大约有 44,000 项符合查询结果（耗时：0.0452秒） [XML]
SqlException from Entity Framework - New transaction is not allowed because there are other threads
...
After much pulling out of hair I discovered that the foreach loops were the culprits. What needs to happen is to call EF but return it into an IList<T> of that target type then loop on the IList<T>.
Example:
IList<Client> clientList = from a in _dbFeed.Clie...
What are naming conventions for MongoDB?
Is there a set of preferred naming conventions for MongoDB entitites such as databases, collections, field names?
6 Answers...
How to pass an object from one activity to another on Android
... implemented Serializable interface to avoid any serialization exceptions. For example:
class MainClass implements Serializable {
public MainClass() {}
public static class ChildClass implements Serializable {
public ChildClass() {}
}
}
...
How to access app.config in a blueprint?
...state):
app = setup_state.app
api_blueprint.config = dict([(key,value) for (key,value) in app.config.iteritems()])
share
|
improve this answer
|
follow
|
...
Redis strings vs Redis hashes to represent JSON: efficiency?
...
It depends on how you access the data:
Go for Option 1:
If you use most of the fields on most of your accesses.
If there is variance on possible keys
Go for Option 2:
If you use just single fields on most of your accesses.
If you always know which fields are av...
How do I sort an NSMutableArray with custom objects in it?
...
Compare method
Either you implement a compare-method for your object:
- (NSComparisonResult)compare:(Person *)otherObject {
return [self.birthDate compare:otherObject.birthDate];
}
NSArray *sortedArray = [drinkDetails sortedArrayUsingSelector:@selector(compare:)];
NSSor...
Postgresql aggregate array
...
Thanks for contributing an answer to Stack Overflow!Please be sure to answer the question. Provide details and share your research!But avoid …Asking for help, clarification, or responding to other answers.Making statements based o...
How to get the selected index of a RadioGroup in Android
...adioGroup in Android or do I have to use OnCheckedChangeListener to listen for changes and have something that holds the last index selected?
...
Foreign Key to non-primary key
... data, and one of those rows needs to exist in another table. So, I want a foreign key to maintain referential integrity.
4...
Comparing Dates in Oracle SQL
...doing a string comparison; you're doing a date comparison. You should transform your string into a date. Either by using the built-in TO_DATE() function, or a date literal.
TO_DATE()
select employee_id
from employee
where employee_date_hired > to_date('31-DEC-95','DD-MON-YY')
This method h...