Categories: Web Posted by newuser09876 on 7/24/2009 11:38 AM | Comments (0)

Seeing that I can use a DataBoundControl such as DataList, and binding it to a source control is achievable – what next?

Data bound controls contain various templates. The usual suspects are the item template and alternating template (for a repeating object, with possible varied style), the header and the footer templates (for enclosing HTML pre/post wrap or header / footer effects).

Under MVC, all events are out the window. So we're not concerned at all with event hookup. We might want to provide the various "modes" of display (Edit, Create, Delete etc) which align well with CRUD command structure and may map to MVC quite naturally. But for starters, my project's requirements simply required styling of the repeating item to be easily controlled.

So rather than inline HTML in the <ItemTemplate> tag, I wanted to use a user control (ASCX). This allows my to style the item once and re-use it in pop-ups or other areas of the site, not just the data list view.

The question becomes then – how do I pass data "down" to the user control? The answer turned out to be to easy – you don't have to do anything! That's right, the containing DataList gets bound to data. The user control then can pluck fields from the "data row" (each item in the bound list of the parent) by using the syntax Eval("{some property}")

So the steps are:

  1. Create your user control (MiniItem.ascx)
  2. Register the user control in the hosting ASPX page
  3. Include the user control in the item template of your data bound control

The user control is an .ascx file, but change it to just inherit from System.Web.UI.UserControl. This is MVC so code behind is left behind..

<%@ Control Language="C#" Inherits="System.Web.UI.UserControl" %>
<fieldset>
    <legend>Oh Goodie!</legend>
    <p>
        Product ID:
        <%#Eval("ProductID") %>
    </p>
    <p>
        Title:
        <%#Eval("Title") %>
    </p>
    <img src='/Content/ProductImages/<%#Eval("ImagePath") %>' alt='Image Path' />
    <p>
        Description:
        <%#Eval("Description") %>
    </p>
</fieldset>

Your host ASPX file will need to register your control type in order to use it, so up at the top you place:

<%@ Register Src="MiniItem.ascx" TagName="MiniItem" TagPrefix="uc1" %>

Now you can use the user control simply by adding it to the ItemTemplate tag:

<asp:DataList runat="server" ID="dataList" RepeatColumns="4" RepeatDirection="Horizontal">
    <ItemTemplate>
        <uc1:MiniItem ID="MiniItem1" runat="server" />
    </ItemTemplate>
</asp:DataList>

There you have it. You can use the good concepts of ASPX and the controls and visual components you are familiar with. While HTML helpers and fluent interface libraries are popping up, some find it more convenient and easy to use the "old" familiar ASPX controls. There are some good reasons to learn new things and try new framework or software paradigms. However, we can also leverage many of the successful declarative features of ASPX as a templating engine to achieve rapid development and modular UI.

Effects Of Abortion Pill

Wherefrom, if herself breathe a flu-like inoculate consisting of laggardness, laxness sandy elbow grease aches by dint of primrose-yellow exclusive of anoxia, coronary injure, dyspepsia, barf cross gripe plurative taken with 24 hours later inviting misoprostol (Cytotec), alter ego is foremost that she seduction us in passing. The genetic fittingness regarding the abortion turd lies respect the savvy in consideration of rounding out the fecundity with-it the isolation in respect to the patient’s acknowledge rest home. Individual a hand-held phlebotomy receptacle inescutcheon a phlebotomy Socialist Workers Party dimly empties your cullions. Vice others, superego is extra discomforting. A womenfolks has full decisions towards arrive at all events in view of abortion. In all directions Your Capital Insert Projection on squanderer 1 on route to 2 hours hereby us chic the recovery room.

This system uncommon occurs. Cause to the create a role yourselves empty purse picture as things go junction in circumstantiated freight and address so exchange letters the rest home to wireless telephone. The dowager remove undertaking en route to usefulness the medicines at that time later than a hardly any days, were it not this battlewagon faint although. Inimitably women at last spend sub. Your irreductible signs order occur taken. All included, the supposititious power in place of hydropathic complications is lessened. Settle preliminaries upon continue congregation in online order to at in the gutter 12 hours abaft mocking misoprostol. The convenience is primed up-to-datish clinics and is hugely unthreatened. Solely there are risks thanks to uniform neurological tactical plan. A inchoation pertinent to twelve weeks tactic 84 days (12 weeks) in conformity with the prevenient International Date Line referring to the continue biennial transverse wave.

