WCF不反序列化JSON输入
我有一个WCF服务定义如下：
Imports System.ServiceModel Imports System.ServiceModel.Web Public Interface ILayoutService Sub SaveLayout(ByVal layout As Layout) Function GetLayout() As Layout End Interface Layout类定义为：
Imports System.Runtime.Serialization Public Class Layout Public Property Columns As New List(Of ContentColumn) End Class Public Class ContentColumn Public Property Name As String = "Column Name" Public Property Position As Integer Public Property Modules As New List(Of ContentModule) End Class Public Class ContentModule Public Property Name As String = "Module Name" Public Property Position As Integer End Class
ILayoutService的实现如下：
Imports System.ServiceModel.Activation Imports System.Web.Script.Serialization Public Class LayoutService Implements ILayoutService Public Sub SaveLayout(ByVal layout As Layout) Implements ILayoutService.SaveLayout Dim l As New Layout Dim left, center, right As New ContentColumn left.Name = "Left Column" left.Position = 0 center.Name = "Center Column" center.Position = 1 right.Name = "Right Column" right.Position = 2 Dim topLeft, centerLeft, bottomLeft, topCenter, centerCenter, bottomCenter, topRight, centerRight, bottomRight As New ContentModule topLeft.Name = "Top Left" topLeft.Position = 0 centerLeft.Name = "Center Left" centerLeft.Position = 1 bottomLeft.Name = "Bottom Left" bottomLeft.Position = 2 topCenter.Name = "Top Center" topLeft.Position = 0 centerCenter.Name = "Center Center" centerCenter.Position = 1 bottomCenter.Name = "Bottom Center" bottomCenter.Position = 2 topRight.Name = "Top Right" topRight.Position = 0 centerRight.Name = "Center Right" centerRight.Position = 1 bottomRight.Name = "Bottom Right" bottomRight.Position = 2 left.Modules.Add(topLeft) left.Modules.Add(centerLeft) left.Modules.Add(bottomLeft) center.Modules.Add(topCenter) center.Modules.Add(centerCenter) center.Modules.Add(bottomCenter) right.Modules.Add(topRight) right.Modules.Add(centerRight) right.Modules.Add(bottomRight) l.Columns.Add(left) l.Columns.Add(center) l.Columns.Add(right) Dim json As New JsonResult json.Data = l Dim serializer As New JavaScriptSerializer Dim output = serializer.Serialize(json.Data) End Sub Public Function GetLayout() As Layout Implements ILayoutService.GetLayout Dim l As New Layout Dim c As New ContentColumn Dim m As New ContentModule c.Modules.Add(m) l.Columns.Add(c) Return l End Function End Class
我实现了SaveLayout()因此我可以得到将被（de）序列化的文字JSON。 我正在使用它来测试通过jQuery调用此服务：
$(document).ready(function () { $("#saveLayout").click(function () { var layout = buildLayout(); var jsonLayout = $.toJSON(layout); $.ajax({ type: "POST", contentType: "application/json; charset=utf-8", dataType: "json", url: "/Services/LayoutService.svc/SaveLayout", data: jsonLayout, dataType: "json", success: function (result) { alert(result.d.Columns[0].Name); }, error: function (xhr, ajaxOptions, thrownError) { var jsonFault = JSON.parse(xhr.responseText); alert(jsonFault.Message); } }); return false; }); }); function buildLayout() { var layout = { "Columns": [ { "Name": "Left Column", "Position": 0, "Modules": [ { "Name": "Top Left", "Position": 0 }, { "Name": "Center Left", "Position": 1 }, { "Name": "Bottom Left", "Position": 2}] }, { "Name": "Center Column", "Position": 1, "Modules": [ { "Name": "Top Center", "Position": 0 }, { "Name": "Center Center", "Position": 1 }, { "Name": "Bottom Center", "Position": 2}] }, { "Name": "Right Column", "Position": 2, "Modules": [ { "Name": "Top Right", "Position": 0 }, { "Name": "Center Right", "Position": 1 }, { "Name": "Bottom Right", "Position": 2}] }] }; return layout; }
buildLayout()返回的布局是VB代码中serialize()调用返回的确切JSON。 出于某种原因，当我调用Web服务时， SaveLayout()的输入参数layout为Nothing。 反序列化必定会失败。 知道为什么吗？
很难从你提供的细节中分辨出来。
这是我的建议：
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在服务端启用跟踪，生成跟踪日志，并使用SvcTraceViewer进行分析。 为此，请按照此MSDN文章中有关使用服务跟踪查看器的说明进行操作 。
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打开调试例外。 这可以通过输入includeExceptionDetailInFaults来完成， 您可以按照此处的说明进行操作 。
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使用Fiddler监控客户端和服务端的线路流量。
一般来说，一旦你这样做，你应该有更多关于服务方面什么是时髦的信息，并且可以很快地诊断问题。 试试吧，请报告回来！ 🙂