需要将示例VB.NET Object转换为JSON

时间:2012-11-08 21:20:32

标签: .net sql json

尝试使用SQL调用从.asmx页面获取纯JSON。似乎无法得到它。我找到的每个帖子都是在c#中,或者不是我在追求的。序列化导致一维数组问题。我需要从我的Web服务器上的MS访问数据库获取数据,以获得小型Java应用程序。

<%@ WebService class="GetDBStudent" %>

Imports System.Web
Imports System.Web.Services
Imports System.Xml
Imports System.Web.Services.Protocols
Imports System.Web.Script.Services
Imports System.Data
imports System.Web.Script.Serialization

'<System.Web.Script.Services.ScriptService()> _
<WebService(Namespace:="com.mcfrsit.GetDBStudent")> _
<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
Public Class GetDBStudent
Inherits System.Web.Services.WebService
Public Class Students
    Public StudentID As String
    Public LastName As String
    Public FirstName As String
    Public Affiliation As String
    Public ClassName As String
    Public DateCompleted As DateTime
End Class

<WebMethod()> _
<ScriptMethod(UseHttpGet:=False, ResponseFormat:=ResponseFormat.Json)> _
Public Function GetArray() As Students()

    ' Create a connection string
    Dim DBConnection As String =        ConfigurationManager.ConnectionStrings("OdbcServices").ToString
    Dim sql As String = "SELECT * FROM ClassRecordsEnrollmentsQry WHERE [Affiliation] = 'DFRS'"
    Dim Conn As New ADODB.Connection()
    Dim rs As New ADODB.Recordset()

    Dim daTitles As New Data.OleDb.OleDbDataAdapter()

    Dim dsTitles As New DataSet("CrossTab")
    Conn.Open(DBConnection, "", "", -1)

    Try
        rs.Open(sql, DBConnection, ADODB.CursorTypeEnum.adOpenStatic, ADODB.LockTypeEnum.adLockBatchOptimistic, 1)

        daTitles.Fill(dsTitles, rs, "Students")
        'create object array, using row count as upper dim
        Dim objStudents As Students() = New Students(dsTitles.Tables(0).Rows.Count - 1) {}

        'loop through dataset to add data to object array
        Dim intRsCount As Int16
        For intRsCount = 0 To dsTitles.Tables(0).Rows.Count - 1
            Dim intCsCount As Int16
            For intCsCount = 0 To dsTitles.Tables(0).Columns.Count - 1
                'Dim strColName As String = dsTitles.Tables(0).Columns(intCsCount)
            Next
            objStudents(intRsCount) = New Students
            objStudents(intRsCount).StudentID = dsTitles.Tables(0).Rows(intRsCount)(0)
            objStudents(intRsCount).LastName = dsTitles.Tables(0).Rows(intRsCount)(1)
            objStudents(intRsCount).FirstName = dsTitles.Tables(0).Rows(intRsCount)(2)
            objStudents(intRsCount).Affiliation = dsTitles.Tables(0).Rows(intRsCount)(3)
            objStudents(intRsCount).ClassName = dsTitles.Tables(0).Rows(intRsCount)(4)
            objStudents(intRsCount).DateCompleted = dsTitles.Tables(0).Rows(intRsCount)(5)
        Next

        'Return new JavaScriptSerializer().Serialize(objStudents)
        Return objStudents

    Catch ex As Exception
        'Response.Write("Sorting is not supported in the view")
    Finally
        Conn.Close()
    End Try
End Function


End Class

1 个答案:

答案 0 :(得分:0)

解决:返回函数作为对象并且工作正常......

但是返回的JSON字符串如下所示:

[{"text":"text2"}]

为什么额外的“[”和“]”在开头和结尾?