Enumerated Types

[Joe]

Hi,

In my web service I have a enumerated type as follows

Enum ProductType as Integer
Household = 765
Outdoor = 9
Plumbing = 129
Electrical = 239
End Enum

But on the client it is always translated such that Household = 0, Outdoor =
1, etc. Is there an attribute I should be flagging my type with to have
these values persist or am I missing something obvious?

Thanks
Joe

 

[Brooks Stoner [MSFT]]

Hi Joe,

This is a result of the Xml serialization when you generate a new proxy in
the client to connect to the web service. I went through a number of
scenarios with enumerations in web services, and found the same behavior.

If you pass the enum to the web service, it will match up correctly, and you
can then use the underlying value in the web service. So if you never need
the underlying values in your client code, you don't have to do anything
different, and can just use the enumerations.

If, however, you need to have the underlying values in your client app, you
will need to create a value mapping on the client. Here is a way to create
the mapping in a way that you can get the int value by referencing the
mapping object using the enumeration as the index.

public class ProductTypeMapping
{
private static HybridDictionary m_productTypes;
public static HybridDictionary ProductTypes
{
get { return m_productTypes; }
}
private ProductTypeMapping()
{
}
static ProductTypeMapping()
{
m_productTypes= new HybridDictionary();
m_productTypes.Add(ProductType.Household, 765);
m_productTypes.Add(ProductType.Outdoor, 9);
m_productTypes.Add(ProductType.Plumbing, 129);
m_productTypes.Add(ProductType.Electrical, 239);
}
public static int Map(ProductType index)
{
return (int) m_productTypes[index];
}
}

Then, if you need the value, you can get it as follows:

ProductType myProduct = new ProductType();
myProduct = ProductType.Outdoor;
int myProductValue = ProductTypeMapping.Map(myProduct);

I hope this helps.

Brooks Stoner

 

[WFB]

Brooks,

Thanks a lot for your help - this works great.

Joe

Hi Joe,

This is a result of the Xml serialization when you generate a new proxy in
the client to connect to the web service. I went through a number of
scenarios with enumerations in web services, and found the same behavior.

If you pass the enum to the web service, it will match up correctly, and you
can then use the underlying value in the web service. So if you never need
the underlying values in your client code, you don't have to do anything
different, and can just use the enumerations.

If, however, you need to have the underlying values in your client app, you
will need to create a value mapping on the client. Here is a way to create
the mapping in a way that you can get the int value by referencing the
mapping object using the enumeration as the index.

public class ProductTypeMapping
{
private static HybridDictionary m_productTypes;
public static HybridDictionary ProductTypes
{
get { return m_productTypes; }
}
private ProductTypeMapping()
{
}
static ProductTypeMapping()
{
m_productTypes= new HybridDictionary();
m_productTypes.Add(ProductType.Household, 765);
m_productTypes.Add(ProductType.Outdoor, 9);
m_productTypes.Add(ProductType.Plumbing, 129);
m_productTypes.Add(ProductType.Electrical, 239);
}
public static int Map(ProductType index)
{
return (int) m_productTypes[index];
}
}

Then, if you need the value, you can get it as follows:

ProductType myProduct = new ProductType();
myProduct = ProductType.Outdoor;
int myProductValue = ProductTypeMapping.Map(myProduct);

I hope this helps.

Brooks Stoner
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Hi,

In my web service I have a enumerated type as follows

Enum ProductType as Integer
Household = 765
Outdoor = 9
Plumbing = 129
Electrical = 239
End Enum

But on the client it is always translated such that Household = 0,

Outdoor

=
1, etc. Is there an attribute I should be flagging my type with to have
these values persist or am I missing something obvious?

Thanks
Joe