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Moving picture box fast causes flickering C# [closed]

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I'm trying to move a picture box fast as it is representing a bullet. However, there is a flickering effect and it obscures the image and it is very hard to see the bullet move. I have tried to use double buffering and Invalidating the picture box before its moved but to no avail. Any suggestions? Maybe im using double buffering wrong? (I have it set to be enabled when the form is loaded.)
Code
On the Form:
public void Shoot(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
PictureBox bulletImage = new PictureBox();
DoubleBuffered = true;
StandardBullet bullet = new StandardBullet(PB_CHARA.Location.X, PB_CHARA.Location.Y, FRM_GAME.MousePosition.X, FRM_GAME.MousePosition.Y, this.ClientRectangle, bulletImage);
Controls.Add(bulletImage);
}
}
Within the Standard Bullet class:
public class StandardBullet
{
public string ImageName = "DataBaseMod.Properties.Resources.StandardBullet_3x";
public int sizeX = 15;
public int sizeY = 19;
public int x = 0;
public int y = 0;
int charaPostitionX;
int charaPostitionY;
PictureBox bulletPoint;
public int[] vector = new int[2];
private System.Timers.Timer bulletTimer;
private System.Timers.Timer RemoveTimer;
System.Drawing.Rectangle FRMBounds;
//public delegate void UpdateControlsDelegate();
public StandardBullet(int charaPostiX, int charaPostiY, int MousePostiX, int MousePostiY, System.Drawing.Rectangle FRMboundaries, PictureBox bulletImage)
{
FRMBounds = FRMboundaries;
bulletPoint = bulletImage;
bulletPoint.Name = ImageName;
string filename = ImageName;
bulletPoint.BackgroundImage = DataBaseMod.Properties.Resources.StandardBullet_3x;
var size = new System.Drawing.Size(sizeX, sizeY);
bulletPoint.Size = size;
bulletPoint.BackgroundImageLayout = ImageLayout.Stretch;
charaPostitionX = charaPostiX;
charaPostitionY = charaPostiY;
x = charaPostiX;
y = charaPostiY;
vector[0] = charaPostiX - MousePostiX;
vector[1] = charaPostiY - MousePostiY;
vectorCalc();
bulletTimer = new System.Timers.Timer(10);
RemoveTimer = new System.Timers.Timer(100);
bulletTimer.Elapsed += TickHandler;
bulletTimer.AutoReset = true;
bulletTimer.Enabled = true;
RemoveTimer.Elapsed += removeTickHandler;
RemoveTimer.Enabled = true;
RemoveTimer.AutoReset = true;
}
public void TickHandler(object sender, ElapsedEventArgs e)
{
x = x + vector[0];
y = y + vector[1];
moveBullet();
}
public void removeTickHandler(object sender, ElapsedEventArgs e)
{
RemoveBullet();
}
public void moveBullet()
{
bulletPoint.BeginInvoke(new MethodInvoker(() => { bulletPoint.Location = new System.Drawing.Point(x, y); }));
}
public void vectorCalc()
{
if (vector[0] >= 1)
{
vector[0] = -10;
}
else if (vector[0] <= -1)
{
vector[0] = 10;
}
if (vector[1] >= 1)
{
vector[1] = -10;
}
else if (vector[1] <= -1)
{
vector[1] = 10;
}
}
public void RemoveBullet()
{
if (
(FRMBounds.Left >= bulletPoint.Bounds.Left) ||
( FRMBounds.Right <= bulletPoint.Bounds.Right) ||
(FRMBounds.Top >= bulletPoint.Bounds.Top) ||
(FRMBounds.Bottom <= bulletPoint.Bounds.Bottom)
)
{
Death();
return;
}
}
public void Death()
{
try
{
bulletTimer.Enabled = false;
bulletPoint.Invoke(new MethodInvoker(() => { FRM_GAME.KillBullet(bulletPoint); }));
RemoveTimer.Enabled = false;
}
catch(Exception e)
{
}
}
}
Thanks!
EDIT: I am going to remove this as i think the error may have been casued by my computer. I had two other games running whilst this one and i think this may have caused the poor rendering. Ran my code this morning and everything is fine. Sorry for this.

