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.

Answer 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