SQL Server CE不兼容的数据库版本 [英] SQL Server CE Incompatible Database Version

问题描述

我有一个SQL Server CE 4.0数据库(.sdf文件)，当我尝试从应用程序(WPF)对数据库进行查询时，出现以下错误.

I have a SQL Server CE 4.0 database (.sdf file) and when I trying doing a query on the database from my application (WPF) I get the following error.

不兼容的数据库版本.如果这是兼容文件，请运行修复.对于其他情况，请参考文档. [Db版本= 4000000，请求版本= 3505053，文件名= \?\ C:\ Database \ ShortageReport \ MRPDatabase.sdf]

Incompatible Database Version. If this was a compatible file, run repair. For other cases refer to documentation. [ Db version = 4000000,Requested version = 3505053,File name = \?\C:\Database\ShortageReport\MRPDatabase.sdf]

• 我已检查已安装SQL Server CE 4 sp1.
• 我曾尝试在Database.Net 4和vs2012中的连接设置中创建数据库.
• 我正在运行Windows 7 64bit
• 我的连接字符串存储在app.config中.
• I have checked SQL Server CE 4 sp1 is installed.
• I have tried creating the database in both Database.Net 4 and in the connection setup in vs2012.
• I'm running windows 7 64bit
• My connection string is stored in the app.config.

我正在使用SQL Server Compact Toolbox来生成上下文和映射.

I am using SQL Server Compact Toolbox to generate the context and the mappings.

我的app.config:

<connectionStrings>
    <add name="DatabaseContext" 
         providerName="System.Data.SqlServerCe.4.0" 
         connectionString="Data Source=C:\Database\ShortageReport\MRPDatabase.sdf"/>
</connectionStrings>

有什么想法吗?

推荐答案

添加对版本4.0 System.Data.SqlServerCe.dll ADO.NET提供程序的引用

Add a reference to the version 4.0 System.Data.SqlServerCe.dll ADO.NET provider

然后使用SqlCeConnection(4.0)对象初始化DataContext类.

Then initialize the DataContext class with a SqlCeConnection (4.0) object.

using (SqlCeConnection conn = new SqlCeConnection(@"Data Source=C:\projects\Chinook\Chinook40.sdf"))
{
    using (Chinook db = new Chinook(conn))
    {
        var list = db.Album.ToList();
        if (list.Count > 0)
            System.Diagnostics.Debug.Print("It works!");
    }
}

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