我有一个PageMethod和一个对该方法的AJAX调用,它传递了一系列产品SKU和请求的SKU数量。它在DEV(IIS7)中工作得很好,但在PROD(IIS6)中返回500错误:
Message: Object reference not set to an instance of an object.
StackTrace: at ViewProduct.GetInventory(List`1 orderedSkus)
ExceptionType: System.NullReferenceException
这是相关代码。如果您需要我的web.config中的特定代码段,我也可以抓住它们,虽然我没有看到任何会对任何事情产生影响的内容。
我试图在PageMethod,orderedSkus As Object()和orderedSkus As List(Of Object)中使用两个不同的Object定义。相同的差异,但同样的结果......空引用。
AJAX:
var editedSkus = [];
function checkInventory() {
editedSkus.length = 0;
var textBoxes = $('input:text', '.table-orderMatrix');
if (formEdited(textBoxes)) {
var DTO = { 'orderedSkus': editedSkus };
$.ajax({
type: "POST",
url: BasePath + "ViewProduct.aspx/GetInventory",
data: JSON.stringify(DTO),
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function (msg) {
var skus = msg.d;
$.each(skus, function () {
//do stuff
});
}
});
} else {
// Do other stuff
}
}
var formEdited = function (textBoxes) {
var edited = 0;
$.each(textBoxes, function (i) {
if (this.value > 0) {
var sku = {};
sku.skuNumber = $(this).prev().val();
sku.orderAmount = this.value;
editedSkus.push(sku);
edited += 1;
}
});
return edited;
}
PageMethod的:
<WebMethod()> _
Public Shared Function GetInventory(orderedSkus As List(Of Object)) As List(Of Object)
Dim _skus As SKUCollection
Dim _sku As SKU = Nothing
Dim warnings As New List(Of Object)
Dim qty As Integer
_skus = CurrentStyle.SKUs
For Each _orderedSku As Object In orderedSkus
Dim dicValues As New Dictionary(Of String, Object)()
dicValues = DirectCast(_orderedSku, Dictionary(Of String, Object))
Dim orderedSkuNumber As String = dicValues("skuNumber").ToString()
Dim orderAmount As String = CType(dicValues("orderAmount"), Integer)
Try
'Stuff
Catch ex As Exception
'Health Monitoring
End Try
Next
Return warnings
End Function
编辑:添加我们的DEV服务器运行IIS7(页面方法有效)的“次要细节”,而PROD仍然在IIS6下(它没有)。我知道......不要让我开始。加上这个因为我觉得它可能对这种情况有意义。
答案 0 :(得分:1)
我明白了。对象被传递得很好。然而,一些代码在PROD中的Try ... Catch失败,在DEV中运行良好(这与AJAX调用完全无关)。反过来,我没有提供适当的错误消息(即使在Catch中添加了一些错误处理后),我只是收到了我发送的对象为空的错误。很奇怪,但你去了。