我有一個C#,ASP.NET網站,我有一個JavaScript腳本里面,我希望發送一個變種從它裏面到我的代碼功能, 我試圖用一個隱藏字段來做到這一點,這裏是它的外觀:試圖發送值使用隱藏字段從Javascript到C#
<asp:HiddenField ID="chatMessage" runat="server" />
<!--Script references. -->
<!--Reference the jQuery library. -->
<script src="Scripts/jquery-1.6.4.min.js" "></script>
<!--Reference the SignalR library. -->
<script src="/Scripts/jquery.signalR-2.0.0.js"></script>
<!--Reference the autogenerated SignalR hub script. -->
<script src="/signalr/hubs"></script>
<!--Add script to update the page and send messages.-->
<script type="text/javascript">
$(function() {
// Declare a proxy to reference the hub.
var chat = $.connection.chatHub;
// Create a function that the hub can call to broadcast messages.
chat.client.broadcastMessage = function (name, message) {
// Html encode display name and message.
var encodedName = $('<div />').text(name).html();
var encodedMsg = $('<div /> ').text(message).html();
var tremp_id = $('<div /> ').text("<%=Request.QueryString["trempid"]%>").html();
var chatMessage = document.getElementById('chatMessage');
chatMessage.value = 'value from javascript';
// Add the message to the page.
$('#discussion').append('<li class="<%=returnLiClass(chatMessage.Value)%><strong>' + encodedName
+ '</strong>: ' + encodedMsg + "Tremp:" + tremp_id + '</li>');
};
// Get the user name and store it to prepend to messages.
$('#displayname').val('<%=returnName()%>');
// Set initial focus to message input box.
$('#message').focus();
// Start the connection.
$.connection.hub.start().done(function() {
$('#sendmessage').click(function() {
// Call the Send method on the hub.
chat.server.send($('#displayname').val(), $('#message').val());
// Clear text box and reset focus for next comment.
$('#message').val('').focus();
});
});
});
</script>
正如你可以看到我發送chatMessage.Value
我returnLiClass()
功能。 當我調試我看到它得到一個空字符串(「」)。
我在做什麼錯了?謝謝!
您可以發佈您的HTML和服務器端的樞紐? –
var chatMessage = document.getElementById('chatMessage')不會返回任何內容,因爲服務器控件的ID不是他的ID。而不是chatMessage你需要<%= chatMessage.ClientID%> – loli