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.
Assembly: System.ServiceModel.Web (in System.ServiceModel.Web.dll)
System.ServiceModel.Dispatcher.QueryStringConverter
System.ServiceModel.Dispatcher.JsonQueryStringConverter
| Name | Description | |
|---|---|---|
![]() | QueryStringConverter() | Initializes a new instance of the QueryStringConverter class. |
| Name | Description | |
|---|---|---|
![]() | CanConvert(Type) | Determines whether the specified type can be converted to and from a string representation. |
![]() | ConvertStringToValue(String, Type) | Converts a query string parameter to the specified type. |
![]() | ConvertValueToString(Object, Type) | Converts a parameter to a query string representation. |
![]() | Equals(Object) | Determines whether the specified object is equal to the current object.(Inherited from Object.) |
![]() | Finalize() | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.) |
![]() | GetHashCode() | Serves as the default hash function. (Inherited from Object.) |
![]() | GetType() | |
![]() | MemberwiseClone() | |
![]() | ToString() | Returns a string that represents the current object.(Inherited from Object.) |
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.
[ServiceContract]
interface Calculator
{
[WebGet(UriTemplate="Add?n1={n1}&n2={n2}")]
[OperationContract]
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);
Available since 3.5
Silverlight
Available since 4.0
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

