后台数据表建立

20220330_Vote/Ewide.Core/Util/RandomHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Ewide.Core.Util
+{
+    public class RandomHelper
+    {
+        private const string BASECODE = "ABCDEFGHJKLMNPQRSTUVWXYZ0123456789";
+        /// <summary>
+        ///生成指定位数的随机码（数字）
+        /// </summary>
+        /// <param name="length"></param>
+        /// <returns></returns>
+        public static string GenerateRandomCode(int length)
+        {
+            var result = new StringBuilder();
+            for (var i = 0; i < length; i++)
+            {
+                var r = new Random(Guid.NewGuid().GetHashCode());
+                result.Append(BASECODE[r.Next(BASECODE.Length)]);
+            }
+            return result.ToString();
+        }
+    }
+}