Comments on: Rendering and Binding Drop Down Lists using ASP.NET MVC 2 EditorFor http://www.nickriggs.com/posts/rendering-and-binding-drop-down-lists-using-asp-net-mvc-2-editorfor/ Making stuff up about web development since last week. Wed, 01 Sep 2010 20:57:44 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Nick Riggs http://www.nickriggs.com/posts/rendering-and-binding-drop-down-lists-using-asp-net-mvc-2-editorfor/comment-page-1/#comment-939 Nick Riggs Mon, 16 Aug 2010 19:51:58 +0000 http://nickriggs.com/?p=168#comment-939 I welcome feedback to anything I post - as long as it’s constructive and polite. However, your post is neither. Anti-Constructive: Here is a concept. Start a dialog about a different approach instead of just shooting off at the mouth. For example, when you say something like “which is just a no go in 99% of cases”. Perhaps you could explain why. That would make it a constructive comment and we could have one of those dialog things. Who knows – you could change my mind and I could update this 9 month old post. Anti-Polite: “completely USELESS” and “I really feel you made me waste my time”. Really? Do you think I get paid to share this stuff? I do it because I hope I can help folks the same way countless other blogs and open source projects have helped me. I’m well aware that I don’t bat 1.00. I would love to read your blog or see your open source commits. I really would – send me a link… but we both know that isn’t going to happen. You didn’t even have the guts to leave your real name or email on a flame comment. So, even though I would usually delete a comment like yours. I’m going to leave it. I think it’s important that others know exactly how not to leave a comment on a blog. I welcome feedback to anything I post – as long as it’s constructive and polite. However, your post is neither.

Anti-Constructive: Here is a concept. Start a dialog about a different approach instead of just shooting off at the mouth. For example, when you say something like “which is just a no go in 99% of cases”. Perhaps you could explain why. That would make it a constructive comment and we could have one of those dialog things. Who knows – you could change my mind and I could update this 9 month old post.

Anti-Polite: “completely USELESS” and “I really feel you made me waste my time”. Really? Do you think I get paid to share this stuff? I do it because I hope I can help folks the same way countless other blogs and open source projects have helped me. I’m well aware that I don’t bat 1.00. I would love to read your blog or see your open source commits. I really would – send me a link… but we both know that isn’t going to happen. You didn’t even have the guts to leave your real name or email on a flame comment.

So, even though I would usually delete a comment like yours. I’m going to leave it. I think it’s important that others know exactly how not to leave a comment on a blog.

]]> By: The angry guy http://www.nickriggs.com/posts/rendering-and-binding-drop-down-lists-using-asp-net-mvc-2-editorfor/comment-page-1/#comment-936 The angry guy Mon, 16 Aug 2010 15:15:33 +0000 http://nickriggs.com/?p=168#comment-936 I've been working on your solution for three hours now, until I realized it's completely USELESS. You're filling the ViewModel Movies property the hard way through the constructor, which is just a no go in 99% of cases. DropDownList values are normally filled from a DataSource that the ViewModel should not be aware of. So when you submit the form, there's just no SelectListItem values to be selected from. It's either null or Count == 0 depending where you try to override the DefaultModelBinder. I really feel you made me waste my time... I’ve been working on your solution for three hours now, until I realized it’s completely USELESS.

You’re filling the ViewModel Movies property the hard way through the constructor, which is just a no go in 99% of cases.

DropDownList values are normally filled from a DataSource that the ViewModel should not be aware of.

So when you submit the form, there’s just no SelectListItem values to be selected from. It’s either null or Count == 0 depending where you try to override the DefaultModelBinder.

I really feel you made me waste my time…

]]> By: sshabdali http://www.nickriggs.com/posts/rendering-and-binding-drop-down-lists-using-asp-net-mvc-2-editorfor/comment-page-1/#comment-890 sshabdali Tue, 10 Aug 2010 07:57:09 +0000 http://nickriggs.com/?p=168#comment-890 If i use EditorForModel() rather then EditorFor(m => m) no dropdown list appears. any idea why? If i use EditorForModel() rather then EditorFor(m => m) no dropdown list appears.

any idea why?

