{ %>

<%= Html.Label("firstName", "First Name:") %>

<br />

<%= Html.TextBox("firstName")%>

<br /><br />

<%= Html.Label("lastName", "Last Name:") %>

<br />

<%= Html.TextBox("lastName")%>

<br /><br />

<input type="submit" value="Register" />

<% } %>

Here some problem may be.

But, when I extend the method, I have nothing that I can pass back as the first parameter - (which is of type HtmlHelper).

I've worked around it by overloading the static method in the custom helper class, but that is an inelegant solution. So, how would you unit test an extended html helper?

(And don't say, "Just use JavaScript" - that's a cheap answer.) :)

G

is working for me.

Best Regards,

Pritom Nandy

public static string Truncate(this HtmlHelper helper, string input, int length)

{

if (input.Length <= length)

{

return input;

}

else

{

return input.Substring(0, length) + "...";

}

}

can anyone help me?

Anyway add <add namespace="MvcApplication1.Helpers" /> to

configuration/system.web.webPages.razor/pages/namespaces

Further to itrond's point about returning MvcHtmlString instead of just string, this is because MVC will encode it. So if you want the string to be encoded continue to return a string.

To create a MvcHtmlString object you can use its static method like MvcHtmlString.Create()

Chad

Hi!

After adding the namespace "webapp.helpers" to my webconfig my helpers is work good. But they still are not available in my views. Please, help me!

I created a helper class to find date diff between two dates.

Its loading fine with post backs.

Issue is, when i click <a onclick="Calculate()">Calculate</a> which is a javascript fucntion posting the data by serialize(), and thus hitting a action method. In this process when i debug, my custom helper class is getting called and the updated result is sent back as part of rendered html. But, my view is not getting updated with latest o/p of helper class.

All i want to create is a helper class which should be independent of controller and should render the o/p based on the parameters passed.

View code:

@model CustomHtmlExtensionTest.Models.DateModels

@using MvcHtmlHelpers;

<script type="text/javascript">

function Calculate() {

var url = '@Url.Action("CalculateDateDiff", "Home")';

$.post(url, $("#Index").serialize(), function (data) {

$('#lblMessage').text(data);

});

}

</script>

@{

ViewBag.Title = "Home Page";

}

<h2>@ViewBag.Message</h2>

@using (Html.BeginForm("Index", "Home", FormMethod.Post, new { id="Index"}))

{

<table id="tblContent">

<tr>

<td style="width:40%">

From Date :

</td>

<td>

@Html.EditorFor(m => m.FrmDate) (MM/DD/YYYY)

@Html.ValidationMessageFor(m => m.FrmDate)

</td>

</tr>

<tr>

<td>

To Date :

</td>

<td>

@Html.EditorFor(m => m.ToDate) (MM/DD/YYYY)

@Html.ValidationMessageFor(m => m.ToDate)

</td>

</tr>

<tr>

<td colspan="2" align="center">

<label id="lblMessage">

@Html.CalculateDateDiff(Model.FrmDate, Model.ToDate)

</label>

</td>

</tr>

<tr>

<td colspan="2" align="center">

@*@Html.ActionLink("Calculate", "Index", "Home", new { Dates = Model.FrmDate.ToString() + "$" + Model.ToDate.ToString() }, null)*@

@*<input type="submit" value="Calculate" />*@

<a onclick="Calculate()">Calculate</a>

</td>

</tr>

</table>

<br />

}

Controller code:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using CustomHtmlExtensionTest.Models;

namespace CustomHtmlExtensionTest.Controllers

{

public class HomeController : Controller

{

public ActionResult Index()

{

ViewBag.Message = "MVC Custom Helper class Sample";

DateModels model = new DateModels();

return View(model);

}

//public ActionResult Index(string Dates)

//{

// DateModels model = new DateModels();

// if (Dates != null)

// {

// ModelState.Clear();

// string[] strDates = Dates.Split('$');

// model.FrmDate = strDates[0];

// model.ToDate = strDates[1];

// }

// ViewBag.Message = "MVC Custom Helper class Sample";

// return View(model);

//}

[HttpPost]

public ActionResult Index(DateModels model)

{

ViewBag.Message = "MVC Custom Helper class Sample";

return View(model);

}

public ActionResult About()

{

return View();

}

}

}

Helper class code:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Web.Mvc;

using System.Web;

namespace MvcHtmlHelpers

{

public static class MvcHtmlHelpers

{

public static MvcHtmlString CalculateDateDiff(this HtmlHelper helper, string strdate1, string strdate2)

{

try

{

int Years, Weeks, Months, Days;

DateTime date1, date2;

if ((strdate1 != "" || strdate1 != null) && (strdate2 != "" || strdate2 != null))

{

date1 = Convert.ToDateTime(strdate1);

date2 = Convert.ToDateTime(strdate2);

TimeSpan diff = date2 - date1;

Years = diff.Days / 366;

DateTime workingDate = date1.AddYears(Years);

while (workingDate.AddYears(1) <= date2)

{

workingDate = workingDate.AddYears(1);

Years++;

}

//months

diff = date2 - workingDate;

Months = diff.Days / 31;

workingDate = workingDate.AddMonths(Months);

while (workingDate.AddMonths(1) <= date2)

{

workingDate = workingDate.AddMonths(1);

Months++;

}

//weeks and days

diff = date2 - workingDate;

Weeks = diff.Days / 7; //weeks always have 7 days

Days = diff.Days % 7;

string strReturn = Years.ToString() + " Years " + Months.ToString() + " Months " + Weeks.ToString() + " Weeks " + Days.ToString() + " Days ";

return new MvcHtmlString(strReturn);

}

else

{

return new MvcHtmlString("Please enter Proper Dates");

}

}

catch (FormatException ex)

{

return new MvcHtmlString("Wrong date Format");

}

}

}

}

Please help me out.