Why does my code-first ASP.NET MVC app suddenly not work just because I opened it from another location?
I have a code-first ASP.NET MVC app that ran smoothly and was able to access the data from SQL Server until I copied the project over to another location and opened it from there.
I get the following errors:
System.Data.DataException
HResult=0x80131501
Message=An exception occurred while initializing the database. See the InnerException for details.
Source=
StackTrace:
Inner Exception 1:
EntityException: The underlying provider failed on Open.
Inner Exception 2:
SqlException: Database 'C:UsersBICHEDesktopFinalCSharpChallengeFinalCSharpChallengeApp_DataStudentContextDB.mdf' already exists. Choose a different database name.
Cannot attach the file 'C:UsersBICHEDesktopMY REPOS3The-Tech-Academy-C-Coding-ProjectFinalCSharpChallengeFinalCSharpChallengeApp_DataStudentContextDB.mdf' as database 'StudentContextDB'.
My questions are: why does this happen just because I moved the project from my desktop to another location on my computer?
Can this be solved by making an "if" statement that proceeds to use the StudentContextDB if it exists, and creates it if it doesn't? (My instructor suggested this, so I'm thinking I will try this first)
Lastly, if this is the right solution, what would be the syntax for that particular statement? I've seen instructions for Drop and Create, but not Use or Create.
I appreciate any insight people may have on this issue!
sql-server asp.net-mvc code-first edited Jan 1 at 9:34
marc_s
577k12911141259
asked Dec 31 '18 at 21:09
FreddieMercuryFreddieMercury
668
add a comment |
I have a code-first ASP.NET MVC app that ran smoothly and was able to access the data from SQL Server until I copied the project over to another location and opened it from there.
I get the following errors:
System.Data.DataException
HResult=0x80131501
Message=An exception occurred while initializing the database. See the InnerException for details.
Source=
StackTrace:
Inner Exception 1:
EntityException: The underlying provider failed on Open.
Inner Exception 2:
SqlException: Database 'C:UsersBICHEDesktopFinalCSharpChallengeFinalCSharpChallengeApp_DataStudentContextDB.mdf' already exists. Choose a different database name.
Cannot attach the file 'C:UsersBICHEDesktopMY REPOS3The-Tech-Academy-C-Coding-ProjectFinalCSharpChallengeFinalCSharpChallengeApp_DataStudentContextDB.mdf' as database 'StudentContextDB'.
My questions are: why does this happen just because I moved the project from my desktop to another location on my computer?
Can this be solved by making an "if" statement that proceeds to use the StudentContextDB if it exists, and creates it if it doesn't? (My instructor suggested this, so I'm thinking I will try this first)
Lastly, if this is the right solution, what would be the syntax for that particular statement? I've seen instructions for Drop and Create, but not Use or Create.
I appreciate any insight people may have on this issue!
sql-server asp.net-mvc code-first edited Jan 1 at 9:34
marc_s
577k12911141259
asked Dec 31 '18 at 21:09
FreddieMercuryFreddieMercury
668
Thank you for your answer, GMB! By changing the code in this way, to have a relative database location, would it also ensure that other people could run the app if I sent it to them?
– FreddieMercury
Dec 31 '18 at 21:23
@FreddyMercury : since this seems relevant for your use case, I am deleting my comments and posting this as an answer, please accept it if you considers that it properly responds to your question.
– GMB
Dec 31 '18 at 21:36
add a comment |
I have a code-first ASP.NET MVC app that ran smoothly and was able to access the data from SQL Server until I copied the project over to another location and opened it from there.
I get the following errors:
System.Data.DataException
HResult=0x80131501
Message=An exception occurred while initializing the database. See the InnerException for details.
Source=
StackTrace:
Inner Exception 1:
EntityException: The underlying provider failed on Open.
Inner Exception 2:
SqlException: Database 'C:UsersBICHEDesktopFinalCSharpChallengeFinalCSharpChallengeApp_DataStudentContextDB.mdf' already exists. Choose a different database name.
Cannot attach the file 'C:UsersBICHEDesktopMY REPOS3The-Tech-Academy-C-Coding-ProjectFinalCSharpChallengeFinalCSharpChallengeApp_DataStudentContextDB.mdf' as database 'StudentContextDB'.
My questions are: why does this happen just because I moved the project from my desktop to another location on my computer?
Can this be solved by making an "if" statement that proceeds to use the StudentContextDB if it exists, and creates it if it doesn't? (My instructor suggested this, so I'm thinking I will try this first)
Lastly, if this is the right solution, what would be the syntax for that particular statement? I've seen instructions for Drop and Create, but not Use or Create.
