Call Client Side function from Server side where i want to ASP.NET ajax

Question

I have Client-Side button event. After click call sgnPdf(ID) if I can sign PDF.

[MyForm.aspx]

 <script type="text/javascript">
    <% if (ViewData.CanSignPdf){ %>
    $(function() {
        $("#<%=btnSend.ClientID %>").click(function() {
            if ($('.IgnoreCheckBox').is(':checked')) {
                sgnPdf(<%=ViewData.NoticeID %>);
                return false;
            };
        });
    });
    <% } %>
</script>

But I need call this function from Server side after button click.

[MyForm.aspx.cs]

  protected void BtnSendClick(object sender, EventArgs e)
    {
        FormUnbindData();
        SaveMYData();
        //Here i want call client function sgnPdf(ID). How can I do this?
        ShowMyMessage();
    }

OK, you need to do just simply. For example call alert("message") in there.

Ok, its works!!! but i need call client-side method(javascript) from server-side(C#) synchronously, becouse client-side method not starting until server-side method ends (for example button_click event).

I try this:

            ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), "anyId", "<script type='text/javascript'>alert('This is my alert message');</script>", true);

and no action, nothing.

+1 for the nice question by a newbie!

Viral Shah
– Viral Shah

2012-09-25 13:31:15 +00:00
Commented Sep 25, 2012 at 13:31 — Viral Shah
– Viral Shah, Commented Sep 25, 2012 at 13:31

A Developer · Accepted Answer · 2012-09-25 13:54:21Z

1

Use this when button click:

 ClientScript.RegisterClientScriptBlock(Page, typeof(Page),sgnPdf(ID), true); 

OR
    <asp:Button OnClientClick = "sgnPdf(ID)"/>

Use this on page load:

RegisterStartupScript("Unique key", "sgnPdf(ID);");

Here is a Reference

edited Sep 25, 2012 at 13:54

answered Sep 25, 2012 at 13:38

A Developer

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3 Comments

Emis Over a year ago

I think RegisterStartupScript works only in Page_Load(Object sender, EventArgs e) event.

Emis Over a year ago

But i need call sgnPdf(ID) when after button click FormUnbindData() and SaveMYData(). THEN call sgnPdf(ID).

A Developer Over a year ago

@Emis-- you can use RegisterClientScriptBlock for your need.

Amol Kolekar · Accepted Answer · 2012-09-26 11:31:01Z

1

try following....

protected void BtnSendClick(object sender, EventArgs e)
     {
         FormUnbindData();
         SaveMYData();
         **Edit**
         ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), "anyId", "<script language='javascript'>sgnPdf('"+ID+"');</script>", true);            

         ShowMyMessage();
     }

edited Sep 26, 2012 at 11:31

answered Sep 25, 2012 at 14:17

Amol Kolekar

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1 Comment

Amol Kolekar Over a year ago

if you were not able to call the javascript function from first method,i have changed it now,just an overload,try to use it and check whether it solves you problem...

user3497034 · Accepted Answer · 2014-04-05 06:46:59Z

0

If you are using UpdatePanel on your page then you can call client side function from server side using ScriptManager.RegisterStartupScript

Use below code in button click event

ScriptManager.RegisterStartupScript(this, this.GetType(), "script234", "sgnPdf('"+ID+"');", true);

If you are not using UpdatePanel on your page then you can call client side function from server side using ClientScript.RegisterStartupScript

use below code in button click event

ClientScript.RegisterStartupScript(this.GetType(), "script234", "sgnPdf('"+ID+"');", true);

answered Apr 5, 2014 at 6:46

user3497034

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