On visual studio 2010 can't add .mdf database

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I was going to add .mdf database file to my asp.net project file, but while adding it shown me this error
"Connection to SQL database files(.mdf)require SQL server 2005 express or SQL server 2008 express to be installed and running on the local computer, The current version of SQL server can be download on this liink http://..." But i have already installed full version of SQL server 2008.. What should i do now...?

What I have tried:

I installed sql server express but still can't add .mdf database to my project...

Posted 2-Sep-16 16:02pm

Member 10710534

Updated 2-Sep-16 19:36pm

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Daniel Jones · Answer 1 · 2016-09-02T18:18:00

Solution 1

On Visual Studio
> Go to Tools
> Options
> Database Tools
> Data Connections
Clear the SQL Server Instance Name (blank for default) option and write SQLEXPRESS

Posted 2-Sep-16 18:18pm

Daniel Jones

Hussain Patel · Answer 2 · 2016-09-02T19:36:00

The solution is simple. you can do that easily..
On this path C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\Machine.config. based on .NET framework version you are using. There is an entry to the localserver database, change the datasource to that name from where datasource you got the .mdf file..

currently in your case, in the machine config, the localsqlserver datasource name and the the .mdf data source name seem to be different and so the error..

Hope this helps.