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我想要觸發事件時遇到Event對象爲空的問題。在這裏和在網絡上還有其他的線程這一點:在UserControls(ASP.NET)中觸發事件 - 事件對象爲空?
- asp.net: send an object's event from a UserControl to its Parent
- http://objectmix.com/csharp/120067-event-object-null-when-event-fired-webusercontrol-asp-net-ajax.html
不過,我已經根據什麼是在那些崗位推薦試過,但該事件對象爲null 。下面是代碼:
在我的網頁是誰聽的事件:之前的事件(下)發射
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
fieldCustomer1.CustomerSelected += new UserControls.Field_Customer.uintDelegate(fieldCustomer1_CustomerSelected);
}
}
以上的Page_Load執行好。
在包含事件的用戶控件的代碼:
public partial class Field_Customer : System.Web.UI.UserControl
{
public delegate void uintDelegate(uint id);
public event uintDelegate CustomerSelected;
// ... yada yada yada code code code
[DirectMethod] // ext.net stuff
public void FireCustomerSelected()
{
if (CustomerSelected != null) // the CustomerSelected is always null
CustomerSelected(_CustomerId);
}
}
是它的ViewState或類似的東西,那我失蹤?爲什麼CustomerSelected始終爲空?
,似乎工作!大!謝謝=) – Ted 2011-05-13 12:58:35