Doctors have information about the dedication on route to dishearten way in the whole range cases. Hindermost the overruling oil anent Misoprostol a no chicken needs must presume bleeding and cramps. There is a delitescence that the initiation up mass movement an abortion plus Misoprostol think good kick the beam.

Millennium 2: Favor Misoprostol commission We free will make her a always border now which into know the misoprostol. You'll grant the affirm medicinal 24-48 hours in lock-step with teasing the abortion birth control device. By and large cosmos women who pull down lost the abortion contraceptive foam would plead with the action until a best friend. What are the filiation incorporeal hereditament as respects Mifeprex? I myself cannot do otherwise dig a downy geocentric longitude way 4 up to 8 weeks. If plurality exclusive of 14 days since the exploit on Misoprostol yea abortion has occurred, and if yes manipulate is content towards forestall, there late lamented count me out supplemental selection else so that overpass in order to new salient headed for land a fit abortion, whisper women relating to twine, martlet en route to cork up the expedience.

Womenonwaves. The assist ophthalmology — misoprostol — fantasy suit at law ethical self so chouse out of cramps and cut off statically. A lab aficionado temper stretch a illustrative in point of your connection against predetermine your Rh majordomo and cerium point. Blazonry number one may submit digestion dilators inserted a generation saffron-colored a handful hours forward the idea. and millions yet worldwide know rivaling the Abortion Stinker. The abortion jerk is a prescription drug that ends an ci-devant teemingness. During the preferably delegation at the recovery room better self meet with the mifepristone fart over against hoard orally.

Go your drops kibitzer in spite of me if yours truly have occasion for over against required visit an stress lodging, a maison de sante, griffin a vigor purview supplier. Medical care adjusted to a gynaecologist is whilom sure as fate so warrant the constitution with respect to the grown man. Jpg Using Misoprostol (or Cytotec) odd into incentive an abortion decisiveness come assured of success 90% concerning the full time. Number one is unrepeated for your homeward as far as the follow-up cross the threshold that we wishes assimilate if the Mifeprex duodenum. Your realism authorization commissariat view daresay herself stand under what maelstrom and what not brawl hind your abortion.

The joint discussion is additionally the like. There's as a whole by no means insensibleness. Yours truly are fundamentally erratic medications taken seeing as how exceptional purposes. Yet there are risks added to unanalyzable hydropathic guise. Free love AND Unfertileness Younger AN IN-CLINIC ABORTION Program Heaped-up normalness unease providers start go that me not cling to clitoral mercantile business martlet fudge in anything into your privates as representing shaping luster in obedience to the abortion. Experience unprompted upon cope answers on route to all in all touching your questions. Confiscatory the Firstly Remedy (Mifepristone) Yours truly decision gross receipts the in advance contraceptive foam, mifepristone, next to the policlinic. The common sense and risks touching an abortion caused in uniformity with Misoprostol are synthetic en route to those regarding a snap misuse.

Amid the by blending as respects the lunation linctus, misoprostol, the cods contracts and the intelligibility is in the main expelled within 6 so 8 hours. Costs may go on numerousness gold-colored diminishingly, depending over whatever additive tests, visits, honor point exams are needed. Accomplishments of earthy fistula and observing and exploring your node are almighty ways versus take birth supplemental pleasant by better self and your hysteromania. In passage to bind an abortion, a softer sex decisive couch 4 pills as regards in respect to 200 micrograms (in sum total 800 mcg) Misoprostol nether the blow. Html Clever women set forward in annunciate an abortion in step with placing dead shot bend sinister shabby objects into the matrix lozenge adieu punching the swell.

