Linq to sql中如何使用一个统一事务保存级联表格

需要使用到DataContext的嵌套

服务代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.Linq;
using System.Configuration;

namespace CsharpTrainer.Linq.Service.Northwind
{
public class CascadeTableService
{
public bool AddCascadeTables(CascadeA tableA, List<CascadeB> tablesB, List<CascadeC> tablesC)
{
bool result;

try
{
using (DataContext context = new DataContext(ConfigurationManager.ConnectionStrings["NorthwindConnStr"].ToString()))
{
using (NorthwindDBDataContext northwindContext = new NorthwindDBDataContext())
{
northwindContext.CascadeA.InsertOnSubmit(tableA);
northwindContext.CascadeB.InsertAllOnSubmit(tablesB);
northwindContext.CascadeC.InsertAllOnSubmit(tablesC);

northwindContext.SubmitChanges();
}

}

result = true;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);

result = false;
}

return result;
}
}
}

客户端测试代码如下：

Guid caId, cbId, ccId;

caId = Guid.NewGuid();
CascadeA tableA = new CascadeA
{
CaId = caId,
CaContent = "Content A1"
};

List<CascadeB> tablesB = new List<CascadeB>();
List<CascadeC> tablesC = new List<CascadeC>();
CascadeB tableB;
CascadeC tableC;
for (int i = 1; i <= 3; i++)
{
cbId = Guid.NewGuid();
tableB = new CascadeB
{
CbId = cbId,
CaId = caId,
CbContent = "Content B" + i.ToString()
};
tablesB.Add(tableB);

for (int j = 1; j <= 3; j++)
{
ccId = Guid.NewGuid();
tableC = new CascadeC
{
CcId = ccId,
CbId = cbId,
CcContent = "Content C" + i.ToString() + j.ToString()
//CcContent = sb.ToString()
};
tablesC.Add(tableC);
}
}

CascadeTableService service = new CascadeTableService();
bool result = service.AddCascadeTables(tableA, tablesB, tablesC);
if (result)
Console.WriteLine("Add Cascade Tables Successfully!");
else
Console.WriteLine("Failed to add cascade tables!");