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c#wcfwsdloperationcontract
Jan-Patrick Ahnen
Jan-Patrick Ahnen

Reputation: 1460

How to specify a parameter of an OperationContract as required

I wonder how I can specify a parameter of an OperationContract method in WCF as required so that the generated xsd contains minOccurs="1" instead of minOccurs="0".

Example:

[ServiceContract(Namespace = "http://myUrl.com")]  
public interface IMyWebService  
{  
   [OperationContract]  
   string DoSomething(string param1, string param2, string param3);  
}

generates this xsd: 

<xs:element name="DoSomething">  
  <xs:complexType>  
    <xs:sequence>  
      <xs:element minOccurs="0" name="param1" nillable="true" type="xs:string" />  
      <xs:element minOccurs="0" name="param2" nillable="true" type="xs:string" />  
      <xs:element minOccurs="0" name="param3" nillable="true" type="xs:string" />  
    </xs:sequence>  
  </xs:complexType>

But I want to define minOccurs="1" within the code without the necessity to manually fix it in the xsd file.

Upvotes: 7

Views: 22657

Answers (2)

Pit Ming
Pit Ming

Reputation: 401

This implementation is nice to me: http://thorarin.net/blog/post/2010/08/08/Controlling-WSDL-minOccurs-with-WCF.aspx

Upvotes: 3

Graham Clark
Graham Clark

Reputation: 12966

You might need to wrap your parameters in a class, then you can use the DataMember attribute and specify IsRequired=true:

[ServiceContract(Namespace = "http://myUrl.com")]  
public interface IMyWebService  
{  
   [OperationContract]  
   string DoSomething(RequestMessage request);  
}

[DataContract]
public class RequestMessage
{
   [DataMember(IsRequired = true)]
   public string param1 { get; set; }

   [DataMember(IsRequired = true)]
   public string param3 { get; set; }

   [DataMember(IsRequired = true)]
   public string param3 { get; set; }
}

Upvotes: 10

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