初始化

bin/aliyun-log-csharp-sdk-master/SLSSDK/Common/Utilities/EnumUtils.cs

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+/*
+ * Copyright (C) Alibaba Cloud Computing
+ * All rights reserved.
+ * 
+ * 版权所有 （C）阿里云计算有限公司
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+
+namespace Aliyun.Api.LOG.Common.Utilities
+{
+    /// <summary>
+    /// Description of EnumUtils.
+    /// </summary>
+    internal static class EnumUtils
+    {
+        private static IDictionary<Enum, StringValueAttribute> _stringValues =
+            new Dictionary<Enum, StringValueAttribute>();
+
+        public static string GetStringValue(this Enum value)
+        {
+            string output = null;
+            Type type = value.GetType();
+
+            if (_stringValues.ContainsKey(value))
+            {
+                output = (_stringValues[value] as StringValueAttribute).Value;
+            }
+            else
+            {
+                FieldInfo fi = type.GetField(value.ToString());
+                StringValueAttribute[] attrs =
+                    fi.GetCustomAttributes(typeof (StringValueAttribute),
+                                           false) as StringValueAttribute[];
+                if (attrs.Length > 0)
+                {
+                    output = attrs[0].Value;
+                    // Put it in the cache.
+                    lock(_stringValues)
+                    {
+                        // Double check
+                        if (!_stringValues.ContainsKey(value))
+                        {
+                            _stringValues.Add(value, attrs[0]);
+                        }
+                    }
+                }
+                else
+                {
+                    return value.ToString();
+                }
+            }
+
+            return output;
+        }
+    }
+}