Mixing
Multiple user access to sql database
I have one master database at server. This contains a table TVehicle information like Make, model, series, grade, production year.
I have multiple users say U1,U2,U3 all have same winforms application (C#) accessing this database from server. I want a logic such that when U1 modify a vehicle say v1, other users u2 & u3 application must show that this vehicle is locked. Please can you help me out in this?
Thanks in advance.
c#
asked Nov 22 '18 at 13:22
ShivakumarShivakumar
52
|
show 3 more comments
I have one master database at server. This contains a table TVehicle information like Make, model, series, grade, production year.
I have multiple users say U1,U2,U3 all have same winforms application (C#) accessing this database from server. I want a logic such that when U1 modify a vehicle say v1, other users u2 & u3 application must show that this vehicle is locked. Please can you help me out in this?
Thanks in advance.
c#
asked Nov 22 '18 at 13:22
ShivakumarShivakumar
52
Are you using an ORM?
– CodeNotFound
Nov 22 '18 at 13:23
1
the simplest way i can think about is to add a column to each row, let's call it ModifiedBy(int) and, and her default value is zero, if U1 changes V1 it ModifiedBy changes to 1, if U2 changes V1 , ModifiedBy changes to 2, and then you check if ModifiedBy is diffrent than zero
– styx
Nov 22 '18 at 13:26
@styx and hope that none forgets to reset that ModifiedBy back to zero when finished. Of course in an ideal world we never forget anything and we never have crashes that stops our processing.
– Steve
Nov 22 '18 at 13:48
@Steve I said simplest, not the best way
– styx
Nov 22 '18 at 13:53
1
OK, but simplest doesn't mean broken.
– Steve
Nov 22 '18 at 13:56
|
show 3 more comments
I have one master database at server. This contains a table TVehicle information like Make, model, series, grade, production year.
I have multiple users say U1,U2,U3 all have same winforms application (C#) accessing this database from server. I want a logic such that when U1 modify a vehicle say v1, other users u2 & u3 application must show that this vehicle is locked. Please can you help me out in this?
Thanks in advance.
c#
asked Nov 22 '18 at 13:22
ShivakumarShivakumar
52
I have one master database at server. This contains a table TVehicle information like Make, model, series, grade, production year.
I have multiple users say U1,U2,U3 all have same winforms application (C#) accessing this database from server. I want a logic such that when U1 modify a vehicle say v1, other users u2 & u3 application must show that this vehicle is locked. Please can you help me out in this?
Thanks in advance.
c#
c#
asked Nov 22 '18 at 13:22
ShivakumarShivakumar
52
asked Nov 22 '18 at 13:22
ShivakumarShivakumar
52
asked Nov 22 '18 at 13:22
ShivakumarShivakumar
52
asked Nov 22 '18 at 13:22
ShivakumarShivakumar
52
asked Nov 22 '18 at 13:22
ShivakumarShivakumar
52
52
Are you using an ORM?
– CodeNotFound
Nov 22 '18 at 13:23
1
the simplest way i can think about is to add a column to each row, let's call it ModifiedBy(int) and, and her default value is zero, if U1 changes V1 it ModifiedBy changes to 1, if U2 changes V1 , ModifiedBy changes to 2, and then you check if ModifiedBy is diffrent than zero
– styx
Nov 22 '18 at 13:26
@styx and hope that none forgets to reset that ModifiedBy back to zero when finished. Of course in an ideal world we never forget anything and we never have crashes that stops our processing.
– Steve
Nov 22 '18 at 13:48
@Steve I said simplest, not the best way
– styx
Nov 22 '18 at 13:53
1
OK, but simplest doesn't mean broken.
– Steve
Nov 22 '18 at 13:56
|
show 3 more comments
Are you using an ORM?
– CodeNotFound
Nov 22 '18 at 13:23
1
the simplest way i can think about is to add a column to each row, let's call it ModifiedBy(int) and, and her default value is zero, if U1 changes V1 it ModifiedBy changes to 1, if U2 changes V1 , ModifiedBy changes to 2, and then you check if ModifiedBy is diffrent than zero
– styx
Nov 22 '18 at 13:26
@styx and hope that none forgets to reset that ModifiedBy back to zero when finished. Of course in an ideal world we never forget anything and we never have crashes that stops our processing.
– Steve
Nov 22 '18 at 13:48
@Steve I said simplest, not the best way
– styx
Nov 22 '18 at 13:53
1
OK, but simplest doesn't mean broken.
– Steve
Nov 22 '18 at 13:56
Are you using an ORM?
– CodeNotFound
Nov 22 '18 at 13:23
Are you using an ORM?
– CodeNotFound
Nov 22 '18 at 13:23
1
1
the simplest way i can think about is to add a column to each row, let's call it ModifiedBy(int) and, and her default value is zero, if U1 changes V1 it ModifiedBy changes to 1, if U2 changes V1 , ModifiedBy changes to 2, and then you check if ModifiedBy is diffrent than zero
– styx
Nov 22 '18 at 13:26
the simplest way i can think about is to add a column to each row, let's call it ModifiedBy(int) and, and her default value is zero, if U1 changes V1 it ModifiedBy changes to 1, if U2 changes V1 , ModifiedBy changes to 2, and then you check if ModifiedBy is diffrent than zero
– styx
Nov 22 '18 at 13:26
@styx and hope that none forgets to reset that ModifiedBy back to zero when finished. Of course in an ideal world we never forget anything and we never have crashes that stops our processing.
