This documentation is archived and is not being maintained.

Convert.ToDecimal Method (Double)

Converts the value of the specified double-precision floating-point number to an equivalent decimal number.

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

public static decimal ToDecimal(
	double value
)

Parameters

value
Type: System.Double

The double-precision floating-point number to convert.

Return Value

Type: System.Decimal
A decimal number that is equivalent to value.

ExceptionCondition
OverflowException

value is greater than Decimal.MaxValue or less than Decimal.MinValue.

The Decimal value returned by this method contains a maximum of 15 significant digits. If the value parameter contains more than 15 significant digits, it is rounded using rounding to nearest. The following example illustrates how the Convert.ToDecimal(Double) method uses rounding to nearest to return a Decimal value with 15 significant digits.

Console.WriteLine(Convert.ToDecimal(123456789012345500.12D));  // Displays 123456789012346000
Console.WriteLine(Convert.ToDecimal(123456789012346500.12D));  // Displays 123456789012346000

Console.WriteLine(Convert.ToDecimal(10030.12345678905D));      // Displays 10030.123456789 
Console.WriteLine(Convert.ToDecimal(10030.12345678915D));      // Displays 10030.1234567892

The following example converts a Double value to a Decimal value.

		public void ConvertDoubleDecimal(decimal decimalVal){
			
			double doubleVal;
			
			// Decimal to double conversion cannot overflow.
         doubleVal = System.Convert.ToDouble(decimalVal);
			System.Console.WriteLine("{0} as a double is: {1}",
					decimalVal, doubleVal);

			// Conversion from double to decimal can overflow. 
			try 
         {
			   decimalVal = System.Convert.ToDecimal(doubleVal);
   			System.Console.WriteLine ("{0} as a decimal is: {1}",
	   			doubleVal, decimalVal);
			} 
			catch (System.OverflowException) {
				System.Console.WriteLine(
					"Overflow in double-to-double conversion.");
			}
			

		}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
Show: