添加文件流md5计算

Infrastructure/Helpers/Md5.cs

@@ -6,6 +6,21 @@ namespace Infrastructure.Helpers
 {
     public class Md5
     {
+        /// <summary>
+        /// 计算字节流的MD5值
+        /// </summary>
+        public static string CalculateStreamMd5(Stream stream)
+        {
+            if (stream == null)
+                throw new ArgumentNullException(nameof(stream));
+
+            if (!stream.CanRead)
+                throw new InvalidOperationException("流不可读");
+
+            using var md5 = MD5.Create();
+            var hashBytes = md5.ComputeHash(stream);
+            return BitConverter.ToString(hashBytes).Replace("-", "").ToLower();
+        }
         public static string Encrypt(string str)
         {