– Steve
Nov 22 '18 at 13:48
@styx and hope that none forgets to reset that ModifiedBy back to zero when finished. Of course in an ideal world we never forget anything and we never have crashes that stops our processing.
– Steve
Nov 22 '18 at 13:48
@Steve I said simplest, not the best way
– styx
Nov 22 '18 at 13:53
@Steve I said simplest, not the best way
– styx
Nov 22 '18 at 13:53
1
1
OK, but simplest doesn't mean broken.
– Steve
Nov 22 '18 at 13:56
OK, but simplest doesn't mean broken.
– Steve
Nov 22 '18 at 13:56
|
show 3 more comments
1 Answer
1
active
oldest
votes
You can add 3 columns :
ModifiedBy (username )
ModifiedOn ( DateTime)
isVehicleLock(Boolean)
to the TVehicle table and check the value of isVehicleLock column everytime you want to display a record, so if "isVehicleLock" is equal to True and ModifiedBy is different from the current user you can display the vehicle as locked .
answered Nov 22 '18 at 14:24
Jigna JainJigna Jain
1129
Then, everytime once in certain duration I always keep checking the ModifiedBy bool value to other users? Don't you think it hits performance because everytime we fire query to server for this status?
– Shivakumar
Nov 23 '18 at 4:44
add a comment |
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1 Answer
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active
oldest
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1 Answer
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active
oldest
votes
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oldest
votes
active
oldest
votes
You can add 3 columns :
ModifiedBy (username )
ModifiedOn ( DateTime)
isVehicleLock(Boolean)
to the TVehicle table and check the value of isVehicleLock column everytime you want to display a record, so if "isVehicleLock" is equal to True and ModifiedBy is different from the current user you can display the vehicle as locked .
answered Nov 22 '18 at 14:24
Jigna JainJigna Jain
1129
Then, everytime once in certain duration I always keep checking the ModifiedBy bool value to other users? Don't you think it hits performance because everytime we fire query to server for this status?
– Shivakumar
Nov 23 '18 at 4:44
add a comment |
You can add 3 columns :
ModifiedBy (username )
ModifiedOn ( DateTime)
isVehicleLock(Boolean)
to the TVehicle table and check the value of isVehicleLock column everytime you want to display a record, so if "isVehicleLock" is equal to True and ModifiedBy is different from the current user you can display the vehicle as locked .
answered Nov 22 '18 at 14:24
Jigna JainJigna Jain
1129
Then, everytime once in certain duration I always keep checking the ModifiedBy bool value to other users? Don't you think it hits performance because everytime we fire query to server for this status?
– Shivakumar
Nov 23 '18 at 4:44
add a comment |
You can add 3 columns :
ModifiedBy (username )
ModifiedOn ( DateTime)
isVehicleLock(Boolean)
to the TVehicle table and check the value of isVehicleLock column everytime you want to display a record, so if "isVehicleLock" is equal to True and ModifiedBy is different from the current user you can display the vehicle as locked .
answered Nov 22 '18 at 14:24
Jigna JainJigna Jain
1129
You can add 3 columns :
ModifiedBy (username )
ModifiedOn ( DateTime)
isVehicleLock(Boolean)
to the TVehicle table and check the value of isVehicleLock column everytime you want to display a record, so if "isVehicleLock" is equal to True and ModifiedBy is different from the current user you can display the vehicle as locked .
answered Nov 22 '18 at 14:24
Jigna JainJigna Jain
1129
edited Nov 22 '18 at 14:35
answered Nov 22 '18 at 14:24
Jigna JainJigna Jain
1129
answered Nov 22 '18 at 14:24
Jigna JainJigna Jain
1129
answered Nov 22 '18 at 14:24
Jigna JainJigna Jain
1129
1129
Then, everytime once in certain duration I always keep checking the ModifiedBy bool value to other users? Don't you think it hits performance because everytime we fire query to server for this status?
– Shivakumar
Nov 23 '18 at 4:44
add a comment |
Then, everytime once in certain duration I always keep checking the ModifiedBy bool value to other users? Don't you think it hits performance because everytime we fire query to server for this status?
– Shivakumar
Nov 23 '18 at 4:44
Then, everytime once in certain duration I always keep checking the ModifiedBy bool value to other users? Don't you think it hits performance because everytime we fire query to server for this status?
– Shivakumar
Nov 23 '18 at 4:44
Then, everytime once in certain duration I always keep checking the ModifiedBy bool value to other users? Don't you think it hits performance because everytime we fire query to server for this status?
– Shivakumar
Nov 23 '18 at 4:44
add a comment |
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Are you using an ORM?
– CodeNotFound
Nov 22 '18 at 13:23
1
the simplest way i can think about is to add a column to each row, let's call it ModifiedBy(int) and, and her default value is zero, if U1 changes V1 it ModifiedBy changes to 1, if U2 changes V1 , ModifiedBy changes to 2, and then you check if ModifiedBy is diffrent than zero
– styx
Nov 22 '18 at 13:26
@styx and hope that none forgets to reset that ModifiedBy back to zero when finished. Of course in an ideal world we never forget anything and we never have crashes that stops our processing.
– Steve
Nov 22 '18 at 13:48
@Steve I said simplest, not the best way
– styx
Nov 22 '18 at 13:53
1
OK, but simplest doesn't mean broken.
– Steve
Nov 22 '18 at 13:56