Using JavaScript to consume ASP.net Script Services

My ASP.NET script service needs to be accessed from JavaScript using JSONP due to cross-domain restrictions. When dealing with a complex input structure, I have to construct the client-side input structure myself. How does the matching between the client-side and server-side parameters occur?

To clarify the question:

If I have managed to create and pass the complex input to the Script Method, how is the validation of my input structure against the input parameter of the Script method carried out? What determines this matching process?

asp.netjavascriptweb-services

Answer №1

Are you looking to send complex data types to a web service without relying on the Microsoft.Ajax framework? I have provided a simple example using JQuery.

Let's assume we have a C# class that is used as a parameter for the web method:

namespace JQueryWebServiceTest
{
    public class TwoStringsTogether
    {
        public string StringA;
        public string StringB;
    }
}

The web method has the following signature:

TwoStringsTogether TransformTwoStringsTogether(TwoStringsTogether input)

You can make a call to the method in the following way:

$.ajax({
    type: "POST",
    contentType: "application/json; charset=utf-8",
    url: "TestService.asmx/TransformTwoStringsTogether",
    data:"{" +
        "input: {" +
        "__type: 'JQueryWebServiceTest.TwoStringsTogether'," +
        "StringA: 'HelloA'," +
        "StringB: 'HelloB'" +
        "}" +
    "}",
    dataType: "json",
    success: SuccessCallback
});

Make sure to include the __type parameter, as it is crucial for the functionality.

Answer №2

When dealing with this scenario, you'll need to send a JSON structure that aligns with the parameters you've identified. If the structure matches what the service expects, your call will be successful; otherwise, it will fail.

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