大约有 47,000 项符合查询结果(耗时:0.0788秒) [XML]
SQLite - UPSERT *not* INSERT or REPLACE
...a (assuming the id is the primary key). So, why is it bad if exactly that happens?
– O. R. Mapper
Jan 4 '14 at 22:03
...
Nullable Foreign Key bad practice?
...c. etc. 2-valued logic is sufficient, but the data structures we get when applyiing it make "as simple as possible" still far less simple than "as simple as we'd want".
– Erwin Smout
May 24 '17 at 7:37
...
Fastest Way of Inserting in Entity Framework
... I've used SqlBulkCopy to insert large amounts of data right from my application. You basically have to create a DataTable, fill it up, then pass that to BulkCopy. There are a few gotchas as you're setting up your DataTable (most of which I've forgotten, sadly), but it should work just fine
...
What is ApplicationException for in .NET?
...
According to the remarks in msdn:
User applications, not the common language runtime, throw custom exceptions derived from the ApplicationException class. The ApplicationException class differentiates between exceptions defined by applications versus exceptions de...
How to handle click event in Button Column in Datagridview?
I am developing a windows application using C#. I am using DataGridView to display data. I have added a button column in that. I want to know how can I handle click event on that button in DataGridView.
...
Changing the status bar text color in splash screen iOS 7
...tContent instead.
And you don't have to set UIViewControllerBasedStatusBarAppearanceto NOin your plist, you can set the preferredStatusBarStyle you want to your view controllers.
share
|
improve th...
Can I redirect the stdout in python into some sort of string buffer?
...method.
This can be used to good effect to "catch" stdout output in a GUI application.
Here's a silly example in PyQt:
import sys
from PyQt4 import QtGui
class OutputWindow(QtGui.QPlainTextEdit):
def write(self, txt):
self.appendPlainText(str(txt))
app = QtGui.QApplication(sys.argv)...
How do PHP sessions work? (not “how are they used?”)
...
How does a mobile device (from a native app) handle sessions normally? Storing a session ID? Or is this were OAuth comes along?
– Adam Waite
Feb 24 '13 at 13:29
...
How can I put a database under git (version control)?
I'm doing a web app, and I need to make a branch for some major changes, the thing is, these changes require changes to the database schema, so I'd like to put the entire database under git as well.
...
How to Implement Custom Table View Section Headers and Footers with Storyboard
...create unexpected behaviour. Use a UIView instead.
– AppreciateIt
Jun 1 '16 at 8:19
4
Please don'...