// RenderAsGroup returns a RadioButtonGroup object if the group should be
// rendered in a single <select> statement, or null if autopostback should
// be enabled.
//
private RadioButtonGroup RenderAsGroup(RadioButton r)
{
bool startedSequence = false;
bool finishedSequence = false;
RadioButtonGroup group = new RadioButtonGroup();
//
foreach (Control c in r.Parent.Controls)
{
RadioButton radioSibling = c as RadioButton;
LiteralControl literalSibling = c as LiteralControl;
if (radioSibling != null && radioSibling.UniqueGroupName == r.UniqueGroupName)
{
startedSequence = true;
group.ButtonsInGroup++;
if (radioSibling.Checked == true)
{
group.SelectedButton = radioSibling.UniqueID;
}
if (finishedSequence || !radioSibling.Enabled)
{
group.ButtonsInGroup = -1; // can't be rendered in a group
break;
}
}
else if (startedSequence && (literalSibling == null || !IsWhiteSpace(literalSibling.Text)))
{
finishedSequence = true;
}
}
return(group);
}
// RenderAsGroup returns a RadioButtonGroup object if the group should be
// rendered in a single <select> statement, or null if autopostback should
// be enabled.
//
private RadioButtonGroup RenderAsGroup(RadioButton r) {
bool startedSequence = false;
bool finishedSequence = false;
RadioButtonGroup group = new RadioButtonGroup();
//
foreach (Control c in r.Parent.Controls) {
RadioButton radioSibling = c as RadioButton;
LiteralControl literalSibling = c as LiteralControl;
if (radioSibling != null && radioSibling.UniqueGroupName == r.UniqueGroupName) {
startedSequence = true;
group.ButtonsInGroup++;
if (radioSibling.Checked == true) {
group.SelectedButton = radioSibling.UniqueID;
}
if (finishedSequence || !radioSibling.Enabled) {
group.ButtonsInGroup = -1; // can't be rendered in a group
break;
}
}
else if (startedSequence && (literalSibling == null || !IsWhiteSpace(literalSibling.Text))) {
finishedSequence = true;
}
}
return group;
}
// Renders the control.
protected internal override void Render(HtmlTextWriter markupWriter)
{
WmlTextWriter writer = (WmlTextWriter)markupWriter;
DetermineGroup(Control);
RadioButtonGroup group = GetGroupByName(Control.UniqueGroupName);
if (group != null)
{
if (!group.RegisteredGroup)
{
// GroupFormVariable is passed as the name & value becuase it is both the key
// for the postback data, and the WML client side var used to
// select an item in the list.
((WmlPageAdapter)PageAdapter).RegisterPostField(writer, GroupFormVariable, GroupFormVariable, true /*dynamic field*/, false /*random*/);
group.RegisteredGroup = true;
}
if (group.RenderAsGroup)
{
// Render opening select if not already opened
if (!group.RenderedSelect)
{
if (group.SelectedButton != null)
{
((WmlPageAdapter)PageAdapter).AddFormVariable(writer, GroupFormVariable, group.SelectedButton, false /*random*/);
}
writer.WriteBeginSelect(GroupFormVariable, group.SelectedButton, null /*iname */,
null /*ivalue*/, Control.ToolTip, false /*multiple */);
if (!writer.AnalyzeMode)
{
group.RenderedSelect = true;
}
}
// Render option
// We don't do autopostback if the radio button has been selected.
// This is to make it consistent that it only posts back if its
// state has been changed. Also, it avoids the problem of missing
// validation since the data changed event would not be fired if the
// selected radio button was posting back.
if (Control.AutoPostBack && !Control.Checked)
{
((WmlPageAdapter)PageAdapter).RenderSelectOptionAsAutoPostBack(writer, Control.Text, Control.UniqueID);
}
else
{
((WmlPageAdapter)PageAdapter).RenderSelectOption(writer, Control.Text, Control.UniqueID);
}
// Close, if list is finished
if (!writer.AnalyzeMode && --group.ButtonsInGroup == 0)
{
writer.WriteEndSelect();
}
}
// must render as autopostback, radio buttons not in consecutive group.
else
{
if (!Control.Enabled)
{
RenderDisabled(writer);
return;
}
string iname = Control.Checked ? Control.ClientID : null;
string ivalue = Control.Checked ? "1" : null;
if (ivalue != null)
{
((WmlPageAdapter)PageAdapter).AddFormVariable(writer, iname, ivalue, false /*random*/);
}
writer.WriteBeginSelect(null, null, iname, ivalue, Control.ToolTip, true /*multiple*/);
if (!Control.Checked)
{
((WmlPageAdapter)PageAdapter).RenderSelectOptionAsAutoPostBack(writer, Control.Text, GroupFormVariable, Control.UniqueID);
}
else
{
((WmlPageAdapter)PageAdapter).RenderSelectOption(writer, Control.Text, Control.UniqueID);
}
writer.WriteEndSelect();
}
}
}