blocks|key|1593255|text|更好的解决方案|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1593256|您可以在ItemCreated事件中检查项目类型：|1593257|protected+void+rptSummary_ItemCreated(Object+sender,+RepeaterItemEventArgs+e)+{
++++if+(e.Item.ItemType+==+ListItemType.Footer)+{
++++++++e.Item.FindControl(ctrl);
++++}
++++if+(e.Item.ItemType+==+ListItemType.Header)+{
++++++++e.Item.FindControl(ctrl);
++++}
}|code-block|syntax|javascript|1593258|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Better solution

You can check item type in ItemCreated event:

<pre><code>protected void rptSummary_ItemCreated(Object sender, RepeaterItemEventArgs e) {
 if (e.Item.ItemType == ListItemType.Footer) {
 e.Item.FindControl(ctrl);
 }
 if (e.Item.ItemType == ListItemType.Header) {
 e.Item.FindControl(ctrl);
 }
}
</code></pre>

blocks|key|1378048|text|您可以引用ItemCreated事件上的控件，然后在以后使用它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1378049|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You can take a reference on the control on the ItemCreated event, and then use it later.

blocks|key|1378150|text|在Repeater中查找控件(页眉、项目、页脚)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1378151|public+static+class+FindControlInRepeater
{
++++public+static+Control+FindControl(this+Repeater+repeater,+string+controlName)
++++{
++++++++for+(int+i+=+0;+i+<+repeater.Controls.Count;+i%2B%2B)
++++++++++++if+(repeater.Controls[i].Controls[0].FindControl(controlName)+!=+null)
++++++++++++++++return+repeater.Controls[i].Controls[0].FindControl(controlName);
++++++++return+null;
++++}
}|code-block|syntax|javascript|1378152|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Find control into Repeater (Header, Item, Footer)

<pre><code>public static class FindControlInRepeater
{
 public static Control FindControl(this Repeater repeater, string controlName)
 {
 for (int i = 0; i &lt; repeater.Controls.Count; i++)
 if (repeater.Controls[i].Controls[0].FindControl(controlName) != null)
 return repeater.Controls[i].Controls[0].FindControl(controlName);
 return null;
 }
}
</code></pre>

blocks|key|1593402|text|这是用VB.NET写的，如果你需要的话，可以翻译成C#：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1593403|<Extension()>
Public+Function+FindControlInRepeaterHeader(Of+T+As+Control)(obj+As+Repeater,+ControlName+As+String)+As+T
++++Dim+ctrl+As+T+=+TryCast((From+item+As+RepeaterItem+In+obj.Controls
+++++++++++++++++++Where+item.ItemType+=+ListItemType.Header).SingleOrDefault.FindControl(ControlName),T)
++++Return+ctrl
End+Function|code-block|syntax|javascript|1593404|并且使用起来很简单：|1593405|Dim+txt+as+string+=+rptrComentarios.FindControlInRepeaterHeader(Of+Label)("lblVerTodosComentarios").Text|1593406|尝试让它与页脚和项目控件一起工作=)|1593407|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

This is in VB.NET, just translate to C# if you need it:

<pre><code>&lt;Extension()&gt;
Public Function FindControlInRepeaterHeader(Of T As Control)(obj As Repeater, ControlName As String) As T
 Dim ctrl As T = TryCast((From item As RepeaterItem In obj.Controls
 Where item.ItemType = ListItemType.Header).SingleOrDefault.FindControl(ControlName),T)
 Return ctrl
End Function
</code></pre>

And use it easy:

<pre><code>Dim txt as string = rptrComentarios.FindControlInRepeaterHeader(Of Label)("lblVerTodosComentarios").Text
</code></pre>

Try to make it work with footer, and items controls too =)

blocks|key|1593445|text|最好、最干净的方法是在Item_Created事件中实现：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1593446|+protected+void+rptSummary_ItemCreated(Object+sender,+RepeaterItemEventArgs+e)
++++++++{
++++++++++++switch+(e.Item.ItemType)
++++++++++++{
++++++++++++++++case+ListItemType.AlternatingItem:
++++++++++++++++++++break;
++++++++++++++++case+ListItemType.EditItem:
++++++++++++++++++++break;
++++++++++++++++case+ListItemType.Footer:
++++++++++++++++++++e.Item.FindControl(ctrl);
++++++++++++++++++++break;
++++++++++++++++case+ListItemType.Header:
++++++++++++++++++++break;
++++++++++++++++case+ListItemType.Item:
++++++++++++++++++++break;
++++++++++++++++case+ListItemType.Pager:
++++++++++++++++++++break;
++++++++++++++++case+ListItemType.SelectedItem:
++++++++++++++++++++break;
++++++++++++++++case+ListItemType.Separator:
++++++++++++++++++++break;
++++++++++++++++default:
++++++++++++++++++++break;
++++++++++++}
++++}|code-block|syntax|javascript|1593447|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The best and clean way to do this is within the Item_Created Event : 

