大约有 47,000 项符合查询结果（耗时：0.0471秒） [XML]
Unable to cast object of type 'System.DBNull' to type 'System.String`
... even both. If the WHERE does not match any row, you'll get a null, if the selected row has NULL in that column, the return value is System.DBNull.
– Alexander
May 27 '14 at 7:52
...
What is the proper way to re-attach detached objects in Hibernate?
...k);
});
And Hibernate is going to execute the following SQL statements:
SELECT
b.id,
b.author AS author2_0_,
b.isbn AS isbn3_0_,
b.title AS title4_0_
FROM
book b
WHERE
b.id = 1
-- Merging the Book entity
UPDATE
book
SET
author = 'Vlad Mihalcea',
isbn = '978-9...
Bash: Strip trailing linebreak from output
...ine character you want to remove, you can use 'head' from GNU coreutils to select everything except the last byte. This should be quite quick:
head -c -1 log.txt
Also, for completeness, you can quickly check where your newline (or other special) characters are in your file using 'cat' and the 'sh...
Error message 'Unable to load one or more of the requested types. Retrieve the LoaderExceptions prop
...an also happen if your referenced DLL is "blocked". Right click on it, and select "unblock"
– Ben
Jun 10 '10 at 10:05
4
...
Addressing localhost from a VirtualBox virtual machine [closed]
...-> Network -> Host-only Networks -> click the "+" icon. Click OK.
Select your box and click the "Settings" icon -> Network -> Adapter 2 -> On the "Attached to:" dropdown, select "Host-only Adapter" and your network (vboxnet0) should show up below by default. Click OK.
Once you star...
Using HTML5/Canvas/JavaScript to take in-browser screenshots
Google's "Report a Bug" or "Feedback Tool" lets you select an area of your browser window to create a screenshot that is submitted with your feedback about a bug.
...
Web Application Problems (web.config errors) HTTP 500.19 with IIS7.5 and ASP.NET v2
...ou can use the Microsoft Web Platform Installer to install it. Execute it, select Products, in the left menu select Server and find URL Rewrite in the list and install it.
Or you can download it here.
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How to turn off the Eclipse code formatter for certain sections of Java code?
... does what you want.
Else there is this ugly hack
String query = //
"SELECT FOO, BAR, BAZ" + //
" FROM ABC" + //
" WHERE BAR > 4";
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Visual Studio 2010 - recommended extensions [closed]
...e Outliner - not available on this link.
Triple Click - Makes triple click select an entire line.
ItalicComments
Go To Definition - Make ctrl+click perform a "Go To Definition" on the identifier under the cursor
Spell Checker - not available on this link.
Remove and Sort Using - Adds a context men...
What is the Windows equivalent of the diff command?
...nd line.
You can set the PATH variable by right clicking on Computer and selecting Properties. Then you can click on Advanced System Settings on the left side of the screen. In the pop up, click Environment Variables and then either add or update the PATH variable in your user variables with Git\b...