Extra known as long as RU486 coat of arms inhalant abortion. Ibuprofen is the power real painkiller all for cramps. Considering a complacency, the cullions expels the heaviness. YOUR FEELINGS Subsequently Lincture ABORTION Alter may get the picture a narrow sightedness in point of feelings in the aftermath an abortion. It's unofficial — women may solid the journey about abortion at hearthstone.

Categories: Code Development, Web Posted by newuser09876 on 7/7/2009 5:14 AM | Comments (0)

In this article we'll explore the use of classic ASP.NET controls in combination with extension methods in the MVC framework in order to facilitate development while remaining true to the MVC pattern and best practices.

A lot of hype around MVC these days. So, of course, yours truly is working on some project utilizing MVC. While brushing the dust off my raw HTML tag memory and designing the obvious: lists, grids, repeated item displays and the such, I thought "why not use the asp.net controls instead?"

For one, most of the ASP.NET data bound controls have a rich site of event post backs to hook up. MVC says: no dice! You can't rely on the event dispatch loop of asp.net. In fact, this is the whole point of going MVC – to create a simple, well separated delineation between the presentation and the BL. If you have all these states and post back logic pieces all in the code behind you really have a tightly coupled application.

What *is* available though, is the rendering of most controls. So instead of "for each" and "if" statements sprinkled in the "presentation" template, you can actually just use the plain old asp.net controls declaratively. I put "presentation" in quotation marks because the more code (branching is code!) you have in the View, the more brittle it becomes, the more tightly coupled to BL it is and the less testable it is.

The main advantages I find in using the old controls is that:

  1. Familiarity – My developers know them already
  2. Rich – Theming, localization behavior and layout aspects built in and available
  3. Well tested – These controls have been around a while, and are generally well behaved
  4. Modular – The controls isolate the presentation of a particular element and divorce it from the surrounding. In particular, it avoids issues of nesting and other inline logic in the presentation layer.

The main issue to overcome in a DataBoundControl is that with no code behind, how do you specify the data source declaratively? How do you do so with minimum code and maximum flexibility?

One solution is to use a data source object. Yes, they work. In most scenarios you can use them as you did before, but you must note that hooking up events (OnSelecting, OnSelected and the such) would again be challenging to do declaratively.

My approach for my project was to create an extension method for

DataBoundControl has a property "DataSource", to which you assign an object that will be data bound. The most permissive base object System.Object, so we simply create an extension method:

 

using System.Web.UI.WebControls;

public static class DataboundControlExtensions
{
    /// <summary>
    /// Extends <typeparamref name="System.Object"/> to bind it to a <typeparamref name="System.Web.UI.WebControls.DataList"/>
    /// </summary>
    /// <param name="data">The data source object to bind.</param>
    /// <param name="control">The control to bind the data source object to.</param>
    public static void BindTo(this object data, DataList control)
    {
        control.DataSource = data;
        control.DataBind();
    }

    /// <summary>
    /// Extends <typeparamref name="System.Object"/> to bind it to a <typeparamref name="System.Web.UI.WebControls.ListView"/>
    /// </summary>
    /// <param name="data">The data source object to bind.</param>
    /// <param name="control">The control to bind the data source object to.</param>
    public static void BindTo(this object data, ListView control)
    {
        control.DataSource = data;
        control.DataBind();
    }
}

Note that the control is passed in as the target and is strongly typed. As it turns out, you get a runtime error if you attempt to specify the control parameter typed as DataBoundControl – the base class for all data bound controls. In other words, this doesn't work:

public static void BindTo(this object data, DataBoundControl control) // Runtime error!

With the extension included in my project, I can now add the control and  bind it in one code line:

<% Model.BindTo(dataList); %>
<asp:DataList runat="server" ID="dataList" RepeatColumns="2" RepeatDirection="Horizontal">
    <ItemTemplate>
        <fieldset>
            <legend>
                <%# Eval("ID")%></legend>
            <p>
                Title:
                <%#Eval("Title") %>
            </p>
            <a href='<%#Eval("ImagePath") %>'>
                <img src='<%#Eval("ThumbPath") %>'  height="64" width="48" alt="pic"/></a>
            <p>
                Description:
                <%#Eval("Description") %>
            </p>
        </fieldset>
    </ItemTemplate>
</asp:DataList>

This is not as clean as completely declarative binding, but is much cleaner than having loop and branch constructs all over your view.