Using WinForms for dynamic graphics purposes is not a good idea. Instead of controls, try using Graphics and draw desired object on form (or panel or anywhere you want to).

CS1061 error Xamarin/Visual Studio

I am trying to run some source code that I downloaded from here
This is essentially an app that will allow users to manage contacts and calendar appointments etc.
I am currently experiencing 3 errors, all seemingly related...
CS1061 - UIImageView does not contain a definition for 'SetImage' and no extension method 'SetImage' accepting a first argument of type 'UIImageView' could be found (are you missing a using directive or an assembly reference?)
It seems that SetImage is not defined somewhere?
Would someone be able to tell me what i need to do to resolve the error. I post my code below...
using System;
using Foundation;
using UIKit;
using System.CodeDom.Compiler;
using MessageUI;
using Microsoft.Office365.OutlookServices;
using FiveMinuteMeeting.Shared.ViewModels;
using CoreGraphics;
using FiveMinuteMeeting.Shared;
namespace FiveMinuteMeeting.iOS
{
partial class ContactDetailViewController : UIViewController
{
public ContactDetailViewController(IntPtr handle)
: base(handle)
{
}
public DetailsViewModel ViewModel
{
get;
set;
}
UIBarButtonItem save;
public override void ViewDidLoad()
{
base.ViewDidLoad();
NavigationController.NavigationBar.BarStyle = UIBarStyle.Black;
save = new UIBarButtonItem(UIBarButtonSystemItem.Save,
async (sender, args) =>
{
ViewModel.FirstName = TextFirst.Text.Trim();
ViewModel.LastName = TextLast.Text.Trim();
ViewModel.Email = TextEmail.Text.Trim();
ViewModel.Phone = TextPhone.Text.Trim();
//BigTed.BTProgressHUD.Show("Saving contact...");
await ViewModel.SaveContact();
//BigTed.BTProgressHUD.Dismiss();
NavigationController.PopToRootViewController(true);
});
TextEmail.ShouldReturn += ShouldReturn;
TextFirst.ShouldReturn += ShouldReturn;
TextPhone.ShouldReturn += ShouldReturn;
TextLast.ShouldReturn += ShouldReturn;
TextEmail.ValueChanged += (sender, args) =>
{
ImagePhoto.SetImage(
url: new NSUrl(Gravatar.GetURL(TextEmail.Text, 172)),
placeholder: UIImage.FromBundle("missing.png")
);
};
var color = new CGColor(17.0F / 255.0F, 113.0F / 255.0F, 197.0F / 255F);
TextEmail.Layer.BorderColor = color;
TextFirst.Layer.BorderColor = color;
TextPhone.Layer.BorderColor = color;
TextLast.Layer.BorderColor = color;
ButtonCall.Clicked += (sender, args) => PlaceCall();
NSNotificationCenter.DefaultCenter.AddObserver
(UIKeyboard.DidShowNotification, KeyBoardUpNotification);
// Keyboard Down
NSNotificationCenter.DefaultCenter.AddObserver
(UIKeyboard.WillHideNotification, KeyBoardDownNotification);
double min = Math.Min((float)ImagePhoto.Frame.Width, (float)ImagePhoto.Frame.Height);
ImagePhoto.Layer.CornerRadius = (float)(min / 2.0);
ImagePhoto.Layer.MasksToBounds = false;
ImagePhoto.Layer.BorderColor = new CGColor(1, 1, 1);
ImagePhoto.Layer.BorderWidth = 3;
ImagePhoto.ClipsToBounds = true;
}
public override void ViewWillAppear(bool animated)
{
base.ViewWillAppear(animated);
if (ViewModel == null)
{
ViewModel = new DetailsViewModel();
NavigationItem.RightBarButtonItem = save;
}
else
{
this.Title = ViewModel.FirstName;
TextEmail.Text = ViewModel.Email;
TextFirst.Text = ViewModel.FirstName;
TextLast.Text = ViewModel.LastName;
TextPhone.Text = ViewModel.Phone;
ImagePhoto.SetImage(
url: new NSUrl(Gravatar.GetURL(ViewModel.Contact.EmailAddresses[0].Address, 172)),
