Get the primarykey on radio button click - winforms

Question

I have several radio buttons that are dynamically populated on a form and I have set a click event on the dynamically created radio buttons. On click i get a returned value as follows through debugging (eg) "sender { Text = "this is answer one" + Checked = "True"} using code as follows:
//Radio button click:
void Form1_Click(object sender, EventArgs e)
{
RadioButton rb = sender as RadioButton;
string radioButtonValue = rb.Text;
if (radioButtonValue != String.Empty)
{
}
}
The debug values are returned via "RadioButton rb = sender as RadioButton;" - the diffrent radio buttons text is set via a dataset that I call in a local dataset that loops through the dataset and and sets the radio button text accordingly (eg):
for (int i = 0; i < _dataSetRadioButtons.Tables["tbl_QuestionnaireAnswer"].Rows.Count; i++)
{
radioButtons[i] = new RadioButton();
radioButtons[i].AutoCheck = true;
radioButtons[i].Text = _dataSetRadioButtons.Tables["tbl_QuestionnaireAnswer"].Rows[i]["tbl_QuestionnaireAnswer_Description"].ToString();
radioButtons[i].Location = new System.Drawing.Point(60, 20 + i * 20);
radioButtons[i].Click += new EventHandler(Form1_Click);
panel.Controls.Add(radioButtons[i]);
}
So: wat id like to know is on the radio button click (Form1_Click) event is it possible to return the primary key of the of the selected radio button that I choose and not just the sender { Text = "this is answer one" + Checked = "True"} as I would like to use the primarykey in that dataset to write back to my Database.
Thanks in advance.
Kind regards
geo

Answer 1

Most winforms controls contain the Tag property that is used to contain custom user data in the control. You can read more at: http://msdn.microsoft.com/en-us/library/system.windows.forms.control.tag.aspx
So, your solution should be simpler and more concise like this:
for (int i = 0; i < _dataSetRadioButtons.Tables["tbl_QuestionnaireAnswer"].Rows.Count; i++)
{
radioButtons[i] = new RadioButton();
radioButtons[i].AutoCheck = true;
radioButtons[i].Location = new System.Drawing.Point(60, 20 + i * 20);
radioButtons[i].Tag = _dataSetRadioButtons.Tables["tbl_QuestionnaireAnswer"].Rows[i];
radioButtons[i].Click += new EventHandler(Form1_Click);
panel.Controls.Add(radioButtons[i]);
}
This includes a relevant datarow in the radiobutton. The next thing is to get any data from it you need:
//Radio button click:
void Form1_Click(object sender, EventArgs e)
{
RadioButton radioButton = sender as RadioButton;
if (radioButton == null)
return;
DataRow row = radioButton.Tag as DataRow;
if (row == null)
return;
/* Post any processing here. e.g.
MessageBox.Show(row["ID"].ToString());
*/
}
This way you have all the data and it's strongly typed, which is a good thing.