Generate id for files based on file content
I am using a upload mechanism for users to upload files and the user is suppose to receive 3 different file extracted from the uploaded one in an group which is identified by the uploaded file name.
I am trying to map the output files to it's parent file.
How can generate something unique that can be linked to the files so that they are easily associated to its group.
I am using C# and SQl Server Filestream to store the files in database.
The limitation that i am facing is that I cannot rename the file provided by user.
Can someone help me out here?
c#
sql-server file asked Nov 24 '18 at 10:28
Pramveer RothanPramveer Rothan
2210
|
show 3 more comments
I am using a upload mechanism for users to upload files and the user is suppose to receive 3 different file extracted from the uploaded one in an group which is identified by the uploaded file name.
I am trying to map the output files to it's parent file.
How can generate something unique that can be linked to the files so that they are easily associated to its group.
I am using C# and SQl Server Filestream to store the files in database.
The limitation that i am facing is that I cannot rename the file provided by user.
Can someone help me out here?
c#
sql-server file asked Nov 24 '18 at 10:28
Pramveer RothanPramveer Rothan
2210
your formulation isn't exactly clear, but if you're just looking for a way to identify unique files, use a hash
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:36
using hash will collide if a user uploads same file more than one time in different folders.
– Pramveer Rothan
Nov 24 '18 at 10:39
as I said, your question is pretty hard to understand (example: what is aparent file)
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:40
I agree. afaik the database will always have aidproperty which is the primary key by default. Why not use those /w hash.
– Hugo Woesthuis
Nov 24 '18 at 10:44
1
also if your main concern is that the hash may collide, maybe take the hash of the file's path appended to the content
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:45
|
show 3 more comments
I am using a upload mechanism for users to upload files and the user is suppose to receive 3 different file extracted from the uploaded one in an group which is identified by the uploaded file name.
I am trying to map the output files to it's parent file.
How can generate something unique that can be linked to the files so that they are easily associated to its group.
I am using C# and SQl Server Filestream to store the files in database.
The limitation that i am facing is that I cannot rename the file provided by user.
Can someone help me out here?
c#
sql-server file asked Nov 24 '18 at 10:28
Pramveer RothanPramveer Rothan
2210
I am using a upload mechanism for users to upload files and the user is suppose to receive 3 different file extracted from the uploaded one in an group which is identified by the uploaded file name.
I am trying to map the output files to it's parent file.
How can generate something unique that can be linked to the files so that they are easily associated to its group.
I am using C# and SQl Server Filestream to store the files in database.
The limitation that i am facing is that I cannot rename the file provided by user.
Can someone help me out here?
c#
sql-server file c#
sql-server file asked Nov 24 '18 at 10:28
Pramveer RothanPramveer Rothan
2210
asked Nov 24 '18 at 10:28
Pramveer RothanPramveer Rothan
2210
asked Nov 24 '18 at 10:28
Pramveer RothanPramveer Rothan
2210
asked Nov 24 '18 at 10:28
Pramveer RothanPramveer Rothan
2210
asked Nov 24 '18 at 10:28
Pramveer RothanPramveer Rothan
2210
2210
your formulation isn't exactly clear, but if you're just looking for a way to identify unique files, use a hash
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:36
using hash will collide if a user uploads same file more than one time in different folders.
– Pramveer Rothan
Nov 24 '18 at 10:39
as I said, your question is pretty hard to understand (example: what is aparent file)
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:40
I agree. afaik the database will always have aidproperty which is the primary key by default. Why not use those /w hash.
– Hugo Woesthuis
Nov 24 '18 at 10:44
1
also if your main concern is that the hash may collide, maybe take the hash of the file's path appended to the content
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:45
|
show 3 more comments
your formulation isn't exactly clear, but if you're just looking for a way to identify unique files, use a hash
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:36
using hash will collide if a user uploads same file more than one time in different folders.
– Pramveer Rothan
Nov 24 '18 at 10:39
as I said, your question is pretty hard to understand (example: what is aparent file)
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:40
I agree. afaik the database will always have aidproperty which is the primary key by default. Why not use those /w hash.
– Hugo Woesthuis
Nov 24 '18 at 10:44
1
also if your main concern is that the hash may collide, maybe take the hash of the file's path appended to the content
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:45
your formulation isn't exactly clear, but if you're just looking for a way to identify unique files, use a hash
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:36
your formulation isn't exactly clear, but if you're just looking for a way to identify unique files, use a hash
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:36
using hash will collide if a user uploads same file more than one time in different folders.
– Pramveer Rothan
Nov 24 '18 at 10:39
using hash will collide if a user uploads same file more than one time in different folders.
– Pramveer Rothan
Nov 24 '18 at 10:39
as I said, your question is pretty hard to understand (example: what is a
parent file)– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:40
as I said, your question is pretty hard to understand (example: what is a
parent file)– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:40
I agree. afaik the database will always have a
id property which is the primary key by default. Why not use those /w hash.– Hugo Woesthuis
Nov 24 '18 at 10:44
I agree. afaik the database will always have a
id property which is the primary key by default. Why not use those /w hash.– Hugo Woesthuis
Nov 24 '18 at 10:44
1
1
also if your main concern is that the hash may collide, maybe take the hash of the file's path appended to the content
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:45
also if your main concern is that the hash may collide, maybe take the hash of the file's path appended to the content
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:45
|
show 3 more comments
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your formulation isn't exactly clear, but if you're just looking for a way to identify unique files, use a hash
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:36
using hash will collide if a user uploads same file more than one time in different folders.
– Pramveer Rothan
Nov 24 '18 at 10:39
as I said, your question is pretty hard to understand (example: what is a
parent file)– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:40
I agree. afaik the database will always have a
idproperty which is the primary key by default. Why not use those /w hash.– Hugo Woesthuis
Nov 24 '18 at 10:44
1
also if your main concern is that the hash may collide, maybe take the hash of the file's path appended to the content
– Tilman B. aka Nerdyyy
Nov 24 '18 at 10:45