Decimal Explicit Conversion (Double to Decimal)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Converts a double-precision floating-point number to a Decimal.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- value
- Type: System.Double
A double-precision floating-point number.
Return Value
Type: System.DecimalA Decimal that represents the converted double-precision floating point number.
| Exception | Condition |
|---|---|
| OverflowException | value is less than MinValue or greater than MaxValue. -or- value is Double.NaN, Double.PositiveInfinity, or Double.NegativeInfinity. |
The following code example converts Double values to Decimal numbers using the Double to Decimal conversion. This conversion requires the op_Explicit operator in Visual Basic.
// Example of the explicit conversion from double to decimal. using System; class Example { const string formatter = "{0,25:E16}{1,33}"; // Get the exception type name; remove the namespace prefix. public static string GetExceptionType(Exception ex) { string exceptionType = ex.GetType().ToString(); return exceptionType.Substring( exceptionType.LastIndexOf('.') + 1); } // Convert the double argument; catch exceptions that are thrown. public static void DecimalFromDouble(System.Windows.Controls.TextBlock outputBlock, double argument) { object decValue; // Convert the double argument to a decimal value. try { decValue = (decimal)argument; } catch (Exception ex) { decValue = GetExceptionType(ex); } outputBlock.Text += String.Format(formatter, argument, decValue) + "\n"; } public static void Demo(System.Windows.Controls.TextBlock outputBlock) { outputBlock.Text += "This example of the explicit conversion from double " + "to decimal \ngenerates the following output.\n" + "\n"; outputBlock.Text += String.Format(formatter, "double argument", "decimal value") + "\n"; outputBlock.Text += String.Format(formatter, "---------------", "-------------") + "\n"; // Convert double values and display the results. DecimalFromDouble(outputBlock, 1.234567890123E-30); DecimalFromDouble(outputBlock, 1.2345678901234E-25); DecimalFromDouble(outputBlock, 1.23456789012345E-20); DecimalFromDouble(outputBlock, 1.234567890123456E-10); DecimalFromDouble(outputBlock, 1.2345678901234567); DecimalFromDouble(outputBlock, 1.23456789012345678E+12); DecimalFromDouble(outputBlock, 1.234567890123456789E+28); DecimalFromDouble(outputBlock, 1.234567890123456789E+30); } } /* This example of the explicit conversion from double to decimal generates the following output. double argument decimal value --------------- ------------- 1.2345678901230000E-030 0 1.2345678901233999E-025 0.0000000000000000000000001235 1.2345678901234499E-020 0.0000000000000000000123456789 1.2345678901234560E-010 0.000000000123456789012346 1.2345678901234567E+000 1.23456789012346 1.2345678901234568E+012 1234567890123.46 1.2345678901234568E+028 12345678901234600000000000000 1.2345678901234569E+030 OverflowException */