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pulic abstract class BaseBusiness
{
private DataContext mDataContext;
protected DataContext DataContext
{
get{if(mDataContext == null) throw new Exception(",,,");
set{mDataContext = value;}
}
}
//重点是下面这一块
public pracial class Product :BaseBusiness
{
public Product GetInstanceByCode(string productCode)
{
var ctx = new DataContext(connection,....);
var obj= ctx.Products.Signle(p=>p.code == productCode);
obj.DataContext = cxt;
return obj;
}
private save()
{
this.DataContext.submitchanage();
}
}