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TextBox的值随dropdownlist值而变化
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转自：http://bytes.com/topic/asp-net/answers/443065-textbox-value-change-select-other-item-dropdownlist
You need to add the below javascript in ur html section of the page
<script language="javascript">
function ShowValue()
{
document.Form1["textboxname"].value =
document.Form1["dropdownvalue"].value
}
</script>
and in the codebehind file add this line
Dropdowncontrol.Attributes.Add("onchange","javascr ipt:ShowValue()");
Now when you change the value in the drop down, the Textbox will be
filled without refreshing the page
http://forums.asp.net/t/1796597.aspx?How+to+select+a+value+in+dropdownlist
<head runat="server">
<script type="text/javascript">
function sethref() { var Textb = document.getElementById('<%=TextBox1.ClientID%>');
var parLab = document.getElementById('<%=Dropdown1.ClientID%>').options[document.getElementById('<%=Dropdown1.ClientID%>').selectedIndex].text; if(parLab!='--select deptname--'){
Textb.value = parLab
} else{ Textb.value =''; } }
</script>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="reload" runat="server" onclick="reload_Click"/>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:DropDownList ID="Dropdown1" runat="server" onchange="sethref();">
<asp:ListItem>--select deptname--</asp:ListItem>
<asp:ListItem>mama</asp:ListItem>
<asp:ListItem>kaka</asp:ListItem>
<asp:ListItem>nana</asp:ListItem> </asp:DropDownList>
</div>
</form>
</body>
</html>
http://blog.csdn.net/lvincent_china/article/details/7209517
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript" src="../js/jquery-1.4.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$('#<%=DropDownList1.ClientID %>').bind("keyup change", function () {//use bind() to attach a handler to the keyup and change events:
$('#message').text("");
if ($(this).val() != "") {//Check if the selected value of the DropDownList is empty
$('#message').text("Text:" + $(this).find(":selected").text() + "value:" + $(this).val()); //Retrieve the Text/Value pair and display in the div area 'message':
}
else {
$('#message').text("");
}
})
})
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem Value="" Text="please select"></asp:ListItem>
<asp:ListItem Value="" Text="Standard"></asp:ListItem>
<asp:ListItem Value="" Text="Silver"></asp:ListItem>
<asp:ListItem Value="" Text="Gold"></asp:ListItem>
<asp:ListItem Value="" Text="Premier"></asp:ListItem>
</asp:DropDownList>
</div>
<div id="message"></div>
</form>
</body>
</html>
