I have a customize Read function for kendo grid ....
public virtual async Task<ActionResult> Read([DataSourceRequest] DataSourceRequest request,
RecordStatus? recoredStatus){ // code here }
now I want refresh my grid by using record status in kendo with jquery
<script type="text/javascript">
function viewButtonClickHandler(e) {
alert(e.Id)
$('#Grid').data('kendoGrid').dataSource.read(e.Id);
$('#Grid').data('kendoGrid').refresh();
}
but how I send this additional parameter ( recordStatus )in read function !? can I do this !?
So if you are using Kendo MVC UI you can use the Data property for the Read method of DataSource . So the client side method DataHandlerName will execute while you are requesting for the read action, by using-
$('#Grid').data('kendoGrid').dataSource.read();
You can easily handle the client side script. Your Server Side code will be following for Kendo GRID,
.DataSource(dataSource => dataSource.Ajax().ServerOperation(false).Read(r=> r.Action("ActionName","ControllerName").Type(HttpVerbs.Post).Data("DataHandlerName")))
And your client side code will be-
<script>
function DataHandlerName() {
//your code will goes here
var request={
id:1
};
return request ;
}
</script>
And Your Action Mehtod will be,
public ActionResult ActionName([DataSourceRequest] DataSourceRequest request,int id){}
If I understood correctly you just need this. And also please take a look to the link. It may can helps you.
function onSomeButtonClick(){
grid_.dataSource.read({q:"test"});
}
http://www.telerik.com/forums/how-to-refresh-a-grid-with-parameters-dc0f416ce08a
Using Purely java script this is how you can send params to read method
$('#grid').data('kendoGrid').dataSource.Read({id:e.Id});
$('#Grid').data('kendoGrid').refresh();
On Server Side you need this.
public ActionResult Products_Read([DataSourceRequest] DataSourceRequest request,int id){}
If you are using MVC based grid telerik forum already has example on how to do use read to send extra parameters .
http://www.telerik.com/forums/pass-additional-parameters-to-read-ajax-datasource-method---mvc
I have created Class under App_Code folder there i have created method.
I need to call that class method using JavaScript from Sample.aspx file.
Class:
namespace ContactBook.App_Code
{
//The function need to call...
public class ContactBook_functionalities
{
public static bool MyFunction(string email, string contact)
{
//Code...
}
}
}
JavaScript:
<script type="text/javascript">
function callMyFunc(email, contact)
{
//var x = MyFunction(string email, string contact);
}
</script>
[WebMethod] is not working for Class functions.
I don't thing you can do that because:
ASPX is server side, whereas JavaScript is client side
some components from a ASP site are compiled
What you can do is expose a route (if you were using MVC desing pattern) on the server that calls that function (or an Api for that mather).
You need to expose an HTTP handler in ASP.net or Controllers / Web API in MVC for your JavaScript to have the capability of talking to the server. Simple classes are not accessible outside ASP.net Application via JavaScript.
After creating your own controller/HTTP handler, you need to send an AJAX request to the controller and it should look like this code below:
$.ajax({
url: "sampleurlhere",
type: "POST"//POST or GET,
data: {
id: "sample id as parameter"
},
success: function(e) {
//this event fires up when response arrives.
}
})
I have an ASP.NET application in VB.NET. I have a Javascript function in mypage.aspx and another one in my callback.aspx page. I need this scripts to render and submit an IFrame on mypage.aspx.
When I click on the submit button:
<asp:Button ID="subbtn" Name="Submit" OnClientClick="onsubmit_action();" runat="server" />
this script is executed, where iframeId is the id of the IFrame:
function onsubmit_action() {
submitPage('iframeId');
}
The response of the IFrame (validation or success) is submitted to the callback.aspx file. I guess this happens through cross-site scripting that calls the callback function in the callback.aspx file;
function callback()
{
parent.pagecallback_success('<%=Request.QueryString("Id")%>');
}
that calls the function in mypage.aspx
function pagecallback_success(ref_id) {
var Url = "mypage.aspx?";
Url += "id=" + id;
window.location.href = Url;
}
The script works as expected. Now, I would like to call a server function
Protected Function Store(ByVal id As String) As Boolean
in mypage.aspx.vb and pass the variable id:
function hostedpagecallback_success(id) {
var Url = "mypage.aspx?";
Url += "id=" + id;
window.location.href = Url;
"<%= Store(id) %>"
}
The problem is that the compiler considers id as a server side function and gives a compile error. However if I use a sub (without parameters) instead of a function, the sub is executed 3 times, on page_load, when the IFrame is received and another time (connection is https cannot debug Javascript efficiently).
