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如果在 c# 中有任何失败，这不是回滚 sql 事务的重复问题。但是这个问题是基于上一个问题的内容。感谢所有对我的最后一个问题发表意见的人。我尝试了所有这些解决方案，最终发现我在我的应用程序（DDL）中使用的脚本在多语句事务中是不允许的。

我的整个代码是这样的：

script1 = "CREATE USER " + username + " FROM LOGIN " + username;

script2 = "CREATE ROLE " + rolename;

script3 = @"CREATE ROLE [db_execute] AUTHORIZATION [dbo]
                        GRANT EXECUTE TO [db_execute]";

script4 = @"DECLARE @rolename varchar(max)
                    SET @rolename ='{0}'
                    EXEC sp_addrolemember N'db_execute',@rolename
                    EXEC sp_addrolemember N'db_datareader', @rolename
                    EXEC sp_addrolemember N'db_datawriter', @rolename";
script_result = string.Format(script4, rolename);

script6 = "EXEC sp_addrolemember '{0}', '{1}'";
            outp = string.Format(script6, rolename, username);

script7 = @"select m.name as Member, r.name as Role
                    from sys.database_role_members
                    inner join sys.database_principals m on sys.database_role_members.member_principal_id = m.principal_id
                    inner join sys.database_principals r on sys.database_role_members.role_principal_id = r.principal_id";

并以相同的方式执行所有这些，如下所示：

SqlCommand SqlCmd = new SqlCommand();

//Create User Script Execution
SqlCmd.CommandText = script1;
SqlCmd.Connection = oConnection;        
lvinfo.Items.Add("Executing Create User script in " + dbname + " database");
var answer = SqlCmd.ExecuteNonQuery();

//Checking whether execution completed successfully
if (!answer.Equals(0))
{
lvinfo.Items.Add("Create User script executed successfully in " + dbname + " database");                                                                          
}
else
{
lvinfo.Items.Add("Create User script execution failed in " + db_select.SelectedItem.ToString() + " database");
}

尽管我只写了这段代码，但现在我对这些脚本的执行有些怀疑。上面显示的所有脚本都是一次执行的，只需单击一个按钮。我想知道的是，这些脚本会一次完全执行吗？意味着，一次执行这些脚本时是否有执行失败的机会？以数据库断开连接或任何其他错误的形式出现的可能性。

让我向您展示一个我要问的示例：如果以某种方式执行了前 3 个脚本，并且所有其余脚本都失败了，那么是否有机会自动回滚？

或者我的代码是否在整个代码执行之前检查任何错误或失败机会，以便它不需要回滚？

任何人都可以用他们宝贵的建议和想法支持我..

任何帮助将非常感激..

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1 回答 1

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我已经给出了它可能看起来的骨架。你可以告诉我你想回滚什么和什么不是场景。

var scriptToExecute = new Dictionary<int, string>();
            var scriptToRollback = new Dictionary<int, string>();

        try
        {
            using (SqlCommand SqlCmd = new SqlCommand())
            {
                //Create User Script Execution
                SqlCmd.CommandText = script1;
                SqlCmd.Connection = oConnection;
                lvinfo.Items.Add("Executing Create User script in " + dbname + " database");
                var answer = SqlCmd.ExecuteNonQuery();

                //Checking whether execution completed successfully
                if (!answer.Equals(0))
                {
                    lvinfo.Items.Add("Create User script executed successfully in " + dbname + " database");
                }
                else
                {
                    lvinfo.Items.Add("Create User script execution failed in " + db_select.SelectedItem.ToString() + " database");
                }
            }
        }
        catch (SqlException)
        {
            string rollbackScript = string.Empty;
            for (int i = scriptExecuting; i > 0; i--)
            {
                scriptToRollback.TryGetValue(i, rollbackScript);
                if (!string.IsEmpty(rollbackScript))
                {
                    //Execute the scripts here.
                }
            }
        }



        finally
        {
            //If connection is open then close the active connection
        }
于 2013-09-25T12:36:49.187 回答