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Problem with implicit conversion of double to float

Posted on 2006-10-21
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Last Modified: 2012-08-13
I have some C# code that is using doubles for coordinate values that are passed to graphics functions such as:

DrawLine (Pen, x1,y1,x2,y2)

where x1, etc are all declared as double, while the methood is defined as

public void DrawLine (
      Pen pen,
      float x1,
      float y1,
      float x2,
      float y2
)



I haven't been able to get this to compile, as I get an error:

Error      2      Argument '1': cannot convert from 'double' to 'float'

I assume this a problem with either the compiler options (to allow the implicit narrowing) or the library (is there are "double" version of System.Drawing.Graphics?
(Using Visual Studio C# 2005 Express compiler)
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Question by:JustinFisher
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3 Comments
 
LVL 35

Accepted Solution

by:
Raynard7 earned 100 total points
ID: 17782698
Hi,

There is not - however you should be able to use System.Convert.ToSingle()
because with c# float is an alias for single
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LVL 13

Expert Comment

by:BlackTigerX
ID: 17782755
C# is a type safe language, try this

DrawLine (Pen, (float)x1,(float)y1,(float)x2,(float)y2)
0
 
LVL 35

Expert Comment

by:Raynard7
ID: 17782764
Or, if that does not work then

DrawLine (Pen, System.Convert.ToSingle(x1),System.Convert.ToSingle(y1),System.Convert.ToSingle(x2),System.Convert.ToSingle(y2));
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