触发问题,更新面板不起作用?
我创建动态 LinkButton 并将 LinkButton 的单击触发器添加到 UpdatePanel。
现在,当我第一次单击任何一个链接按钮时,触发器运行良好,并显示我的选择,没有回发。之后,我单击其他 LinkButton 所有页面加载并运行 POSTBACK,因此触发器不起作用! 问题是什么 ?请帮忙!
protected void Page_Load(object sender, EventArgs e)
{
ShowAllCar();
}
public void ShowAllCar()
{
dsAraclarTableAdapters.tblAraclarTableAdapter _t=new dsAraclarTableAdapters.tblAraclarTableAdapter();
dsAraclar.tblAraclarDataTable _m =_t.GetData();
int i=0;
UpdatePanel1.Triggers.Clear();
pnlAraclar.Controls.Clear();
foreach (DataRow _row in _m.Rows)
{
LinkButton _linkbutton =new LinkButton();
i++;
_linkbutton.ID ="Option" + i.ToString();
_linkbutton.Text = "<img src='" + _row["Resim"].ToString() + "' border='0'/> <b>" + _row["Marka"].ToString() + " " + _row["Model"].ToString() + "</b><br/>" + _row["Ozellikler"].ToString() + " : " + _row["KisFiyat"].ToString() + ":" + _row["YazFiyat"].ToString();
_linkbutton.CssClass="ContextMenuItem";
_linkbutton.PostBackUrl = "";
_linkbutton.Click +=new EventHandler(OnCarSelect);
pnlAraclar.Controls.Add(_linkbutton);
AsyncPostBackTrigger _trigger = new AsyncPostBackTrigger();
_trigger.ControlID = _linkbutton.ID;
_trigger.EventName = "Click";
UpdatePanel1.Triggers.Add(_trigger);
}
}
protected void OnCarSelect(object sender, EventArgs e)
{
lblSelection.Text = "You selected <b>" + ((LinkButton)sender).Text + "</b>.";
}
I create dynamic LinkButton and I add LinkButton's Click Trigger to UpdatePanel.
Now, When I first click to any one of link button trigger is runing good and show my select whitout POSTBACK. After That, I click other LinkButton All Page Loading and POSTBACK running so Trigger Does Not Work!
What is the problem ? Please Help!
protected void Page_Load(object sender, EventArgs e)
{
ShowAllCar();
}
public void ShowAllCar()
{
dsAraclarTableAdapters.tblAraclarTableAdapter _t=new dsAraclarTableAdapters.tblAraclarTableAdapter();
dsAraclar.tblAraclarDataTable _m =_t.GetData();
int i=0;
UpdatePanel1.Triggers.Clear();
pnlAraclar.Controls.Clear();
foreach (DataRow _row in _m.Rows)
{
LinkButton _linkbutton =new LinkButton();
i++;
_linkbutton.ID ="Option" + i.ToString();
_linkbutton.Text = "<img src='" + _row["Resim"].ToString() + "' border='0'/> <b>" + _row["Marka"].ToString() + " " + _row["Model"].ToString() + "</b><br/>" + _row["Ozellikler"].ToString() + " : " + _row["KisFiyat"].ToString() + ":" + _row["YazFiyat"].ToString();
_linkbutton.CssClass="ContextMenuItem";
_linkbutton.PostBackUrl = "";
_linkbutton.Click +=new EventHandler(OnCarSelect);
pnlAraclar.Controls.Add(_linkbutton);
AsyncPostBackTrigger _trigger = new AsyncPostBackTrigger();
_trigger.ControlID = _linkbutton.ID;
_trigger.EventName = "Click";
UpdatePanel1.Triggers.Add(_trigger);
}
}
protected void OnCarSelect(object sender, EventArgs e)
{
lblSelection.Text = "You selected <b>" + ((LinkButton)sender).Text + "</b>.";
}
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您需要在页面生命周期的早期将控件添加回控件树:
ASP.NET 页面生命周期概述
You need to add the controls back to the control tree earlier in the page life cycle:
ASP.NET Page Life Cycle Overview