From eafce7e20f3414d47a1cff5796b41084072862f0 Mon Sep 17 00:00:00 2001
From: df123 <hws184433274hws@live.com>
Date: Tue, 5 May 2026 23:20:30 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=20PrizegradesItemDto.?=
 =?UTF-8?q?Type=20=E7=9A=84=20JsonConverter=20=E8=BF=90=E8=A1=8C=E6=97=B6?=
 =?UTF-8?q?=E7=B1=BB=E5=9E=8B=E4=B8=8D=E5=85=BC=E5=AE=B9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- IntToStringConverter 继承 JsonConverter<int> 但 Type 属性是 string 类型，运行时报错
- 创建 FlexibleStringConverter (JsonConverter<string?>) 替代，支持 JSON Number/String/Null 统一转为 string
---
 .../DTOs/Lottery/PrizegradesItemDto.cs        |  2 +-
 .../Infrastructure/FlexibleStringConverter.cs | 28 +++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 src/DFApp.Web/Infrastructure/FlexibleStringConverter.cs

diff --git a/src/DFApp.Web/DTOs/Lottery/PrizegradesItemDto.cs b/src/DFApp.Web/DTOs/Lottery/PrizegradesItemDto.cs
index 5754551e..d639c987 100644
--- a/src/DFApp.Web/DTOs/Lottery/PrizegradesItemDto.cs
+++ b/src/DFApp.Web/DTOs/Lottery/PrizegradesItemDto.cs
@@ -7,7 +7,7 @@ public class PrizegradesItemDto
     {
 
         [JsonPropertyName("type")]
-        [JsonConverter(typeof(IntToStringConverter))]
+        [JsonConverter(typeof(FlexibleStringConverter))]
         public string? Type { get; set; }
 
         [JsonPropertyName("typenum")]
diff --git a/src/DFApp.Web/Infrastructure/FlexibleStringConverter.cs b/src/DFApp.Web/Infrastructure/FlexibleStringConverter.cs
new file mode 100644
index 00000000..2af1d414
--- /dev/null
+++ b/src/DFApp.Web/Infrastructure/FlexibleStringConverter.cs
@@ -0,0 +1,28 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace DFApp.Web.Infrastructure
+{
+    /// <summary>
+    /// 灵活的字符串转换器，能将 JSON 中的数字和字符串都转换为 C# string
+    /// </summary>
+    public class FlexibleStringConverter : JsonConverter<string?>
+    {
+        public override string? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.String)
+                return reader.GetString();
+            if (reader.TokenType == JsonTokenType.Number)
+                return reader.GetInt32().ToString();
+            if (reader.TokenType == JsonTokenType.Null)
+                return null;
+            throw new JsonException($"意外的 JSON 令牌类型: {reader.TokenType}，期望字符串、数字或null。");
+        }
+
+        public override void Write(Utf8JsonWriter writer, string? value, JsonSerializerOptions options)
+        {
+            writer.WriteStringValue(value);
+        }
+    }
+}