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QueryStringConverter Class

This class converts a parameter in a query string to an object of the appropriate type. It can also convert a parameter from an object to its query string representation.

Namespace:  System.ServiceModel.Dispatcher
Assembly:  System.ServiceModel.Web (in System.ServiceModel.Web.dll)

public class QueryStringConverter

Parameters can be specified in a query string within a URL. This class takes those parameters specified in a string and converts them into objects. For example, the following contract is defined.

interface Calculator
   long Add(long n1, long n2);

A Windows Communication Foundation (WCF) service implements this interface and exposes it on an endpoint with the WebHttpBehavior at http://localhost:8000/MyCalcService. The Add service operation can be called by sending an HTTP GET to http://localhost:8000/MyCalcService/Add?n1=10&n2=5. The QueryStringConverter receives this URL and converts the two parameters (n1 and n2) specified in the URL into two long objects with the appropriate values.

You can derive a class from QueryStringConverter to control how query string parameters are mapped into a service operation's parameters.

The QueryStringConverter supports the following types by default:

The following code shows how to use the QueryStringConverter class to convert between a string and a 32-bit integer.

QueryStringConverter converter = new QueryStringConverter();
if (converter.CanConvert(typeof(Int32)))
    converter.ConvertStringToValue("123", typeof(Int32));
int value = 321;
string strValue = converter.ConvertValueToString(value, typeof(Int32));
Console.WriteLine("the value = {0}, the string representation of the value = {1}", value, strValue);


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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