Getting wrong values from dynamically created check box

Question

I am trying to read from a dynamically created checkbox on button click. The problem is that once the checkbox is checked, further uncheck operation are not read properly on submit click.

EDIT: The checkbox is initially created on the selection of a radiobuttonlist by calling SetSelection as shown.

The code snippet is shown below, Any idea what could be the possible problem?

protected void Page_Load(object sender, EventArgs e)
{    
    if (this.IsPostBack)
    {
    ..
        GenerateDynamicUI();
    }
    ...
}     


private void GenerateDynamicUI(int selectedItem)
{
    ...
    TableCell cellCheckBox = new TableCell();
    CheckBox chkBox = new CheckBox();              
    chkBox.Text = "Consider all";
    chkBox.ID = "chkAll";
    cellCheckBox.Controls.Add(chkBox);

    TableRow chkRow = new TableRow();
    chkRow.Cells.Add(cellCheckBox);
    table.Rows.Add(chkRow);
}

protected void btnSubmit_Click(object sender, EventArgs e)
{
    ...
    bool isChecked = ((CheckBox)table.FindControl("chkAll")).Checked;   

}

private void SetSelection()
{
    int selectedItem = int.Parse(radiobuttonList.SelectedItem.Value);           
    GenerateDynamicUI(selectedItem);
    pnlDynamic.Visible = true;            
}

protected void radiobuttonList_SelectedIndexChanged(object sender, EventArgs e)
{
     SetSelection();
}       

Answer 1

it looks like you declaring

bool isChecked = ((CheckBox)table.FindControl("chkAll")).Checked;

in the btnSubmit if so it would be reset to false every time the method is called. try declaring it out side. IE:

bool isChecked;
protected void btnSubmit_Click(object sender, EventArgs e)
{
    ...
    isChecked = ((CheckBox)table.FindControl("chkAll")).Checked;   

}

Answer 2

I've recreated your example and it works fine. I can only imagine there's something else in your code responsible for the unexpected behaviour.

Try using the Page_PreInit event rather than Page_Load to re-create/manipulate your dynamic controls:

protected void Page_PreInit(object sender, EventArgs e)
{
    // create controls here
    GenerateDynamicUI();
}

More info: http://msdn.microsoft.com/en-us/library/ms178472.aspx

By 'not ready properly' I assume you mean it stays True and never returns False after the first time you've check it?