How to Call javascript function from asp.net content page

Question

4.00/5 (1 vote)

See more:

i was trying to call a javascript function from a back code
this is my javascript function

C#

<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
<script type="text/javascript">
        function myFunction() 
			{
                alert("hello");
			}
</script>



<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">

<asp:Button ID="btnSearch" Text="Go" runat="server" OnClick="btnSearch_Click" />

i tried calling the function like this on back code but not working.....

C#

protected void btnSearch_Click(object sender, EventArgs e)
        {
            this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "myFunction()", true);
        }

Posted 31-Jul-14 22:20pm

breab

Updated 31-Jul-14 22:32pm

Dilan Shaminda

v3

Add a Solution

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Chintan Desai1988 · Answer 1 · 2014-07-31T22:37:00

Solution 1

I tried your example with my testing application and it's working properly as you can also try the code given by me:

XML

<asp:Content ID="Content1" runat="server" ContentPlaceHolderID="ContentPlaceHolder1">

    <script type="text/javascript">
        function GetMSG() {
            alert("hello");
        }
    </script>

</asp:Content>
<asp:Content ID="Content2" runat="server" ContentPlaceHolderID="ContentPlaceHolder2">
    <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
</asp:Content>

And write a code for invoke function on button click even on code behind page:

C#

protected void Button1_Click(object sender, EventArgs e)
       {
           ScriptManager.RegisterStartupScript(Page, Page.GetType(), "GetMSG", "GetMSG();", true);
           //this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "GetMSG()", true);
       }

please try this example. I hope its helping to you.....Thank You......:-)

Posted 31-Jul-14 22:37pm

Chintan Desai1988

Comments

breab 1-Aug-14 4:48am

your works just fine
this is inside the asp:content
<input type="text" id="hidden" runat="server" style="display:none" />

and my real function is

function myFunction() {
var fname = document.getElementById("hidden").value;
alert(fname);
alert("djd");
var mapOptions =
{
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var infowindow = new google.maps.InfoWindow();
var map = new google.maps.Map(document.getElementById('displayMap'), mapOptions);
alert("ff");
//get Location info

$.ajax({
type: "GET",
url: "Location\\" + fname + "",
dataType: "xml",
success: function (xml) {
$(xml).find("Location").each(function () {
//alert("dd");

Loc = $(this).find("Loc_Name").text();
Lat = $(this).find("Latitude").text();
Long = $(this).find("Longitude").text();
var loc = new google.maps.LatLng(Lat, Long);
//alert(Lat);
//center teh incident
map.setCenter(loc);

var marker = new google.maps.Marker({
position: new google.maps.LatLng(Lat, Long),
map: map,
title: 'My workplace',
icon: 'http://google-maps-icons.googlecode.com/files/factory.png'

});

google.maps.event.addListener(marker, 'click', function () {

infowindow.setContent(Loc);
infowindow.open(map, marker);

});

});
}

});
}

_Amy · Answer 2 · 2014-07-31T22:38:00

First of all I would suggest you to write your JavaScript in .js file and add reference to your aspx page.

HTML

<script src="../JS/MyJavascript.js" type="text/javascript"></script>

Then try calling your JavaScript function like this:

C#

ScriptManager.RegisterClientScriptBlock(base.Page, this.GetType(), "MyScript", "myFunction();", true);

--Amy

Wombaticus · Answer 3 · 2014-07-31T22:42:00

If you want to call it when the button is clicked you can do so on the client side, befreo postback, by adding in page_load

btnSearch.Attributes.Add("onlcick", "myFunction()")

You can even then prevent the postback by returning false form your JavaScript function.
However, if you really want to call it from the click event after postback in code:

ClientScript.RegisterStartupScript(Me.GetType(), "alert", "myFunction()", True)

How to Call javascript function from asp.net content page

3 solutions

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0