"System.InvalidCastException: Specified cast is not valid.\r\n

bestvcboy · 10 Apr 2022, 12:28

currEle.SetValue(Canvas.LeftProperty, xpos1);

at Noesis.DependencyObject+<>c.<CreateSetFunctions>b__24_1 (System.IntPtr cPtr, System.IntPtr dp, System.Object value) [0x0000e] in G:\english\plus\NoesisGUI-Unity-3.1.4-Indie\Runtime\API\Proxies\DependencyObjectExtend.cs:428
at Noesis.DependencyObject.SetValue (Noesis.DependencyProperty dp, System.Object value) [0x0008a] in G:\english\plus\NoesisGUI-Unity-3.1.4-Indie\Runtime\API\Proxies\DependencyObjectExtend.cs:57
at UnityApp1.UnityApp1MainView.Btn_MouseMove (System.Object sender, Noesis.MouseEventArgs e) [0x000c2] in G:\english\wpftest\Assets\Scenes\UnityApp1MainView.xaml.cs:61
at Noesis.MouseEventArgs.InvokeHandler (System.Delegate handler, System.IntPtr sender, System.IntPtr args) [0x00011] in G:\english\plus\NoesisGUI-Unity-3.1.4-Indie\Runtime\API\Proxies\MouseEventArgs.cs:50
at Noesis.EventManager.InvokeHandler (System.IntPtr routedEventPtr, System.Delegate handler, System.IntPtr sender, System.IntPtr args) [0x00026] in G:\english\plus\NoesisGUI-Unity-3.1.4-Indie\Runtime\API\Core\Events.cs:578
at Noesis.EventHandlerStore.RaiseRoutedEvent (System.IntPtr cPtrType, System.IntPtr cPtr, System.IntPtr routedEvent, System.IntPtr sender, System.IntPtr e) [0x00084] in G:\english\plus\NoesisGUI-Unity-3.1.4-Indie\Runtime\API\Core\Events.cs:267

        private void Btn_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed && isMove)
            {
                FrameworkElement currEle = sender as FrameworkElement;
                var e1 = e.GetPosition(null).X;
                var e2 = e.GetPosition(null).Y;
                var c1 = currEle.GetValue(Canvas.LeftProperty);
                var c2 = currEle.GetValue(Canvas.TopProperty);
                float f1 =0;
                float f2 =0 ;
                float.TryParse(c1.ToString(), out f1);
                float.TryParse(c2.ToString(), out f2);

                double xPos = e1 - pos.X + f1;
                double yPos = e2 - pos.Y + f2;
                object xpos1 = xPos;
                object ypos1 = yPos;
                currEle.SetValue(Canvas.LeftProperty, xpos1);
                currEle.SetValue(Canvas.TopProperty, ypos1);
                pos = e.GetPosition(null);
            }

        }

11 Apr 2022, 13:19

Canvas attached properties are float in Noesis, you are setting them as a double. Please try the following code:

        private void Btn_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed && isMove)
            {
                FrameworkElement currEle = (FrameworkElement)sender;
                Point newPos = e.GetPosition(null);
                float xPos = newPos.X - pos.X + Canvas.GetLeft(currEle);
                float yPos = newPos.Y - pos.Y + Canvas.GetTop(currEle);
                Canvas.SetLeft(currEle, xpos1);
                Canvas.SetTop(currEle, ypos1);
                pos = newPos;
            }
        }

"System.InvalidCastException: Specified cast is not valid.\r\n

"System.InvalidCastException: Specified cast is not valid.\r\n

Re: "System.InvalidCastException: Specified cast is not valid.\r\n

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