placeholder: UIImage.FromBundle("missing.png")
);
NavigationItem.RightBarButtonItem = null;
}
}
private bool ShouldReturn(UITextField field)
{
field.ResignFirstResponder();
return true;
}
private void PlaceCall()
{
var alertPrompt = new UIAlertView("Dial Number?",
"Do you want to call " + TextPhone.Text + "?",
null, "No", "Yes");
alertPrompt.Dismissed += (sender, e) =>
{
if ((int)e.ButtonIndex >= (int)alertPrompt.FirstOtherButtonIndex)
{
var url = new NSUrl("tel:" + TextPhone.Text);
if (!UIApplication.SharedApplication.OpenUrl(url))
{
var av = new UIAlertView("Not supported",
"Scheme 'tel:' is not supported on this device",
null,
"OK",
null);
av.Show();
}
else
{
UIApplication.SharedApplication.OpenUrl(url);
}
}
};
alertPrompt.Show();
}
/*private async void SendEmail()
{
var mailController = new MFMailComposeViewController();
mailController.SetToRecipients(new string[] { TextEmail.Text });
mailController.SetSubject("5 Minute Meeting");
mailController.SetMessageBody("We are having a 5 minute stand up tomorrow at this time! Check your calendar.", false);
mailController.Finished += (object s, MFComposeResultEventArgs args) =>
{
Console.WriteLine(args.Result.ToString());
args.Controller.DismissViewController(true, (Action)null);
};
PresentViewControllerAsync(mailController, true);
}*/
public override void PrepareForSegue(UIStoryboardSegue segue, NSObject sender)
{
switch(segue.Identifier)
{
case "email":
{
var vc = segue.DestinationViewController as SendEmailViewController;
vc.ViewModel.FirstName = ViewModel.FirstName;
vc.ViewModel.LastName = ViewModel.LastName;
vc.ViewModel.Email = ViewModel.Email;
}
break;
case "meeting":
{
var vc = segue.DestinationViewController as NewEventDurationViewController;
vc.ViewModel.FirstName = ViewModel.FirstName;
vc.ViewModel.LastName = ViewModel.LastName;
vc.ViewModel.Email = ViewModel.Email;
}
break;
}
}
#region Keyboard
private UIView activeview; // Controller that activated the keyboard
private float scrollamount; // amount to scroll
private float bottom; // bottom point
private const float Offset = 68.0f; // extra offset
private bool moveViewUp; // which direction are we moving
private void KeyBoardDownNotification(NSNotification notification)
{
if (moveViewUp) { ScrollTheView(false); }
}
private void ScrollTheView(bool move)
{
// scroll the view up or down
UIView.BeginAnimations(string.Empty, System.IntPtr.Zero);
UIView.SetAnimationDuration(0.3);
CGRect frame = (CGRect)View.Frame;
if (move)
{
frame.Y -= scrollamount;
}
else
{
frame.Y += scrollamount;
scrollamount = 0;
}
View.Frame = frame;
UIView.CommitAnimations();
}
private void KeyBoardUpNotification(NSNotification notification)
{
// get the keyboard size
var r = (CGRect)UIKeyboard.FrameBeginFromNotification((NSNotification)notification);
// Find what opened the keyboard
foreach (UIView view in this.View.Subviews)
{
if (view.IsFirstResponder)
activeview = view;
}
// Bottom of the controller = initial position + height + offset
bottom = ((float)activeview.Frame.Y + (float)activeview.Frame.Height + Offset);
// Calculate how far we need to scroll
scrollamount = ((float)r.Height - ((float)View.Frame.Size.Height - bottom));
// Perform the scrolling
if (scrollamount > 0)
{
moveViewUp = true;
ScrollTheView(moveViewUp);
}
else
{
moveViewUp = false;
}
}
#endregion
}
}
I am very new to Xamarin & app development and I just wanted to run this because it is a very similar project to one that I am creating.
Thanks for your help

