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MapsUI 1.4.0 Xamarin differemce versions Newtonsoft.Json

I am writing a app where you can show your location on the screen. Everything works fine but the map is just one pixel line high. Is there a solution for this?
<Grid x:Name="MapGrid"
HorizontalOptions="CenterAndExpand"/>
<Grid>
This is the main cs code of my project, i dont get breaking errors just warnings about packages. My app will start just fine just showing just one pixel line of the map.
using System;
using System.ComponentModel;
using Xamarin.Forms;
using Xamarin.Essentials;
using Mapsui.Utilities;
using Mapsui.Projection;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
private MapsuiView mapControl;
public MainPage()
{
InitializeComponent();
mapControl = new MapsuiView();
mapControl.NativeMap.Layers.Add(OpenStreetMap.CreateTileLayer());
MapGrid.Children.Add(mapControl);
Device.StartTimer(TimeSpan.FromSeconds(2), () =>
{
GoToLocation();
return true;
});
async void GoToLocation()
{
Location location = await getLocation();
if (location != null)
{
var sphericalMercatorCoordinate = SphericalMercator.FromLonLat(location.Longitude, location.Latitude);
mapControl.NativeMap.NavigateTo(sphericalMercatorCoordinate);
mapControl.NativeMap.NavigateTo(mapControl.NativeMap.Resolutions[15]);
}
}
async Task<Location> getLocation()
{
Location location = null;
try
{
var request = new GeolocationRequest(GeolocationAccuracy.Best);
location = await Geolocation.GetLocationAsync(request);
if(location != null)
{
Console.WriteLine($"Latitude: {location.Latitude}, " +
$"Longitude: {location.Longitude}, " +
$"Altitude: {location.Altitude}, " +
$"Accuracy: {location.Accuracy}");
}
}
catch (FeatureNotSupportedException fnsEx)
{
Console.WriteLine(fnsEx.ToString());
}
catch (FeatureNotEnabledException fneEx)
{
Console.WriteLine(fneEx.ToString());
}
catch (PermissionException pEx)
{
Console.WriteLine(pEx.ToString());
}
catch (Exception ex)
{
Console.WriteLine("Overige fout: " + ex.ToString());
}
return location;
}
}
}
}
This is a class which i added because it wouldn't work otherwise.
using System;
using System.Collections.Generic;
using System.Text;
namespace mobile_83504_3
{
public class MapsuiView : Xamarin.Forms.View
{
public Mapsui.Map NativeMap { get; }
protected internal MapsuiView()
{
NativeMap = new Mapsui.Map();
}
}
}
I'm using MapsUI 1.4.0 and it's trying to connect to a Newtonsoft.Json 9.0.0 that coudn't be found. so it takes 9.0.1, i don't know if that is the error but that is one of the few warnings that i get. alongside with a .NET framework that might not be fully compatible.

Everything works fine but the map is just one pixel line high. Is there a solution for this?
To use the Mapsui, it's not necessary to create a custom mapsui view. Add the declare line code to the xaml file, the view will be available.
Check the code:
<ContentPage
...
xmlns:mapsui="clr-namespace:Mapsui.UI.Forms;assembly=Mapsui.UI.Forms">
<StackLayout>
<mapsui:MapView x:Name="mapView"
VerticalOptions="FillAndExpand"
HorizontalOptions="Fill"
BackgroundColor="Gray" />
</StackLayout>
</ContentPage>
How to use Mapsui 2.0.1 with Xamarin.Forms?

