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ToDouble Method

XmlConvert.ToDouble Method

Converts the String to a Double equivalent.

Namespace:  System.Xml
Assemblies:   System.Xml (in System.Xml.dll)
  System.Xml.ReaderWriter (in System.Xml.ReaderWriter.dll)

public static double ToDouble(
	string s
)

Parameters

s
Type: System.String

The string to convert.

Return Value

Type: System.Double
A Double equivalent of the string.

ExceptionCondition
ArgumentNullException

s is null.

FormatException

s is not in the correct format.

OverflowException

s represents a number less than Double.MinValue or greater than Double.MaxValue.

If s is INF or -INF, this method returns Double.PositiveInfinity or Double.NegativeInfinity respectively.

The following example uses ToDouble and ToDateTime to read strongly typed data.

using System;
using System.IO;
using System.Xml;

public class Sample
{

  public static void Main()
  {
    XmlTextReader reader = new XmlTextReader("orderData.xml");

    //Parse the file and pull out the order date and price. 
    while (reader.Read()){
       if (reader.NodeType==XmlNodeType.Element){
         switch(reader.Name){
           case "order":
             DateTime orderDate = XmlConvert.ToDateTime(reader.GetAttribute("date"));
             Console.WriteLine("order date: {0}", orderDate.ToString());
             break;
           case "price":
             Double price = XmlConvert.ToDouble(reader.ReadInnerXml());
             Console.WriteLine("price: {0}", price.ToString());
             break;
         }
       }
    }

    //Close the reader.
    reader.Close();  
  }
}

The example uses the file, orderData.xml, as input.

<order date="2001-05-03">
  <orderID>367A54</orderID>
  <custID>32632</custID>
  <price>19.95</price>
</order>

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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