为什么我突然收到此错误连接处理？

Question

与当前连接关联的事务已完成但尚未处理。必须先处理事务，然后才能使用连接执行SQL语句。

protected string installDatabase(string connectionString, bool createSampleData,string scriptpath)
{
    //uncomment this line to support transactions
    using (var scope = new System.Transactions.TransactionScope())
    {
        string scriptsFolder = scriptpath + "\\install\\Scripts";
        string createDatabaseFile = string.Format(@"{0}\{1}", scriptsFolder, "Campus.sql");
        string error = proceedSQLScripts(createDatabaseFile, connectionString);
        if (!String.IsNullOrEmpty(error))
        {
            return error;
        }
        scope.Complete();    
    }
    return "true";
}      

protected string proceedSQLScripts(string pathToScriptFile, string connectionString)
{
    List<string> statements = new List<string>();
    SqlConnection conn = new SqlConnection(connectionString);
    conn.Open();
    using (Stream stream = File.OpenRead(pathToScriptFile))
    using (StreamReader reader = new StreamReader(stream))
    {
        string statement = string.Empty;
        while ((statement = readNextStatementFromStream(reader)) != null)
        {
            statements.Add(statement);
        }
    }
    try
    {
        foreach (string stmt in statements)
        {
            {
                SqlCommand command = new SqlCommand(stmt, conn);
                command.ExecuteNonQuery(); 
                //conn.Close();
            }
        }
    }
    catch (Exception ex)
    {
        return ex.Message;
    }
    finally
    {       
        conn.Close();
    }
    return string.Empty;
}

Answer 1

尝试以下代码

 Finally
     {
        conn.Close();
        conn.Dispose(); 
    }