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一组业务整体处理的行为叫一个事务。这一组的业务都能成功处理，我们就可以把这个事务提交来保存你已做的行为结果。事物的Commit是执行了你的方法进行了数据库的提交，之前的sava都是放在缓存中并没有执行到数据库。
这个写法最像ado.net的事务提交。需要引用System.Transactions命名空间。
var invoiceDetailOriginal = InvoiceDetailService.Query(m => m.DetailID == 86).FirstOrDefault();
using (TransactionScope transaction = new TransactionScope())
{
try
{
List<BL_Invoice> invoiceLst = new List<BL_Invoice>();
List<BL_InvoiceDetail> detailLst = new List<BL_InvoiceDetail>();
var lst = InvoiceService.Query(m => m.ID > 49).ToList();
for (int n = 0; n < 3; n++)
{
BL_Invoice i = new BL_Invoice()
{
IsWD = lst[n].IsWD,
IsAzure = lst[n].IsAzure,
InvoiceNumber = lst[n].InvoiceNumber,
InvoiceDate = DateTime.Now,
BITTYPE = lst[n].BITTYPE,
BPexternalID = lst[n].BPexternalID,
CAexternalID = lst[n].CAexternalID,
Amount = lst[n].Amount,
IsMETHODSynced = false,
METHOD_INCC = (n == 1) ? "XXXX" : "P",
CreatedDate = DateTime.Now
};
BL_InvoiceDetail d = new BL_InvoiceDetail()
{
BL_Invoice = i,
BITREF32 = invoiceDetailOriginal.BITREF32,
MSSKU = (n == 1) ? "存二十个汉字；存二十个汉字；存二十个汉字；存二十个汉字；存二十个汉字。" : invoiceDetailOriginal.MSSKU,
Amount = invoiceDetailOriginal.Amount,
Tax = invoiceDetailOriginal.Tax,
DeferralAmount = invoiceDetailOriginal.DeferralAmount,
BITDATE_FROM = invoiceDetailOriginal.BITDATE_FROM,
BITDATE_TO = invoiceDetailOriginal.BITDATE_TO,
CreatedDate = DateTime.Now
};
InvoiceService.Add(i);
InvoiceDetailService.Add(d); //到这一步出错，然后看添加invoice也没有添加上。 这就是事务的作用。当然entity的savaChangge() 也可以看做是一个事务。
transaction.Complete();
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
transaction.Dispose();
}
插入一两个相关的list。list中有一条出错，整个事务回滚。利用的 reponsitory的 IUnitOfWork。
List<BL_Invoice> invoiceLst = new List<BL_Invoice>(); List<BL_InvoiceDetail> detailLst = new List<BL_InvoiceDetail>(); var lst = InvoiceService.Query(m => m.ID > 49).ToList(); for (int n = 0; n < lst.Count();n++) { BL_Invoice i = new BL_Invoice() { IsWD = lst[n].IsWD, IsAzure = lst[n].IsAzure, InvoiceNumber = lst[n].InvoiceNumber, InvoiceDate = DateTime.Now, BITTYPE = lst[n].BITTYPE, BPexternalID = lst[n].BPexternalID, CAexternalID = lst[n].CAexternalID, Amount = lst[n].Amount, IsMETHODSynced = false, METHOD_INCC =(n==1)?"XXX":"P", CreatedDate = DateTime.Now }; invoiceLst.Add(i); var invoiceDetailOriginal = InvoiceDetailService.Query(m => m.DetailID == 86).FirstOrDefault();//lst[n].BL_InvoiceDetail.FirstOrDefault(); BL_InvoiceDetail d = new BL_InvoiceDetail() { BL_Invoice = i, BITREF32 = invoiceDetailOriginal.BITREF32, MSSKU = (n == 1) ? "存二十个汉字；存二十个汉字；存二十个汉字；存二十个汉字；存二十个汉字。" : invoiceDetailOriginal.MSSKU, Amount = invoiceDetailOriginal.Amount, Tax = invoiceDetailOriginal.Tax, DeferralAmount = invoiceDetailOriginal.DeferralAmount, BITDATE_FROM = invoiceDetailOriginal.BITDATE_FROM, BITDATE_TO = invoiceDetailOriginal.BITDATE_TO, CreatedDate = DateTime.Now }; detailLst.Add(d); } InvoiceService.AddRange(invoiceLst, detailLst);
总体来说Entity Framework中的数据库操作无不体现着事务的关联性，毕竟这也是合理的要求。比ado.net中操作简单方便。
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原文地址：http://www.cnblogs.com/sunShineJing/p/4615456.html
