I have an ASP.NET page with 2 ASP.NET text boxes and one ASP.NET drop downlist I want toi use jQuery form posting instead of normal ASP.NET post back.Can anyone guide me how to do this ? How can i access the server side controls in the action page ? I dont want to pass everything via query string. Kindly guide me how to go ahead ? Thanks in advance
you can use simple jQuery selectors to select Server Side Controls suppose you have following textbox on your page:
<asp:TextBox id="userName" runat="server" />
in jQuery you can access it like this:
var valueOfTextBox = $("input[id$='userName']").val();
//OR
var valueOfTextBox = $("input[id$='userName']").attr("value");
if you have few controls on page then this technique is okay but for large forms please use this instead:
var valueOfTextBox = $("#<%= userName.ClientID %>").val();
//OR
var valueOfTextBox = $("#<%= userName.ClientID %>").attr("value");
There is huge performance gain, as explained by Dave here.
You can find more about jQuery selector syntax here.
If you want to post form via jquery AJAX then use this code:
$("#form1").submit(function(){//Where form1 is your form's id
var a=$("input[id$='userName']").val();
var b=$("input[id$='userId']").val();
$.ajax({
type: "POST",
url: "yourPage.aspx",
data: "name=" + a+"&id=" + b,
success: function(msg){
alert( "Data Saved: " + msg );
}
});
});
More details about jQuery AJAX are here.
You can also use jquery.form plugin to automate the things.
Related
Hey all, having an issue getting asp buttons to interact with JQuery. I'm basically trying to hide a div that contains a form and replace it with an processing image. It works fine for me when I use an HTML input button as the trigger but when I use an aspButton nothing happens.
This works (the id of the HTML button is 'btnSubmit'):
<script>
$('#btnSubmit').click(function () {
$('#form1').fadeOut('fast', function () {
$('#processing').fadeIn('fast', function () {
});
});
});
</script>
This doesn't (the id of the ASP button is 'btnSubmitASP'):
<script>
$('#btnSubmitASP').click(function () {
$('#form1').fadeOut('fast', function () {
$('#processing').fadeIn('fast', function () {
});
});
});
</script>
Any idea what the trick is to get the asp button to do this?
Thanks
The ASP.net server ID for the control is different from the html ID. (ASP.net calls this the client ID). You can get the client id this way:
$('#<%= this.btnSubmitASP.ClientID %>').click( /* etc */ );
If you are using asp.net 4.0 you can set the button's ClientIDMode property ='Static'. This will stop the runtime from mucking with the ID.
Try this:
<script>
$('<%=btnSubmitASP.ClientID%>').click(function () {
$('#form1').fadeOut('fast', function () {
$('#processing').fadeIn('fast', function () {
});
});
});
</script>
Explanation:
ASP.NET renames all of its controls when they get sent to the client. Consequently, your ASP.NET Button does not have a client ID of "btnSubmitASP" client-side. The above code calls the server control on the server side and gets its client-id to use in the jQuery code.
Alternatively, you can use jQuery selectors:
<script>
$("[id$='_btnSubmitASP']").click(function () {
$('#form1').fadeOut('fast', function () {
$('#processing').fadeIn('fast', function () {
});
});
});
</script>
This will look for controls whose client ID ends with "_btnSubmitASP".
Another alternative to using the ClientId is to assign a unique class to the ASP:button. Your selector would then look like this:
<asp:button runat="server" CssClass="submitbutton">/<asp:button>
<script>
$("submitbutton").click(function () {
$('#form1').fadeOut('fast', function () {
$('#processing').fadeIn('fast', function () {
});
});
});
</script>
For ASP.NET buttons you should use the OnClientClick property as it has built in client side scripting added to the button to do its post back behavior. Example:
<asp:Button ID="btnSubmitASP" runat="server"
OnClientClick="yourJqueryFunction();" />
If you return false in the OnClientClick you will prevent the default behavior of the button preventing a PostBack. Doing nothing or returning true will cause the PostBack to occur. By using this method you don't need to know the name of your Button to attach the script code.
To just get your code working though, you need to get the ClientID of the control inline to creating you script so change the following line to use the ClientID property of the Button:
$('#<%= btnSubmitASP.ClientID %>').click(function () {
You need to get the ClientID because ASP.NET adds to name to namespace it and prevent duplication of names. If you look at the ASP.NET Button, the you will notice the name and ID properties have a lot more added to it like:
<input type="submit" name="ctl00$ContentPlaceHolder1$btnSubmitASP" value="Test"
id="ctl00_ContentPlaceHolder1_btnSubmitASP" />
My knowledge of jQuery is very shallow, but I can give you one tip: Remember that jQuery is being executed client-side, while the ASP button is rendered on the server and returned in the response.
Double-check the HTML markup for the button when your page is returned from the server, and make sure it's structured as you expect. Perhaps the ID attribute isn't being set as expected, for example.
Your button controller is runat="server" so this means that .NET will modify the controller's id before rendering it in HTML.
jQuery tries to use that ID to do whatever you want to do with it. But the ID is no longer the same.
Use a class instead on your button. I know it's not as fast as an ID, but it's the best way to do it because .NET will not modify your css class.
If your ASP:Button contains runat="server" then .NET will modify the ID value before it get to the DOM, so your resulting <input> will probably wind up looking like
<input id="ctl00_ContentPlaceHolder1_btnSubmitASP" />
Therefore, your jQuery selector $('#btnSubmitASP') is no longer valid because the ID has changed.
Use Firebug or Right click -> View source to confirm the actual ID value.
