db connection error in sql server 2008

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i am new to visual studio 2010 and sql server 2008... but i am good with db connection in visual studio 2008 and sql server 2005.... now the worst part is after installing vs2010 i start to create database as i followed in vs2008
1)db explorer-->data connections right click and selected add connection
2)in next window i selected data source as Microsoft SQL Server Database File (SqlClient)
3)in database name i gave some name like db after tat i pressed k button... it asked for conformation message as database file does not exist would u like to create i selected yes but it shows error as
failed to generate a user instance of sql server due to failure in starting the process for the user instance. the connection will be closed

could anyone solve my prob its very urgent......

Posted 19-Oct-12 0:02am

selva_1990

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Sumit_Kumar_Sinha · Accepted Answer · 2012-10-19T00:15:00

Solution 1

VB

If you get that error message, the solution that worked for me was to clear the SQL Express user instance data store, located at:

%userprofile%\AppData\Local\Microsoft\Microsoft SQL Server Data\SQLEXPRESS
(or full path)

C:\Users\\AppData\Local\Microsoft\Microsoft SQL Server Data\SQLEXPRESS

Posted 19-Oct-12 0:15am

Sumit_Kumar_Sinha

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selva_1990 19-Oct-12 7:54am

i didnt found any "appdata" folder inside my user profile....actually i didnt install sql server 2008 separately, while installing visual studio 2010 it automatically installed.... whether i need to install sql server 2008 separately SUMIT...????

Sumit_Kumar_Sinha 19-Oct-12 7:57am

yeah...........

selva_1990 19-Oct-12 8:02am

in sql server 2008 different version are there which i need to install can u send me the link

Sumit_Kumar_Sinha 19-Oct-12 8:10am

microsoft sql server 2008 express edition