Question

WebService, returning string or object

Asked by: Cannibal_Jack

Hi, I'm using asp.net and vb.net. I have just written my first web service and I've run into a few problems. The service itself receives a string (a personal ID number) and searches an SQL database for a match and then displays the person's information that matches the string. Here's what I have...

        Dim Connection As String = "Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Test\TestService\ Database.mdf;Integrated Security=True;User Instance=True"

        Dim ConnA As New Data.SqlClient.SqlConnection(Connection)
        ConnA.Open()
        Dim SQLC As String = "SELECT * FROM Personal WHERE PNum = '" & StringNum & "'"
        Dim dataAdap As New Data.SqlClient.SqlDataAdapter(SQLC, Conna)
        Dim dataset As New Data.DataSet
        da.Fill(ds, "Personal")
        ConnA.Close()
        Dim MyObject As Object
        MyObject = dataset
       
        Return MyObject

I have added the service to my site project as a reference and I have a textbox to enter the string and a button to call the service. The problem is with the web service I think, I can only return a string when I wish to return an object with results in it. When I run it and enter info in the textbox and click the button it tells me I need to pass a string not an object. Can someone give me some advice and help me solve this?
Any help would be great, thanks.

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Asked On
2008-04-02 at 13:35:32ID23290828
Tags

VB.NET ASP.NET

Topics

Server Side Includes (SSI)

,

Microsoft Visual Basic.Net

,

Programming for ASP.NET

Participating Experts
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Answers

 

by: McExpPosted on 2008-04-02 at 14:06:57ID: 21267544

Assuming your Web service needs to only return one result you can return a Structure otherwise youi will need an array of structures, see below for an example

    Structure Employee
        'declaring a structure named Employee
        Dim EmpName As String
        Dim EmpDesignation As String
        Dim EmpCity As String
        Dim EmpSal As Double
        Dim EmpId As Integer
        'declaring five fields of different data types in the structure
    End Structure
 
    <WebMethod()> _
    Public Function Testing() As Employee
        Dim san As New Employee()
        'creating an instance of Employee
        san.EmpName = "Sandeep"
        san.EmpDesignation = "Software Developer"
        san.EmpCity = "Sydney"
        san.EmpSal = 60000
        san.EmpId = 2707
        Return san
    End Function

                                              
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by: Cannibal_JackPosted on 2008-04-02 at 14:13:49ID: 31445387

Thanks I hadnt thought of it like that,

20120131-EE-VQP-002

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