// 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.
// 

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

public partial class Default : System.Web.UI.Page
{
 
    protected void Page_Load(object sender, EventArgs e)
    {
    ScriptManager1.RegisterAsyncPostBackControl(ClearGraphicsButton);
        ClearGraphicsButton.Click +=new System.EventHandler(ClearGraphicsButton_Click);
  }

  protected void ClearGraphicsButton_Click(object sender, System.EventArgs e)
  {      
            // Get the ArcGIS Server specific MapFunctionality.  This MapFunctionality is shared between Internet and 
            // Local resource types
            ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.MapFunctionality agsMapFunctionality = (ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.MapFunctionality)(Map1.GetFunctionality("MapResourceItem0"));

            // the state of ArcGIS Server specific content for a map resource is maintained in an ArcGIS Server SOAP API 
            // MapDescription. The MapDescription.CustomGraphics property is used to define an array of SOAP API graphic 
            // elements to draw on the map generated by the map server.   In this case, we set this property to null, 
            // effectively clearing these graphic elements.
            ESRI.ArcGIS.ADF.ArcGISServer.MapDescription mapDescription = agsMapFunctionality.MapDescription;
            mapDescription.CustomGraphics = null;

            // Refresh the map and return callback results to apply the updates.
            Map1.Refresh();
            ScriptManager1.RegisterDataItem(Page, Map1.CallbackResults.ToString(), false);
        
  }
}