SetImage is a extension method contained in Xamarin.SDWebImage. Ensure, that you have restored all nuget packages or have installed it via
Install-Package Xamarin.SDWebImage
see: https://www.nuget.org/packages/Xamarin.SDWebImage/

Here a explanation of the error.
https://msdn.microsoft.com/en-us/library/bb383961.aspx
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
CS1061 - UIImageView does not contain a definition for 'SetImage' and no extension method 'SetImage' accepting a first argument of type 'UIImageView' could be found (are you missing a using directive or an assembly reference?)
In your code I don't watch a declaration of ImagePhoto check right click goto definition. And verify that for imagePhoto exist a method setImage ImagePhoto I'm asumming that is object of type UIImage
ImagePhoto.SetImage(
url: new NSUrl(Gravatar.GetURL(TextEmail.Text, 172)),
placeholder: UIImage.FromBundle("missing.png")
);

Xamarin IOS Can't get GeoFencing to work

I have the following test code running on my phone. It shows a circle on the map where my GeoFence is. If I walk outside of the fence, then back in then backout the events are never firing. I have no idea what Im missing:
using MonoTouch;
using CoreLocation;
using MapKit;
using System.Drawing;
using CoreGraphics;
namespace GeoFencingTest
{
public class GeoFencingController : UIViewController
{
UIWindow Parent;
CustomMapView mapView;
CLLocationManager locMgr = new CLLocationManager ();
UITextView textview;
UIButton button;
CLCircularRegion region;
CLLocationCoordinate2D FenceCenter;
public GeoFencingController (UIWindow parent)
{
var radius = 25;
FenceCenter = new CLLocationCoordinate2D (33.8399522334765, -84.3729872355209);
Parent = parent;
View = new UIView (new RectangleF ((float)Parent.Bounds.Left, (float)Parent.Bounds.Top, (float)Parent.Bounds.Width, (float)Parent.Bounds.Height));
parent.AddSubview (View);
locMgr.RequestWhenInUseAuthorization ();
locMgr.DesiredAccuracy = 5;
locMgr.StartUpdatingLocation ();
region = new CLCircularRegion (FenceCenter, radius, "TPM");
locMgr.StartMonitoring (region);
mapView = new CustomMapView ();
mapView.Frame = new RectangleF ((float)Parent.Bounds.Left + 20, (float)55, (float)Parent.Bounds.Width - 40, (float)Parent.Bounds.Height - 80);
mapView.ShowsUserLocation = true;
mapView.UserInteractionEnabled = true;
mapView.MapType = MKMapType.Hybrid;
mapView.ZoomEnabled = true;
mapView.ScrollEnabled = true;
mapView.UserTrackingMode = MKUserTrackingMode.Follow;
mapView.Delegate = new MapDelegate ();
mapView.CenterCoordinate = FenceCenter;
View.AddSubview (mapView);
var circleOverlay = MKCircle.Circle (new CLLocationCoordinate2D (FenceCenter.Latitude, FenceCenter.Longitude), radius);
mapView.AddOverlay (circleOverlay);
textview = new UITextView (new RectangleF (0, 20, 190, 50));
View.AddSubview (textview);
if (CLLocationManager.IsMonitoringAvailable (typeof(CLCircularRegion))) {
locMgr.DidStartMonitoringForRegion += (o, e) => {
textview.Text = "Now monitoring region " + e.Region.ToString ();
};
locMgr.RegionEntered += (o, e) => {
textview.Text = "Just entered " + e.Region.ToString ();
};
locMgr.RegionLeft += (o, e) => {
textview.Text = "Just left " + e.Region.ToString ();
};
} else {
textview.Text = "This app requires region monitoring, which is unavailable on this device";
}
}
public class MapDelegate : MKMapViewDelegate
{
public override MKOverlayView GetViewForOverlay (MKMapView mapView, NSObject overlay)
{
// return a view for the polygon
MKCircle circle = overlay as MKCircle;
MKCircleView circleView = new MKCircleView (circle);
circleView.FillColor = UIColor.Yellow;
circleView.Alpha = 0.5f;
circleView.LineWidth = 10;
circleView.StrokeColor = UIColor.Red;
return circleView;
}
}
public class CustomMapView : MKMapView
{
public override void TouchesBegan (NSSet touches, UIEvent evt)
{
base.TouchesBegan (touches, evt);
UITouch touch = touches.AnyObject as UITouch;
CGPoint pointInView = touch.LocationInView (this);
CLLocationCoordinate2D touchCoordinates = base.ConvertPoint (pointInView, this);
MKMapPoint mapPoint = MKMapPoint.FromCoordinate (touchCoordinates);
Console.WriteLine ("LAT: " + touchCoordinates.Latitude);
Console.WriteLine ("LON: " + touchCoordinates.Longitude);
}
}
}
}

