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

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)

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.

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

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.

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

Quote:

---

Originally Posted by 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

Code:

---

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

---

on the aspx page

Code:

---

<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

Code:

---

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?

thanks for all

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

Code:

---

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

thank u i remember that

I'm confused :(

Quote:

---

Originally Posted by gep13

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?)

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