]]> By: Nick Riggs http://www.nickriggs.com/posts/rendering-and-binding-drop-down-lists-using-asp-net-mvc-2-editorfor/comment-page-1/#comment-233 Nick Riggs Sat, 17 Apr 2010 14:27:07 +0000 http://nickriggs.com/?p=168#comment-233 That’s a pretty interesting scenario. When you say “depending what has been passed in”, is it something in the Route or Request data? If it is, you could potential create a custom model binder for your type that that identifies and initializes the encapsulated list when the model is first instantiated. That’s a pretty interesting scenario. When you say “depending what has been passed in”, is it something in the Route or Request data? If it is, you could potential create a custom model binder for your type that that identifies and initializes the encapsulated list when the model is first instantiated.

]]> By: Tom Styles http://www.nickriggs.com/posts/rendering-and-binding-drop-down-lists-using-asp-net-mvc-2-editorfor/comment-page-1/#comment-232 Tom Styles Thu, 15 Apr 2010 14:48:24 +0000 http://nickriggs.com/?p=168#comment-232 Nick, Thanks for the tutorial. In your example you are using an unchanging list of movies. I have a case where the class has a different set of SelectListItems in it depending on what has been passed in. This means that you can't use your model binder to find the selected value because the collection of selectlistitems is blank. Can you think of a good way to solve this issue. I've had to go back to using the old ways for the time being but I'm keen on coming up with a good solution for using these new techniques when possible. Nick,

Thanks for the tutorial.

In your example you are using an unchanging list of movies. I have a case where the class has a different set of SelectListItems in it depending on what has been passed in. This means that you can’t use your model binder to find the selected value because the collection of selectlistitems is blank.

Can you think of a good way to solve this issue. I’ve had to go back to using the old ways for the time being but I’m keen on coming up with a good solution for using these new techniques when possible.

]]> By: Nick Riggs http://www.nickriggs.com/posts/rendering-and-binding-drop-down-lists-using-asp-net-mvc-2-editorfor/comment-page-1/#comment-230 Nick Riggs Mon, 01 Mar 2010 19:56:40 +0000 http://nickriggs.com/?p=168#comment-230 @Dave. I use the Required attribute the same way I would on any other property in my view model: [code lang="csharp"] [Required] [UIHint("List")] public IEnumerable<SelectListItem> Movies { get; private set; } [/code] Just make sure that the default "not-selected" option in the list has a value of "". @Dave. I use the Required attribute the same way I would on any other property in my view model:

[Required]
[UIHint("List")]
public IEnumerable<SelectListItem> Movies { get; private set; }

Just make sure that the default “not-selected” option in the list has a value of “”.

]]> By: Dave http://www.nickriggs.com/posts/rendering-and-binding-drop-down-lists-using-asp-net-mvc-2-editorfor/comment-page-1/#comment-229 Dave Sat, 27 Feb 2010 20:57:00 +0000 http://nickriggs.com/?p=168#comment-229 Any idea how you could add the Required attribute to your view model? Any idea how you could add the Required attribute to your view model?

]]> By: Rendering and Binding Drop Down Lists using ASP.NET MVC 2 … « 01Scripts.co.cc http://www.nickriggs.com/posts/rendering-and-binding-drop-down-lists-using-asp-net-mvc-2-editorfor/comment-page-1/#comment-228 Rendering and Binding Drop Down Lists using ASP.NET MVC 2 … « 01Scripts.co.cc Thu, 11 Feb 2010 18:55:30 +0000 http://nickriggs.com/?p=168#comment-228 [...] View post: Rendering and Binding Drop Down Lists using ASP.NET MVC 2 … [...] [...] View post: Rendering and Binding Drop Down Lists using ASP.NET MVC 2 … [...]

]]> By: Nick Riggs http://www.nickriggs.com/posts/rendering-and-binding-drop-down-lists-using-asp-net-mvc-2-editorfor/comment-page-1/#comment-227 Nick Riggs Wed, 27 Jan 2010 21:42:11 +0000 http://nickriggs.com/?p=168#comment-227 @WaywardMage Agreed. @WaywardMage Agreed.

]]> By: WaywardMage http://www.nickriggs.com/posts/rendering-and-binding-drop-down-lists-using-asp-net-mvc-2-editorfor/comment-page-1/#comment-226 WaywardMage Tue, 26 Jan 2010 19:08:09 +0000 http://nickriggs.com/?p=168#comment-226 Seems like the sort of think that should be built in already. Seems like the sort of think that should be built in already.

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