<pre><code> protected void rptSummary_ItemCreated(Object sender, RepeaterItemEventArgs e)
 {
 switch (e.Item.ItemType)
 {
 case ListItemType.AlternatingItem:
 break;
 case ListItemType.EditItem:
 break;
 case ListItemType.Footer:
 e.Item.FindControl(ctrl);
 break;
 case ListItemType.Header:
 break;
 case ListItemType.Item:
 break;
 case ListItemType.Pager:
 break;
 case ListItemType.SelectedItem:
 break;
 case ListItemType.Separator:
 break;
 default:
 break;
 }
 }
</code></pre>

blocks|key|1593486|text|private+T+GetHeaderControl<T>(Repeater+rp,+string+id)+where+T+:+Control
{
++++T+returnValue+=+null;
++++if+(rp+!=+null+&&+!String.IsNullOrWhiteSpace(id))
++++{
++++++++returnValue+=+rp.Controls.Cast<RepeaterItem>().Where(i+=>+i.ItemType+==+ListItemType.Header).Select(h+=>+h.FindControl(id)+as+T).Where(c+=>+c+!=+null).FirstOrDefault();
++++}
++++return+returnValue;
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1593487|查找并强制转换控件。(基于Piyey的VB答案)|unstyled|1593488|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>private T GetHeaderControl&lt;T&gt;(Repeater rp, string id) where T : Control
{
 T returnValue = null;
 if (rp != null &amp;&amp; !String.IsNullOrWhiteSpace(id))
 {
 returnValue = rp.Controls.Cast&lt;RepeaterItem&gt;().Where(i =&gt; i.ItemType == ListItemType.Header).Select(h =&gt; h.FindControl(id) as T).Where(c =&gt; c != null).FirstOrDefault();
 }
 return returnValue;
}
</code></pre>

Finds and casts the control. (Based on Piyey's VB answer)

blocks|key|1378308|text|对于ItemDataBound|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1378309|protected+void+Repeater1_ItemDataBound(object+sender,+RepeaterItemEventArgs+e)
{
++++if+(e.Item.ItemType+==+ListItemType.Header)//header
++++{
++++++++++++Control+ctrl+=+e.Item.FindControl("ctrlID");
++++}
++++else+if+(e.Item.ItemType+==+ListItemType.Footer)//footer
++++{
++++++++++++Control+ctrl+=+e.Item.FindControl("ctrlID");
++++}
}|code-block|syntax|javascript|1378310|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For ItemDataBound

<pre><code>protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
 if (e.Item.ItemType == ListItemType.Header)//header
 {
 Control ctrl = e.Item.FindControl("ctrlID");
 }
 else if (e.Item.ItemType == ListItemType.Footer)//footer
 {
 Control ctrl = e.Item.FindControl("ctrlID");
 }
}
</code></pre>

I was wondering how one would find the controls in the HeaderTemplate or FooterTemplate of an Asp.Net Repeater control.

I can access them on the ItemDataBound event, but I was wondering how to get them after (for example to retrieve a value of an input in the header/footer).

Note: I posted this question here after finding the answer just so that I remember it (and maybe other people might find this useful).

How to find controls in a repeater header or footer

我想知道如何在Asp.Net转发器控件的HeaderTemplate或FooterTemplate中找到控件。我可以在ItemDataBound事件中访问它们，但我想知道如何在之后获取它们(例如，检索页眉/页脚中的输入值)。注意:我在找到答案后在这里发布了这个问题，这样我就可以记住它(也许其他人会发现这个问题很有用)。

问如何在中继器页眉或页脚中查找控件
EN

回答 7

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在中继器页眉或页脚中查找控件EN

回答 7

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在中继器页眉或页脚中查找控件
EN