Web Forms :: Extension Methods And Customized Generic List Collections

Nov 19, 2011

How to use extension methods and customizes generic list collections??

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Similar Messages:

Web Forms :: Bind Value To Label Using Generic.Collections List?

Feb 25, 2011

i am trying to Bind value's to Label Using Generic List<>


returning all values sucessfulyy now how i Show these Values in Label


Label1.Text=???what it will be?

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Razor Support Of Generic Extension Methods?

Feb 11, 2011

With regards to the Razor view engine, say I want to render Html.TextBoxFor<SomeModel>(i => i.Name), it doesn't seem that the inline syntax works as in:

@Html.TextBoxFor<SomeModel>(i => i.Name)

This doesn't seem to work because it interprets the generic as an HTML tag. I could use a code-block approach, but then what's the best approach to output the content? The HTML string returned from this method, do I response.write it, or is there a syntax for it, or what's the approach?

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Forms Data Controls :: How To Bind Grid To Using System.Collections.Generic.List

Mar 25, 2011

I get this error when run the page

DataBinding: 'System.Int32' does not contain a property with the name 'item'.

protected void Page_Load(object sender, EventArgs e)
List<int> item = new List<int>();
GridView1.DataSource = item;
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" ShowFooter="true">
<asp:TemplateField HeaderText="Sub total">
<asp:Label ID="subTotalLabel" runat="server" Text='<%#Eval("item")%>' />
<asp:Label ID="grandTotalLabel" runat="server" />

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Use Generic Collections And List Effectively In Application?

Aug 19, 2010

How to use Generic collection and generic list effectively in a asp.net application i.e. web application.? Can we able to use Generic list in Dataset or Datatable or Datareader using to bind in Grid view?

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Custom Server Controls :: Using The Generic Type 'System.Collections.Generic.IEnumerable' Requires '1' Type Arguments

Nov 25, 2010

I'm trying to create a control out of a class I found, and one of the overridden functions is the following:

protected override void PerformDataBinding(IEnumerable data)

However, when I try to build the control I'm getting the error as shown in the subject. I've tried searching, and it seems the signature for the original function matches the one I have, and all other solutions I've seen uses the same signature.

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Web Forms :: How To Change This Methods In To Use Dictionary Or Extension Methods

Jul 23, 2010

public class CacheHelper { /// <summary> /// Removes object with the specified key. /// </summary> /// <param name="key">The key.</param> [code]....

I have this methods for caching..I need to change this methods to use in aDictionary<string,object>

How do I need to change this code Because I am new to asp.net I am still learning..

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Using Extension Methods In Static Methods On Extended Classes?

Aug 16, 2010

I have an extension method as follows:

public static class PageExtensions
public static int GetUserId(this Page targetPage)
var user = Membership.GetUser(targetPage.User.Identity.Name);
return (int)user.ProviderUserKey;

Now in a page I need to use this method in a static WebMethod, so I have added another 'extension method' to PageExtensions:

public static int GetUserId()
return (int)Membership.GetUser(HttpContext.Current.User.Identity.Name).ProviderUserKey;

and I call it as follows in my WebMethod: PageExtensions.GetUserId()

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MVC :: Method Not Found: 'System.Collections.Generic.IDictionary`2

Mar 10, 2010

I dont know what I have done but my add blog or news item functionality is broken. It works fine locally but not on the server (.net 3.5 mvc 2 I believe).


The interesting thing is the path P:Web_DevelopmentAHNDEVControllersAdministratorController.vb. This is my local path on my machine but not the

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The Model Item Passed Into The Dictionary Is Of Type 'System.Collections.Generic.Lis

May 2, 2010

Calling Index view is giving me this very very annoying error . Can anybody tell me what to do about it

Error:The model item passed into the dictionary is of type 'System.Collections.Generic.List1[MvcApplication13.Models.Groups]', but this dictionary requires a model item of type 'MvcApplication13.Helpers.PaginatedList1[MvcApplication13.Models.Groups]'.

public ActionResult Index(int? page)
const int pageSize = 10; [code].....

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C# Extension Methods For C# In General (.Net 3.5)?

Dec 6, 2010

I'm searching for some extension methods that helps programming in ASP.NET. Some functions to work on controls, validators, AJAX or programing in C# in general.It could be methods library or your own methods.Do you know any source of those methods (other than CodePlex - that is good source of generic extensions) especially for ASP.NET?

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MVC :: Create A Customized Dropdownlist Using "HtmlHelper" Extension Method?

Jun 8, 2010

i have defined a dropdown list in the controller


then i can show this dropdownlist in my "about" view <%=Html.DropDownList("a") %>.

BUT, now i want to define this dropdown list at my back end. what i want to do is to create a new "Helper".cs file in my project, and create a function within it. so every time if i want to show this dropdown list, i can just simply call this function instead of Add new SelectListItems one by one. is there anyone tell me how to do it?? and is it a good way to create a dropdownlist at the back end?

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C# - Enumerate Keys In In A System.Collections.Generic.Dictionary<string,string>?

Jan 26, 2011

At debug time I would like to see what are the keys in my InitParams collection - I can't seem to be able to list them.

EDIT:As Jon suggests below, this might be a bug within the Silverlight debugger. To reproduce, just create a new Silverlight Application within Visual Studio 2010 and just edit code

public partial class MainPage : UserControl
{ [code]...

