Xamarin form consume asmx web service

Question

I have a xamarin form apps and I need it to consume an asmx web service. I encounter error when creating class in Android platform to implement the interface.

I have following this tutorial (https://www.c-sharpcorner.com/article/consuming-asmx-services-in-xamarin-forms/) to consume the asmx web service. I have this web method called "GetAllProjects" which will return List. I keep encounter error for the line of code: "return new List(result);" (refer to the codes below).

Error message: Error CS1503 Argument 1: cannot convert from 'IMSr2.Droid.IMSWS.Project[]' to 'int'. How should I return the result from the web service?

public async Task<List<IProject>> GetAllProjects(string criteria = null)
{
    return await Task.Run(() =>
    {
        var result = service.GetAllProjects();

        return new List<IProject>(result);
        /* How should I return the result from the web service?*/
    });
}

/* This hello world is working*/
public Task<string> HelloWorld()
{
    return Task.Run(() =>
    {
        return service.HelloWorld();
    });
}

I am expecting the same result as the tutorial: https://www.c-sharpcorner.com/article/consuming-asmx-services-in-xamarin-forms/ I need to return the result from the webservice call ("GetAllProjects") and display in the listview. Appreciate for help.

Can you post the web method called "GetAllProjects" . The return type is not consistent. — Bruno Caceiro
<WebMethod()> _ Public Function GetAllProjects() As List(Of Project) Dim lstProject As New List(Of Project)() lstProject.Add(New Project("1", "Project 1")) lstProject.Add(New Project("2", "Project 2")) lstProject.Add(New Project("3", "Project 3")) Return lstProject End Function — user3655427
This is what you meant? So sorry I am pretty new to Xamarin form and c# in general. — user3655427
Edit your response and put the code there, for readability purposes — Bruno Caceiro

FreakyAli FreakyAli · Accepted Answer · 2019-01-11T14:57:05

If you check the error statement correctly it says IMSr2.Droid.IMSWS.Project[]' to 'int' which clearly means that the method of your Service object by the name of getallprojects returns int

i.e.

 service.GetAllProjects();

Is returning int when it should be returning Project[].

Check return type for GetAllProjects

Xamarin form consume asmx web service

1 Answers