C#•17mo ago•

12 replies

SqlConnection Connection Disposed

Hi all,

I have class library which provides a custom type called

SqlServerAccessor

SqlServerAccessor

This custom type wraps a

SqlConnection

SqlConnection

and its ctor accepts a connection string, news up a

SqlConnection

SqlConnection

, and calls

_connection.Open()

_connection.Open()

.
This type implements

IDisposable

IDisposable

and is intended to be used as follows:

try
{
    using var sql = new SqlServerAccessor(connectionString);
    DataTable result = sql.ExecuteQuery(...);
    // Do something with the result
}
catch (Exception ex)
{
    // Sql connection failed
}

try
{
    using var sql = new SqlServerAccessor(connectionString);
    DataTable result = sql.ExecuteQuery(...);
    // Do something with the result
}
catch (Exception ex)
{
    // Sql connection failed
}

Internally, I have a method called

EnsureNotDisposed()

EnsureNotDisposed()

to handle use after the type has been disposed which throws an

InvalidOperationException

InvalidOperationException

stating the underlying

SqlConnection

SqlConnection

has been disposed.
Using the code sample from above, this catch is always hit and the sql connection is always closed. There does not seem to be a "keep alive" function or anything - my understanding is that

SqlConnection

SqlConnection

should keep its connection open until it is manually closed.

I could connect and disconnect for each operation, which might resolve the issue, but the intent is for it to be used in a small using scope like this and calling

Dispose()

Dispose()

Close()

Close()

is responsible for closing the connection.

Any idea why the connection is being closed immediately after leaving the ctor?

SqlConnection Connection Disposed

Hi all,

I have class library which provides a custom type called

SqlServerAccessor

SqlServerAccessor

This custom type wraps a

SqlConnection

SqlConnection

and its ctor accepts a connection string, news up a

SqlConnection

SqlConnection

, and calls

_connection.Open()

_connection.Open()

.
This type implements

IDisposable

IDisposable

and is intended to be used as follows:

try
{
    using var sql = new SqlServerAccessor(connectionString);
    DataTable result = sql.ExecuteQuery(...);
    // Do something with the result
}
catch (Exception ex)
{
    // Sql connection failed
}

try
{
    using var sql = new SqlServerAccessor(connectionString);
    DataTable result = sql.ExecuteQuery(...);
    // Do something with the result
}
catch (Exception ex)
{
    // Sql connection failed
}

Internally, I have a method called

EnsureNotDisposed()

EnsureNotDisposed()

to handle use after the type has been disposed which throws an

InvalidOperationException

InvalidOperationException

stating the underlying

SqlConnection

SqlConnection

SqlConnection

SqlConnection

Dispose()

Dispose()

Close()

Close()

is responsible for closing the connection.

Any idea why the connection is being closed immediately after leaving the ctor?

SqlConnection Connection Disposed

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