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/**
* Project : Mono
* Namespace : System.Web.Mobile.Util
* Class : ListDataHelper
* Author : Gaurav Vaish
*
* Copyright : 2003 with Gaurav Vaish, and with
* Ximian Inc
*/
using System.Collections;
using System.Web.UI;
using System.Web.Mobile;
using System.Web.UI.MobileControls;
namespace System.Web.Mobile.Util
{
internal class ListDataHelper
{
private object dataSource;
private int dataSourceCount = -1;
private IEnumerable resolvedDataSrc;
private MobileListItemCollection items;
private string dataTextField;
private string dataValueField;
private bool bindFromFields;
private IListControl parent;
private StateBag parentViewState;
public ListDataHelper(IListControl parent, StateBag parentViewState)
{
this.parent = parent;
this.parentViewState = parentViewState;
}
public string DataMember
{
get
{
object o = parentViewState["DataMember"];
if(o != null)
return (string)o;
return String.Empty;
}
set
{
parentViewState["DataMember"] = value;
}
}
public string DataTextField
{
get
{
object o = parentViewState["DataTextField"];
if(o != null)
return (string)o;
return String.Empty;
}
set
{
parentViewState["DataTextField"] = value;
}
}
public string DataValueField
{
get
{
object o = parentViewState["DataValueField"];
if(o != null)
return (string)o;
return String.Empty;
}
set
{
parentViewState["DataValueField"] = value;
}
}
public object DataSource
{
get
{
return this.dataSource;
}
set
{
this.dataSource = value;
}
}
public int DataSourceCount
{
get
{
if(dataSourceCount == -1)
{
if(ResolvedDataSource != null)
{
if(ResolvedDataSource is ICollection)
dataSourceCount = ((ICollection)ResolvedDataSource).Count;
}
}
return dataSourceCount;
}
}
public IEnumerable ResolvedDataSource
{
get
{
if(this.resolvedDataSrc == null)
{
resolvedDataSrc = DataSourceHelper.GetResolvedDataSource(DataSource, DataMember);
}
return resolvedDataSrc;
}
}
public MobileListItemCollection Items
{
get
{
if(items == null)
{
items = new MobileListItemCollection();
if(parent.TrackingViewState)
((IStateManager)items).TrackViewState();
}
return items;
}
}
public void AddItem(MobileListItem item)
{
Items.Add(item);
}
public MobileListItem CreateItem(object dataItem)
{
MobileListItem retVal;
string itemText = null;
string itemValue = null;
if(bindFromFields)
{
if(this.dataTextField.Length > 0)
{
itemText = DataBinder.GetPropertyValue(dataItem,
dataTextField, "{0}");
}
if(this.dataValueField.Length > 0)
{
itemValue = DataBinder.GetPropertyValue(dataItem,
dataValueField, "{0}");
}
} else
{
itemText = dataItem.ToString();
}
retVal = new MobileListItem(dataItem, itemText, itemValue);
if(dataItem != null)
{
parent.OnItemDataBind(new ListDataBindEventArgs(retVal, dataItem));
}
return retVal;
}
}
}
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