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WebMatrix :: Interesting Problem About @ And Extension Methods?

Oct 22, 2010

Note , that i'm new to c# so it might not be a problem.first , what is the exact meaning of @ in Razor ?does it mean WebPage.Response.Write ?next, i designed an extension method to WebPage ( by the way that is the coolest feature ever in c# )in my Razor code , to use it in a webpage , i must write @this.MyExtensionMethod() instead of @MyExtensionMethod().So why is it? because @this.MyExtensionMethod() and @MyExtensionMethod() should be the same ?

here is my extension method :


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MVC :: How To Create An Extension To Extend The HtmlTextbox Methods

Sep 16, 2010

I am trying to create an extension to extend the HtmlTextbox methods to allow our developers to add onkeydown inline javascript to auto click a button with a name they specify.


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Configuration :: Unable To Access Extension Methods

Oct 14, 2010

I have a web site project using the .NET 2.0 Framework that I am working on in Visual Studio 2008. I am using a third-party DLL in my project. I have added a reference to the DLL in my project and I can use everything as expected, including a number of extension methods for certain objects. Intellisense sees these extension methods, and I am able to make use of them and I can build my project on my local machine without any errors.

However, when running my website on a production server, I get a Compilation Error saying that the extension method I am trying to use could not be found. I can use everything else in the DLL besides the extension methods on the production server.

This is my first exposure to extension methods and understand what they are, but I can't seem to figure out why I can't make use of these methods outside of my local machine.

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MVC :: Extension Methods To Search Jquery Grid?

Apr 5, 2010

I have jquery grid I need to search the grid results..

I thogught best method to search like string,bool, decimal, byte..

better to write the extension methods?how to write the extension methods to search the jquery grid using asp.net mvc control..

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MVC :: Wrap IsAjaxRequest() And Other Extension Methods With DI For Testability?

Mar 21, 2010

I'm using IOC containers that wrap items of HttpContext, such as Request and Session variables, to simplify mocking of it for testability.

Since IsAjaxRequest() is an extension method, it doesn't show up in HttpContext.Current.Request.

Is it possible to wrap extension methods with a IOC container? How?

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MVC :: UrlHelper Extension Methods For Areas (Best Practices)

Apr 20, 2010

In the previous version of our application we worked one we used MVC 1, so no area's. Following the ASP.NET MVC Best Practices by Kazi Manhur, I Created Extension methods of UrlHelper to generate your url from Route

Now with the new version, we are using MVC 2 and Areas. I was just wondering if one should implement it as before or have a new "best practice" regarding this emerged?

What I'm doing right now is:

1) Create a route in my area's route registration:


2) Creat an UrlHelper Extension method:


3) then just call it like this:


While typing this I started wondering what is the use of the ID you specify for the Area route..cant one just call the route using that?

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Use Extension Methods Inline In An ASPX Page?

Jan 15, 2010

Is it possible to do something like this inline in an ASPX page?

<%= Me.SomeExtensionMethod() %>

I can't seem to figure out how to get this to work properly. I'm receiving an error saying that "SomeExtensionMethod" is not a member of the current Page object. I've added the necessary <%@ Import Namespace="..." %> directive at the top of my page. This Does work in code-behind.This isn't vitally important, but it would be good to know how to do in the future.

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MVC :: Creating HTML Helpers With Extension Methods?

Oct 18, 2010

namespace MvcLogin_Validation.Helpers
public static class LabelExtensions


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Web Forms :: Adding List Items To Drop Down Control From Generic List?

Feb 6, 2010

I have the following Students class:


I need the 1 since it's a foreign key in another table. For the life of me, I can't get this to work like this.

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C# - How To Create A Extension Method To Sum Up A Column Of A Generic Constrained Type In A Datatable

Oct 1, 2010

Is something like the below possible?

public static T Sum<T>(this DataTable dt, string columnName)
where T : IEnumerable<decimal>, IComparable<decimal>[code]....

It feels like i'm almost there, but not quite :/

Just trying to sum up either decimal or int values in a column in datatable. Currently getting a compile error, however think this is due to the incorrect generic constraint.

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"GroupBy" And "OrderBy" Methods From LINQ As Extension Methods?

Mar 11, 2010

We say that "GroupBy" and "OrderBy" methods from LINQ as Extension Methods.Then how about "variable.ToString()" and "string.Split()" menthods. Are these Extension methods.

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MVC :: Does The Razor View Engine Support Generic Methods

Sep 3, 2010

Trying out the Razor view engine and for some reason my generic helper methods are breaking. For example:

public static class UrlHelperExtensions
public static string NonGenericHelper(this UrlHelper helper, Type controller)
return controller.Name;
public static string GenericHelper<TController>(this UrlHelper helper)
return typeof(TController).Name;

Works as expected:@Url.NonGenericHelper(typeof(ProjectEuler.UI.Models.Home))Breaks with the following exception:

"CS1502: The best overloaded method match for 'Microsoft.WebPages.WebPageUltimateBase.Write(Microsoft.WebPages.Helpers.HelperResult)'
has some invalid arguments"

The only workaround I could find is treating it as a "multi-token


Not sure if this is the intended behavior or just a bug but it would be nice to be able to call a generic method as you would a non generic one.

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