/BlogEngine/DotNetSlave.BusinessLogic/Providers/XmlProvider/PingServices.cs

 1namespace BlogEngine.Core.Providers
 2{
 3    using System;
 4    using System.Collections.Specialized;
 5    using System.IO;
 6    using System.Linq;
 7    using System.Text;
 8    using System.Xml;
 9
10    /// <summary>
11    /// A storage provider for BlogEngine that uses XML files.
12    ///     <remarks>
13    /// To build another provider, you can just copy and modify
14    ///         this one. Then add it to the web.config's BlogEngine section.
15    ///     </remarks>
16    /// </summary>
17    public partial class XmlBlogProvider : BlogProvider
18    {
19        #region Public Methods
20
21        /// <summary>
22        /// Loads the ping services.
23        /// </summary>
24        /// <returns>A StringCollection.</returns>
25        public override StringCollection LoadPingServices()
26        {
27            var fileName = this.Folder + "pingservices.xml";
28            if (!File.Exists(fileName))
29            {
30                return new StringCollection();
31            }
32
33            var col = new StringCollection();
34            var doc = new XmlDocument();
35            doc.Load(fileName);
36
37            foreach (XmlNode node in
38                doc.SelectNodes("services/service").Cast<XmlNode>().Where(node => !col.Contains(node.InnerText)))
39            {
40                col.Add(node.InnerText);
41            }
42
43            return col;
44        }
45
46        /// <summary>
47        /// Saves the ping services.
48        /// </summary>
49        /// <param name="services">
50        /// The services.
51        /// </param>
52        public override void SavePingServices(StringCollection services)
53        {
54            if (services == null)
55            {
56                throw new ArgumentNullException("services");
57            }
58
59            var fileName = this.Folder + "pingservices.xml";
60
61            using (var writer = new XmlTextWriter(fileName, Encoding.UTF8))
62            {
63                writer.Formatting = Formatting.Indented;
64                writer.Indentation = 4;
65                writer.WriteStartDocument(true);
66                writer.WriteStartElement("services");
67
68                foreach (var service in services)
69                {
70                    writer.WriteElementString("service", service);
71                }
72
73                writer.WriteEndElement();
74            }
75        }
76
77        #endregion
78    }
79}