Question

我有一个方法（带WebMethod属性），我定义了一个事务，在我的方法和事务中我调用了2个存储过程，第一个是GetAllBook：

select * 
from Book_TBL 
where IsActive = 'True'

，第二个是updateBook：

update Book_TBL 
set IsActive = 'False' 
where IsActive = 'True'

和我的方法：

 public struct BOOK
 {
        public string BOOK_NAME;
        public string BOOK_DESC;          
 }

[WebMethod]
public static List<BOOK> GetMyBooks()
{
    using (TransactionScope _transactionScope = new TransactionScope(TransactionScopeOption.Required))
    {
        string _connString = "Data Source=.;Initial Catalog=BookStore;Integrated Security=True";
        SqlConnection _conn = new SqlConnection(_connString);
        _conn.Open();

        SqlCommand _com = new SqlCommand();
        _com.CommandType = System.Data.CommandType.StoredProcedure;
        _com.CommandText = "GetAllBook";
        _com.Connection = _conn;

        SqlDataAdapter bookdataAdapter = new SqlDataAdapter(_com);
        DataSet bookDS = new DataSet();
        bookdataAdapter.Fill(bookDS, "Book_TBL");

        List<BOOK> bookList = new List<BOOK>();
        _conn.Close();

        BOOK book;

        foreach (DataRow dr in bookDS.Tables["Book_TBL"].Rows)
        {
            book = new BOOK();
            book.BOOK_NAME = dr["book_name"].ToString();
            book.BOOK_DESC = dr["book_desc"].ToString();
            bookList.Add(book);
        }

        SqlCommand updateCommand= new SqlCommand();
        _conn.Open();
        updateCommand.CommandText = "updateBook";
        updateCommand.CommandType = System.Data.CommandType.StoredProcedure;
        updateCommand.Connection = _conn;
        updateCommand.ExecuteNonQuery();
        _conn.Close();

        return bookList;
   }
}

当我运行项目时myMethod向我提供了IsActive = True但没有更新我的桌子的书籍列表！有什么问题？

Answer 1

你必须调用TransactionScope.Complete，相当于一个提交。没有它，使用块处理它，这相当于回滚。

Answer 2

我不知道你真正想用这种深层嵌套的方法做什么，但你应该先把所有东西都放在第一位：

public class Book
{
    public string Name { get; set; }
    public string Description { get; set; }
}

    public static List<Book> GetMyBooks()
    {
        var bookList = new List<Book>();
        using (var transactionScope = new TransactionScope(TransactionScopeOption.Required))
        {
            const string connString = "Data Source=.;Initial Catalog=BookStore;Integrated Security=True";
            using (var conn = new SqlConnection(connString))
            {
                using (var com = new SqlCommand())
                {
                    com.CommandType = CommandType.StoredProcedure;
                    com.CommandText = "GetAllBook";
                    com.Connection = conn;

                    using (var bookdataAdapter = new SqlDataAdapter(com))
                    {
                        using (var bookDataSet = new DataSet())
                        {
                            bookdataAdapter.Fill(bookDataSet, "Book_TBL");

                            foreach (DataRow dr in bookDataSet.Tables["Book_TBL"].Rows)
                            {
                                bookList.Add(new Book
                                {
                                    Name = dr["book_name"].ToString(),
                                    Description = dr["book_desc"].ToString()
                                });
                            }

                            using (var updateCommand = new SqlCommand())
                            {
                                updateCommand.CommandText = "updateBook";
                                updateCommand.CommandType = CommandType.StoredProcedure;
                                updateCommand.Connection = conn;
                                updateCommand.ExecuteNonQuery();
                            }
                        }
                    }
                }
            }

            transactionScope.Complete();

            return bookList;
        }
    }

如前所述，你必须手动提交交易。

Answer 3

你应该像这样使用课程SqlTransaction：

using (SqlConnection cn = new SqlConnection())
{
    cn.Open();
    using (SqlTransaction tr = cn.BeginTransaction())
    {
        //some code
        tr.Commit();
    }
}

为什么我的交易不起作用？

3 个答案: