Problem with assigning calculated double values to Point

10 replies. Latest Post by N.Tony on July 26, 2007.

(1)

rabinovic

Member

20 points

6 Posts

Problem with assigning calculated double values to Point

05-24-2007 7:20 AM |

I have the following problem:

ArcSegment arcSeg = this.FindName("arcSeg") as ArcSegment;

double x = 50.0 * Math.Cos(0.1);

double y = - 50.0 * Math.Sin(0.1);

arcSeg.Point = new Point(x,y);

Well x = 49,7502082639013 and y -4,99167083234141

But arcSeg.Point is not (49.75, -4.99) what i get is (49, 7502086390)

I have the same problem when i use lineSegments

Here is what i mean: http://www.bilder-hosting.de/show/CEZ6Y.html

jm47

Member

26 points

11 Posts

Re: Problem with assigning calculated double values to Point

05-25-2007 3:35 AM |

Can you paste the XAML? When I use the following code (similar except the control is created in C# instead of in xaml), the point is correct:

ArcSegment arcSeg = new ArcSegment();

double x = 50.0 * Math.Cos(0.1);

double y = -50.0 * Math.Sin(0.1);

arcSeg.Point = new Point(x, y);

Console.WriteLine(arcSeg.Point.ToString());

rabinovic

Member

20 points

6 Posts

Re: Problem with assigning calculated double values to Point

05-25-2007 7:03 AM |

I have copied your code. after running i get the output: 49,7502082605056. In a WPF application the Point is correct, but in a Silverlight application It is still not correct

bobrob

Member

28 points

19 Posts

Re: Problem with assigning calculated double values to Point

05-28-2007 3:21 AM |

Read http://silverlight.net/forums/t/1412.aspx

Same bug in my opinion. Tragic bug! All floating point coordinates fail for Europeen Silverlight clients.

rabinovic

Member

20 points

6 Posts

Re: Problem with assigning calculated double values to Point

05-28-2007 4:04 AM |

I think have the answer (10x bobrob):

Well i set the current culture to something like English Canada and this works:

public void Page_Loaded(object o, EventArgs e)

{

try

{

System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-CA");

} catch { }

// Required to initialize variables

InitializeComponent();

ArcSegment arc = new ArcSegment(); double x = 123.23423;

double y = 567567.3534;

arc.Point = new Point(x, y);

}

I get the right values in arg.Point!

Thanks!

bobrob

Member

28 points

19 Posts

Re: Re: Problem with assigning calculated double values to Point

05-29-2007 5:20 AM |

It does not work for me, I get the exception:

Attempt to access the method failed: System.Threading.Thread.set_CurrentCulture(System.Globalization.CultureInfo)

Even if ignored, the culture is not changed:

double d= 34.12;
string str1= d.ToString(); // "34,12"
try
{
System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-CA");
}
catch
{}
string str2= d.ToString(); // "34,12"

...and drawing operations are erroneous.

rabinovic

Member

20 points

6 Posts

Re: Re: Problem with assigning calculated double values to Point

05-29-2007 8:10 AM |

try to change the current language of your operating system to english (in the system control).

I think this will solve the problem.

luisabreu

Participant

1676 points

612 Posts

Re: Problem with assigning calculated double values to Point

05-29-2007 8:54 AM |

hello.

rabinovic:
System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-CA");

i believe this won't work because the CurrentCulture set is annotated with the SecurityCritical code (which means it can only be aclled by platform code).

rabinovic

Member

20 points

6 Posts

Re: Problem with assigning calculated double values to Point

05-29-2007 9:43 AM |

you are right.

I found that this part of code doesn't make any change. As i have mentioned in the previous post i changed the current language of my winXp to english in the system control. Now it works.

seemar