I am not good in cross-site scripting and code nuggets, probably it is really trivial but I do not know how to solve this problem. Anybody?
I think you are looking for page methods a feature of MS-Ajax. Put the [WebMethod]
on the method you want to call (server side) and call it client side with something like PageMethods.GetData(f, s, OnRequestComplete, OnRequestError);
The whole pattern takes an article to describe.
http://www.dotnetfunda.com/articles/article454-using-pagemethods-and-json-in-aspnet-ajax.aspx
i'm trying to follow the suggestion here: Call ASP.NET function from JavaScript?
But it's not working for me. The page does post back. but my RaisePostBacKEvent never fires. I am doing this in a usercontrol and not a page:
public partial class MyTreatment : System.Web.UI.UserControl, IPostBackEventHandler
Anyone have any suggestions on how to get this working?
Thanks
Are you specifying the ClientID of your control, as opposed to the ClientID of the page (as in the example from the other SO question you referenced)?
If not then that would explain why the page is posting back but not calling the RaisePostBack method in your control.
To reference the ClientID of your control, call the __doPostBack function like so:
__doPostBack("<%= yourControlID.ClientID %>", "an argument");
As a side note, if your control is the only control on the page then the __doPostBack function will not be created by ASP.NET unless you make a call to GetPostBackEventReference for your control.
You do not necessarily need to make use of the reference but you need to call the method so the page knows to generate the client side function.
You can call GetPostBackEventReference like so:
public class MyTreatment : UserControl, IPostBackEventHandler
{
protected override void OnLoad(EventArgs e)
{
string postBackEventReference = Page.ClientScript.GetPostBackEventReference(this, string.Empty);
base.OnLoad(e);
}
public void RaisePostBackEvent(string eventArgument)
{
}
}
Hope this helps.
It should work with using the user control instance ID's UniqueID property (I couldn't get this to work with ClientID, in my own personal experiences). Like so:
__doPostBack("<%= yourControlID.UniqueID %>", "arg");
I'm writing a web page in ASP.NET. I have some JavaScript code, and I have a submit button with a click event.
Is it possible to call a method I created in ASP with JavaScript's click event?
Well, if you don't want to do it using Ajax or any other way and just want a normal ASP.NET postback to happen, here is how you do it (without using any other libraries):
It is a little tricky though... :)
i. In your code file (assuming you are using C# and .NET 2.0 or later) add the following Interface to your Page class to make it look like
public partial class Default : System.Web.UI.Page, IPostBackEventHandler{}
ii. This should add (using Tab-Tab) this function to your code file:
public void RaisePostBackEvent(string eventArgument) { }
iii. In your onclick event in JavaScript, write the following code:
var pageId = '<%= Page.ClientID %>';
__doPostBack(pageId, argumentString);
This will call the 'RaisePostBackEvent' method in your code file with the 'eventArgument' as the 'argumentString' you passed from the JavaScript. Now, you can call any other event you like.
P.S: That is 'underscore-underscore-doPostBack' ... And, there should be no space in that sequence... Somehow the WMD does not allow me to write to underscores followed by a character!
The __doPostBack() method works well.
Another solution (very hackish) is to simply add an invisible ASP button in your markup and click it with a JavaScript method.
<div style="display: none;">
<asp:Button runat="server" ... OnClick="ButtonClickHandlerMethod" />
</div>
From your JavaScript, retrieve the reference to the button using its ClientID and then call the .click() method on it.
var button = document.getElementById(/* button client id */);
button.click();
The Microsoft AJAX library will accomplish this. You could also create your own solution that involves using AJAX to call your own aspx (as basically) script files to run .NET functions.
I suggest the Microsoft AJAX library. Once installed and referenced, you just add a line in your page load or init:
Ajax.Utility.RegisterTypeForAjax(GetType(YOURPAGECLASSNAME))
Then you can do things like:
<Ajax.AjaxMethod()> _
Public Function Get5() AS Integer
Return 5
End Function
Then, you can call it on your page as:
PageClassName.Get5(javascriptCallbackFunction);
The last parameter of your function call must be the javascript callback function that will be executed when the AJAX request is returned.
You can do it asynchronously using .NET Ajax PageMethods. See here or here.
I think blog post How to fetch & show SQL Server database data in ASP.NET page using Ajax (jQuery) will help you.
