大约有 41,000 项符合查询结果（耗时：0.0398秒） [XML]
C# Entity-Framework: How can I combine a .Find and .Include on a Model Object?
...
You have to cast IQueryable to DbSet
var dbSet = (DbSet<Item>) db.Set<Item>().Include("");
return dbSet.Find(id);
share
|
...
PostgreSQL query to return results as a comma separated list
...e taking an int for its first argument so I did something like: string_agg(CAST(id as varchar), ',') instead.
– JZC
Jun 22 '15 at 17:24
17
...
How do I convert a NSString into a std::string?
...hiljordan.eu it could also be that the NSString is nil. In such a case the cast should be done like this:
// NOTE: if foo is nil this will produce an empty C++ string
// instead of dereferencing the NULL pointer from UTF8String.
This would lead you to such a conversion:
NSString *foo = @"Foo";
std...
How to create own dynamic type or dynamic object in C#?
...
Anyone know why we have to type cast to access the Add method? That seems strange to me.
– Vimes
Aug 20 at 16:24
...
Is there StartsWith or Contains in t sql with variables?
...xpress Edition%'
Example:
DECLARE @edition varchar(50);
set @edition = cast((select SERVERPROPERTY ('edition')) as varchar)
DECLARE @isExpress bit
if @edition like 'Express Edition%'
set @isExpress = 1;
else
set @isExpress = 0;
print @isExpress
...
How to clone ArrayList and also clone its contents?
... fields
They don't throw unnecessary checked exceptions
They don't require casts.
Consider another benefit of using copy constructors: Suppose you have a HashSet s, and you want to copy it as a TreeSet. The clone method can’t offer this functionality, but it’s easy with a conversion constructo...
How to sum up elements of a C++ vector?
...he vector has float. The result can be subtly wrong, and the compiler will cast the result back up to a float without telling you.
– nneonneo
Feb 19 '13 at 3:30
...
What is a bus error?
...
In my case, a method static_casted a void * parameter to an object that stores a callback (one attribute points to the object and the other to the method). Then the callback is called. However, what was passed as void * was something completely differen...
How to round a number to n decimal places in Java
...hat he said to be honest. allocating objects is always more expensive than casting primitives and using static methods (Math.round() as opposed to decimalFormat.format()).
– Andi Jay
Jul 10 '12 at 14:35
...
Relational Database Design Patterns? [closed]
...plex SQL expressions. It make it easer to switch to another DBMS.
Does not cast hard on any data type. Another DBMS can not have this data type. FOr example Oracle daes not have a SMALLINT only a number.
I hope this is a good starting point.
...