Synaptics SDK can't find device

I'm attempting to grab a device handle on the Synaptics Touchpad using the Synaptics SDK, specifically using methods in the SYNCTRLLib.
However, the SYNCTRL method failed to find it, returning -1.
Syn.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using SYNCOMLib;
using SYNCTRLLib;
namespace TP_Test1
{
class Syn
{
SynAPICtrl SynTP_API = new SynAPICtrl();
SynDeviceCtrl SynTP_Dev = new SynDeviceCtrl();
SynPacketCtrl SynTP_Pack = new SynPacketCtrl();
int DeviceHandle;
//Constructor
public Syn ()
{
SynTP_API.Initialize();
SynTP_API.Activate();
//DeviceHandle == -1 ? Can't find device?
DeviceHandle = SynTP_API.FindDevice(new SynConnectionType(), new SynDeviceType(), 0);
//Below line causing Unhandled Exception
SynTP_Dev.Select(DeviceHandle);
SynTP_Dev.Activate();
SynTP_Dev.OnPacket += SynTP_Dev_OnPacket;
}
public void SynTP_Dev_OnPacket()
{
Console.WriteLine(SynTP_Pack.FingerState);
Console.WriteLine(SynTP_Pack.X);
Console.WriteLine(SynTP_Pack.Y);
}
}
}
Program.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using SYNCOMLib;
using SYNCTRLLib;
namespace TP_Test1
{
class Program
{
static void Main(string[] args)
{
Syn mySyn = new Syn();
mySyn.SynTP_Dev_OnPacket();
}
}
}

I see that you are using the C# wrappers for Synaptics SDK. Even though CPP code might be not trivial to you, you might want to take a look at the file Samples/ComTest.cpp. It contains some example logic in order to find devices, more specifically at lines 66-76:
// Find a device, preferentially a TouchPad or Styk.
ISynDevice *pDevice = 0;
long lHandle = -1;
if ((pAPI->FindDevice(SE_ConnectionAny, SE_DeviceTouchPad, &lHandle) &&
pAPI->FindDevice(SE_ConnectionAny, SE_DeviceStyk, &lHandle) &&
pAPI->FindDevice(SE_ConnectionAny, SE_DeviceAny, &lHandle)) ||
pAPI->CreateDevice(lHandle, &pDevice))
{
printf("Unable to find a Synaptics Device.\n");
exit(-1);
}
Also, make sure you have registered the dlls. According to the ReadSynSDK.txt file:
For certain purposes it may be necessary to register the dlls
that are provided with the SDK. This can be done with the windows regsvr32
utility.

c# error: input string was not in a correct format

I'm a beginner in c#, currently attempting a windows form project. I've designed a form titled drugform. I use the dataset method to connect to the database. Here is my code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;
using System.Windows.Forms;
using drugstoreform.BaseInfoTableAdapters;
namespace drugstoreform
{
public partial class DrugForm : Form
{
int Row = -1;
public DrugForm()
{
InitializeComponent();
}
private void Register_click(object sender, EventArgs e)
{
try
{
dbm_Medecine db = new dbm_Medecine();
db.Insert(Convert.ToInt32(DrugCode.Text.Trim()), DrugName.Text.Trim(), Convert.ToString(HowUse.Text.Trim()), Convert.ToDecimal(price.Text.Trim()));
}
catch(SqlException ex)
{
}
When I click on the register button, I get this error: input string was not in a correct format.

You get the error inConvert.ToInt32 and/or Convert.ToDecimal because the input was invalid. You can use int.TryParse and decimal.TryParse to validate it:
int drugCode;
decimal price;
if (int.TryParse(DrugCode.Text.Trim(), out drugCode) && decimal.TryParse(price.Text.Trim(), out price))
{
db.Insert(drugCode, DrugName.Text.Trim(), HowUse.Text.Trim(), price);
}
In the if drugCode and price are initialized with the correct value. Otherwise you should provide an error message that the user should provide correct input.
Possible reasons: perhaps the user enters 2.6 but the computer uses , as decimal separator. Or DrugCode.Text or price.Text are simply empty.