JavaScript Code
<script src="http://code.jquery.com/jquery-3.3.1.js" />
<script language="javascript" type="text/javascript">
function GetCompanies() {
$("#UpdatePanel").html("<div style='text-align:center; background-color:yellow; border:1px solid red; padding:3px; width:200px'>Please Wait...</div>");
$.ajax({
type: "POST",
url: "Default.aspx/GetCompanies",
data: "{}",
dataType: "json",
contentType: "application/json; charset=utf-8",
success: OnSuccess,
error: OnError
});
}
function OnSuccess(data) {
var TableContent = "<table border='0'>" +
"<tr>" +
"<td>Rank</td>" +
"<td>Company Name</td>" +
"<td>Revenue</td>" +
"<td>Industry</td>" +
"</tr>";
for (var i = 0; i < data.d.length; i++) {
TableContent += "<tr>" +
"<td>"+ data.d[i].Rank +"</td>" +
"<td>"+data.d[i].CompanyName+"</td>" +
"<td>"+data.d[i].Revenue+"</td>" +
"<td>"+data.d[i].Industry+"</td>" +
"</tr>";
}
TableContent += "</table>";
$("#UpdatePanel").html(TableContent);
}
function OnError(data) {
}
</script>
ASP.NET Server Side Function
[WebMethod]
[ScriptMethod(ResponseFormat= ResponseFormat.Json)]
public static List<TopCompany> GetCompanies()
{
System.Threading.Thread.Sleep(5000);
List<TopCompany> allCompany = new List<TopCompany>();
using (MyDatabaseEntities dc = new MyDatabaseEntities())
{
allCompany = dc.TopCompanies.ToList();
}
return allCompany;
}
Static, strongly-typed programming has always felt very natural to me, so at first I resisted learning JavaScript (not to mention HTML and CSS) when I had to build web-based front-ends for my applications. I would do anything to work around this like redirecting to a page just to perform and action on the OnLoad event, as long as I could code pure C#.
You will find however that if you are going to be working with websites, you must have an open mind and start thinking more web-oriented (that is, don't try to do client-side things on the server and vice-versa). I love ASP.NET webforms and still use it (as well as MVC), but I will say that by trying to make things simpler and hiding the separation of client and server it can confuse newcomers and actually end up making things more difficult at times.
My advice is to learn some basic JavaScript (how to register events, retrieve DOM objects, manipulate CSS, etc.) and you will find web programming much more enjoyable (not to mention easier). A lot of people mentioned different Ajax libraries, but I didn't see any actual Ajax examples, so here it goes. (If you are not familiar with Ajax, all it is, is making an asynchronous HTTP request to refresh content (or perhaps perform a server-side action in your scenario) without reloading the entire page or doing a full postback.
Client-Side:
<script type="text/javascript">
var xmlhttp = new XMLHttpRequest(); // Create object that will make the request
xmlhttp.open("GET", "http://example.org/api/service", "true"); // configure object (method, URL, async)
xmlhttp.send(); // Send request
xmlhttp.onstatereadychange = function() { // Register a function to run when the state changes, if the request has finished and the stats code is 200 (OK). Write result to <p>
if (xmlhttp.readyState == 4 && xmlhttp.statsCode == 200) {
document.getElementById("resultText").innerHTML = xmlhttp.responseText;
}
};
</script>
That's it. Although the name can be misleading the result can be in plain text or JSON as well, you are not limited to XML. jQuery provides an even simpler interface for making Ajax calls (among simplifying other JavaScript tasks).
The request can be an HTTP-POST or HTTP-GET and does not have to be to a webpage, but you can post to any service that listens for HTTP requests such as a RESTful API. The ASP.NET MVC 4 Web API makes setting up the server-side web service to handle the request a breeze as well. But many people do not know that you can also add API controllers to web forms project and use them to handle Ajax calls like this.
Server-Side:
public class DataController : ApiController
{
public HttpResponseMessage<string[]> Get()
{
HttpResponseMessage<string[]> response = new HttpResponseMessage<string[]>(
Repository.Get(true),
new MediaTypeHeaderValue("application/json")
);
return response;
}
}
Global.asax
Then just register the HTTP route in your Global.asax file, so ASP.NET will know how to direct the request.
void Application_Start(object sender, EventArgs e)
{
RouteTable.Routes.MapHttpRoute("Service", "api/{controller}/{id}");
}
With AJAX and Controllers, you can post back to the server at any time asynchronously to perform any server side operation. This one-two punch provides both the flexibility of JavaScript and the power the C# / ASP.NET, giving the people visiting your site a better overall experience. Without sacrificing anything, you get the best of both worlds.
References
Ajax,
jQuery Ajax,
Controller in Webforms
The Microsoft AJAX library will accomplish this. You could also create your own solution that involves using AJAX to call your own aspx (as basically) script files to run .NET functions.
This is the library called AjaxPro which was written an MVP named Michael Schwarz. This was library was not written by Microsoft.
