locationdropdown.ascx.cs

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using System;
using System.Collections.Generic;
using System.Web.UI.WebControls;

using AspNet.StarterKits.Classifieds.Web;

public partial class LocationDropDown_ascx : System.Web.UI.UserControl
{
	private bool _isDatabound;

	private const string OtherLocationText = "Other Location...";
	private const string AnyLocationText = "Any Location";

	private bool _showAnyLocationChoice = false;

	private string _currentLocation = null;

	public bool ShowAnyLocationChoice
	{
		get
		{
			return _showAnyLocationChoice;
		}
		set
		{
			if (value != _showAnyLocationChoice)
			{
				_showAnyLocationChoice = value;
				Refresh();
			}
		}
	}

	public string CurrentLocation
	{
		get
		{
			if (!OtherLocationTextBox.Text.Equals(String.Empty) || LocationList.SelectedIndex == OtherLocationItemIndex)
			{
				return OtherLocationTextBox.Text;
			}
			else
			{
				return LocationList.SelectedValue;
			}
		}
		set
		{
			SetCurrentLocation(value);
		}
	}

	private int OtherLocationItemIndex
	{
		get
		{
			// the "Other Location..." item is always last
			return LocationList.Items.Count - 1;
		}
	}

	protected void LocationList_DataBound(object sender, EventArgs e)
	{
		if (_showAnyLocationChoice)
		{
			ListItem anyLocation = new ListItem(AnyLocationText, String.Empty);
			LocationList.Items.Insert(0, anyLocation);
		}

		ListItem otherLocation = new ListItem(OtherLocationText, OtherLocationText);
		LocationList.Items.Insert(LocationList.Items.Count, otherLocation);

		_isDatabound = true;
		SetCurrentLocation(_currentLocation);


	}

	public void Reset()
	{
		_currentLocation = null;
		OtherLocationTextBox.Text = String.Empty;
	}
	public void Refresh()
	{
		_isDatabound = false;
		DataBind();
	}

	public override void DataBind()
	{
		if (_isDatabound)
			return;
		else
		{
			base.DataBind();
		}
	}

	private void SetCurrentLocation(string location)
	{
		if (location == null || location.Equals(String.Empty))
			return;
		else
			_currentLocation = location;

		if (!_isDatabound)
			return;

		ListItem currentSelection = LocationList.SelectedItem;
		ListItem predefinedLocation = LocationList.Items.FindByValue(location);
		if (predefinedLocation != null)
		{
			if (currentSelection != null)
				currentSelection.Selected = false;

			predefinedLocation.Selected = true;

			OtherLocationPanel.Visible = false;
		}
		else
		{
			OtherLocationPanel.Visible = true;
			OtherLocationTextBox.Text = location;
			LocationList.SelectedIndex = OtherLocationItemIndex;
		}
	}
	protected void LocationsDataSource_Selected(object sender, ObjectDataSourceStatusEventArgs e)
	{
		string _previousLocation = CurrentLocation;
		List<CachedLocation> locations = e.ReturnValue as List<CachedLocation>;
		if (locations != null && locations.Count > 0)
		{
			LocationList.Visible = true;
			OtherLocationPanel.Visible = false;
		}
		else
		{
			LocationList.Visible = false;
			OtherLocationPanel.Visible = true;
			OtherLabel.Visible = false;
		}
		CurrentLocation = _previousLocation;
	}
	protected void LocationList_SelectedIndexChanged(object sender, EventArgs e)
	{
		OtherLocationTextBox.Text = String.Empty;
		if (LocationList.SelectedIndex == OtherLocationItemIndex)
		{
			OtherLocationPanel.Visible = true;
		}
		else
		{
			OtherLocationPanel.Visible = false;
		}
	}

}