在我的主页面视图中,我有一个linkbutton,一个占位符,我注册了我的usercontrol:
<%@ Register TagPrefix="vf" TagName="Headline" Src="~/Controls/Headline.ascx" %>
<asp:LinkButton ID="lbAddHeadline" runat="server" OnClick="lbAddHeadline_OnClick">+ Headline</asp:LinkButton>
<asp:PlaceHolder ID="phAddTemplateControlsArea" runat="server"></asp:PlaceHolder>
如果出现这个链接按钮,我会根据我添加到页面的控件数给控件一个ID,我还设置了一个命令arg并链接了一个按钮点击事件,然后我将它们全部加载到一个面板。 当我单击usercontrol中的按钮时,我希望它在我的主页面上触发一个方法,RemoveItem_OnClick()
protected void lbAddHeadline_OnClick(object sender, EventArgs e)
{
Controls_Headline ctrl = (Controls_Headline)LoadControl("~/Controls/Headline.ascx");
ctrl.ID = "MyCtrl_" + CMSSession.Current.AddedTemplateControls.Count;
ctrl.Remove.CommandArgument = CMSSession.Current.AddedTemplateControls.Count.ToString();
ctrl.RemoveEvent += new EventHandler(RemoveItem_OnClick);
CMSSession.Current.AddedTemplateControls.Add((Control)ctrl);
LoadControlsToPanel();
}
private void LoadControlsToPanel()
{
PlaceHolder ph = accAddTemplates.FindControl("phAddTemplateControlsArea") as PlaceHolder;
foreach (var ctrl in CMSSession.Current.AddedTemplateControls)
{
ph.Controls.Add(ctrl);
}
}
public void RemoveItem_OnClick(object sender, EventArgs e)
{
LinkButton lb = sender as LinkButton;
}
当控件添加到主页面板上时,我已重写OnInit方法以保留usercontrol中的数据:
protected override void OnInit(EventArgs e)
{
PlaceHolder ph = accAddTemplates.FindControl("phAddTemplateControlsArea") as PlaceHolder;
int counter = 0;
foreach (UserControl ctrl in CMSSession.Current.AddedTemplateControls)
{
ctrl.ID = "MyCtrl_" + counter;
ITemplateControl ictrl = ctrl as ITemplateControl;
ictrl.Remove.CommandArgument = counter.ToString();
ictrl.RemoveEvent += new EventHandler(RemoveItem_OnClick);
counter++;
ph.Controls.Add(ctrl);
}
base.OnInit(e);
}
正如您所看到的,用户控件实现了它和其他用户控件将使用的通用接口,因此我可以链接一些常用按钮
public interface ITemplateControl
{
LinkButton Remove { get; set; }
TextBox Label { get; set; }
event EventHandler RemoveEvent;
}
这是usercontrol的html:
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Headline.ascx.cs" Inherits="Controls_Headline" %>
<div class="headline">
Headline Text:
<asp:TextBox ID="txtLabel" runat="server"></asp:TextBox>
<asp:LinkButton ID="lbRemove" runat="server" OnClick="lbRemove_OnClick">X</asp:LinkButton>
</div>
这是usercontrol的代码隐藏:
public partial class Controls_Headline : UserControl, ITemplateControl
{
protected void Page_Load(object sender, EventArgs e)
{
lbRemove.Click += new EventHandler(lbRemove_OnClick);
}
public TextBox Label
{
get { return txtLabel; }
set { txtLabel = value; }
}
public LinkButton Remove
{
get { return lbRemove; }
set { lbRemove = value; }
}
public event EventHandler RemoveEvent;
protected void lbRemove_OnClick(object sender, EventArgs e)
{
if (RemoveEvent != null)
{
RemoveEvent(sender, e);
}
}
}
现在,当我单击位于usercontrol中的lbRemove链接按钮时,我希望它调用它自己的方法lbRemove_OnClick,然后调用我在OnInit方法中绑定的委托事件。
每次单击lbRemove链接按钮时会发生什么事情它会调用主页面的OnInit方法,就是这样。
我错过了什么?
答案 0 :(得分:1)
想出来。
直接将UC中的click事件绑定到页面中的click事件。我太复杂了。
protected void lbAddHeadline_OnClick(object sender, EventArgs e)
{
Controls_Headline ctrl = (Controls_Headline)LoadControl("~/Controls/Headline.ascx");
ctrl.ID = "MyCtrl_" + CMSSession.Current.AddedTemplateControls.Count;
ctrl.Remove.CommandArgument = CMSSession.Current.AddedTemplateControls.Count.ToString();
ctrl.Remove.Click += new EventHandler(RemoveItem_OnClick);
CMSSession.Current.AddedTemplateControls.Add((Control)ctrl);
LoadControlsToPanel();
}
protected override void OnInit(EventArgs e)
{
PlaceHolder ph = accAddTemplates.FindControl("phAddTemplateControlsArea") as PlaceHolder;
int counter = 0;
foreach (UserControl ctrl in CMSSession.Current.AddedTemplateControls)
{
ctrl.ID = "MyCtrl_" + counter;
ITemplateControl ictrl = ctrl as ITemplateControl;
ictrl.Remove.CommandArgument = counter.ToString();
ictrl.Remove.Click += new EventHandler(RemoveItem_OnClick);
counter++;
ph.Controls.Add(ctrl);
}
base.OnInit(e);
}