Attach DB to SQL server: string.format problem

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Hello,
I am trying to attach exisitng database to SQL Server 2008.
When I use:

str = String.Format("EXEC sp_attach_db @dbname = '{0}',@filename1 = '{1}',@filename2 = '{2}'", databaseName, mdfFile, ldfFile);
com = new SqlCommand(str, myConn);

I get an error: Unable to open the physical file "C:\TestDB\MyProgram_Data.mdf". Operating system error 2: "2(error not found)".

What I have tried:

But when I use:

str = "EXEC sp_attach_db @dbname = N'MyProgram' ,@filename1 = N'C:\\TestDB\\MyProgram\\MyProgram_Data.mdf',@filename2 = N'C:\\TestDB\\MyProgram\\MyProgram_Log.ldf'";

Everything is OK.

Why I am not able to use string.Format()?

Posted 18-May-17 5:40am

stivanov

Updated 18-May-17 5:50am

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CHill60 18-May-17 11:44am

What are the values of databaseName, mdfFile and ldfFile? If they have the double backslashes \\ then it won't work.
If you put a breakpoint on com = new SqlCommand(str, myConn); does str contain exactly what you have in your string literal version?

2 solutions

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F-ES Sitecore · Accepted Answer · 2017-05-18T05:48:00

Solution 1

So this works

C:\TestDB\MyProgram\MyProgram_Data.mdf

...and this doesn't

C:\TestDB\MyProgram_Data.mdf

Spot the difference?

"mdfFile" and "ldfFile" do not have the correct values that match where your database is.

Posted 18-May-17 5:48am

F-ES Sitecore

Comments

stivanov 18-May-17 16:57pm

Indeed :) Thanks

OriginalGriff · Accepted Answer · 2017-05-18T05:50:00

Solution 2

Because the path is wrong:

Unable to open the physical file "C:\TestDB\MyProgram_Data.mdf".

Doesn't work, but:

str = "EXEC sp_attach_db @dbname = N'MyProgram' ,@filename1 = N'C:\\TestDB\\MyProgram\\MyProgram_Data.mdf'

Does. It has an extra folder name in there: "MyProgram"

Posted 18-May-17 5:50am

OriginalGriff

Comments

stivanov 18-May-17 16:57pm

You are right. Thank you :)

OriginalGriff 18-May-17 17:11pm

You're welcome!