添加一个下载文件的接口

24Hour/Controllers/Common/CommonController.cs

@@ -2739,7 +2739,18 @@ namespace _24Hour.Controllers.Common
         #endregion
 
         #region 文件上传
+        [HttpPost]
+        [Route("RequestDownloadFile")]
+        public IActionResult RequestDownloadFile(string filename) //[FromBody] dynamic Json
+        {
+
+            var FileName = System.IO.Path.GetFileName(filename);
+            var currentDate = DateTime.Now;
 
+            var FilePath = filename;
+
+            return new FileStreamResult(new FileStream(FilePath, FileMode.Open), "application/octet-stream") { FileDownloadName = FileName };
+        }
         private string[] AllowedExtensions = new string[] { ".png", ".jpg", ".jpeg", ".bmp",".xlsx",".aks"};
         /// <summary>
         /// 文件上传--附件