I appreciate any insight people may have on this issue!
sql-server asp.net-mvc code-first edited Jan 1 at 9:34
marc_s
577k12911141259
asked Dec 31 '18 at 21:09
FreddieMercuryFreddieMercury
668
I have a code-first ASP.NET MVC app that ran smoothly and was able to access the data from SQL Server until I copied the project over to another location and opened it from there.
I get the following errors:
System.Data.DataException
HResult=0x80131501
Message=An exception occurred while initializing the database. See the InnerException for details.
Source=
StackTrace:
Inner Exception 1:
EntityException: The underlying provider failed on Open.
Inner Exception 2:
SqlException: Database 'C:UsersBICHEDesktopFinalCSharpChallengeFinalCSharpChallengeApp_DataStudentContextDB.mdf' already exists. Choose a different database name.
Cannot attach the file 'C:UsersBICHEDesktopMY REPOS3The-Tech-Academy-C-Coding-ProjectFinalCSharpChallengeFinalCSharpChallengeApp_DataStudentContextDB.mdf' as database 'StudentContextDB'.
My questions are: why does this happen just because I moved the project from my desktop to another location on my computer?
Can this be solved by making an "if" statement that proceeds to use the StudentContextDB if it exists, and creates it if it doesn't? (My instructor suggested this, so I'm thinking I will try this first)
Lastly, if this is the right solution, what would be the syntax for that particular statement? I've seen instructions for Drop and Create, but not Use or Create.
I appreciate any insight people may have on this issue!
sql-server asp.net-mvc code-first sql-server asp.net-mvc code-first edited Jan 1 at 9:34
marc_s
577k12911141259
asked Dec 31 '18 at 21:09
FreddieMercuryFreddieMercury
668
edited Jan 1 at 9:34
marc_s
577k12911141259
asked Dec 31 '18 at 21:09
FreddieMercuryFreddieMercury
668
edited Jan 1 at 9:34
marc_s
577k12911141259
edited Jan 1 at 9:34
marc_s
577k12911141259
edited Jan 1 at 9:34
marc_s
577k12911141259
577k12911141259
asked Dec 31 '18 at 21:09
FreddieMercuryFreddieMercury
668
asked Dec 31 '18 at 21:09
FreddieMercuryFreddieMercury
668
asked Dec 31 '18 at 21:09
FreddieMercuryFreddieMercury
668
668
Thank you for your answer, GMB! By changing the code in this way, to have a relative database location, would it also ensure that other people could run the app if I sent it to them?
– FreddieMercury
Dec 31 '18 at 21:23
@FreddyMercury : since this seems relevant for your use case, I am deleting my comments and posting this as an answer, please accept it if you considers that it properly responds to your question.
– GMB
Dec 31 '18 at 21:36
add a comment |
Thank you for your answer, GMB! By changing the code in this way, to have a relative database location, would it also ensure that other people could run the app if I sent it to them?
– FreddieMercury
Dec 31 '18 at 21:23
@FreddyMercury : since this seems relevant for your use case, I am deleting my comments and posting this as an answer, please accept it if you considers that it properly responds to your question.
– GMB
Dec 31 '18 at 21:36
Thank you for your answer, GMB! By changing the code in this way, to have a relative database location, would it also ensure that other people could run the app if I sent it to them?
– FreddieMercury
Dec 31 '18 at 21:23
Thank you for your answer, GMB! By changing the code in this way, to have a relative database location, would it also ensure that other people could run the app if I sent it to them?
– FreddieMercury
Dec 31 '18 at 21:23
@FreddyMercury : since this seems relevant for your use case, I am deleting my comments and posting this as an answer, please accept it if you considers that it properly responds to your question.
– GMB
Dec 31 '18 at 21:36
@FreddyMercury : since this seems relevant for your use case, I am deleting my comments and posting this as an answer, please accept it if you considers that it properly responds to your question.
– GMB
Dec 31 '18 at 21:36
add a comment |
2 Answers
2
active
oldest
votes
SqlException: Database '...' already exists. Choose a different database name.
It looks like your code is trying to recreate the database... If this is a new deployment, you probably want a new database ; you should modify your code to have a database location which is relative to your application home directory.
The other advantage is that, if you give your application to other people, they will have their database created on their computer under the relative path defined by you, so that will play softly as well.
answered Dec 31 '18 at 21:34
GMBGMB
13.1k2824
Thanks for your solution, GMB! This is what I need.
– FreddieMercury
Dec 31 '18 at 22:05
Hi again, GMB--not sure if you'll see this, but I've been looking up how to modify my code to have a database location that is relative to my app's home directory, and am not seeing a guide that is relevant to this exact context. It may be much simpler than I'm making it, but is there a chance you can tell me how to go about this change? Even broad explanation will guide me in the right direction. I apologize if this is really obvious! I'm a bit new to MVC and SQL. Thank you again for your solution!
