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Decimal Explicit Conversion (Single to Decimal)

Converts a single-precision floating-point number to a Decimal.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static explicit operator decimal (
	float value


Type: System.Single
A single-precision floating-point number.

Return Value

Type: System.Decimal
A Decimal that represents the converted single-precision floating point number.


value is less than MinValue or greater than MaxValue.


value is Single.NaN, Single.PositiveInfinity, or Single.NegativeInfinity.

The following code example converts Single values to Decimal numbers using the Single to Decimal conversion. This conversion requires the op_Explicit operator in Visual Basic.

// Example of the explicit conversion from float to decimal.
using System;

class Example
   const string formatter = "{0,16:E7}{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 float argument; catch exceptions that are thrown.
   public static void DecimalFromSingle(System.Windows.Controls.TextBlock outputBlock, float argument)
      object decValue;

      // Convert the float argument to a decimal value.
         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 float " +
          "to decimal \ngenerates the following output.\n" + "\n";
      outputBlock.Text += String.Format(formatter, "float argument",
          "decimal value") + "\n";
      outputBlock.Text += String.Format(formatter, "--------------",
          "-------------") + "\n";

      // Convert float values and display the results.
      DecimalFromSingle(outputBlock, 1.2345E-30F);
      DecimalFromSingle(outputBlock, 1.2345E-26F);
      DecimalFromSingle(outputBlock, 1.23456E-22F);
      DecimalFromSingle(outputBlock, 1.23456E-12F);
      DecimalFromSingle(outputBlock, 1.234567F);
      DecimalFromSingle(outputBlock, 1.234567E+12F);
      DecimalFromSingle(outputBlock, 1.2345678E+28F);
      DecimalFromSingle(outputBlock, 1.2345678E+30F);

This example of the explicit conversion from float to decimal
generates the following output.

  float argument                    decimal value
  --------------                    -------------
  1.2345000E-030                                0
  1.2345000E-026   0.0000000000000000000000000123
  1.2345600E-022    0.000000000000000000000123456
  1.2345600E-012              0.00000000000123456
  1.2345671E+000                         1.234567
  1.2345670E+012                    1234567000000
  1.2345678E+028    12345680000000000000000000000
  1.2345678E+030                OverflowException

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

© 2015 Microsoft