Sending asp:TextBox value to JavaScript

[Dave]

I have a button that calls a JavaScript. I need to get the value in an
asp:TextBox field to the javascript, either as a parameter or via some
mechanism within the JavaScript itself.

Any Ideas?

TIA,
Dave

[Hermit Dave]

how about onClick on a html button ? or if you want a server control then

btnPassValue.Attributes.Add("onClick", "javascript:ReadVal(this);");

on aspx page you can have a javascript like
<script language=Javascript>
function ReadVal(f)
{
var valueBeingRead = f.Value;
}
</script>

something like this should do the job

--

Regards,

Hermit Dave
(http://hdave.blogspot.com)
"Dave" <Da**@discussions.microsoft.com> wrote in message
news:81**********************************@microsof t.com...

I have a button that calls a JavaScript. I need to get the value in an
asp:TextBox field to the javascript, either as a parameter or via some
mechanism within the JavaScript itself.

Any Ideas?

TIA,
Dave

[Hermit Dave]

my bad.. .my bad..
sorry onClick button and this would pass reference to the button and not the
text box.

another problem would be the actual ids of the textbox in the rendered html.
have a look at those. you might have to do it the hard way ie ur the names
as rendered not the ids as in designer. (do a vew >> source )
if this is too messed up consider using plain old html control <input
type=text maxlength=50 name="mytextbox1"> etc

hth

--

Regards,

Hermit Dave
(http://hdave.blogspot.com)
"Dave" <Da**@discussions.microsoft.com> wrote in message
news:7D**********************************@microsof t.com...

Guess more details are needed.

My text field is defined:
<asp:TextBox ID="txtAdjPoints" Width="65" Runat="server"></asp:TextBox>

My button is defined:
<Button ID="btnAdjustment" OnClick="NeedSupervisor(this)">Process
Adjustment</Button>

The top of JavaScript looks like:
function NeedSupervisor(val)
{
document.write("First line ");
document.write("<br>");
document.write(val.value);
document.write("<br>");
document.write(document.all["txtAdjPoints"].item);
document.write("<br>");
return;
...

(The return is for testing purposes till I solve this problem). I've also
tried:
document.all["txtAdjPoints"].ToString()
I've tried getElementByName and getElementById (The name property doesn't
apply to an ASP:TextBox, so not surprised that returns an empty list).

When I use getElementById and try to print the className iget a blank. I
tried printing the className for the object being passed in and also got a
blank.

[Hermit Dave]

well you can do something like this

<TEXTAREA cols="20" id="TextArea1">
</TEXTAREA>
<br>
<INPUT type="text" id="TextBox1">

in your code behind at reference to the html objects
protected System.Web.UI.HtmlControls.HtmlInputText TextBox1;

protected System.Web.UI.HtmlControls.HtmlTextArea TextArea1;

and then you can use them like anywhere in codebehind.

private void Page_Load(object sender, System.EventArgs e)

{

// Put user code to initialize the page here

string textBoxVal = TextBox1.Value;

string textAreaVal = TextArea1.Value;

}

also if you are looking for modal dialog then you might want to check
www.asp.net site... and go to control gallery
--

Regards,
Hermit Dave
(http://hdave.blogspot.com)
"Dave" <Da**@discussions.microsoft.com> wrote in message
news:EF**********************************@microsof t.com...

Actually I'm doing all my work in the HTML source. And I've considered using a plain text field, however, the entire scenario is:

User enters value in text box. Then presses button to post the adjustment.
The JavaScript tests the value to see if its less than 200. When its less,
the code action is to proceed straight to an ASP C# event handler (via the
fireEvent method). When its greater (and this is the real need for
JavaScript) the showModalDialog function is called to collect a username
password. These values are then returned via parameters and inserted into
hidden fields so that my C# handler can pick up and verify those fields.

Now if I knew how to initiate a Modal Dialog box server side, I might (given what a pain this is turning out to be) just reconsider using JavaScript.

Since I'm still a rookie with ASP.net, I would need to know how I can bind a standard input text box to the server side ASP web control.

Thanks So Much for your help so, far.
Dave

"Hermit Dave" wrote:

my bad.. .my bad..
sorry onClick button and this would pass reference to the button and not the text box.

another problem would be the actual ids of the textbox in the rendered html. have a look at those. you might have to do it the hard way ie ur the names as rendered not the ids as in designer. (do a vew >> source )
if this is too messed up consider using plain old html control <input
type=text maxlength=50 name="mytextbox1"> etc

hth

--

Regards,

Hermit Dave
(http://hdave.blogspot.com)
"Dave" <Da**@discussions.microsoft.com> wrote in message
news:7D**********************************@microsof t.com...