– FreddieMercury
Dec 31 '18 at 22:21
add a comment |
Short version here is that the db server still has a reference to the old location of the database. You moved it and tried to fire up the app and point to a new location of the database with the same name. The db server doesn't know how to handle that. It would be better to detach the database from the db server then move the files.
answered Dec 31 '18 at 21:15
John BabbJohn Babb
8771018
Thank you for your response, John! I'm looking up how to detach the database right now. I'm concerned though, because I need to send this app to my instructor and he would also have a problem opening it if those files cannot be moved. Is there a way to ensure he could run it on his own machine without problems?
– FreddieMercury
Dec 31 '18 at 21:21
add a comment |
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2 Answers
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2 Answers
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SqlException: Database '...' already exists. Choose a different database name.
It looks like your code is trying to recreate the database... If this is a new deployment, you probably want a new database ; you should modify your code to have a database location which is relative to your application home directory.
The other advantage is that, if you give your application to other people, they will have their database created on their computer under the relative path defined by you, so that will play softly as well.
answered Dec 31 '18 at 21:34
GMBGMB
13.1k2824
Thanks for your solution, GMB! This is what I need.
– FreddieMercury
Dec 31 '18 at 22:05
Hi again, GMB--not sure if you'll see this, but I've been looking up how to modify my code to have a database location that is relative to my app's home directory, and am not seeing a guide that is relevant to this exact context. It may be much simpler than I'm making it, but is there a chance you can tell me how to go about this change? Even broad explanation will guide me in the right direction. I apologize if this is really obvious! I'm a bit new to MVC and SQL. Thank you again for your solution!
– FreddieMercury
Dec 31 '18 at 22:21
add a comment |
SqlException: Database '...' already exists. Choose a different database name.
It looks like your code is trying to recreate the database... If this is a new deployment, you probably want a new database ; you should modify your code to have a database location which is relative to your application home directory.
The other advantage is that, if you give your application to other people, they will have their database created on their computer under the relative path defined by you, so that will play softly as well.
answered Dec 31 '18 at 21:34
GMBGMB
13.1k2824
Thanks for your solution, GMB! This is what I need.
– FreddieMercury
Dec 31 '18 at 22:05
Hi again, GMB--not sure if you'll see this, but I've been looking up how to modify my code to have a database location that is relative to my app's home directory, and am not seeing a guide that is relevant to this exact context. It may be much simpler than I'm making it, but is there a chance you can tell me how to go about this change? Even broad explanation will guide me in the right direction. I apologize if this is really obvious! I'm a bit new to MVC and SQL. Thank you again for your solution!
– FreddieMercury
Dec 31 '18 at 22:21
add a comment |
SqlException: Database '...' already exists. Choose a different database name.
It looks like your code is trying to recreate the database... If this is a new deployment, you probably want a new database ; you should modify your code to have a database location which is relative to your application home directory.
The other advantage is that, if you give your application to other people, they will have their database created on their computer under the relative path defined by you, so that will play softly as well.
answered Dec 31 '18 at 21:34
GMBGMB
13.1k2824
SqlException: Database '...' already exists. Choose a different database name.
It looks like your code is trying to recreate the database... If this is a new deployment, you probably want a new database ; you should modify your code to have a database location which is relative to your application home directory.
The other advantage is that, if you give your application to other people, they will have their database created on their computer under the relative path defined by you, so that will play softly as well.
answered Dec 31 '18 at 21:34
GMBGMB
13.1k2824
answered Dec 31 '18 at 21:34
GMBGMB
13.1k2824
answered Dec 31 '18 at 21:34
GMBGMB
13.1k2824
answered Dec 31 '18 at 21:34
GMBGMB
13.1k2824
13.1k2824
Thanks for your solution, GMB! This is what I need.
– FreddieMercury
Dec 31 '18 at 22:05
Hi again, GMB--not sure if you'll see this, but I've been looking up how to modify my code to have a database location that is relative to my app's home directory, and am not seeing a guide that is relevant to this exact context. It may be much simpler than I'm making it, but is there a chance you can tell me how to go about this change? Even broad explanation will guide me in the right direction. I apologize if this is really obvious! I'm a bit new to MVC and SQL. Thank you again for your solution!
– FreddieMercury
Dec 31 '18 at 22:21
add a comment |
Thanks for your solution, GMB! This is what I need.
– FreddieMercury
Dec 31 '18 at 22:05
Hi again, GMB--not sure if you'll see this, but I've been looking up how to modify my code to have a database location that is relative to my app's home directory, and am not seeing a guide that is relevant to this exact context. It may be much simpler than I'm making it, but is there a chance you can tell me how to go about this change? Even broad explanation will guide me in the right direction. I apologize if this is really obvious! I'm a bit new to MVC and SQL. Thank you again for your solution!
