newbie question - capture user control property values (ascx) to an aspx file

Mr Not So Know It All · Dec 28, 2006

newbie question - capture user control property values (ascx) to an
aspx file
sorry if this is a fundamental question. im new to c# and .Net.

is there a way to expose a property from an ascx file (user control) to
the parent aspx file. for example, let's say i have an user control
file called radiobuttons.ascx. radiobuttons.ascx inherits a compiled cs
file called radiobuttons. in radiobuttons.cs, i have a property called
radioValue. in radiobuttons.ascx i have a radiobuttonlist with two
buttons (values equal 1 and 2).

i loadcontrol the radiobuttons file (with proper casting) into an aspx
file. scenario 1 is this
i want the parent aspx file to capture the radiobutton value from
radiobuttons.ascx file.

scenario 2 is this
radiobutton.ascx is loaded into the aspx file. you click the button. it
fires an event that calls a function that gets a value from a database.
i set that value to the radioValue property from the radiobuttons.cs
file. how do i get the aspx file to capture that radioValue property
value.

thx in advance and i look forward to any help.

Mark Fitzpatrick · Dec 28, 2006

All you need to do is create public properties on the user control that
expose the values you want. You could map them directly to a control, or you
could perform some processing in the get accessor to determine what the
result should be.

For example:
To expose the selected value of a radiobutton list might look something
like:

public string SelectedValue
{
get
{
if(myRadioButtonList.SelectedIndex >= 0)
return myRadioButtonList.SelctedValue;
else
return string.Empty;
}
}

Mr Not So Know It All · Dec 28, 2006

thx Mike.
i'm trying that now. i'll let you know how it comes out.

thanks again. i really appreciate it

ric

Mr Not So Know It All · Dec 28, 2006

thanks again mike. i took your suggestion and kind of got it to work.
here's the code :

ASPX file -

<html xmlns="http://www.w3.org/1999/xhtml" >
<script runat="server">
void Page_Load(object s, EventArgs e)
{
string strControl;
Control ctl;
strControl = "radio";
ctl = LoadControl(strControl + ".ascx");
//((radio)ctl).choiceValue = "";
pl_radio.Controls.Add(ctl);
litResult.Text = ((radio)ctl).choiceValue;
}
</script>
<head runat="server">
<title>Radio Default File</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp

laceHolder ID="pl_radio" runat="server" />
</div>
From ASCX choicevalue property set during oo button click or radio
select change :
<asp:Literal ID="litResult" runat="server" />
</form>
</body>
</html>
++++++++++++++++++++++++++++++++++++++++
ASCX file -
<%@ Control Language="C#" AutoEventWireup="true" Inherits="radio" %>
<script runat="server">
void Page_Init(object s, EventArgs e)
{
//choiceValue = "red";
}

</script>
<asp:RadioButtonList ID="rad_Choice"
OnSelectedIndexChanged="button_click" AutoPostBack="true"
runat="server">
<asp:ListItem Text="Choice 1" Value="1" Selected="true" />
<asp:ListItem Text="Choice 2" Value="2" />
</asp:RadioButtonList>
<br />
<asp:Literal ID="litChoice" runat="server" />
<br />
<asp:Button ID="btn_radio" OnClick="button_click" Text="Submit"
runat="server" />
+++++++++++++++++++++++++++++++++++++++
CS compiled - radio

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

/// <summary>
/// Summary description for radio
/// </summary>
public class radio:UserControl
{
public radio()
{
//
// TODO: Add constructor logic here
//
}

protected RadioButtonList rad_Choice;
protected Literal litChoice;
private string _choiceValue;

public string choiceValue
{
get { return _choiceValue; }
set
{
_choiceValue = value;
}
}

public void button_click(object s, EventArgs e)
{
choiceValue = rad_Choice.SelectedValue;
litChoice.Text = choiceValue;
}
}
++++++++++++++++++++++++++++++
as a test, i set choiceValue (cs property) in the ascx page_init file.
the aspx litResult was able to see that and get set during the aspx
page_load. i remarked that out and tried it with a call from the button
and radio buttons to the cs button_click method. the ascx litChoice
changed, but not the aspx litResult. i think im not setting the
litResult correctly in the aspx page_load.

please take a look and send me your suggestions.

again, i really appreciate the help.

ric

Mr Not So Know It All · Dec 28, 2006

i changed the choiceValue property to be more align with your
suggestion mike. it kind of works, but not when the radio button is
clicked and autopostback (submitted).

public string choiceValue
{
get
{
return rad_Choice.SelectedValue;
}
set
{
_choiceValue = value;
}
}

when i click on the radio button, the ascx litChoice changes, but not
the aspx litResult. after i click the button, then the aspx file
changes to the current radio button value.

thanks again for pointing me in the right direction. any additional
help would be greatly appreciated.

Mr Not So Know It All · Dec 28, 2006

i found the answer in google. by adding the loadcontrol in the aspx
page_init and then retreiving it in the page_load, i was able to get
the ascx property value after each radiobutton click.

<%@ Page Language="C#" AutoEventWireup="true" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<script runat="server">
protected Control ctl;
string strControl;
void Page_Init(object s, EventArgs e)
{
strControl = "radio";
ctl = LoadControl(strControl + ".ascx");
//((radio)ctl).choiceValue = "";
pl_radio.Controls.Add(ctl);
}
void Page_Load(object s, EventArgs e)
{
litResult.Text = ((radio)ctl).choiceValue;
}
</script>
<head runat="server">
<title>Radio Default File</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp

laceHolder ID="pl_radio" runat="server" />
</div>
From ASCX choicevalue property set during button click or radio
select change :
<asp:Literal ID="litResult" runat="server" />
</form>
</body>
</html>

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newbie question - capture user control property values (ascx) to an aspx file

Mr Not So Know It All

Mark Fitzpatrick

Mr Not So Know It All

Mr Not So Know It All

Mr Not So Know It All

Mr Not So Know It All

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