Question

如何在使用后强制对象处理以释放内存？而且，你如何强制GC收集？

这是我的保存代码。我注意到，每次执行此函数时，我的内存消耗都会上升，最终会在几次点击后导致内存不足错误。

protected void btnSaveEmptyOC_Click(object sender, EventArgs e)
{


    try
    {

        if (ViewState["ServiceDetailID"].ToString() != null)
        {
            CashExpense tblCashExpenses = new CashExpense();
            Guid CashExpensesID = Guid.NewGuid();

            tblCashExpenses.CashExpensesID = CashExpensesID;


            tblCashExpenses.ServiceDetailsID = new Guid(ViewState["ServiceDetailID"].ToString());

            tblCashExpenses.Description = txtDescriptionEmptyOC.Text;
            tblCashExpenses.Quantity = Decimal.Parse(txtQTYEmptyOC.Text);
            tblCashExpenses.UnitCost = Decimal.Parse(txtUnitCostEmptyOC.Text);
            tblCashExpenses.CreatedBy = User.Identity.Name;
            tblCashExpenses.DateCreated = DateTime.Now;
            tblCashExpenses.CashExpensesTypeID = "OTHER";

            CashExpenses_worker.insert(tblCashExpenses);
            CashExpenses_worker.submit();
            //Clear items after saving
            txtDescriptionEmptyOC.Text = "";
            txtQTYEmptyOC.Text = "";
            txtUnitCostEmptyOC.Text = "";


            ValidationMessage.ShowValidationMessage(MessageCenter.CashExpenseMaintenace.InsertOC2, "SaveEmptyOC", this.Page);
            MyAuditProvider.Insert(this.GetType().ToString(), ViewState["MarginAnalysisID"].ToString(), MessageCenter.Mode.ADD, MessageCenter.CashExpenseMaintenace.InsertOC2, Page.Request, User);
            divOtherCost.Visible = false;
            grd_othercost.Visible = true;
            btnaddothercost.Visible = true;

            tblCashExpenses = null;
        }
        else
        {
            ValidationMessage.ShowValidationMessage(MessageCenter.CashExpenseMaintenace.SaveServiceDetailOC, "SaveEmptyOC", this.Page);
        }
    }
    catch
    {
        ValidationMessage.ShowValidationMessage(MessageCenter.CashExpenseMaintenace.InsertOCError, "SaveEmptyOC", this.Page);
    }

    finally
    {
        //Rebinds the Grid
        populategrd_othercost();
        Dispose();
        GC.SuppressFinalize(this);
    }
}

这是我的业务层类

public class CashExpensesBL
{
    CEADataStoreDataContext CashExpensesDB = new CEADataStoreDataContext();

    public IEnumerable<CashExpense> get()
    {
        return CashExpensesDB.CashExpenses;
    }
    public IEnumerable<CashExpense> get(Expression<Func<CashExpense, Boolean>> express)
    {
        return CashExpensesDB.CashExpenses.Where(express);
    }
    public void insert(CashExpense item)
    {
        CashExpensesDB.CashExpenses.InsertOnSubmit(item);
    }
    public void delete(CashExpense item)
    {
        CashExpensesDB.CashExpenses.DeleteOnSubmit(item);
    }
    public void deleteDC(Guid servicedetailid)
    {
        CashExpensesDB.sp_deleteDefaultCost(servicedetailid);
    }
    public void submit()
    {
        CashExpensesDB.SubmitChanges();
    }
}

Answer 1

您应该处置DataContext。我无法看到它被移除到任何地方，因此连接将保持打开状态并且可以保持引用（阻止GC将其拾取）。这可能是导致问题的原因。如果您不想手动处理，则可以在using块内执行事务。

编辑以响应业务层更新 -

您可以将方法包装在using块中，如下所示：

public void insert(CashExpense item)
{    
   using(CEADataStoreDataContext CashExpensesDB = new CEADataStoreDataContext())
   {
       CashExpensesDB.CashExpenses.InsertOnSubmit(item); 
       CashExpensesDB.SubmitChanges();
   }
}

Answer 2

将空值分配给引用对象的变量，使用GC.Collect();强制进行垃圾回收。您可能需要连续两次调用它来加速不可访问的对象。

Answer 3

将对象设置为null，然后调用：

GC.Collect的（）; GC.WaitForPendingFinalizers（）;

如何强制处理对象/ GC

3 个答案: