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/**
* Namespace: System.Web.UI.WebControls
* Class: RadioButtonList
*
* Author: Gaurav Vaish
* Maintainer: gvaish@iitk.ac.in
* Contact: <my_scripts2001@yahoo.com>, <gvaish@iitk.ac.in>
* Implementation: yes
* Status: 95%
*
* (C) Gaurav Vaish (2002)
*/
using System;
using System.Collections.Specialized;
using System.Globalization;
using System.Web;
using System.Web.UI;
namespace System.Web.UI.WebControls
{
[ValidationProperty("SelectedItem")]
public class RadioButtonList : ListControl, IRepeatInfoUser, INamingContainer, IPostBackDataHandler
{
private bool selectionIndexChanged;
private short tabIndex;
public RadioButtonList(): base()
{
selectionIndexChanged = false;
}
public virtual int CellPadding
{
get
{
if(ControlStyleCreated)
{
return (int)(((TableStyle)ControlStyle).CellPadding);
}
return -1;
}
set
{
((TableStyle)ControlStyle).CellPadding = value;
}
}
public virtual int CellSpacing
{
get
{
if(ControlStyleCreated)
{
return (int)(((TableStyle)ControlStyle).CellSpacing);
}
return -1;
}
set
{
((TableStyle)ControlStyle).CellSpacing = value;
}
}
public virtual int RepeatColumns
{
get
{
object o = ViewState["RepeatColumns"];
if(o != null)
return (int)o;
return 0;
}
set
{
if(value < 0)
throw new ArgumentOutOfRangeException("value");
ViewState["RepeatColumns"] = value;
}
}
public virtual RepeatDirection RepeatDirection
{
get
{
object o = ViewState["RepeatDirection"];
if(o != null)
return (RepeatDirection)o;
return RepeatDirection.Vertical;
}
set
{
if(!Enum.IsDefined(typeof(RepeatDirection), value))
throw new ArgumentException();
ViewState["RepeatDirection"] = value;
}
}
public virtual RepeatLayout RepeatLayout
{
get
{
object o = ViewState["RepeatLayout"];
if(o != null)
return (RepeatLayout)o;
return RepeatLayout.Table;
}
set
{
if(!Enum.IsDefined(typeof(RepeatLayout), value))
throw new ArgumentException();
ViewState["RepeatLayout"] = value;
}
}
public virtual TextAlign TextAlign
{
get
{
object o = ViewState["TextAlign"];
if(o != null)
return (TextAlign)o;
return TextAlign.Right;
}
set
{
if(!Enum.IsDefined(typeof(TextAlign), value))
throw new ArgumentException();
ViewState["TextAlign"] = value;
}
}
protected override Style CreateControlStyle()
{
return new TableStyle(ViewState);
}
protected override void Render(HtmlTextWriter writer)
{
RepeatInfo info = new RepeatInfo();
Style cStyle = (ControlStyleCreated ? ControlStyle : null);
bool dirty = false;
tabIndex = TabIndex;
if(tabIndex != 0)
{
dirty = !ViewState.IsItemDirty("TabIndex");
TabIndex = 0;
}
info.RepeatColumns = RepeatColumns;
info.RepeatDirection = RepeatDirection;
info.RenderRepeater(writer, this, cStyle, this);
if(tabIndex != 0)
{
TabIndex = tabIndex;
}
if(dirty)
{
ViewState.SetItemDirty("TabIndex", false);
}
}
bool IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection)
{
string value = postCollection[postDataKey];
for(int i=0; i < Items.Count; i++)
{
if(Items[i].Value == value)
{
if(i != SelectedIndex)
{
SelectedIndex = i;
}
return true;
}
}
return false;
}
void IPostBackDataHandler.RaisePostDataChangedEvent()
{
if(selectionIndexChanged)
OnSelectedIndexChanged(EventArgs.Empty);
}
Style IRepeatInfoUser.GetItemStyle(System.Web.UI.WebControls.ListItemType itemType, int repeatIndex)
{
return null;
}
void IRepeatInfoUser.RenderItem (System.Web.UI.WebControls.ListItemType itemType,
int repeatIndex,
RepeatInfo repeatInfo,
HtmlTextWriter writer)
{
/* Create a new RadioButton as if it was defined in the page and render it */
RadioButton button = new RadioButton ();
button.GroupName = UniqueID;
button.TextAlign = TextAlign;
button.AutoPostBack = AutoPostBack;
button.ID = ClientID + "_" + repeatIndex.ToString (NumberFormatInfo.InvariantInfo);;
object view_state = ViewState ["TabIndex"];
if (view_state != null)
button.TabIndex = (short) view_state;
ListItem current = Items [repeatIndex];
button.Text = current.Text;
button.Attributes ["value"] = current.Value;
button.Checked = current.Selected;
button.RenderControl (writer);
}
bool IRepeatInfoUser.HasFooter
{
get
{
return false;
}
}
bool IRepeatInfoUser.HasHeader
{
get
{
return false;
}
}
bool IRepeatInfoUser.HasSeparators
{
get
{
return false;
}
}
int IRepeatInfoUser.RepeatedItemCount
{
get
{
return Items.Count;
}
}
}
}
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