Gonna make a page: koumei.co/ol cool !

Koumei’s experimental page is available here: http://koumei.net/html5.html

Nothing much currently. I am quite interested in creating the gradient background and rounded corner.

This page will be kept updating.

Thanks to Howie from states who provides me a shelter at this moment. koumei.net is homeless, desperate and depressed last night, but because of his kindly help that make me home again. Now let us say hello to koumei.net again on HelloVPS (HelloVPS.com).

hellovps

Given an extension on HtmlHelper: this extension will generate a list box in view based on the collection “cakes”. (Because I like cake, so I use dessert object as example

public static MvcHtmlString MyDropDownList(this HtmlHelper target, string controlName, IQueryable<Cake> cakes, object htmlAttr)
{
if (cakes== null)
return MvcHtmlString.Empty;
var cakesList = new SelectList(cakes, “Id”, “CakesName”);
return target.ListBox(controlName, cakesList, htmlAttr);
}

It is okay, but the main issue is if the when I specify the Model data on control name, it IS SUPPOSED to generate the list box with the data which retrieved from database are selected. Yes.  IT IS SUPPOSED TO BE. But, unfortunately, MVC fail to automatically bind data for us…  The data “cakesList” is showing properly, but with no preselect options. In most of the business logic, it’s not gonna work, because it is no point for user to re-select the options every time before save the data.

In this case, MVC is not gonna auto-bind the data for us, we just need to figure out another way to display and manipulate the data properly. So we will change something on the extension, view and the controller:

1. On the view, don’t specify the name to model’s name, For example, the data which will be weaved to list box is CakeViewData.CakeList, the data related to database is CakeViewData.Dessert.Cakes. Normally, we will use the extension to weave the data:

<%=Html.MyDropDownList(“Dessert.Cakes”, Model.CakeList, new { @class = “multiselect”, size = 5 })%>

Since MVC is not gonna take care of the data binding, The name (on parameter controlName) should and NEED to use other name instead. Change “Cakes” to any other name, for example, change to “MyCakes”:

<%=Html.MyDropDownList(“Dessert.MyCakes”, Model.CakeList, new { @class = “multiselect”, size = 5 })%>

2. Extension is changed to:

public static MvcHtmlString MyListBoxWithSelectedList(this HtmlHelper target, string name, IQueryable<Cake> cakes, List<string> selected, object htmlAttr)
{
if (interests == null)
return MvcHtmlString.Empty;
var cakeList = new MultiSelectList(cakes, “Id”, “CakeName”, selected);
return target.ListBox(name, cakeList, htmlAttr);
}

I just add a parameter “List<string> selected” in the extension which will be used in MultiSelectList object that can be bind to the the items to be selected.

3. In controller, before saving the data, need to use FormCollection or Request["Dessert.MyCakes"] to obtain the data “MyCakes” manually.

string myCakes = Request["Dessert.MyCakes"];
Dessert dessert = new Dessert{Cake = myCakes};

It might not be a bug actually. And in this example you can feel how flexibility that MVC can bring you: the way to manipulate the model or data varies! 

Happy programming in MVC 2!

500 Days of Summer is such a good movie, that let people think something seems meant to be, a decision, a response could easily make things different. But who knows? If everything is meant to be, why should we spending time to explore our life? In the story, Tom believe that the girl,whose name is Summer, is the one of his life, he spends his time with her, hanging out together, they seem like couple, lover. Summer gets merry, but her husband is not Tom. At the end of story, the movie mentions that Tom finally figure out that there is nothing meant to be, and he meets a girl who is a competitor of his new job.  Will Tom fall into another 500 days again? I hope not.

Good story , good movie and it is a real, or much closer to real life. I strongly recommend it.

Yummy!

All his life is dreaming of adventure, finally, he is taking off!

It is a moving story at the very beginning when he is living with his wife before the exploration. It’s pity that he can’t take his wife who encourage him to take the adventure

What’s the story of the movie? Well, I think pixar is gonna tell us, an adventure could be a lifetime, as long as you still dream of it. But it would become a true story when stop dreaming, just take off today!

Yummy foods and happy David’s big day!

(last updated: 31 Dec 09  21:01 GMT+8)

(last update: 21:07 GMT+8)

You guys are perfectly natural!

(last update: 21:10 GMT+8)

(last update: 21:19 GMT+8)

Aquavista in Dockland

City circle is from central city, its free. But sometimes it is crowded.

The photo is taken and owned by Mr Jones who is an enthusiast in photography. I “steal” some from his repository. *.*