大约有 48,000 项符合查询结果（耗时：0.0616秒） [XML]
How do I sort an observable collection?
...
Sorting an observable and returning the same object sorted can be done using an extension method. For larger collections watch out for the number of collection changed notifications.
I have updated my code to improve performance (thanks to nawfal)...
Getting exact error type in from DbValidationException
...uation where I'm initializing my model in DatabaseInitializer() for EF 4.1 and get this annoying error "Validation failed for one or more entities. See 'EntityValidationErrors' property for more details." So, I go to this EntityValidationErrors and there is a field {System.Data.Entity.Validation....
What's a “static method” in C#?
...e class.
A static class is a class which can only contain static members, and therefore cannot be instantiated.
For example:
class SomeClass {
public int InstanceMethod() { return 1; }
public static int StaticMethod() { return 42; }
}
In order to call InstanceMethod, you need an instanc...
What does it mean to “program to an interface”?
I have seen this mentioned a few times and I am not clear on what it means. When and why would you do this?
32 Answers
...
How to handle checkboxes in ASP.NET MVC forms?
...ubmit" />
<%}%>
Your checkboxes are all called selectedObjects, and the value of each checkbox is the GUID of the corresponding object.
Then post to the following controller action (or something similar that does something useful instead of Response.Write())
public ActionResult ShowData...
When would you use delegates in C#? [closed]
...
Now that we have lambda expressions and anonymous methods in C#, I use delegates much more. In C# 1, where you always had to have a separate method to implement the logic, using a delegate often didn't make sense. These days I use delegates for:
Event handler...
Open a new tab in gnome-terminal using command line [closed]
I'm using Ubuntu 9.04 x64 and when I write:
10 Answers
10
...
How to for each the hashmap? [duplicate]
...lways come back to this same answer. Upvoted, because this is clean answer and this code is copy pasted to so many places in my projects, thanks!
– Katu
Jan 23 '15 at 10:53
10
...
How can I install MacVim on OS X?
...vim
Step 4. Run brew link macvim
You now have the latest versions of vim and macvim managed by brew. Run brew update && brew upgrade every once in a while to upgrade them.
This includes the installation of the CLI mvim and the mac application (which both point to the same thing).
I use t...
Windows Explorer “Command Prompt Here” [closed]
...requently find myself with a folder open in Windows, wishing to have a command prompt open with the same working directory.
...