Convert.ToDouble Method (Single)
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Converts the value of the specified single-precision floating point number to an equivalent double-precision floating point number.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Shared Function ToDouble ( _
value As Single _
) As Double
public static double ToDouble(
float value
)
Parameters
- value
Type: System.Single
A single-precision floating point number.
Return Value
Type: System.Double
A double-precision floating point number equivalent to the value of value.
Examples
The following code sample illustrates the conversion of a Single value to a Double one, using ToDouble.
Public Sub CovertDoubleFloat(ByVal doubleVal As Double)
Dim singleVal As Single = 0
' Double to Single conversion cannot overflow.
singleVal = System.Convert.ToSingle(doubleVal)
outputBlock.Text &= String.Format("{0} as a Single is {1}", _
doubleVal, singleVal) & vbCrLf
' Conversion from Single to Double cannot overflow.
doubleVal = System.Convert.ToDouble(singleVal)
outputBlock.Text &= String.Format("{0} as a Double is: {1}", _
singleVal, doubleVal) & vbCrLf
End Sub
public void CovertDoubleFloat(double doubleVal)
{
float floatVal = 0;
// Double to float conversion cannot overflow.
floatVal = System.Convert.ToSingle(doubleVal);
outputBlock.Text += String.Format("{0} as a float is {1}",
doubleVal, floatVal) + "\n";
// Conversion from float to double cannot overflow.
doubleVal = System.Convert.ToDouble(floatVal);
outputBlock.Text += String.Format("{0} as a double is: {1}",
floatVal, doubleVal) + "\n";
}
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.