// Copyright 2010 ESRI
// 
// All rights reserved under the copyright laws of the United States
// and applicable international laws, treaties, and conventions.
// 
// You may freely redistribute and use this sample code, with or
// without modification, provided you include the original copyright
// notice and use restrictions.
// 
// See the use restrictions.
// 

public partial class _SetMapTipsLayer : System.Web.UI.Page 
{
    protected void Page_Load(object sender, System.EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            // Retrieve the Web ADF DropDownBox that we wish to populate with layer names
            ESRI.ArcGIS.ADF.Web.UI.WebControls.DropDownBox dropDownBox = Toolbar1.ToolbarItems.Find("DropDownBox0")
                as ESRI.ArcGIS.ADF.Web.UI.WebControls.DropDownBox;

            // Make sure the DropDownBox is empty and add an item instructing the user to select a layer
            dropDownBox.Items.Clear();
            dropDownBox.Items.Add(new System.Web.UI.WebControls.ListItem("- Select MapTips Layer -"));

            // Loop through the available resources, adding the layer names of each to the DropDownBox
            foreach (ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem resourceItem in MapResourceManager1.ResourceItems)
            {
                // If the resource item refers to a graphics resource, skip to the next
                if (resourceItem.Resource is ESRI.ArcGIS.ADF.Web.DataSources.Graphics.MapResource)
                    continue;

                // Get the map functionality for the current resource
                ESRI.ArcGIS.ADF.Web.DataSources.IMapFunctionality commonMapFunctionality = 
                    Map1.GetFunctionality(resourceItem.Name);

                // Get the names and ids of the layers contained in the current resource
                string[] layerIDs = null;
                string[] layerNames = null;
                commonMapFunctionality.GetLayers(out layerIDs, out layerNames);

                // Loop through the layer names and IDs adding each to the DropDownBox
                for (int i = 0; i < layerNames.Length; i++)
                {
                    // Create a string containing the current resource name and current layer ID, delimited by a colon
                    string resourceAndLayerID = string.Format("{0}:{1}", resourceItem.Name, layerIDs[i]);

                    // Create a list item with the current layer name as the text and the resource name and layer ID
                    // as the value.  This will allow the DropDownBox's ServerAction implementation easy access to the
                    // layer ID and name of the parent resource item.
                    System.Web.UI.WebControls.ListItem listItem = 
                        new System.Web.UI.WebControls.ListItem(layerNames[i], resourceAndLayerID);

                    // Add the item to the DropDownBox
                    dropDownBox.Items.Add(listItem);
                }

            }
        }
    }
}