I have used AjaxPro extensively, and it is a very nice library, that I would recommend for simple callbacks to the server. It does function well with the Microsoft version of Ajax with no issues. However, I would note, with how easy Microsoft has made Ajax, I would only use it if really necessary. It takes a lot of JavaScript to do some really complicated functionality that you get from Microsoft by just dropping it into an update panel.
It is so easy for both scenarios (that is, synchronous/asynchronous) if you want to trigger a server-side event handler, for example, Button's click event.
For triggering an event handler of a control:
If you added a ScriptManager on your page already then skip step 1.
Add the following in your page client script section
//<![CDATA[
var theForm = document.forms['form1'];
if (!theForm) {
theForm = document.form1;
}
function __doPostBack(eventTarget, eventArgument) {
if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
theForm.__EVENTTARGET.value = eventTarget;
theForm.__EVENTARGUMENT.value = eventArgument;
theForm.submit();
}
}
//]]>
Write you server side event handler for your control
protected void btnSayHello_Click(object sender, EventArgs e)
{
Label1.Text = "Hello World...";
}
Add a client function to call the server side event handler
function SayHello() {
__doPostBack("btnSayHello", "");
}
Replace the "btnSayHello" in code above with your control's client id.
By doing so, if your control is inside an update panel, the page will not refresh. That is so easy.
One other thing to say is that: Be careful with client id, because it depends on you ID-generation policy defined with the ClientIDMode property.
I'm trying to implement this but it's not working right. The page is
posting back, but my code isn't getting executed. When i debug the
page, the RaisePostBackEvent never gets fired. One thing i did
differently is I'm doing this in a user control instead of an aspx
page.
If anyone else is like Merk, and having trouble over coming this, I have a solution:
When you have a user control, it seems you must also create the PostBackEventHandler in the parent page. And then you can invoke the user control's PostBackEventHandler by calling it directly. See below:
public void RaisePostBackEvent(string _arg)
{
UserControlID.RaisePostBackEvent(_arg);
}
Where UserControlID is the ID you gave the user control on the parent page when you nested it in the mark up.
Note: You can also simply just call methods belonging to that user control directly (in which case, you would only need the RaisePostBackEvent handler in the parent page):
public void RaisePostBackEvent(string _arg)
{
UserControlID.method1();
UserControlID.method2();
}
You might want to create a web service for your common methods.
Just add a WebMethodAttribute over the functions you want to call, and that's about it.
Having a web service with all your common stuff also makes the system easier to maintain.
If the __doPostBack function is not generated on the page you need to insert a control to force it like this:
<asp:Button ID="btnJavascript" runat="server" UseSubmitBehavior="false" />
Regarding:
var button = document.getElementById(/* Button client id */);
button.click();
It should be like:
var button = document.getElementById('<%=formID.ClientID%>');
Where formID is the ASP.NET control ID in the .aspx file.
Add this line to page load if you are getting object expected error.
ClientScript.GetPostBackEventReference(this, "");
You can use PageMethods.Your C# method Name in order to access C# methods or VB.NET methods into JavaScript.
Try this:
if(!ClientScript.IsStartupScriptRegistered("window"))
{
Page.ClientScript.RegisterStartupScript(this.GetType(), "window", "pop();", true);
}
Or this
Response.Write("<script>alert('Hello World');</script>");
Use the OnClientClick property of the button to call JavaScript functions...
You can also get it by just adding this line in your JavaScript code:
document.getElementById('<%=btnName.ClientID%>').click()
I think this one is very much easy!
Please try this:
<%= Page.ClientScript.GetPostBackEventReference(ddlVoucherType, String.Empty) %>;
ddlVoucherType is a control which the selected index change will call... And you can put any function on the selected index change of this control.
The simplest and best way to achieve this is to use the onmouseup() JavaScript event rather than onclick()
That way you will fire JavaScript after you click and it won't interfere with the ASP OnClick() event.
I try this and so I could run an Asp.Net method while using jQuery.
Do a page redirect in your jQuery code
window.location = "Page.aspx?key=1";
Then use a Query String in Page Load
protected void Page_Load(object sender, EventArgs e)
{
if (Request.QueryString["key"] != null)
{
string key= Request.QueryString["key"];
if (key=="1")
{
// Some code
}
}
}
So no need to run an extra code
This reply works like a breeze for me thanks cross browser:
The __doPostBack() method works well.
Another solution (very hackish) is to simply add an invisible ASP button in your markup and click it with a JavaScript method.
<div style="display: none;">
<asp:Button runat="server" ... OnClick="ButtonClickHandlerMethod" />
</div>
From your JavaScript, retrieve the reference to the button using its ClientID and then call the .Click() method on it:
var button = document.getElementByID(/* button client id */);
button.Click();
Blockquote