demo

RfidWeb/Frm/UserAlarmShow.cs

@@ -73,13 +73,21 @@ namespace RfidWeb.Frm
                 });
             }
             this.Invoke(() =>
+            {
+                try
                 {
                     int currentFirstVisibleRowIndex = dataGridView1.FirstDisplayedScrollingRowIndex;
                     this.dataGridView1.DataSource = lsList;
-                if (currentFirstVisibleRowIndex > 0)
+                    if (currentFirstVisibleRowIndex >= 0 && currentFirstVisibleRowIndex < dataGridView1.Rows.Count)
                     {
                         dataGridView1.FirstDisplayedScrollingRowIndex = currentFirstVisibleRowIndex;
                     }
+                }
+                catch (Exception e)
+                {
+                    Console.WriteLine(e);
+                    
+                }
             });
         }
 
@@ -98,13 +106,20 @@ namespace RfidWeb.Frm
                 });
             }
             this.Invoke(() =>
+            {
+                try
                 {
                     int currentFirstVisibleRowIndex = dataGridView2.FirstDisplayedScrollingRowIndex;
                     this.dataGridView2.DataSource = lsList;
-                if (currentFirstVisibleRowIndex > 0)
+                    if (currentFirstVisibleRowIndex >= 0 && currentFirstVisibleRowIndex < dataGridView2.Rows.Count)
                     {
                         dataGridView2.FirstDisplayedScrollingRowIndex = currentFirstVisibleRowIndex;
                     }
+                }
+                catch (Exception e)
+                {
+                   Console.WriteLine(e.Message);
+                }
             });
         }