// auxiliary code for multipage nav demo

void Page_Load ( Object source, EventArgs e ) {
   if ( ! IsPostBack ) {
      gvCities.SelectedIndex = 0;
      gvCities.DataBind ( );
      getSelected ( null, null );
   }
}

void getSelected ( Object src, EventArgs e ) {
   DataKey keys = gvCities.SelectedDataKey;
   string country = keys [ 0 ].ToString ( );
   string state = keys [ 1 ].ToString ( );
   string city = keys [ 2 ].ToString ( );
   ViewState [ "destination" ] = city + ", " + getCountry ( country );

   // bind destination images
   string query = "SELECT Top 18 Caption, ThumbnailUrl, Url FROM DestImages WHERE Country = '" + country + 
      ( state != "" ? "' and StateProvince = '" + state : "" ) + 
      "' and City = '" + city + "' ORDER BY Caption";
   lstImages.DataSource = fetchReader ( query );
   lstImages.DataBind ( );
   mvImages.ActiveViewIndex = 0;
}

void resetSelected ( Object src, EventArgs e ) {
   gvCities.SelectedIndex = 0;
   gvCities.DataBind ( );
   getSelected ( null, null );
}

void showViewThumbs ( object src, EventArgs e ) {
   mvImages.SetActiveView ( viewThumbs );
}

void showViewZoom ( object src, DataListCommandEventArgs e ) {
   string query = "SELECT Caption, ShortDesc, Url, Width, Credit, CreditLink, Supplier FROM DestImages WHERE Url = '" + e.CommandArgument + "'";
   fvZoom.DataSource = fetchReader ( query );
   fvZoom.DataBind ( );
   mvImages.SetActiveView ( viewZoom );
}

void setImages ( object src, DataListItemEventArgs e ) {
   // handles the onItemDataBound event of the destImages datalist
   if ( e.Item.ItemType == ListItemType.Item ||
         e.Item.ItemType == ListItemType.AlternatingItem ) {

      // set reference to current data record
      IDataRecord dataRow = ( IDataRecord ) e.Item.DataItem;

      ImageButton imgThumb = ( ImageButton ) e.Item.FindControl ( "imgThumb" );
      imgThumb.ImageUrl = dataRow [ "ThumbnailUrl" ].ToString ( ).StartsWith ( "http" ) ?
         dataRow [ "ThumbnailUrl" ].ToString ( ) :
         string.Format ( "http://images.travelnow.com/{0}", dataRow [ "ThumbnailUrl" ] );
      imgThumb.CommandArgument = dataRow [ "Url" ].ToString ( ).StartsWith ( "http" ) ?
         dataRow [ "Url" ].ToString ( ) :
         string.Format ( "http://images.travelnow.com/{0}", dataRow [ "Url" ] );

      string caption = dataRow [ "Caption" ].ToString ( );
      imgThumb.ToolTip = caption;
      imgThumb.AlternateText = caption;
      imgThumb.Attributes [ "onMouseOver" ] = "status='" +
         ViewState [ "destination" ].ToString ( ).Replace ( "'", "\\'" ) +
         " " + caption.Replace ( "'", "\\'" ) + "';return true";
   }
}

void getZoom ( Object src, EventArgs e ) {
   FormView fvZoom = ( FormView ) src;
   if ( fvZoom.DataItemCount > 0 ) {
      // set reference to current data record
      IDataRecord dataRow = ( IDataRecord ) fvZoom.DataItem;
   
      string imgUrl = "", imgCaption = "", imgCredit = "", imgCreditLink = "", imgSupplier = "";
      int w = 0;

      imgUrl = dataRow [ "Url" ].ToString ( );
      imgUrl = imgUrl.StartsWith ( "http" ) ? imgUrl :
         string.Format ( "http://images.travelnow.com/{0}", imgUrl );
      w = Convert.ToInt32 ( dataRow [ "Width" ] );
   
      imgCaption = dataRow [ "shortdesc" ].ToString ( );
      imgCredit = dataRow [ "credit" ].ToString ( );
      imgCreditLink = dataRow [ "creditlink" ].ToString ( );
      imgSupplier = dataRow [ "supplier" ].ToString ( );

      Label lblCaption = ( Label ) fvZoom.FindControl ( "lblCaption" );
      lblCaption.Text = imgCaption;

      ImageButton imgZoom = ( ImageButton ) fvZoom.FindControl ( "imgZoom" );
      imgZoom.ImageUrl = imgUrl.Contains ( "wiki" ) && w > 800 ? 
         imgUrl.Replace ( "/commons/", "/commons/thumb/" ).Replace ( "/en/", "/en/thumb/" ) + 
         "/800px-" + imgUrl.Substring ( imgUrl.LastIndexOf ( "/" ) + 1 ) : imgUrl;
      if ( ! ( imgUrl.Contains ( "wiki" ) && w > 800 ) ) imgZoom.Width = 800;
      imgZoom.ToolTip = dataRow [ "Caption" ].ToString ( );
      imgZoom.AlternateText = dataRow [ "Caption" ].ToString ( );

      Panel imgCredits = ( Panel ) fvZoom.FindControl ( "imgCredits" );
      if ( imgCredit != "" ) {
         Label lblPrefix = new Label ( );
         lblPrefix.Text = "Photography: ";
         imgCredits.Controls.Add ( lblPrefix );

         if ( imgCreditLink != "" ) {
            HyperLink lnkCredits = new HyperLink ( );
            lnkCredits.Text = imgCredit;
            lnkCredits.NavigateUrl = imgCreditLink;
            lnkCredits.Target = "credits";
            imgCredits.Controls.Add ( lnkCredits );
         }
         else {
            Label lblCredits = new Label ( );
            lblCredits.Text = imgCredit;
            imgCredits.Controls.Add ( lblCredits );
         }

         Label lblSuffix = new Label ( );
         lblSuffix.Text = "   ";
         imgCredits.Controls.Add ( lblSuffix );
      }
      else {
         Label lblPad = new Label ( );
         lblPad.Text = "  ";
         imgCredits.Controls.Add ( lblPad );
      }
      Label lblSource = new Label ( );
      lblSource.Text = "Source: " + imgSupplier;
      imgCredits.Controls.Add ( lblSource );
   }
}

string getCountry ( string countryCode ) {
   return Convert.ToString ( fetchScalar ( "SELECT CountryName FROM Countries WHERE CountryCode = '" +
      countryCode + "'" ) );
}