feat:txt文件内容不全修改

ViewModel/Grading/GradingResultVM.cs

@@ -768,6 +768,7 @@ public class GradingResultVM : BaseViewModel
             stream.WriteLine($"TA={info.TA}");
             stream.WriteLine($"LGF={info.LGF * 100}");
             stream.WriteLine($"STAR={info.STAR * 100}");
+            stream.Close();
         }
     }
     private void ExcelFile(string filePath)