How to deal with database transaction issues in C# development

How to handle database transactions in C# development requires specific code examples

Introduction:
In C# development, the processing of database transactions is very important technology. Through transaction processing, we can ensure the consistency and integrity of database operations and improve the stability and security of the system. This article will introduce how to handle database transactions in C# and give specific code examples.

1. Introduction to database transactions
A database transaction is a logical unit of database operations, which can be composed of one or more operations. Transactions have four basic properties, namely atomicity, consistency, isolation and durability, which are often referred to as ACID properties.

Atomicity: Either all operations in a transaction are executed, or none are executed.
Consistency: The database remains in a consistent state before and after transaction execution.
Isolation: The execution of transactions will not interfere with each other, and each transaction considers itself to be the only one executing.
Durability: Once a transaction is submitted, its results will be permanently stored in the database.

Database transaction processing in C# is mainly implemented through the Transaction class in ADO.NET. The following will introduce how to use the Transaction class in C# to handle database transaction issues.

2. Examples of database transaction processing in C
#Example 1: Open a transaction and submit

using (SqlConnection connection = new SqlConnection(connectionString))
{
    connection.Open();

    // 开启事务
    using (SqlTransaction transaction = connection.BeginTransaction())
    {
        try
        {
            // 执行一系列数据库操作

            // 提交事务
            transaction.Commit();
        }
        catch (Exception ex)
        {
            // 发生异常，回滚事务
            transaction.Rollback();

            // 处理异常
            Console.WriteLine("发生异常：" + ex.Message);
        }
    }
}

Example 2: Set the isolation level of the transaction

using (SqlConnection connection = new SqlConnection(connectionString))
{
    connection.Open();

    // 开启事务，并设置隔离级别为Serializable
    using (SqlTransaction transaction = connection.BeginTransaction(IsolationLevel.Serializable))
    {
        try
        {
            // 执行一系列数据库操作

            // 提交事务
            transaction.Commit();
        }
        catch (Exception ex)
        {
            // 发生异常，回滚事务
            transaction.Rollback();

            // 处理异常
            Console.WriteLine("发生异常：" + ex.Message);
        }
    }
}

Example 3: Transaction processing across multiple databases

using (SqlConnection connection1 = new SqlConnection(connectionString1))
using (SqlConnection connection2 = new SqlConnection(connectionString2))
{
    connection1.Open();
    connection2.Open();

    // 开启事务
    using (SqlTransaction transaction1 = connection1.BeginTransaction())
    using (SqlTransaction transaction2 = connection2.BeginTransaction())
    {
        try
        {
            // 在connection1上执行一系列数据库操作

            // 在connection2上执行一系列数据库操作

            // 提交事务
            transaction1.Commit();
            transaction2.Commit();
        }
        catch (Exception ex)
        {
            // 发生异常，回滚事务
            transaction1.Rollback();
            transaction2.Rollback();

            // 处理异常
            Console.WriteLine("发生异常：" + ex.Message);
        }
    }
}

3. Summary
By using the Transaction class in C#, we can easily handle database transaction issues and ensure the consistency and integrity of database operations. In actual development, we need to select an appropriate transaction isolation level based on specific business needs and system requirements, and commit or rollback transactions according to specific circumstances to ensure the validity and stability of data.

The above is an introduction and sample code for handling database transaction issues in C# development. I hope to be helpful!

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