[RESOLVED] how i can return value string from function javascript to code-behind asp.net

[prokhaled]

Hi All,
how i can return value string from function javascript to code-behind asp.net
directly as this syntax example but this give me errors

in html code

<script>
function Getstr()
{
return "MyStr";
}
</script>

in code-behind
Page.ClientScript.RegisterStartupScript(Me.Getstr(), "alert", "Getstr();", True)

[brin351]

One way is to make the javascript method set the value of a hidden field control/element then when the page is posted back get the value from the hiddenField.

[prokhaled]

thank you very much for reply me
but that is means no other solution expect hidden field control/element
no direct solution

[brin351]

well javascript runs on the client (browser). If you want javascript to communicated with the server you can use ajax but perhaps it would be better to give a broader overview of what you need the page to do.

[prokhaled]

thank you for reply
my page aspx include button facebook connection
to give me information like name,age,......about user
by facebook JavaScript API
i want save it in database by make function js return directly value to code-behind

I wish I could find this

[Webskater]

Hi All,
how i can return value string from function javascript to code-behind asp.net
directly as this syntax example but this give me errors

in html code

<script>
function Getstr()
{
    document.getElementById('hfMyStr').value = MyStr;
document.getElementById('btnSubmitString').click();
}
</script>

on the aspx page

<form id="form1" runat="server">
<asp:HiddenField ID="hfMyStr" runat="server" />
    <asp:Button ID="btnSubmitString" runat="server" Height="0" Width="0" OnClick="btnSubmitString_Click" />
</form>

in code-behind

protected void btnSubmitString_Click(object sender, EventArgs e)
{
ScriptManager.RegisterStartupScript(this, this.GetType(), "myAlert", "alert('" + hfMyStr.Value + "');", true);

What is wrong with brin's suggestion?

[prokhaled]

thanks for all

[gep13]

Hello,

For the benefit of other people who might be reading your thread, you might want to think about telling us what your final solution was.

Gary

[prokhaled]

For the benefit of other people who might be reading your thread, you might want to think about telling us what your final solution was.

How i can do this i can not remember

[prokhaled]

thank u i remember that

[gep13]

I'm confused

[pukisoft]

I'm confused

Heh. Me too, I opened the thread because I saw it marked as resolved and all I can see is a somewhat funny reply.

Can anyone suggest how do you do what the poster asked?
(other than the solution brin already provided, is there other methods to do it withut a hidden field?)

[gep13]

Another solution would be to put the variables onto the QueryString, and inspect the Query String variables on the server.

This isn't a particularly secure way of doing things though. It is better to POST the information to the server, as suggested by Brin, with the use of the HiddenField.

Gary