Member Avatar for dhawalchauhan

Hi I need an urgent help......


I Have made a project on C# where i have use MS-SQL as a database....after that i have published the program which creats exe of my program.......after creating exe


1) I download .net framework 3.5 to friends computer.
2) Then i install MS_SQL Server 2005 to friends computer.
3) Then i install that my project there.


.................Now when i run my project i gives database error......Please help me
to resolve the error and what 2 do next? thanx in advance.........

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  • Latest Post Latest Post by srikaaanth

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Common causes for a “database error” after publishing: wrong connection string (wrong server/instance name or authentication mode), the database file was not attached or deployed, SQL Server service or SQL Browser not running, or file/Windows permissions preventing access. As requested, the exact exception text and stack trace are the fastest way to pinpoint the issue.

Practical checklist to diagnose the problem:

  1. Verify SQL Server services are running (SQL Server and SQL Server Browser for named instances) and TCP/IP is enabled.
  2. Try connecting from the target machine with SQL Server Management Studio or sqlcmd using the same server/credentials the app uses.
  3. Confirm the connection string in the deployed app.config/web.config matches the server/instance and uses the correct authentication (Integrated Security vs SQL login). @srikaaanth's “localhost” is fine on a single machine, but a named instance needs the instance part (for example .\SQLEXPRESS) and remote access requires SQL Browser and TCP/IP.
  4. If the app used an .mdf during development, confirm whether the published app expects an attached database or an attached file; ensure the .mdf was deployed, placed where the app expects, and the SQL Server account can attach/open it.

Common solutions and deployment choices:

  • Create an installer that runs SQL scripts or restores a .bak to create the database and users (recommended for production). ' setup project idea fits here.
  • Ship a database file and use AttachDbFilename with SQL Express or LocalDB (simpler for single-user desktop apps).
  • Replace the server dependency with an embedded DB (SQL Server Compact, LocalDB, or SQLite) if a server install is unacceptable, as hinted.

For targeted troubleshooting, collect: the exact error message, the deployed connection string, SQL Server version/instance name, and whether the app expects an attached .mdf or a database already created in the server.

Recommended Answers

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Member Avatar for Ketsuekiame

You will need to post the exact error you're getting.

Member Avatar for anerchy

there's a way that you dont need to install sql but i cant remember it now. search for it

Member Avatar for arunkumars

instead of publishing the project,
use the VS to create the exe of ur project.
File -> New Project ->
there is Other Project types, under that there is Setup and Deployment.
click on that, and from here, there is a thread that i have post few months back, have a look at it.
I ll search it for u.

Member Avatar for srikaaanth

Hi
Please change the configuation of server in the configuration of your friend system config file

Change the name of the Server as localhost in the Connection String

Edited by happygeek because: TEX tags removed
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