TextBox KeyDown事件 [英] TextBox KeyDown event
本文介绍了TextBox KeyDown事件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在使用asp文本框创建一个用户控件。要添加KeyDown和KeyUp事件，我使用下面的代码。当用户在文本框中键入一些文本时，列表框将被过滤并显示列表。它的工作完美。但如果我在我的页面中使用的不仅仅是用户控件，当我输入一个控件时，所有控件列表框都会显示。我该如何防止这种情况？
I am creating an user control with asp textbox .To add the KeyDown And KeyUp Event I am using the below code.When User typing some text in the text box the listbox is filtered and show the list. Its working Perfect .But if I am using more than user controls in my page,when i type in one control all controls list boxes are showing. How can i prevent this?
<asp:TextBox ID="txtBox" runat="server" onkeydown="onTxtKeyDown();" onkeyup="onTxtKeyUp();" >
<asp:Button runat="server" ID="btnSearch" Style="display: none" OnClick="HandleAjaxCall"/>
<asp:Label runat="server" ID="lblStatus" />
protected void HandleAjaxCall(object sender, EventArgs e)
{
BindDataToListView(txtBox.Text);
}
<script type="text/javascript">
var to; // variable to which we assign setTimeout function
var prm = Sys.WebForms.PageRequestManager.getInstance(); // Page Request Manager object
function onTxtKeyUp() {
to = setTimeout('performSearch();', 300);
}
function onTxtKeyDown() {
if (to) clearTimeout(to);
}
function performSearch() {
if (prm.get_isInAsyncPostBack) {
prm.abortPostBack();
}
$get("<%=lblStatus.ClientID %>").innerHTML = "Loading...";
__doPostBack("<%=btnSearch.UniqueID %>", "");
}
</script>
推荐答案
get（ <％= lblStatus.ClientID％>）。innerHTML = 正在加载......;
__doPostBack（ <％= btnSearch.UniqueID％>， ）;
}
< / 脚本 >
get("<%=lblStatus.ClientID %>").innerHTML = "Loading..."; __doPostBack("<%=btnSearch.UniqueID %>", ""); } </script>
onKeyUp javascript事件有什么问题？
What is wrong with the onKeyUp javascript event?
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function KeyReleased() {
// Do what you want
// Example:
var a = document.getElementById("TextBox1").value;
document.getElementById("divResult").innerHTML = a;
return true;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" onKeyUp="KeyReleased()" runat="server"></asp:TextBox>
<div id="divResult"></div>
</div>
</form>
</body>
</html>
这篇关于TextBox KeyDown事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