You may want to try setting up your event handlers before calling StartMonitoring instead of after.

Array of buttons: change property

I have an array of buttons, like this:
int x = 0, y = 0;
butt2 = new Button[100];
for (int i = 0; i < 100; i++)
{
butt2[i] = new Button();
int names = i;
butt2[i].Name = "b2" + names.ToString();
butt2[i].Location = new Point(525 + (x * 31), 70 + (y * 21));
butt2[i].Visible = true;
butt2[i].Size = new Size(30, 20);
butt2[i].Click += new EventHandler(butt2_2_Click); //problem lies here (1)
this.Controls.Add(butt2[i]);
}
private void butt2_2_Click(object sender, EventArgs e)
{
// want code here
}
I want to change the back color of the button when clicked. I was thinking of passing i to be able to do this:
butt2[i].BackColor = Color.Green;

This should do the trick:
private void butt2_2_Click(object sender, EventArgs e)
{
Button pushedBtn = sender as Button;
if(pushedBtn != null)
{
pushedBtn.BackColor = Color.Green;
}
}
And this holds for most UI events, the 'object sender' parameter refers to the control that 'sent'/'fired' the event.
To learn more about C# event handling, I would start here.
Also, here is a SO question about GUI event handling, answered nicely by Juliet (accepted answer).
Hope this helps.

c# adding checkboxes to panle wierd behavior

i got a Class called AdvancePanle that drived from Panle, and i got a class call AdvnaceCheckBox that drived from CheckBox.
I created a AdvancePanle in my Form, and now i want to add some AdvnaceCheckBox's to it.
so i created this, simple method:
private void addCheckBox()
{
AdvancedCheckBox checkbox;
for (int i = 0; i < 10; i++)
{
checkbox = new AdvancedCheckBox();
checkbox.Location = new Point(0, i + 5);
checkbox.Text = "bla" + i;
selectablePanel1.Controls.Add(checkbox);
}
}
and i call this method in the Form onLoad:
protected override void OnLoad(EventArgs e)
{
addCheckBox();
selectablePanel1.AutoScroll = true;
base.OnLoad(e);
}
but afther the Form is opened, I can see only 1 CheckBox in the Panle.
i tried playing with the position, but i alwys see only 1 checkbox.
am I adding the CheckBoxs in a worng way?
(sorry for my english)

You're placing them too close to each other. (0, 5+i) will evaluate to:
(0,5)
(0,6)
(0,7)
(0,8)
...
Try this instead:
checkbox.Location = new Point(0, i*100 + 5);
or this:
checkbox.Location = new Point(0, i*checkbox.Height + 5);