Why is the asp.net checkbox not disabled?
Question
I am trying to set the disabled property for my CheckBox to true. However, when I do a postback the CheckBox is still enabled?
HTML:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
<head runat="server">
<title></title>
<script>
$(document).ready(
function () {
$("#CheckBoxList1_0").attr('disabled',true);
}
);
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:CheckBoxList ID="CheckBoxList1" runat="server">
<asp:ListItem>een</asp:ListItem>
<asp:ListItem>twee</asp:ListItem>
<asp:ListItem>drie</asp:ListItem>
</asp:CheckBoxList>
</div>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</form>
</body>
</html>
c#:
protected void Button1_Click(object sender, EventArgs e)
{
if (!CheckBoxList1.Items[0].Enabled)
{
Response.Write("it is disabled");
}
}
2 answers
solution1
2 ACCPTED 2011-12-23 01:56:03
CSS properties like disabled added with jQuery, or added in any way for that matter, will not post to the server when you do a postback.
If you really need to keep track of which checkboxes are disabled, one way to accomplish this would be to store those elements' ids into a hidden input, the value of which will post to the server.
Something like this should work
<input type="hidden" runat="server" id="yourHiddenInput" />
$("form").submit(function(){
var allIds = [];
$("input[type='checkbox']:disabled").each(function() {
allIds.push($(this).attr("id"));
});
$("#yourHiddenInput").val(allIds.join());
//form is about to post. When it does,
//you'll be able to read the ids via yourHiddenInput.Value
});
solution2
1 2011-12-23 01:56:58
当您使用javascript更改复选框时，该更改仅在客户端上进行，我认为该复选框的viewstate信息不会更新，因此，当回传发生时，只要页面知道该复选框仍未选中
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