update:修改项目名称从Dilon到Ewide

Api/Ewide.Core/Extension/DictionaryExtensions.cs

@@ -0,0 +1,49 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Ewide.Core
+{
+    /// <summary>
+    /// 字典扩展
+    /// </summary>
+    public static class DictionaryExtensions
+    {
+        /// <summary>
+        /// 将一个字典转化为 QueryString
+        /// </summary>
+        /// <param name="dict"></param>
+        /// <param name="urlEncode"></param>
+        /// <returns></returns>
+        public static string ToQueryString(this Dictionary<string, string> dict, bool urlEncode = true)
+        {
+            return string.Join("&", dict.Select(p => $"{(urlEncode ? p.Key?.UrlEncode() : "")}={(urlEncode ? p.Value?.UrlEncode() : "")}"));
+        }
+
+        /// <summary>
+        /// 将一个字符串 URL 编码
+        /// </summary>
+        /// <param name="str"></param>
+        /// <returns></returns>
+        public static string UrlEncode(this string str)
+        {
+            if (string.IsNullOrEmpty(str))
+            {
+                return "";
+            }
+            return System.Web.HttpUtility.UrlEncode(str, Encoding.UTF8);
+        }
+
+        /// <summary>
+        /// 移除空值项
+        /// </summary>
+        /// <param name="dict"></param>
+        public static void RemoveEmptyValueItems(this Dictionary<string, string> dict)
+        {
+            dict.Where(item => string.IsNullOrEmpty(item.Value)).Select(item => item.Key).ToList().ForEach(key =>
+            {
+                dict.Remove(key);
+            });
+        }
+    }
+}