Pass ArrayList to web service in C#

Question

I have web service that should receive param ArrayList

[WebMethod] 
public void SelectPatches(ArrayList selectedPatches){}

But when I call this method from client Visual Studio return error:

Cannot convert from 'System.Collections.ArrayList' to 'object[]'

Is it possible to pass parameter with type ArrayList to Web Service?

abatishchev · Accepted Answer · 2011-11-13 14:40:40Z

3

Don't use non-generic collections. Use generic, at least List<object>.

Web method should accept array of any type, thus use ToArray() extension method.

answered Nov 13, 2011 at 14:40

abatishchev

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1 Comment

Marc Gravell Over a year ago

Really, a more specific typed list is preferable. A web-service wont love "object"

Polynomial · Accepted Answer · 2011-11-13 14:37:52Z

1

You can use arrayList.ToArray() (MSDN) to convert an ArrayList to an object[].

You can also use arrayList.ToArray(Type) (MSDN) to convert an ArrayList to an array of the specified type, instead of having to cast each element individually.

answered Nov 13, 2011 at 14:37

Polynomial

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