Question

Sorry for asking such a simple question but I lost really long time trying to solve this. At the end, I decide to ask you.

Let’s start with the code base :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace Navigation.Helpers
{
    public static class NavigationBarSE
    {
        public static MvcHtmlString RenderNavigationBarSE(this HtmlHelper helper, String[] includes)
        {
            return new MvcHtmlString("Y U no Work??");
            //NavTypeSE res = new NavTypeSE(includes);
            //String ress = res.toString();
            //return new MvcHtmlString(ress);

        }    
    }
}

In the original form, this helper needs to return a String that produced by the NavTypeSE class. But in the end, to get a result, I only want it to return a String for me… But it didn’t do that…

Before you ask, I can say that,

<add namespace="Navigation.Helpers"/>

exists in my Web.config file in Views folder.

For detailed information, my NavTypeSE class as below :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Navigation.Helpers
{
    //Creates a Navigation Menu Type which includes Previous, Next and Validate Buttons
        public class NavTypeSE
        {
        Boolean pr, nt, vld;
        Boolean Previous { get; set; }
        Boolean Next { get; set; }
        Boolean Validate { get; set; }
        public NavTypeSE(Boolean Previous, Boolean Next, Boolean Validate)
        {
            this.pr = Previous;
            this.nt = Next;
            this.vld = Validate;
        }
        public NavTypeSE() { }

        public NavTypeSE(String[] inc)
        {
            for(int i=0; i<inc.Length; i++)//foreach (String s in inc)
            {
                String s = inc[i]; // Don't need for foreach method.
                if (s.Equals("previous")||s.Equals("Previous"))
                {
                    this.pr = true;
                }
                else if (s.Equals("next") || s.Equals("Next"))
                {
                    this.nt = true;
                }
                else if (s.Equals("validate") || s.Equals("Validate"))
                {
                    this.vld = true;
                }
                else
                {
                    this.pr = false; this.nt = false; this.vld = false;
                }
            }

        public String toString()
        {
            return "Previous: " + this.pr + ", Next: " + this.nt + ", Validate: " + this.vld;
        }
    }
}

Also, in my View, I call this Helper like below :

@{
    String[] str = new String[] { "Previous", "next", "Validate" };
    Html.RenderNavigationBarSE(str);
}

This is just a base for a project. And I’m starter level in both C# and ASP.NET MVC Platform. Sorry for spending your time.

Answer 1

Your RenderNavigationBarSE writes nothing into the Response just returns a MvcHtmlString.

So you need to put an @ before the method call to tell Razor engine that you want to write the returned MvcHtmlString into the response (otherwise inside a code block it just executes your method and throws away the returned value)

@{
    String[] str = new String[] { "Previous", "next", "Validate" };
}

@Html.RenderNavigationBarSE(str);

You can read more about the Razor syntax:

• Introduction to ASP.NET Web Programming Using the Razor Syntax (C#)

• There is also a C# Razor Syntax Quick Reference