大约有 6,000 项符合查询结果（耗时：0.0272秒） [XML]
Problem with converting int to string in Linq to entities
...
With EF v4 you can use SqlFunctions.StringConvert. There is no overload for int so you need to cast to a double or a decimal. Your code ends up looking like this:
var items = from c in contacts
select new ListItem
{
...
How to get the next auto-increment id in mysql
How to get the next id in mysql to insert it in the table
19 Answers
19
...
关于php的socket初探 - PHP - 清泛IT论坛，有思想、有深度
...些多路复用的模式中，异步阻塞/非阻塞模式的扩展性和性能最好。
引入阻塞/非阻塞,、同步/异步比喻很形象的一段话：
有A，B，C，D四个人在钓鱼：
A用的是最老式的鱼竿，所以呢，得一直守着，等到鱼上钩了再拉杆；
B的...
Assign null to a SqlParameter
...e ?: requirement.
You can use the ?? null-coalescing operator as follows
SqlParameter[] parameters = new SqlParameter[1];
SqlParameter planIndexParameter = new SqlParameter("@AgeIndex", SqlDbType.Int);
planIndexParameter.Value = (object)AgeItem.AgeIndex ?? DBNull.Value;
parameters[0] = planIn...
Drop all tables whose names begin with a certain string
...
In SQL Server 2005 I had to change the last two lines to close cmds; deallocate cmds.
– Hamish Grubijan
Apr 26 '11 at 14:08
...
What is the difference between a schema and a table and a database?
...ion of tables. A DBMS (Database Management System) is the software (like MySQL, SQL Server, Oracle, etc) that manages and runs a database.
share
|
improve this answer
|
follo...
XMLHttpRequest Origin null is not allowed Access-Control-Allow-Origin for file:/// to file:/// (Serv
...eeded in a separate javascript file instead. (In my case I needed a binary SQLite blob to use with https://github.com/kripken/sql.js/)
I created a file called base64_data.js (and used btoa() to convert the data that I needed and insert it into a <div> so I could copy it).
var base64_data = "...
Where are my postgres *.conf files?
I have recently reinstalled postgresql 8.3 on my Ubuntu 8.04 after update. Used EnterpriseDB package. I can connect to the database locally, I see system DB postgres but I can't configure it because I can't find config files. Searched through entire hard drive and found only samples like pg_hba.con...
What is the Java equivalent for LINQ? [closed]
...s trying to port LINQ to Java are implementations for a concrete scenario (SQL, Objects...) but does not covr the main goal of LINQ: Integrate the Language Query in the code. Due to this, there is no real alternative nor initative, for now, that can be considered as an alternative.
...
Find() vs. Where().FirstOrDefault()
...nd makes use of the primary keys (hence indexes), whereas Where is a plain sql query
– percebus
Feb 9 '16 at 19:56
4
...