调整。

WeighAndGrading/GradeFrom.cs

@@ -72,6 +72,12 @@ namespace WeighAndGrading
       InitializeComponent();
       if (!Directory.Exists("TempImg"))
         Directory.CreateDirectory("TempImg");
+      else
+      {
+        var files = new DirectoryInfo("TempImg").GetFiles();
+        foreach (var f in files)
+          f.Delete();
+      }
 
       butcherTimeInput.Date = DateTime.Today;
       tangGridView.AutoGenerateColumns = false;