Html helper Extension for get Id in Asp.net Mvc .

How to use Html.FieldIdFor in Asp.Net Mvc.(@Html.FieldIdFor(r=r.Id)).

1> Open a visual studio  add new Project.
2>Create a class file name it HtmlExtension.cs  and we write a logic for Html helper Extension.

3> File will create in Solution Explore of the project.


4> Now we will write a logic for HtmlExtension to get Id.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Web;
using System.Web.Mvc;

namespace ItsMe
{
    public static class HtmlExtension
    {
        public static string FieldIdFor<T, TResult>(this HtmlHelper<T> html, Expression<Func<T, TResult>> expression)
        {
            var id = html.ViewData.TemplateInfo.GetFullHtmlFieldId(ExpressionHelper.GetExpressionText(expression));
            return id.Replace('[', '_').Replace(']', '_');
        }
        public static string FieldNameFor<T, TResult>(this HtmlHelper<T> html, Expression<Func<T, TResult>> expression)
        {
            return html.ViewData.TemplateInfo.GetFullHtmlFieldName(ExpressionHelper.GetExpressionText(expression));
        }
    }

}

5> Name space required  for Html helper

using System.Linq.Expressions
using System.Web.Mvc


6> Save it


7> Create a  View to Test the Html helper Attribute is visible or not

8> Create Controller name sampleController , Index Action will generate
     In Index action --> right click of the mouse -> Add view option will  visible,
    View name:- Index -> select templete as a create -> Index page will autogenerate 
    Html Tags.
9> Now write @Html.FieldIdFor -> AI(Artificial Intelligence) will prepare to fire the
     query.  Look at an Image.


     

Author : praneet kumar

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