1

WebApi/Controllers/TransactionRecordController.cs

@@ -252,6 +252,48 @@ public class TransactionRecordController(
         }
     }
 
+    /// <summary>
+    /// 获取累积余额统计数据（用于余额卡片图表）
+    /// </summary>
+    [HttpGet]
+    public async Task<BaseResponse<List<BalanceStatisticsDto>>> GetBalanceStatisticsAsync(
+        [FromQuery] int year,
+        [FromQuery] int month
+    )
+    {
+        try
+        {
+            // 获取存款分类
+            var savingClassify = await configService.GetConfigByKeyAsync<string>("SavingsCategories");
+
+            // 获取每日统计数据
+            var statistics = await transactionRepository.GetDailyStatisticsAsync(year, month, savingClassify);
+            
+            // 按日期排序并计算累积余额
+            var sortedStats = statistics.OrderBy(s => s.Key).ToList();
+            var result = new List<BalanceStatisticsDto>();
+            decimal cumulativeBalance = 0;
+
+            foreach (var item in sortedStats)
+            {
+                decimal dailyBalance = item.Value.income - item.Value.expense;
+                cumulativeBalance += dailyBalance;
+
+                result.Add(new BalanceStatisticsDto(
+                    item.Key,
+                    cumulativeBalance
+                ));
+            }
+
+            return result.Ok();
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "获取累积余额统计失败，年份: {Year}, 月份: {Month}", year, month);
+            return $"获取累积余额统计失败: {ex.Message}".Fail<List<BalanceStatisticsDto>>();
+        }
+    }
+
     /// <summary>
     /// 获取指定月份每天的消费统计
     /// </summary>
@@ -311,7 +353,7 @@ public class TransactionRecordController(
                 s.Value.count,
                 s.Value.expense,
                 s.Value.income,
-                s.Value.income - s.Value.expense
+                s.Value.saving
             )).ToList();
 
             return result.Ok();
@@ -778,6 +820,14 @@ public record DailyStatisticsDto(
     decimal Balance
 );
 
+/// <summary>
+/// 累积余额统计DTO
+/// </summary>
+public record BalanceStatisticsDto(
+    string Date,
+    decimal CumulativeBalance
+);
+
 /// <summary>
 /// 智能分类请求DTO
 /// </summary>