* IniFileEx: 增加两个函数

SunnyUI/Common/UFile.cs

@@ -26,6 +26,7 @@ using System.Globalization;
 using System.IO;
 using System.IO.Compression;
 using System.Linq;
+using System.Text;
 using System.Windows.Forms;
 
 namespace Sunny.UI
@@ -785,6 +786,25 @@ namespace Sunny.UI
 
             return true;
         }
+
+        /// <summary>
+        /// 获取文件的Encoding
+        /// </summary>
+        private static Encoding GetEncoding(string filename)
+        {
+            // This is a direct quote from MSDN:  
+            // The CurrentEncoding value can be different after the first
+            // call to any Read method of StreamReader, since encoding
+            // autodetection is not done until the first call to a Read method.
+
+            using (var reader = new StreamReader(filename, Encoding.Default, true))
+            {
+                if (reader.Peek() >= 0) // you need this!
+                    reader.Read();
+
+                return reader.CurrentEncoding;
+            }
+        }
     }
 
     /// <summary>

SunnyUI/Common/UIniFileEx.cs

@@ -261,6 +261,18 @@ namespace Sunny.UI
             sw.Flush();
         }
 
+        public bool HasSection(string section)
+        {
+            return data.ContainsKey(section.ToLowerInvariant());
+        }
+
+        public bool HasKey(string section, string key)
+        {
+            return
+                data.ContainsKey(section) &&
+                !string.IsNullOrEmpty(data[section][key]);
+        }
+
         /// <summary>
         /// 写结构
         /// </summary>