.

WeighAndGrading/GradeFrom.cs

@@ -185,7 +185,7 @@ namespace WeighAndGrading
 
         btn.Click += (sender, e) =>
         {
-          JiBieButtonClick(btn);
+          JiBieButtonClick(sender as Button);
         };
         if (item.Item3 == TANG_TECH)
         {