Convert.ToDouble Method (Decimal)
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Converts the value of the specified Decimal number to an equivalent double-precision floating point number.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Shared Function ToDouble ( _
value As Decimal _
) As Double
public static double ToDouble(
decimal value
)
Parameters
- value
Type: System.Decimal
A Decimal 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 Decimal value to a Double one, using ToDouble.
Public Sub ConvertDoubleDecimal(ByVal decimalVal As Decimal)
Dim doubleVal As Double
' Decimal to Double conversion cannot overflow.
doubleVal = System.Convert.ToDouble(decimalVal)
outputBlock.Text &= String.Format("{0} as a Double is: {1}", _
decimalVal, doubleVal) & vbCrLf
' Conversion from Double to Decimal can overflow.
Try
decimalVal = System.Convert.ToDecimal(doubleVal)
outputBlock.Text &= String.Format("{0} as a Decimal is: {1}", _
doubleVal, decimalVal) & vbCrLf
Catch exception As System.OverflowException
outputBlock.Text &= String.Format( _
"Overflow in Double-to-Decimal conversion.") & vbCrLf
End Try
End Sub
public void ConvertDoubleDecimal(decimal decimalVal)
{
double doubleVal;
// Decimal to double conversion cannot overflow.
doubleVal = System.Convert.ToDouble(decimalVal);
outputBlock.Text += String.Format("{0} as a double is: {1}",
decimalVal, doubleVal) + "\n";
// Conversion from double to decimal can overflow.
try
{
decimalVal = System.Convert.ToDecimal(doubleVal);
outputBlock.Text += String.Format("{0} as a decimal is: {1}",
doubleVal, decimalVal) + "\n";
}
catch (System.OverflowException)
{
outputBlock.Text += String.Format(
"Overflow in double-to-double conversion.") + "\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.