calling javascript function from code behind

Question

 I'm trying to execute a javascript function from code behind...

here is my sample code...

Protected Sub btnSave_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnSave.Click

        Dim objBLLClient As New cls_BLL_Client

        objBLLClient.FirstName = txtFName.Text
        objBLLClient.LastName = txtLName.Text
        objBLLClient.MI = txtMI.Text

        objBLLClient.PrimDesp = txtPrimDesp.Text
        objBLLClient.PrimAddr1 = txtPrimAddr1.Text
        objBLLClient.PrimAddr2 = txtPrimAddr2.Text

// few more lines of code..

If Not ClientScript.IsStartupScriptRegistered("testing") Then
            Page.ClientScript.RegisterStartupScript(Me.GetType(), "testing", "getAddr()", True)
        End If

//and  few more lines

End Sub

 

<script type="text/javascript" >

function getAddr()    {
             myMap.Clear();   
   
                        var  primAddr1 = document.getElementById('<%=txtPrimAddr1.ClientID%>').value;

// few more lines...

address= primAddr1 +", " + primAddr2;

startGeocoding(address);

}

I'm not able to execute getAddr from code behind..any help would be appreciated... 

Answer 1

It should be "getAddr();" with a semicolon here:

Page.ClientScript.RegisterStartupScript(Me.GetType(), "testing", "getAddr()", True)

Otherwise, near the bottom of the page you'll get a missing ';' error:

<script type="text/javascript">
//<![CDATA[
getAddr()Sys.Application.initialize();
//]]>
</script>

BTW, instead of IsStartupScriptRegistered("testing") you'll want the (Type, String) overload. (It's helpful, for example, if you were to move all this into a User Control and include more than one instance of the user control on a page).

If Not ClientScript.IsStartupScriptRegistered(Me.GetType(), "testing") Then
    Page.ClientScript.RegisterStartupScript(Me.GetType(), "testing", "getAddr();", True)
End If

 

Answer 2

Thanks... Machine Elf

I tried but couldnt get it to work...
but when I place this in the Page_Load, getAddr() is executed...

Answer 3

You're welcome. Did you try setting a breakpoint in Protected Sub btnSave_Click to make sure it's getting called? If so, are there conditionals that might exit the sub early?

If it's too much grief over a minor mystery, you could "cheat" and detect whether it was clicked in Form_Load like so:

<asp:Button ID="btnSave" runat="server" Text="Save" OnClick="btnSave_Click" />

'In Form_Load
If Not String.IsNullOrEmpty(Request(btnSave.UniqueID)) Then
   Page.ClientScript.RegisterStartupScript(Me.GetType(), "testing", "getAddr();", True)
End If

Answer 4

Hey bing!

Did that work out OK?

Answer 5

Hi,

For the questions relating to asp.net ,please post to: http://forums.asp.net/.

Thanks,
Harry

---

Please remember to mark the replies as answers if they help and unmark them if they provide no help.
Welcome to the All-In-One Code Framework! If you have any feedback, please tell us.

Answer 6

It should be "getAddr();" with a semicolon here:

Page.ClientScript.RegisterStartupScript(Me.GetType(), "testing", "getAddr()", True)

Otherwise, near the bottom of the page you'll get a missing ';' error:

<script type="text/javascript">
span style="color:Green;">//
script>

BTW, instead of IsStartupScriptRegistered("testing") you'll want the (Type, String) overload. (It's helpful, for example, if you were to move all this into a User Control and include more than one instance of the user control on a page).

If Not ClientScript.IsStartupScriptRegistered(Me.GetType(), "testing") Then
  Page.ClientScript.RegisterStartupScript(Me.GetType(), "testing", "getAddr();", True)
End If

 

This is what I'm looking for, The sample you shared is very valuable.

Answer 7

This is what I'm looking for, The sample you shared is very valuable.

Thanks Archie, I'm glad it helped. Feel free to click the "vote as helpful" arrow, thank you!