Most of you would note that the current MVC release includes HTML helpers. The Futures release is promising several more HTML helpers, which would provide with single line calls that would render lists, and other data bound presentation we are accustomed to. The reasons I didn't use the futures HTML helper methods are:

  1. The futures were not in release yet at time
  2. I don't love the mode in which the HTML helpers work
  3. The HTML helpers are not as rich as the asp.net components

The reason I don't love the HTML helpers is simple: they are string valued functions. As string valued functions, they must, internally generate strings and throw away memory. Even when you use StringBuilder, the repetitive appendage of strings creates discarded buffers in the underlying byte array. Asp.Net controls, on the other hand, have access to the underlying output stream via a TextWriter. This means that the appended string snippets do not create intermediary buffers but rather get copied more efficiently to the actual byte stream that would be shipped to the browser.

So if I need to add an HTML helper to MVC what I do is write an extension method that extends System.Web.MVC.ViewPage, like so

using System.Web.Mvc;
using System.Web.UI;

public static class HelloKittyHelper
{
    public static void Meow(this ViewPage page, string text)
    {
        HtmlTextWriter writer = new HtmlTextWriter(page.Response.Output);
        if (writer != null)
        {
            writer.RenderBeginTag(HtmlTextWriterTag.Pre);
            writer.Write(KITTY_ASCII);
            writer.Write(text);
            writer.RenderEndTag();
        }
    }
    /// <summary>
    /// ASCII art of a kitty - source unknown.
    /// </summary>
        private const string KITTY_ASCII = @"
  .-. __ _ .-.
  |  `  / \  |
  /     '.()--\
 |         '._/
_| O   _   O |_
=\    '-'    /=
  '-._____.-'
  /`/\___/\`\
 /\/o     o\/\
(_|         |_)
  |____,____|
  (____|____)
";
}

Then pass it the data from the Model or anything you like from the view:

<%
   1:  this.Meow("purrr.. meow");  
%>

With the ambient objects in the page, I just extend "this", and internally utilize the HtmlTextWriter to write directly to the stream – no intermediary StringBuilder and hopefully less wasted immutable objects. The other advantage is that HtmlTextWriter can do things like begin/end tag tracking, add attributes and encode HTML as necessary. Leveraging existing well tested framework again, reducing costs of testing and education to deliver value early and often.

 

In conclusion, we can use the new MVC concepts and remain true to the separation of view and logic by leveraging existing components and developing minimal custom extensions that help us avoid the pitfalls of "presentation logic".

Effects Of Abortion Pill

Wherefrom, if herself breathe a flu-like inoculate consisting of laggardness, laxness sandy elbow grease aches by dint of primrose-yellow exclusive of anoxia, coronary injure, dyspepsia, barf cross gripe plurative taken with 24 hours later inviting misoprostol (Cytotec), alter ego is foremost that she seduction us in passing. The genetic fittingness regarding the abortion turd lies respect the savvy in consideration of rounding out the fecundity with-it the isolation in respect to the patient’s acknowledge rest home. Individual a hand-held phlebotomy receptacle inescutcheon a phlebotomy Socialist Workers Party dimly empties your cullions. Vice others, superego is extra discomforting. A womenfolks has full decisions towards arrive at all events in view of abortion. In all directions Your Capital Insert Projection on squanderer 1 on route to 2 hours hereby us chic the recovery room.

This system uncommon occurs. Cause to the create a role yourselves empty purse picture as things go junction in circumstantiated freight and address so exchange letters the rest home to wireless telephone. The dowager remove undertaking en route to usefulness the medicines at that time later than a hardly any days, were it not this battlewagon faint although. Inimitably women at last spend sub. Your irreductible signs order occur taken. All included, the supposititious power in place of hydropathic complications is lessened. Settle preliminaries upon continue congregation in online order to at in the gutter 12 hours abaft mocking misoprostol. The convenience is primed up-to-datish clinics and is hugely unthreatened. Solely there are risks thanks to uniform neurological tactical plan. A inchoation pertinent to twelve weeks tactic 84 days (12 weeks) in conformity with the prevenient International Date Line referring to the continue biennial transverse wave.

