大约有 46,000 项符合查询结果（耗时：0.0508秒） [XML]
“There was an error while performing this operation”
I have a website in IIS for which I cannot open any of the settings like Authentication, Handler Mappings, Authorization Rules etc. It just shows the error message "There was an error while performing this operation", with no more details and points to web.config.
...
Resumable downloads when using PHP to send the file?
...es, to tell the client that you support partial content. Then, if request with a Range: bytes=x-y header is received (with x and y being numbers) you parse the range the client is requesting, open the file as usual, seek x bytes ahead and send the next y - x bytes. Also set the response to HTTP/1.0...
Can I set an opacity only to the background image of a div?
...
Nope, this cannot be done since opacity affects the whole element including its content and there's no way to alter this behavior. You can work around this with the two following methods.
Secondary div
Add another div element to the container to hold the back...
How to play a sound in C#, .NET
I have a Windows application written in C#/.NET.
7 Answers
7
...
Twitter bootstrap scrollable table
I would like to have a table on my website. The problem is that this table will have about 400 lines. How can I limit the table's height, and apply scrollbar to it?
This is my code:
...
Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...
http://wiki.postgresql.org/wiki/Transactional_DDL_in_PostgreSQL:_A_Competitive_Analysis provides an overview of this issue from PostgreSQL's perspective.
Is DDL transactional according to this document?
PostgreSQL - yes
MySQL - no; DDL causes an implicit commit
Oracle Database 11g Release 2 and...
Why is __dirname not defined in node REPL?
From the node manual I see that I can get the directory of a file with __dirname , but from the REPL this seems to be undefined. Is this a misunderstanding on my side or where is the error?
...
Displaying the #include hierarchy for a C++ file in Visual Studio
...arge Visual C++ project that I'm trying to migrate to Visual Studio 2010. It's a huge mix of stuff from various sources and of various ages. I'm getting problems because something is including both winsock.h and winsock2.h .
...
How do you cast a List of supertypes to a List of subtypes?
...
Simply casting to List<TestB> almost works; but it doesn't work because you can't cast a generic type of one parameter to another. However, you can cast through an intermediate wildcard type and it will be allowed (since you can cast to and from wildcard types, just with a...
Nullable type as a generic parameter possible?
...
Change the return type to Nullable<T>, and call the method with the non nullable parameter
static void Main(string[] args)
{
int? i = GetValueOrNull<int>(null, string.Empty);
}
public static Nullable<T> GetValueOrNull<T>(DbDataRecord reader, string columnName) ...