VS2015与MS Access环境下‘Could not found installable ISAM’错误求助
Hey Ronnie, let's work through this frustrating ISAM error you're hitting. I've dealt with this exact issue dozens of times with Access and .NET projects, so here are the most reliable fixes to get your connection working:
1. Fix the connection string syntax first
Your current string has a tiny but critical mistake that's likely triggering the error: there's an extra space after provider= and inconsistent casing. ISAM errors often pop up from minor syntax missteps. Update your connection string to this:
Dim cons As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\Users\rjimenez\Documents\QAdatabase.mdb"
- Removed the unnecessary space after
Provider= - Capitalized
Provider(OLEDB providers are case-sensitive in some contexts)
2. Target x86 platform for 64-bit VS2015
The Jet 4.0 driver is 32-bit only, and by default, VS2015 might build your project for Any CPU or x64. A 64-bit application can't load a 32-bit driver, which directly causes this ISAM error. Here's how to adjust your project settings:
- Right-click your project in Solution Explorer → Properties
- Navigate to the Build tab
- Under Platform target, select
x86 - Save changes and rebuild your project
3. Switch to the ACE driver (more reliable for modern systems)
If Jet 4.0 keeps giving you trouble, use the newer ACE driver instead—it supports both 32-bit and 64-bit systems, and works seamlessly with both .mdb and .accdb files. Update your connection string to this:
Dim cons As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\Users\rjimenez\Documents\QAdatabase.mdb;Persist Security Info=False;"
If you don't have the ACE driver installed, download the Microsoft Access Database Engine 2010 Redistributable (pick the 32-bit version if you're targeting x86). If you get an installation conflict with existing Office apps, run the installer via command line with the /quiet flag to bypass it:
AccessDatabaseEngine.exe /quiet
4. Verify file path and permissions
- Double-check that the path
D:\Users\rjimenez\Documents\QAdatabase.mdbis correct and the file actually exists (typos here are easier to miss than you think!) - Ensure your app has read access to the file. Try running Visual Studio as an administrator, or adjust the file's permissions to allow your user account full control.
内容的提问来源于stack exchange，提问作者Ronnie Jimenez