How to give Common path to video

I am working in project in which I have used vlc plugin v2. the path for my video is
axVLC.playlist.add(#"D:\My Project\Science\Resources\myvideo.mp4");
axVLC.playlist.play();
now the problem is when I build the project and give it to someone and he/she install it on his/her computer , it show exception that video path is wrong. I am sure that path is not suitable as my the video path in my project is D:... and he/she installed it on C.
So my question is that is there any way to give it common path by which user don`t face such kind of error

Import IO
Using System.IO;
then declare a string that will reference to your video folder
string AbsoluteRef;
use this code in your form load
if (System.Diagnostics.Debugger.IsAttached)
{
AbsoluteRef = Path.GetFullPath(Application.StartupPath + "\\..\\..\\Resources\\");
}
else
{
AbsoluteRef = Application.StartupPath + "\\Resources\\";
}
Now declare a string for your video or which ever file like
string vlcvideo;
now add the two together
vlcvideo = AbsoluteRef & "myvideo.mp4";
Finnally add all this into your vlc plugin
axVLC.playlist.add(vlcvideo);
Complete Code looks like so.
using Microsoft.VisualBasic;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Windows.Input;
using yournamespace.Forms;
using System.IO;
namespace yourNameSpace
{
public partial class frmMain : Form
{
public frmMain()
{
InitializeComponent();
}
string AbsoluteRef = null;
private void frmMain_Load(object sender, EventArgs e)
{
if (System.Diagnostics.Debugger.IsAttached)
{
AbsoluteRef = Path.GetFullPath(Application.StartupPath + "\\..\\..\\Resources\\");
}
else
{
AbsoluteRef = Application.StartupPath + "\\Resources\\";
}
string vlcVideo = AbsoluteRef + "myvideo.mp4";
axVLC.playlist.add(vlcvideo);
}

C# and Microsoft Speech.Recognition and Speech.Synthesis

I'm new to C# and I'm new to Speech.Recognition.
I searched very long for tutorials but didn't find that much, I'm even not quiet sure whether I included everything correctly.
I downloaded:
SDK
Runtime
Languages
I'm programming local, I have Windows XP, .net framework 3.5.
Now I just want to get started with some simple lines of code, like to say "hello world" or say one or two words as input.
I tried following, and of course it doesn't work :>
error:
"The Typ- or Namespacename "SpeechSynthesizer" couldn't be found (Is a Using-Direktive or a Assemblyverweis missing?)"
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Speech.Recognition;
using System.Speech.Synthesis;
namespace System.Speech.Recognition { }
namespace System.Speech.AudioFormat {}
namespace System.Speech.Recognition.SrgsGrammar{}
namespace System.Speech.Synthesis { }
namespace System.Speech.Synthesis.TtsEngine { }
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
SpeechSynthesizer foo = new SpeechSynthesizer();
foo.Speak("Test");
}
}
}
edit:
hello,
i tried you code,but
using SpeechLib;
couldn't be found :>
well now i wrote:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Speech.Recognition;
using System.Speech.Synthesis;
using System.SpeechLib;
namespace System.SpeechLib { }
namespace System.Speech.Recognition { }
namespace System.Speech.AudioFormat {}
namespace System.Speech.Recognition.SrgsGrammar{}
namespace System.Speech.Synthesis { }
namespace System.Speech.Synthesis.TtsEngine { }
but I get an error with:
numericUpDown1,SpVoice,SpeechVoiceSpeakFlags,textBox1 and Timeout

Project + Add Reference, .NET tab, select "System.Speech".
A project template pre-selects several .NET assemblies. But only common ones, like System.dll, System.Core.dll, etcetera. You have to add the 'unusual' ones yourself.

you can try this:
get Interop.SpeechLib.dll
using SpeechLib;
private void ReadText(string readText)
{
int iCounter = 0;
while (Convert.ToInt32(numericUpDown1.Value) > iCounter)
{
SpVoice spVoice = new SpVoice();
spVoice.Speak(textBox1.Text, SpeechVoiceSpeakFlags.SVSFPurgeBeforeSpeak);
spVoice.WaitUntilDone(Timeout.Infinite);
iCounter = iCounter + 1;
}
}