How to call java script function with asp.net button?

Question

I'm write this code for my page:

<script>
    function initialize() {
        var mapProp = {
            center: new google.maps.LatLng(51.508742, -0.120850),
            zoom: 7,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        };
        var map = new google.maps.Map(document.getElementById("googleMap"), mapProp);
    }

    function loadScript() {
        var script = document.createElement("script");
        script.type = "text/javascript";
        script.src = "http://maps.googleapis.com/maps/api/js?key=&sensor=false&callback=initialize";
        document.body.appendChild(script);
    }

    window.onload = loadScript;
</script>

i want when asp button click the initialize function,and set the new value for this line:

center: new google.maps.LatLng(51.508742--->Load from asp:Text1, -0.120850--->Load from asp:Text2)

How can i do this?

Ja9ad335h · Accepted Answer · 2015-05-07 16:31:19Z

1

you can call javascript functions from asp button events

private void Button_clicked(object s, EventArgs e)
{
    //your code...

    Page.ClientScript.RegisterStartupScript(this.GetType(), "calljs", "initialize();", true);

    // 'calljs' is just a key, can be anything
    // to pass values 
    Page.ClientScript.RegisterStartupScript(this.GetType(), "calljs", "initialize(" + val1 + ", " + val2 + ");", true);
    // and modify your js function to allow parameters
}

or

if you want to call initialize(); before the button event fired,

add onclientclick="initialize();" attribute to asp button

edited May 7, 2015 at 16:31

answered May 7, 2015 at 16:22

Ja9ad335h

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2 Comments

elnaz irani Over a year ago

what is calljs? how can i send new value to function from asp textbox?

elnaz irani Over a year ago

my friend i want when i fire the button send textbox value to javascript initialize() function.

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