fix: 打印调整

ViewModel/Grading/GradingResultVM.cs

@@ -37,6 +37,7 @@ using SparkClient.Model.Attributes;
 using SparkClient.Model.Common;
 using PaperSize = System.Drawing.Printing.PaperSize;
 using SharpDX.Direct2D1.Effects;
+using Exception = System.Exception;
 
 
 namespace SparkClient.ViewModel.Grading;
@@ -1997,10 +1998,19 @@ public class GradingResultVM : BaseViewModel
             
             Microsoft.Office.Interop.Excel.Workbook workbook = excelApp.Workbooks.Open(tempFilePath);
             
+            string? targetPrinter = System.Drawing.Printing.PrinterSettings.InstalledPrinters
+                .Cast<string>()
+                .FirstOrDefault(p => p.Contains(ConfigurationHelper.ReadConfigValue("PrintName")));
+            if (targetPrinter == null)
+            {
+                throw new Exception($"未找到打印机{targetPrinter}");
+            }
+
             // 打印配置
             workbook.PrintOut(
                 Copies: 1,
-                Preview: false // 禁用打印预览
+                Preview: false,
+                ActivePrinter: targetPrinter
             );
             
             // 关闭工作簿（不保存修改）