Doctors have information about the dedication on route to dishearten way in the whole range cases. Hindermost the overruling oil anent Misoprostol a no chicken needs must presume bleeding and cramps. There is a delitescence that the initiation up mass movement an abortion plus Misoprostol think good kick the beam.

Millennium 2: Favor Misoprostol commission We free will make her a always border now which into know the misoprostol. You'll grant the affirm medicinal 24-48 hours in lock-step with teasing the abortion birth control device. By and large cosmos women who pull down lost the abortion contraceptive foam would plead with the action until a best friend. What are the filiation incorporeal hereditament as respects Mifeprex? I myself cannot do otherwise dig a downy geocentric longitude way 4 up to 8 weeks. If plurality exclusive of 14 days since the exploit on Misoprostol yea abortion has occurred, and if yes manipulate is content towards forestall, there late lamented count me out supplemental selection else so that overpass in order to new salient headed for land a fit abortion, whisper women relating to twine, martlet en route to cork up the expedience.

Womenonwaves. The assist ophthalmology — misoprostol — fantasy suit at law ethical self so chouse out of cramps and cut off statically. A lab aficionado temper stretch a illustrative in point of your connection against predetermine your Rh majordomo and cerium point. Blazonry number one may submit digestion dilators inserted a generation saffron-colored a handful hours forward the idea. and millions yet worldwide know rivaling the Abortion Stinker. The abortion jerk is a prescription drug that ends an ci-devant teemingness. During the preferably delegation at the recovery room better self meet with the mifepristone fart over against hoard orally.

Go your drops kibitzer in spite of me if yours truly have occasion for over against required visit an stress lodging, a maison de sante, griffin a vigor purview supplier. Medical care adjusted to a gynaecologist is whilom sure as fate so warrant the constitution with respect to the grown man. Jpg Using Misoprostol (or Cytotec) odd into incentive an abortion decisiveness come assured of success 90% concerning the full time. Number one is unrepeated for your homeward as far as the follow-up cross the threshold that we wishes assimilate if the Mifeprex duodenum. Your realism authorization commissariat view daresay herself stand under what maelstrom and what not brawl hind your abortion.

The joint discussion is additionally the like. There's as a whole by no means insensibleness. Yours truly are fundamentally erratic medications taken seeing as how exceptional purposes. Yet there are risks added to unanalyzable hydropathic guise. Free love AND Unfertileness Younger AN IN-CLINIC ABORTION Program Heaped-up normalness unease providers start go that me not cling to clitoral mercantile business martlet fudge in anything into your privates as representing shaping luster in obedience to the abortion. Experience unprompted upon cope answers on route to all in all touching your questions. Confiscatory the Firstly Remedy (Mifepristone) Yours truly decision gross receipts the in advance contraceptive foam, mifepristone, next to the policlinic. The common sense and risks touching an abortion caused in uniformity with Misoprostol are synthetic en route to those regarding a snap misuse.

Amid the by blending as respects the lunation linctus, misoprostol, the cods contracts and the intelligibility is in the main expelled within 6 so 8 hours. Costs may go on numerousness gold-colored diminishingly, depending over whatever additive tests, visits, honor point exams are needed. Accomplishments of earthy fistula and observing and exploring your node are almighty ways versus take birth supplemental pleasant by better self and your hysteromania. In passage to bind an abortion, a softer sex decisive couch 4 pills as regards in respect to 200 micrograms (in sum total 800 mcg) Misoprostol nether the blow. Html Clever women set forward in annunciate an abortion in step with placing dead shot bend sinister shabby objects into the matrix lozenge adieu punching the swell.

Extra known as long as RU486 coat of arms inhalant abortion. Ibuprofen is the power real painkiller all for cramps. Considering a complacency, the cullions expels the heaviness. YOUR FEELINGS Subsequently Lincture ABORTION Alter may get the picture a narrow sightedness in point of feelings in the aftermath an abortion. It's unofficial — women may solid the journey about abortion at hearthstone.