Reapeter内嵌的Reapeter控件中，FindControl找不到控件？

[fisher99]

如题，在内层的Reapeter控件中包含有Label服务器控件，但是在内嵌的Reapeter的ItemDataBound事件中 却报错：
Label lblAp=(Label)e.Item.FindControl("lblAvPrice2");
lblAp.Text="待定2"; ←这句出错，信息是“异常详细信息: System.NullReferenceException: 未将对象引用设置到对象的实例”

[silentwins]

Is there any header or footer in your inline repeater?

[mengjun5200]

你必须在外面的Reapeter中找里面的Reapeter，再从里面的Reapeter找label

[fisher99]

代码片段如下：三个方法都不行
private void rptLoupan_ItemDataBound(object sender, System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
if(e.Item.ItemType==ListItemType.Item||e.Item.ItemType==ListItemType.AlternatingItem)
{
float avPrice=(float)Convert.ToDouble(DataBinder.Eval(e.Item.DataItem,"loupan_avpice"));
if(avPrice==0)
{
Label lblAp=(Label)e.Item.Parent.Parent.FindControl("rptLoupan").FindControl("lblAvPrice"); ←方法1 试验：找不到
Label lblAp=(Label)e.Item.Parent.FindControl("rptLoupan").FindControl("lblAvPrice"); ←方法2 试验：找不到
lblAp=(Label)this.rptMonthList.FindControl("rptLoupan").FindControl("lblAvPrice"); ←方法3 试验：找不到
lblAp.Text="待定";
}
else
{
Label lblAp=(Label)e.Item.FindControl("lblAvPrice2");
lblAp.Text="待定2";
}
}
}

[chinaicm]

刚刚做了一个测试
用Control c = e.Item.FindControl("Label1");
这样就可以找到.

[fisher99]

[Quote=引用 4 楼 chinaicm 的回复:]
刚刚做了一个测试
用Control c = e.Item.FindControl("Label1");
这样就可以找到.
[/Quote]


我接着试了，这样
Control c=e.Item.FindControl("lblAvPrice");
Label lblAp=(Label)c;
lblAp.Text="待定";
还是不行啊

要是只写Control c=e.Item.FindControl("lblAvPrice");这句或是Label lblAp=(Label)e.Item.FindControl("lblAvPrice");这句是不会报错的，但是一给Text属性赋值“待定”就报错

[silentwins]

I'm sure that it's no need to find the control from its parent node.
Set a breakpoint at this sentense, check what lblAp is and what properties it has.

[fisher99]

[Quote=引用 6 楼 silentwins 的回复:]
I'm sure that it's no need to find the control from its parent node.
Set a breakpoint at this sentense, check what lblAp is and what properties it has.
[/Quote]

设置断点跟进去，到语句【lblAp.Text="待定";】这句停住，提示【错误：标识符"lblAp"超出范围】

[fisher99]

问题解决了，谢谢大家。

原因出自这个事件绑定：
private void rptMonthList_ItemCreated(object sender, System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
Repeater rptLouP=new Repeater();
if(e.Item.ItemType==ListItemType.Item)
{
rptLouP=(Repeater)e.Item.FindControl("rptLoupan");
rptLouP.ItemDataBound+=new RepeaterItemEventHandler(rptLoupan_ItemDataBound);
}
else if(e.Item.ItemType==ListItemType.AlternatingItem)
{
rptLouP=(Repeater)e.Item.FindControl("rptLoupan2");
rptLouP.ItemDataBound+=new RepeaterItemEventHandler(rptLoupan2_ItemDataBound);
}
}

一开始我把【rptLouP.ItemDataBound+=new RepeaterItemEventHandler(rptLoupan2_ItemDataBound);
】这句放在了if else的外面，导致绑定事件到了非item行上