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There is already an open DataReader associated with this Command which must be closed first
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answered May 19 '11 at 20:21
Ladislav MrnkaLadislav Mrnka
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How to rethrow the same exception in SQL Server
... @@trancount > 0 rollback transaction;
throw;
end catch
Before SQL 2012
begin try
begin transaction;
...
commit transaction;
end try
begin catch
declare @ErrorMessage nvarchar(max), @ErrorSeverity int, @ErrorState int;
select @ErrorMessage = ERROR_MESSAGE() + ' ...
C#位运算符（C#按位与、按位或 等） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...义更为明确，因而增强了可读性。例如：
typedef char NAME[20]; 表示NAME是字符数组类型，数组长度为20。
然后可用NAME 说明变量，如： NAME a1,a2,s1,s2;完全等效于： char a1[20],a2[20],s1[20],s2[20]
又如：
typedef struct stu{
char name[20];
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How to install PyQt4 on Windows using pip?
..."this platform"
– Naz
Apr 10 '17 at 20:37
8
FWIW, with python 3.6 installing pyqt5 via pip instal...
Disabled UIButton not faded or grey
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answered Apr 20 '11 at 3:24
RavinRavin
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How to namespace Twitter Bootstrap so styles don't conflict
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answered Dec 20 '12 at 17:14
AndrewAndrew
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Android app in Eclipse: Edit text not showing on Graphical layout
...ure you're not using a version that ends in "W" for Android Wear (e.g. API 20: Android 4.4W). I don't believe Wear supports EditText.
In both Android Studio and Eclipse, it's the dropdown with the green android in the layout preview's toolbar. You may want to set it explicitly and not allow the IDE...
Windows 7, 64 bit, DLL problems
...elopment box that also has all those Microsoft applications (Visual Studio 2008 + 2010, TFS, SDK, Microsoft Office)...
And it's still running just fine.
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Are PHP Variables passed by value or by reference?
...ael Stum
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4
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How do you Programmatically Download a Webpage in Java
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edited Aug 20 '13 at 21:08
Stas Yak
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answered Oct 26 '0...