Binding an ASP.Net Control to a Collection
I am trying to use this code to bind my asp.net control to a collection. but it gives me an error that my collection is now IHierarchyEnumerable .. which I understand why too ..
StringCollection sc = pos.getAllmembers();
Menu1.DataSource = pos.getAllmembers().GetEnumerator();
Is there any way to get around this.
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2 answers
Menu control requires a collection of IHierarcyData objects in a collection that implements IHierarchicalEnumerable .
Start with the IHierarcyData class, which will store each string from the StringCollection ...
public class MyMenuItem : IHierarchyData
{
public MyMenuItem(string s)
{
Item = s;
}
public override string ToString()
{
return Item.ToString();
}
#region IHierarchyData Members
public IHierarchicalEnumerable GetChildren()
{
return null;
}
public IHierarchyData GetParent()
{
return null;
}
public bool HasChildren
{
get { return false; }
}
public object Item
{
get; set;
}
public string Path
{
get { return string.Empty; }
}
public string Type
{
get { return string.Empty; }
}
#endregion
}
Create a class to be a collection ...
public class MyMenu : StringCollection, IHierarchicalEnumerable
{
List<IHierarchyData> _list = new List<IHierarchyData>();
public void Add(StringCollection strings)
{
foreach (string s in strings)
{
MyMenuItem i = new MyMenuItem(s);
_list.Add(i);
}
}
#region IHierarchicalEnumerable Members
public IHierarchyData GetHierarchyData(object enumeratedItem)
{
return enumeratedItem as IHierarchyData;
}
#endregion
#region IEnumerable Members
public System.Collections.IEnumerator GetEnumerator()
{
return _list.GetEnumerator();
}
#endregion
}
On the page you can now create a menu ...
MyMenu pos = new MyMenu();
StringCollection sc = new StringCollection();
sc.Add("First");
sc.Add("Second");
pos.Add(sc);
Menu1.DataSource = pos;
Menu1.DataBind();
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You can try to overlay a wrapper like in this msdn article:
http://msdn.microsoft.com/en-us/library/system.web.ui.ihierarchicalenumerable.aspx
public class StringHeirarchy : StringCollection,IHierarchyEnumerable
{
public IHierarchyData GetHierarchyData(object enumeratedItem)
{
return enumeratedItem as IHierarchyData;
}
}
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