zcm

asg_form/Controllers/login.cs

@@ -241,16 +241,12 @@ namespace asg_form.Controllers
                 var captchaService = new CaptchaService();
                 var (captchaImage, captchaCode) = captchaService.GenerateCaptcha();
                 captchaNow=captchaCode;
-                /*var offTime = new DateTime();
+                var offTime = new DateTime();
                 using (var db = new TestDbContext())
                 {
+                    
                     var query = db.T_captcha_check.AsQueryable();
                     var currentDateTime = DateTime.Now; 
-                    var fiveMinutesAgo = currentDateTime.AddMinutes(-5);
-                    var recordsToDelete = db.T_captcha_check
-                        .Where(x => DateTime.TryParse(x.off_time,out offTime) && offTime < fiveMinutesAgo)
-                        .ToList();
-                    db.T_captcha_check.RemoveRange(recordsToDelete);
                     int maxId = query.Max(n => n.id);
                     var msg = new capData
                     {
@@ -260,8 +256,8 @@ namespace asg_form.Controllers
                     };
                     db.Add(msg);
                     db.SaveChanges();
-                }*/
-                return Ok(new { code = 200, captchaImage ,captchaCode});
+                }
+                return Ok(new { code = 200, captchaImage});
             }
             catch (Exception ex) {
                 return Ok(new { code = 500, message = "服务器错误", ex });

asg_form/Controllers/prerfunctions/Draw.cs

@@ -2,49 +2,63 @@
 using System.Drawing;
 using System.Drawing.Imaging;
 using System.IO;
+using SkiaSharp;
+using System.IO;
 
 public class CaptchaService
 {
     public string generatedCaptchaCode;
     public int wrp = 0;
     // 生成验证码图像并返回Base64字符串
-    public (string captchaImage, string captchaCode) GenerateCaptcha()
+
+
+public (string captchaImage, string captchaCode) GenerateCaptcha()
+{
+    string wp = "123";
+    try
     {
-        string wp = "123";
-        try
+        string generatedCaptchaCode = GenerateRandomCode(4); // 生成4位随机字符
+        int width = 100, height = 40;
+            
+        using (var bitmap = new SKBitmap(width, height))
         {
-            System.AppContext.SetSwitch("System.Drawing.EnableUnixSupport", true);
-            string generatedCaptchaCode = GenerateRandomCode(4); // 生成4位随机字符
-            Bitmap bitmap = new Bitmap(100, 40);
-            wp = "122";
-            using (Graphics g = Graphics.FromImage(bitmap))
+                wp = "111";
+            using (var canvas = new SKCanvas(bitmap))
             {
-                g.Clear(Color.White);
-                using (Font font = new Font("Arial", 20))
+                    wp = "333";
+                canvas.Clear(SKColors.White);
+                using (var paint = new SKPaint())
                 {
-                    g.DrawString(generatedCaptchaCode, font, Brushes.Black, 10, 10);
+                    paint.Color = SKColors.Black;
+                    paint.TextSize = 20;
+                    paint.IsAntialias = true;
+                    canvas.DrawText(generatedCaptchaCode, 10, 30, paint);
                 }
             }
-            wp = "233";
-            using (MemoryStream ms = new MemoryStream())
+                wp = "222";
+            using (var image = SKImage.FromBitmap(bitmap))
+            using (var data = image.Encode(SKEncodedImageFormat.Png, 100))
+            using (var ms = new MemoryStream())
             {
-                bitmap.Save(ms, ImageFormat.Png);
+                data.SaveTo(ms);
                 string base64Image = Convert.ToBase64String(ms.ToArray());
                 return (base64Image, generatedCaptchaCode);
             }
         }
-        catch (Exception ex)
-        {
-            Console.WriteLine($"Error generating captcha: {ex.Message}");
-            return (ex.Message, wp);
-        }
     }
+    catch (Exception ex)
+    {
+        Console.WriteLine($"Error generating captcha: {ex.Message}");
+        return (ex.Message, wp);
+    }
+}
 
 
 
 
-    // 生成随机字符
-    private string GenerateRandomCode(int length)
+
+// 生成随机字符
+private string GenerateRandomCode(int length)
     {
         const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ012345689";
         Random random = new Random();

asg_form/Program.cs

@@ -80,8 +80,6 @@ options.AddDefaultPolicy(builder => builder.WithOrigins(urls)
 
 
 
-
-
 IServiceCollection services = builder.Services;
 
 
@@ -160,7 +158,7 @@ app.UseKnife4UI(c =>
 });
 
 app.UseStaticFiles();
-
+AppContext.SetSwitch("System.Drawing.EnableUnixSupport", true);
 
 
 //发布时服务器注册静态资源
@@ -242,4 +240,5 @@ new Thread(o =>
 { IsBackground = true }.Start();
 
 
+
 app.Run();

asg_form/asg_form.csproj

@@ -65,10 +65,15 @@
 
     <PackageReference Include="Panda.SimpleExcel" Version="1.3.2" />
     <PackageReference Include="RestSharp" Version="106.12.0" />
+    <PackageReference Include="SkiaSharp" Version="2.88.8" />
+    <PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="2.88.8" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
+    <PackageReference Include="System.Drawing.Common" Version="7.0.0" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.1.0" />
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
     <PackageReference Include="Zack.EventBus" Version="1.1.3" />
+	  <PackageReference Include="System.Drawing.Common" Version="7.0.0" />
+
   </ItemGroup>
 
   <ItemGroup>