Jquery asp net Button Click Event via ajax

Question

I was wondering if anyone can point me in the right direction  I have an asp net button with a click event  that runs some server side code   What i d like to  do is call this event via ajax and jquery  Is there any way to do this  If so  i would love some examples   Thanks in advance

User · Accepted Answer

This is where jQuery really shines for ASP.Net developers. Lets say you have this ASP button:

When that renders, you can look at the source of the page and the id on it won't be btnAwesome, but $ctr001_btnAwesome or something like that. This makes it a pain in the butt to find in javascript. Enter jQuery.

$(document).ready(function() {
  $("input[id$='btnAwesome']").click(function() {
    // Do client side button click stuff here.
  });
});

The id$= is doing a regex match for an id ENDING with btnAwesome.

Edit:

Did you want the ajax call being called from the button click event on the client side? What did you want to call? There are a lot of really good articles on using jQuery to make ajax calls to ASP.Net code behind methods.

The gist of it is you create a static method marked with the WebMethod attribute. You then can make a call to it using jQuery by using $.ajax.

$.ajax({
  type: "POST",
  url: "PageName.aspx/MethodName",
  data: "{}",
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  success: function(msg) {
    // Do something interesting here.
  }
});

I learned my WebMethod stuff from: http://encosia.com/2008/05/29/using-jquery-to-directly-call-aspnet-ajax-page-methods/

A lot of really good ASP.Net/jQuery stuff there. Make sure you read up about why you have to use msg.d in the return on .Net 3.5 (maybe since 3.0) stuff.

User · Answer

In the client side handle the click event of the button  use the ClientID property to get he id of the button     document  ready function          lt   myButton ClientID   gt    lt   muSecondButton ClientID  gt    click       function            get   myPage aspx   id   this  attr  id    function data              do something with the data      return false                        In your page on the server   protected void Page Load object sender EventArgs e        check if it is an ajax request  if  Request Headers  X-Requested-With       XMLHttpRequest       if  Request QueryString  id    myButton ClientID           call the click event handler of the myButton here     Response End          if  Request QueryString  id    mySecondButton ClientID           call the click event handler of the mySecondButton here     Response End

User · Answer

I found myself wanting to do this and I reviewed the above answers and did a hybrid approach of them   It got a little tricky  but here is what I did   My button already worked with a server side post  I wanted to let that to continue to work so I left the  OnClick  the same  but added a OnClientClick   OnClientClick  if   OnClick Submit    return false     Here is my full button element in case it matters    lt asp Button UseSubmitBehavior  false  runat  server  Class  ms-ButtonHeightWidth jiveSiteSettingsSubmit  OnClientClick  if   OnClick Submit    return false   OnClick  BtnSave Click  Text   lt   Resources wss multipages okbutton text  gt   id  BtnOK  accesskey   lt   Resources wss okbutton accesskey  gt   Enabled  true   gt    If I inspect the onclick attribute of the HTML button at runtime it actually looks like this   if   OnClick Submit    return false WebForm DoPostBackWithOptions new WebForm PostBackOptions  ctl00 PlaceHolderMain ctl03 RptControls BtnOK       true          false  true     Then in my Javascript I added the OnClick Submit method   In my case I needed to do a check to see if I needed to show a dialog to the user   If I show the dialog I return false causing the event to stop processing   If I don t show the dialog I return true causing the event to continue processing and my postback logic to run as it used to   function OnClick Submit         var initiallyActive   initialState socialized  amp  amp  initialState activityEnabled      var socialized   IsSocialized        var enabled   ActivityStreamsEnabled         var displayDialog          Omitted the setting of displayDialog for clarity      if  displayDialog                myDialog   dialog  open            return false            else           return true            Then in my Javascript code that runs when the dialog is accepted  I do the following depending on how the user interacted with the dialog       myDialog   dialog  close      doPostBack  message          The  message  above is actually different based on what message I want to send   But wait  there s more   Back in my server-side code  I changed OnLoad from   protected override void OnLoad EventArgs e        base OnLoad e      if  IsPostBack                return                OnLoad logic removed for clarity     To   protected override void OnLoad EventArgs e        base OnLoad e      if  IsPostBack                switch  Request Form    EVENTTARGET                          case  message1                      We did a   doPostBack with the  message1  command provided                 Page Validate                    BtnSave Click this  new CommandEventArgs  message1   null                    break               case  message2                      We did a   doPostBack with the  message2  command provided                 Page Validate                    BtnSave Click this  new CommandEventArgs  message2   null                    break                            return                OnLoad logic removed for clarity     Then in BtnSave Click method I do the following   CommandEventArgs commandEventArgs   e as CommandEventArgs  string message    commandEventArgs    null    null   commandEventArgs CommandName    And finally I can provide logic based on whether or not I have a message and based on the value of that message

User · Answer

I like Gromer s answer  but it leaves me with a question  What if I have multiple  btnAwesome s in different controls   To cater for that possibility  I would do the following     document  ready function            lt   myButton ClientID   gt    click function            Do client side button click stuff here              It s not a regex match  but in my opinion  a regex match isn t what s needed here  If you re referencing a particular button  you want a precise text match such as this   If  however  you want to do the same action for every btnAwesome  then go with Gromer s answer

User · Answer

ASP NET web forms page already have a JavaScript method for handling PostBacks called    doPostBack     function   doPostBack eventTarget  eventArgument        if   theForm onsubmit     theForm onsubmit      false             theForm   EVENTTARGET value   eventTarget          theForm   EVENTARGUMENT value   eventArgument          theForm submit              Use the following in your code file to generate the JavaScript that performs the PostBack   Using this method will ensure that the proper ClientID for the control is used   protected string GetLoginPostBack         return Page ClientScript GetPostBackEventReference btnLogin  string Empty       Then in the ASPX page add a javascript block    lt script language  javascript  gt  function btnLogin Click        lt    GetLoginPostBack     gt      lt  script gt    The final javascript will be rendered like this    lt script language  javascript  gt  function btnLogin Click         doPostBack  btnLogin          lt  script gt    Now you can use  btnLogin Click    from your javascript to submit the button click to the server

[jquery] Jquery asp.net Button Click Event via ajax

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