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SQLite - UPSERT *not* INSERT or REPLACE
...ould
Begin a transaction
Try an insert
Check for primary key violation error
if we got an error do the update
Commit
This way you avoid the select and you are transactionally sound on Sqlite.
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CASCADE DELETE just once
...s(1);
INSERT 0 1
-- restricting works
testing=# delete from a where id=1;
ERROR: update or delete on table "a" violates foreign key constraint "b_id_fkey" on table "b"
DETAIL: Key (id)=(1) is still referenced from table "b".
-- find the name of the constraint
testing=# \d b;
Table "public...
How stable is the git plugin for eclipse?
...t with completely different GUI, unheard commands, two or even single word error messages and "features" like overwriting the shared repository without warning? Do not use it, use command line interface. If you do not like command line interface, do not use GIT at all.
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Group By Multiple Columns
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in case of mvc with nHibernate getting error for dll issues. Problem resolved by GroupBy(x=> new { x.Column1, x.Column2 }, (key, group) => new { Key1 = key.Column1, Key2 = key.Column2 , Result = ...
ASP.NET MVC partial views: input name prefixes
...ry constructor that takes the current ViewData, or you'll lose model state errors, validation data, etc.
– bhamlin
Apr 6 '12 at 8:10
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Change File Extension Using C#
...format on physical path is a.Jpeg, so when i try to delete it, it gives me error cannot find the file on specified path. so i am thinking it has some to do with the file extension is not matching. so i am trying to convert jpg to Jpeg and delete the file then.
– safi
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Session timeout in ASP.NET
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I got error at here <authentication mode="Forms"> after i place it in web.config
– Lst Patrick
Aug 10 '15 at 9:45
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Connect to a heroku database with pgadmin
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I am getting error on pgadmin 3 that the server you are trying to connect is not between 8.4 and 9.3 and it connects but shows a list of 159 databases with error popups all the time.
– Abhishek
Oct 2...
What characters are allowed in an email address?
I'm not asking about full email validation.
17 Answers
17
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How do I turn a C# object into a JSON string in .NET?
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It doesn't serialize plain classes. The error reported "Consider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute. If the type is a collection, consider marking it with t...