check in display image using api now

API/FamilyTreeAPI/Repository/ImportPersonRepository.cs

@@ -37,7 +37,67 @@ public class ImportPersonRepository
         _config = config;
         _httpContext = httpContext;
     }
+    public async Task<string> GetImageAsBase64String(string imagePath)
+    {
+        try
+        {
+            // Read the image file into a byte array
+            //byte[] imageBytes = File.ReadAllBytes(imagePath);
+            byte[] imageBytes = await File.ReadAllBytesAsync(imagePath);
+            // Convert the byte array to a Base64 string
+            string base64String = Convert.ToBase64String(imageBytes);
 
+            return base64String;
+        }
+        catch (FileNotFoundException)
+        {
+            Console.WriteLine($"Error: The file at '{imagePath}' was not found.");
+            return null;
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"An error occurred: {ex.Message}");
+            return null;
+        }
+    }
+
+    public async Task<ResultModel<string>> DownloadFile(DownloadFileCriteria criteria)
+    {
+        int statusCode = -1;
+        string result = "";
+        string error = "";
+        try
+        {
+
+           
+            string imagePath = _config.GetValue<string>("AppSettings:ImageFolder");
+            string imageUrl = System.IO.Path.Combine(imagePath, criteria.FileName);
+            if (System.IO.File.Exists(imageUrl))
+            {
+                result = await this.GetImageAsBase64String(imageUrl);
+                statusCode = 1;
+            }
+            else
+            {
+                error = "error filename " + criteria.FileName + " can not find";
+                statusCode = -1;
+            }
+        }
+        catch (Exception ex)
+        {
+            statusCode = -1;
+            error = ex.Message;
+        }
+
+        return new ResultModel<string>
+            { 
+                Data = result,
+              StatusCode = statusCode, 
+              Message = error 
+        };
+
+        
+    }
     public async Task<List<CodeDto<string>>> ImportPerson(MemoryStream fileStream, string sheetName)
     {
         Dictionary<string, ImportRelation> relationDic = new();