I wanted to write javascript code on "OnClientClick" of the asp.net button and also I want the asp.net validation to be run for that button. but when i mix these both validation is not working. please help me out. Below is my code
ASPX
<asp:Button ID="btnAddToFeatureOffers" runat="server" Text="Add to Feature Offers"
OnClick="btnAddToFeatureOffers_Click" ValidationGroup="vgAddOffer" OnClientClick="add();" />
javascript
function add() {
var selectedOrder = $('#ctl00_MainContent_ddlFeaturedHostingType option:selected')[0].index;
var offer = $('#<%=txtOrder.ClientID%>').val();
var a = $("<a>").attr("href", "#").addClass("offer").text("X");
$("<div>").text(offer).append(a).appendTo($('#resultTable #resultRow td')[selectedOrder - 1]);
}
Try giving a return false or return true inside the function add based on your validation result.
Also no need to write selector like this
$('#resultTable #resultRow td')
Simply write
$('#resultRow td')
I have web page in ASP.NET. I have created Tree View control with jQuery. I drag items from the tree and drop into the div element.
<div id="rows" runat="server" class="droppable">
</div>
I add items to that div using .append function from jQuery.
$(".droppable").append(event.originalTarget.innerHTML);
It works like I want. But now I want to get all dropped items from ASP.NET code. I use following code:
protected void Button2_Click(object sender, EventArgs e)
{
HtmlGenericControl control = (HtmlGenericControl)Page.FindControl("rows");
Label1.Text = control.InnerHtml;
}
But it doesn't work. I've also tried InnerText function, but still nothing. I've also put the button and label controls into UpdatePanel so the page doesn't refresh and my dropped item are still in div element.
How can I get dynamically added items from ASP.NET code.
Lukas
Your append() call simply changes the DOM structure. ASP.NET has no idea you did this.
You need to store your changes into a hidden "state" field on the page, and in your code-behind pluck them out.
var droppedItem = event.originalTarget;
$(".droppable").append(droppedItem.innerHTML);
$("#myHiddenStateField").get(0).value += "," + droppedItem.id;
Code behind:
string[] droppedItemIds = myHiddenStateField.Value.Split(",");
ASP.NET will only be able to work with form elements.
So if these rows are for example (input[type=text]) you can do this:
Request.Form["rows"]
EDIT
When the user drags over the element why don't you create a new hidden input and put the relevant value inside of it. This will make it easy to grab the value from the server with the example I used above.
better yet why not use jquery's ajax on droppable's success event and record each drop via asp.net's PageMethod, then you don't have to deal with parsing html inside your droppable element.
this should get you started
http://encosia.com/2008/05/29/using-jquery-to-directly-call-aspnet-ajax-page-methods/
here is an actual example i used
$('.droppable').droppable({
accept: '#dragList > li, .columnRight li',
activeClass: 'ui-state-highlight',
hoverClass: 'hoverBorder',
drop: function(ev, ui) {
$.ajax({
type: "POST",
url: "yourPage.aspx/AddDroppable",
data: "{'id':'" + ui.draggable.context.id + "'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
$("#Result").html(msg.d);
}
});
}
});
I am very new to jQuery and have got a quick question.
I wish to use my server side classes in my jQuery code, something similar to this:
$(document).ready(function() {
var temp = <%# myClass.Id %>;
})
Is this possible? if so, how?
Thank you very much
This is the later question I refined my former question to:
I'm sorry, I think I didn't explain myself too well... I've got a class name User. It's a class I built in my business logic.
I've got a web page named UserProfile, inside it I've got the following property exposing the current logged in user:
public BL.User CurrUser { get { return (BL.User)Session["currUser"]; } }I want to be able to access this User class from my aspx page using Jquery. How do I do that?
The databinding syntax
<%# MyStaticClass.MyProperty %>
will only work if you call DataBind on the container (page). What you're after is most likely the following syntax:
<%= MyStaticClass.MyProperty %>
which will also give you access to you page / control members
<%= this.MyPageProperty %>
As was already mentioned you should really assign those values to java script variables and pass those variables to you JS functions.
This will only work if your javascript is embedded in your source files (e.g. the .aspx files):
<script type="text/javascript">
var id = <%# myClass.Id %>; // store as raw value
var id_string = '<%# myClass.Id %>'; // store in a string
</script>
As others have said, if the JavaScript is in your aspx page, then using server tags will work fine.
If you have your jQuery in an external script file, then you could put this in your aspx page
<script type="text/javascript">
var myClass = $('#<%= myClass.ClientID %>');
</script>
and then use the variable in your external script file
$(function() {
myClass.click( function() { ... });
});
For other options take a look at this question and answer - How to stop ASP.NET from changing ids in order to use jQuery
Is it possible to pass the contents of a textbox or Listbox into the URL portion of the javascript code window.open(URL)? I have an asp.net listbox control that displays URL values. When ever an end user clicks on another listbox, the URL listbox provides the specific URL. I am trying to pass this URL into the above javascript code, but I do not know the correct syntax to do this. This code will execute as an onclick event.
For clarification, similar to typing “+ ListBox.Text.ToString() +” or ‘” & List.Text & “’” to add the content of a listbox into something else, such as a textbox. Is there specific syntax to do the same, but add the listbox.text into javascript?
Thank you,
DFM
Simply add a client-side onclick handler to your listbox as shown below:
<asp:ListBox id="ListBox1" runat="server" .....
onclick="openPopup(this)">
........
</asp:ListBox>
Then add the following javascript code:
<script type="text/javascript">
function openPopup(e){
window.open(e.value);
}
</script>
Sure, this should be pretty easy with jQuery. Obviously the URL generation could be reduced to a single statement, but should give you the general idea.
$(document).ready(function() {
$("your-element").click(function() {
var str = $("#listbox-id").val();
var url = "your-url.com/" + str;
window.open(url);
});
});