Some of this doesn't pertain to you but it will get you what you need to get started.

public PollResult GetPollResults(XFormControl xFormControl, XForm form)
        {
            IList<XFormData> data = form.GetPostedData();
            PollResult result = new PollResult();
            ControlCollection controls = xFormControl.Controls;
            result.TotalItems = form.GetPostedDataCount();
            foreach (var item in controls)
            {
                if (item is Select1)
                {
                    var select = item as Select1;
                    if (string.IsNullOrEmpty(result.Question))
                        result.Question = select.Label;
                    var options = select.Choices.Items;
                    if (options.Count > 0)
                    {
                        foreach (var option in options)
                        {
                            var value = data.Where(p => p.Data.InnerText == option.Value).Count();
                            var resultItem = new Result();
                            resultItem.Name = option.Value;
                            resultItem.Value = value;
                            resultItem.Percentage = Math.Round(((double)value / (double)result.TotalItems) * 100, 1);
                            result.Results.Add(resultItem);
                        }
                    }
                    break;
                }
            }

            return result;
        }

Ended up wrtiting an extension method instead. Here is hiw we use it. XFormControl is a small class to hold the Name of the control, Lable, and Value.

var xFormControls = xFormPostedData.XFormControls().ToList();

public class XFormControl

{

///<summary>

/// Unique identifier of the control

///</summary>

public string Name { get; set; }

///<summary>

/// Label on the XForm control

///</summary>

public string Label { get; set; }

///<summary>

/// Value of the control

///</summary>

public string Value { get; set; }

}

///<summary>

/// Extension methods for EPiServer XFormPostedData

///</summary>

public static class XFormPostedDataExtensions

{

///<summary>

///

///</summary>

///<param name="xFormPostedData"></param>

///<returns></returns>

publicstaticList<XFormControl> XFormControls(thisXFormPostedData xFormPostedData)

{

XFormControl control = newXFormControl();

List<XFormControl> controls = newList<XFormControl>();

IEnumerable<XFormsFragment> xFormFragments = xFormPostedData.XFormFragments.ToList();

foreach (var fragment in xFormFragments.Where(f => f isXFormsFragment))

{

string fragValue = fragment.Value;

string fragNameX = fragment.Name;

string fragName = fragment.Reference; //

Type type = fragment.GetType();

//Template for every heading field

if (type == typeof(TextFragment))

{

control = newXFormControl();

control.Name = fragName;

control.Value = fragValue;

controls.Add(control);

}

//Template for every textbox field

if (type == typeof(InputFragment))

{

control = newXFormControl();

control.Name = fragName;

control.Label = ((InputFragment)(fragment)).Label;

control.Value = fragValue;

controls.Add(control);

}

//Template for every textarea field

elseif (type == typeof(TextareaFragment))

{

control = newXFormControl();

control.Name = fragName;

control.Label = ((TextareaFragment)(fragment)).Label;

control.Value = fragValue;

controls.Add(control);

}

//An option in a select control

elseif (type == typeof(SelectOption))

{

control = newXFormControl();

control.Name = fragName;

control.Value = fragValue;

controls.Add(control);

}

//Template for every checkbox field

elseif (type == typeof(SelectFragment))

{

control = newXFormControl();

control.Name = fragName;

control.Label = ((SelectFragment)(fragment)).Label;

List<SelectOption> options = ((SelectFragment)(fragment)).Options.Where(x => x.SelectedItem).ToList();

if (options != null)

{

foreach (SelectOption option in options)

{

if (string.IsNullOrEmpty(control.Value))

{

control.Value = option.Text;

}

else

{

control.Value += ", " + option.Text;

}

}

}

controls.Add(control);

}

//Template for every dropdown field

elseif (type == typeof(Select1Fragment))

{

control = newXFormControl();

control.Name = fragName;

control.Label = ((Select1Fragment)(fragment)).Label;

SelectOption option = ((Select1Fragment)(fragment)).Options.Where(x => x.SelectedItem).FirstOrDefault();

if (option != null)

{

control.Value = option.Text;

}

controls.Add(control);

}

//Template for every radio button field

elseif (type == typeof(Select1AsRadiobuttonFragment))

{

control = newXFormControl();

control.Name = fragName;

control.Label = ((Select1AsRadiobuttonFragment)(fragment)).Label;

SelectOption option = ((Select1AsRadiobuttonFragment)(fragment)).Options.Where(x => x.SelectedItem).FirstOrDefault();

if (option != null)

{

control.Value = option.Text;

}

controls.Add(control);

}

//Template for every dropdown field

elseif (type == typeof(Select1tAsDropdownListFragment))

{

control = newXFormControl();

control.Name = fragName;

control.Label = ((Select1tAsDropdownListFragment)(fragment)).Label;

control.Value = fragValue;

}

//Template for every submit button

elseif (type == typeof(SubmitFragment))

{

//This is a submit button

}

}

return controls;

}

}