsAuthenticated ? User.Identity.Name : string.Empty; %></h3>
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  3. 0

    There is a better way that you can do this, By using Tag helper which explained in this article, you can rewrite your code like this:

    <h3 condition="User.Identity.IsAuthenticated">
  User.Identity.Name
</h3>

    Condition tag helper implementation is :

    using Microsoft.AspNetCore.Razor.TagHelpers;

namespace CustomTagHelpers.TagHelpers
{
    [HtmlTargetElement(Attributes = nameof(Condition))]
     public class ConditionTagHelper : TagHelper
    {
        public bool Condition { get; set; }

        public override void Process(TagHelperContext context, TagHelperOutput output)
        {
            if (!Condition)
            {
                output.SuppressOutput();
            }
        }
    }
}
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