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/* System.Web.UI.HtmlControls
* Authors
* Leen Toelen (toelen@hotmail.com)
*/
using System;
using System.Web;
using System.Web.UI;
using System.Globalization;
using System.Collections.Specialized;
namespace System.Web.UI.HtmlControls{
public class HtmlInputRadioButton : HtmlInputControl, IPostBackDataHandler{
private static readonly object EventServerChange;
public HtmlInputRadioButton(): base("radio"){}
protected override void OnPreRender(EventArgs e){
if (Page != null && !Disabled){
Page.RegisterRequiresPostBack(this);
}
if (Events[EventServerChange] != null && !Disabled){
ViewState.SetItemDirty("checked", false);
}
}
protected void OnServerChange(EventArgs e){
EventHandler handler = (EventHandler) Events[EventServerChange];
if (handler != null){
handler.Invoke(this, e);
}
}
protected override void RenderAttributes(HtmlTextWriter writer){
writer.WriteAttribute("value", Value);
Attributes.Remove("value");
base.RenderAttributes(writer);
}
public bool LoadPostData(string postDataKey, NameValueCollection postCollection){
string postValue = postCollection[postDataKey];
bool myBool = false;
if (postValue != null && postValue.Equals(Value)){
if (!Checked){
Checked = true;
myBool = true;
}
}
else{
if (Checked){
Checked = false;
myBool = false;
}
}
return myBool;
}
public void RaisePostDataChangedEvent(){
OnServerChange(EventArgs.Empty);
}
public event EventHandler ServerChange{
add{
Events.AddHandler(EventServerChange, value);
}
remove{
Events.RemoveHandler(EventServerChange, value);
}
}
public bool Checked{
get{
string attr = Attributes["checked"];
if (attr != null){
return attr.Equals("checked");
}
return false;
}
set{
if (value != true){
Attributes["checked"] = null;
}
Attributes["checked"] = "checked";
}
}
public override string Name
{
get {
string attr = Attributes ["name"]; // Gotta use "name" to group radio buttons
return (attr == null) ? String.Empty : attr;
}
set { Attributes ["name"] = value; }
}
protected override string RenderedName{
get{
string attr = base.RenderedName;
string id = UniqueID;
int indexOfX = id.LastIndexOf('X');
if (indexOfX != 0 && indexOfX >= 0){
attr = String.Concat(attr, id.Substring(0,indexOfX+1));
}
return attr;
}
}
public override string Value
{
get {
string v = Attributes ["value"];
if (v != null && v != "")
return v;
v = ID;
Attributes ["value"] = v;
return v;
}
set { Attributes ["value"] = value; }
}
} // class HtmlInputRadioButton
} // namespace System.Web.UI.HtmlControls
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