大约有 15,600 项符合查询结果（耗时：0.0250秒） [XML]
Get free disk space
... RichardOD.
// Pinvoke for API function
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool GetDiskFreeSpaceEx(string lpDirectoryName,
out ulong lpFreeBytesAvailable,
out ulong lpTotalNumberOfBytes,
out ulong lpT...
Run a PostgreSQL .sql file using command line arguments
...
Of course, you will get a fatal error for authenticating, because you do not include a user name...
Try this one, it is OK for me :)
psql -U username -d myDataBase -a -f myInsertFile
If the database is remote, use the same command with host
psql -h hos...
How to reset postgres' primary key sequence when it falls out of sync?
...can occur due to unplanned database shutdowns, transaction rollbacks after errors, etc.
– Craig Ringer
Sep 20 '17 at 2:04
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show 12 more com...
Razor HtmlHelper Extensions (or other namespaces for views) Not Found
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I had this same error in an MVC 4 application using Razor. In an attempt to clean up the web.config files, I removed the two webpages: configuration values:
<appSettings>
<add key="webpages:Version" value="2.0.0.0" />
<ad...
Cross field validation with Hibernate Validator (JSR 303)
...validations of the same type is via a list of annotations. This allows the error message to be specified per match.
For example, validating a common form:
@FieldMatch.List({
@FieldMatch(first = "password", second = "confirmPassword", message = "The password fields must match"),
@...
How do I change the number of open files limit in Linux? [closed]
When running my application I sometimes get an error about too many files open .
4 Answers
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MySQL Cannot drop index needed in a foreign key constraint
...at new column. I'm trying to remove the current index but keep getting the error MySQL Cannot drop index needed in a foreign key constraint
...
How to get the first five character of a String
...g for length before hand.
The other way is to use String.Substring with error checking
like:
string firstFivCharWithSubString =
!String.IsNullOrWhiteSpace(yourStringVariable) && yourStringVariable.Length >= 5
? yourStringVariable.Substring(0, 5)
: yourStringVariable;
...
How to convert an entire MySQL database characterset and collation to UTF-8?
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Can you put more detail in this I get ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DB="dbname"
– steros
Apr 9 '14 ...
Why does auto a=1; compile in C?
...CC and Clang both warn about it in C99 mode, but they don't consider it an error except with -Werror.
– Fred Foo
May 1 '14 at 12:12
2
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