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Exception thrown in SSCE 3.5 Beta2 but not in 3.5 beta1and early versions（来自MSDN Forum）

Posted on 2007-11-07 20:15 江南白衣阅读(103) 评论(0) 编辑收藏所属分类: Database

原文地址：http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2001893&SiteID=1 I replace
I replace the reference assembly System.Data.SqlServerCe with version 3.5 beta2 in Microsoft.Practices.EnterpriseLibrary.Data.SqlCe. When I used the Data.SqlCe block in application, an exception ("Cannot access a disposed object named SqlCeConnection") threw. This didn't occur in SSCE 3.5 beta1 and early versions.

Finally I found the difference between beta1 and beta2.

In the SqlCeConnection class, there is a RemoveWeakReference method. this is code snippet of beta1:

internal void RemoveWeakReference(object value) { if (this.weakReferenceCache != null) { this.weakReferenceCache.Remove(value); } }

and this is for beta2:



    
        
            
            internal void RemoveWeakReference(object value)
            {
            if (this.weakReferenceCache == null)
            {
            throw new ObjectDisposedException("SqlCeConnection");
            }
            this.weakReferenceCache.Remove(value);
            }

So, if we dispose a connection before a command, such as:

SqlCeConnection cn;

SqlCeCommand cmd;

...

cn.Dispose();

cmd.Dispose(); // Error, an exception will be threw.

Is it a bug of Beta2?

=================================================
This is a issue in Beta2. Most probably we will fix in SSCE 3.5 RTM. The Bug Id: 13211 tracks this issue.

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