– FreddieMercury
Dec 31 '18 at 22:21
Thanks for your solution, GMB! This is what I need.
– FreddieMercury
Dec 31 '18 at 22:05
Thanks for your solution, GMB! This is what I need.
– FreddieMercury
Dec 31 '18 at 22:05
Hi again, GMB--not sure if you'll see this, but I've been looking up how to modify my code to have a database location that is relative to my app's home directory, and am not seeing a guide that is relevant to this exact context. It may be much simpler than I'm making it, but is there a chance you can tell me how to go about this change? Even broad explanation will guide me in the right direction. I apologize if this is really obvious! I'm a bit new to MVC and SQL. Thank you again for your solution!
– FreddieMercury
Dec 31 '18 at 22:21
Hi again, GMB--not sure if you'll see this, but I've been looking up how to modify my code to have a database location that is relative to my app's home directory, and am not seeing a guide that is relevant to this exact context. It may be much simpler than I'm making it, but is there a chance you can tell me how to go about this change? Even broad explanation will guide me in the right direction. I apologize if this is really obvious! I'm a bit new to MVC and SQL. Thank you again for your solution!
– FreddieMercury
Dec 31 '18 at 22:21
add a comment |
Short version here is that the db server still has a reference to the old location of the database. You moved it and tried to fire up the app and point to a new location of the database with the same name. The db server doesn't know how to handle that. It would be better to detach the database from the db server then move the files.
answered Dec 31 '18 at 21:15
John BabbJohn Babb
8771018
Thank you for your response, John! I'm looking up how to detach the database right now. I'm concerned though, because I need to send this app to my instructor and he would also have a problem opening it if those files cannot be moved. Is there a way to ensure he could run it on his own machine without problems?
– FreddieMercury
Dec 31 '18 at 21:21
add a comment |
Short version here is that the db server still has a reference to the old location of the database. You moved it and tried to fire up the app and point to a new location of the database with the same name. The db server doesn't know how to handle that. It would be better to detach the database from the db server then move the files.
answered Dec 31 '18 at 21:15
John BabbJohn Babb
8771018
Thank you for your response, John! I'm looking up how to detach the database right now. I'm concerned though, because I need to send this app to my instructor and he would also have a problem opening it if those files cannot be moved. Is there a way to ensure he could run it on his own machine without problems?
– FreddieMercury
Dec 31 '18 at 21:21
add a comment |
Short version here is that the db server still has a reference to the old location of the database. You moved it and tried to fire up the app and point to a new location of the database with the same name. The db server doesn't know how to handle that. It would be better to detach the database from the db server then move the files.
answered Dec 31 '18 at 21:15
John BabbJohn Babb
8771018
Short version here is that the db server still has a reference to the old location of the database. You moved it and tried to fire up the app and point to a new location of the database with the same name. The db server doesn't know how to handle that. It would be better to detach the database from the db server then move the files.
answered Dec 31 '18 at 21:15
John BabbJohn Babb
8771018
answered Dec 31 '18 at 21:15
John BabbJohn Babb
8771018
answered Dec 31 '18 at 21:15
John BabbJohn Babb
8771018
answered Dec 31 '18 at 21:15
John BabbJohn Babb
8771018
8771018
Thank you for your response, John! I'm looking up how to detach the database right now. I'm concerned though, because I need to send this app to my instructor and he would also have a problem opening it if those files cannot be moved. Is there a way to ensure he could run it on his own machine without problems?
– FreddieMercury
Dec 31 '18 at 21:21
add a comment |
Thank you for your response, John! I'm looking up how to detach the database right now. I'm concerned though, because I need to send this app to my instructor and he would also have a problem opening it if those files cannot be moved. Is there a way to ensure he could run it on his own machine without problems?
– FreddieMercury
Dec 31 '18 at 21:21
Thank you for your response, John! I'm looking up how to detach the database right now. I'm concerned though, because I need to send this app to my instructor and he would also have a problem opening it if those files cannot be moved. Is there a way to ensure he could run it on his own machine without problems?
– FreddieMercury
Dec 31 '18 at 21:21
Thank you for your response, John! I'm looking up how to detach the database right now. I'm concerned though, because I need to send this app to my instructor and he would also have a problem opening it if those files cannot be moved. Is there a way to ensure he could run it on his own machine without problems?
– FreddieMercury
Dec 31 '18 at 21:21
add a comment |
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Thank you for your answer, GMB! By changing the code in this way, to have a relative database location, would it also ensure that other people could run the app if I sent it to them?
– FreddieMercury
Dec 31 '18 at 21:23
@FreddyMercury : since this seems relevant for your use case, I am deleting my comments and posting this as an answer, please accept it if you considers that it properly responds to your question.
– GMB
Dec 31 '18 at 21:36