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using System.IO;
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public partial class BookWithThemes : System.Web.UI.MasterPage
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{
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/// <summary>
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/// Upon loading,populate theme list based on themes in App_Themes folder
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/// </summary>
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protected void Page_Load(object sender, EventArgs e)
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{
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// dynamically load the drop down list only the first time
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if (!IsPostBack)
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{
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// themes must be in this location
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string path = Server.MapPath("~/App_Themes");
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// verify this location exists
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if (Directory.Exists(path))
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{
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// retrieve array of theme folder names
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String[] themeFolders = Directory.GetDirectories(path);
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// process each element in this array
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foreach (String folder in themeFolders)
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{
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// retrieve information about this folder name
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DirectoryInfo info = new DirectoryInfo(folder);
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// add this folder name to the drop-down list
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drpThemes.Items.Add(info.Name);
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}
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// once all the themes are added to the list, we must make the
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// content page's current theme the selected item in the list
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// first search the list items for the page's theme name
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ListItem item = drpThemes.Items.FindByText(Page.Theme);
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// now set the selected index of the list (i.e., select that
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// list item) to the index of the list item we just found.
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drpThemes.SelectedIndex = drpThemes.Items.IndexOf(item);
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}
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}
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}
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/// <summary>
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/// Event handler for the theme selector
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/// </summary>
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protected void drpTheme_selectedChanged(object s, EventArgs e)
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{
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//save theme in session
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string theme = drpThemes.SelectedItem.Text;
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Session["themeName"] = theme;
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//re-request page
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string page = Request.Path;
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Server.Transfer(page);
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}
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/// <summary>
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/// Property to get/set the url of the advertisement image
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/// </summary>
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public string AdImageUrl
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{
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get { return imgbtnAd.ImageUrl; }
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set { imgbtnAd.ImageUrl = value; }
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}
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/// <summary>
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/// Property to get/set the url for the link surrounding the
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/// advertisement image.
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/// </summary>
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public string AdNavigateUrl
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{
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get { return imgbtnAd.NavigateUrl; }
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set { imgbtnAd.NavigateUrl = value; }
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}
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}
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