Question

Here is what the WCF service is i want to get 5 values from the users simultaneously and send them the response of addition of first two values as AddedResult, substraction of added result and third value as SubtractedResult, multiplication of SubtractedResult and fourth value as MultipliedResult and division of multipliedResult and 5th value as DividedResult.

I know this looks non-sense but i am trying to do some advance testings with these but i am new to WCF anyone who can help will really be appreciated.

public interface IService1
{

    [OperationContract]
    string GetValuesForCalculation(int value1, int value2, int value3, int value4, int value5);


    // TODO: Add your service operations here
}


public class Service1 : IService1
{

    public int GetValuesForCalculation(int value1, int value2, int value3, int value4, int value5)
    {
        int AddedResult;
        int SubtractedResult;
        int MultipliedResult;
        int DividedResult;

        AddedResult = (value1 + value2);
        SubtractedResult = (AddedResult - value3);
        MultipliedResult = (SubtractedResult - value4);
        DividedResult =(MultipliedResult/value5);

        return AddedResult;
        return SubtractedResult;
        return MultipliedResult;
        return DividedResult;
    }


}

How do I return 4 values at the same time?

Answer 1

You need to make a DataContract and return that object.

[ServiceContract()]
interface IService1
{
    [OperationContract]
    ReturnValue GetValuesForCalculation(int value1, int value2, int value3, int value4, int value5);
}


public class Service1 : IService1
{
    public ReturnValue GetValuesForCalculation(int value1, int value2, int value3, int value4, int value5)
    {
        int AddedResult;
        int SubtractedResult;
        int MultipliedResult;
        int DividedResult;

        AddedResult = (value1 + value2);
        SubtractedResult = (AddedResult - value3);
        MultipliedResult = (SubtractedResult - value4);
        DividedResult =(MultipliedResult/value5);

        var returnValue = new ReturnValue(AddedResult, SubtractedResult, MultipliedResult,DividedResult); 

        return returnValue ;
    }
}

[DataContract]
public class ReturnValue
{
    public ReturnValue(int addedResult, int subtractedResult, int multipliedResult, int dividedResult)
    {
        AddedResult = addedResult;
        SubtractedResult = subtractedResult;
        MultipliedResult = multipliedResult;
        DividedResult = dividedResult;
    }

    [DataMember]
    public int AddedResult {get; set;}

    [DataMember]
    public int SubtractedResult {get; set;}

    [DataMember]
    public int MultipliedResult {get; set;}

    [DataMember]
    public int DividedResult {get; set;}
}

On your client side that ReturnValue class will be automatically generated by the same code that generates your client proxy (be it the tool built in to visual studio or svcutil.exe)

Here is the MSDN Page on DataContracts.