blocks|key|1295217|text|您应该使用document.getElementById()在javascript中选择控件|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1295218|+document.getElementById('"%2BControlName%2B"').focus();|code-block|syntax|javascript|1295219|类似于：|1295220|Protected+Sub+Set_Focus(ByVal+ControlName+As+String)
++++Dim+strScript+As+String

++++strScript+=+"<script+language=javascript>+window.setTimeout(document.getElementById('"+%2B+ControlName+%2B+"').focus();"",0);+</script>"
++++RegisterStartupScript("focus",+strScript)
End+Sub|1295221|编辑:我不能完全确定正确的VB语法来转义ControlName周围的引号。|1295222|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en/DOM/document.getElementByID^0|5|P|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|12|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

You should select the control in javascript with <a href="https://developer.mozilla.org/en/DOM/document.getElementByID" rel="nofollow">document.getElementById(id)</a>:

<pre><code> document.getElementById('"+ControlName+"').focus();
</code></pre>

something like: 

<pre><code>Protected Sub Set_Focus(ByVal ControlName As String)
 Dim strScript As String

 strScript = "&lt;script language=javascript&gt; window.setTimeout(document.getElementById('" + ControlName + "').focus();"",0); &lt;/script&gt;"
 RegisterStartupScript("focus", strScript)
End Sub
</code></pre>

Edit: I'm not entirely sure of the correct VB-syntax for escaping the quotes around ControlName.

blocks|key|4962526|text|你需要在javascript中使用document.getElementById，然后才能对它调用focus。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4962527|尝试如下所示：|4962528|elem+=+document.getElementById('theCorrectId');
elem.focus();|code-block|syntax|javascript|4962529|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en/DOM/document.getElementByID^0|H|N|1D|5|H|N|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|6|7|12|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|13|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

You need to use <a href="https://developer.mozilla.org/en/DOM/document.getElementByID" rel="nofollow"><code>document.getElementById</code></a> in javascript before you can call <code>focus</code> on it.

Try something like:

<pre><code>elem = document.getElementById('theCorrectId');
elem.focus();
</code></pre>

blocks|key|4962570|text|还有一个服务器端Control.Focus方法，它将自动呈现适当的JavaScript，以便将焦点放在该控件上。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4962571|编辑|BOLD|4962572|下面是一个示例：|4962573|Protected+Sub+MyDropDownList_SelectedIndexChanged(...)
++++MyTextBox.Focus()
End+Sub|code-block|syntax|javascript|4962574|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.web.ui.control.focus.aspx^0|8|D|8|D|0|0|0|2|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@$9|10|A|11|1|12]]|E|$]]|$1|F|3|G|5|6|7|13|8|@$9|14|A|15|B|H]]|D|@]|E|$]]|$1|I|3|J|5|6|7|16|8|@]|D|@]|E|$]]|$1|K|3|L|5|M|7|17|8|@]|D|@]|E|$N|O]]|$1|P|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|Q|$R|$5|S|T|U|E|$V|W]]]]

There is also a server-side <a href="http://msdn.microsoft.com/en-us/library/system.web.ui.control.focus.aspx" rel="nofollow"><code>Control.Focus</code></a> method that will render the appropriate JavaScript automatically to put the focus on that control.

Edit

Here is an example:

<pre><code>Protected Sub MyDropDownList_SelectedIndexChanged(...)
 MyTextBox.Focus()
End Sub
</code></pre>

blocks|key|4962578|text|Protected+Sub+ddlformtype_SelectedIndexChanged(ByVal+sender+As+System.Object,+ByVal+e+As+System.EventArgs)+
++++Set_Focus(dtbEffectiveDate.ClientID)
End+Sub

Protected+Sub+Set_Focus(ByVal+ControlName+As+String)
++++Dim+strScript+As+String

++++strScript+=+"<script+language=javascript>+var+x+=+document.getElementById('"+%2B+ControlName+%2B+"');++window.setTimeout(""x.focus()"",0);+</script>"
++++RegisterStartupScript("focus",+strScript)
End+Sub|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4962579|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>Protected Sub ddlformtype_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) 
 Set_Focus(dtbEffectiveDate.ClientID)
End Sub

Protected Sub Set_Focus(ByVal ControlName As String)
 Dim strScript As String

 strScript = "&lt;script language=javascript&gt; var x = document.getElementById('" + ControlName + "'); window.setTimeout(""x.focus()"",0); &lt;/script&gt;"
 RegisterStartupScript("focus", strScript)
End Sub
</code></pre>

I need to focus on a textbox after an item has been selected from a dropdownlist.

I've tried control.focus() and setfocus().

The last thing I've tried was Set_Focus(dtbEffectiveDate.ClientID) inside the SelectedIndexChanged method with the folowing method.

<pre><code>Protected Sub Set_Focus(ByVal ControlName As String)
 Dim strScript As String

 strScript = "&lt;script language=javascript&gt; window.setTimeout(""" + ControlName + ".focus();"",0); &lt;/script&gt;"
 RegisterStartupScript("focus", strScript)
End Sub
</code></pre>

I'm out of answers so any help would be awesome.

control.focus() after selectedIndexChanged

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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从下拉列表中选择一个项目后，我需要将焦点放在文本框上。我尝试过control.focus()和setfocus()。我尝试的最后一件事是Set_Focus(dtbEffectiveDate.ClientID)，它在SelectedIndexChanged方法中使用了folowing方法。Protected Sub Se...

问selectedIndexChanged之后的control.focus()
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