Question

我在C＃中使用SQLCommand来对将输出XML的本地机器运行SQL。 SQL代码如下所示：

"SELECT 
   ' '                          AS 'ItemsCount', 
   ' '                          AS 'Shipping', 
   ' '                          AS 'Fee', 
   ' '                          AS 'ShippingPrc', 
   ' '                          AS 'FeeType', 
   ' '                          AS 'FeeTaxPrc', 
 //many lines of SQL omitted
 FROM   im_item 
   JOIN ps_doc_lin 
     ON im_item.item_no = ps_doc_lin.item_no 
   JOIN  ps_doc_hdr 
     ON ps_doc_hdr.doc_id = ps_doc_lin.doc_id 
   JOIN ar_cust 
   ON ar_cust.cust_no = ps_doc_hdr.cust_no 
 WHERE  ps_doc_hdr.tkt_dt = (SELECT Max(tkt_dt) //I select Max(tkt_dt) here because this program will run right after a customer has completed checkout.  I want to get the most recent ticket (i.e. the ticket just rang up)
                        FROM   ps_doc_hdr) 
 FOR xml path ('Receipt')";

这一直有效，但我最近发现了一个致命的缺陷。如果在数据库中客户购买了多个项目，则SQL Server的XML输出将是一个XML文件，其中每个购买的项目都会重复该客户的信息。如果我在C＃中解析XML输出无法完成，则输出会产生多个根元素。我怀疑各种表的JOIN导致了这种情况，但我不得不从SQL中提取各种数据，我需要这些连接来获得我需要的东西。

我尝试做类似的事情：

   ' '                          AS 'Total', 
   ' '                          AS 'InvcHdrRcptStatus', 
   ' '                          AS 'InvcHdrRcptType', 
   ' '                          AS 'Cashier', 
   ' '                          AS 'DocDate', 
   ' '                          AS 'InvcNum', 
   (SELECT      ps_doc_lin.sls_rep           AS 'Clerk'
                    FROM PS_DOC_LIN
                    WHERE PS_DOC_LIN.DOC_ID = PS_DOC_HDR.DOC_ID
                    FOR XML PATH ('Item')) as Items, 
   (SELECT     ar_cust.cust_no              AS 'BillToCustNumber', 
   ' '                          AS 'BillToCustCompany', 
   ar_cust.fst_nam              AS 'BillToFName', 
   ar_cust.lst_nam              AS 'BillToLName', 
   ar_cust.salutation           AS 'Customer/Name/Title', 
   ar_cust.adrs_1               AS 'BillToAddr1', 
   ar_cust.adrs_2               AS 'BillToAddr2', 
   ' '                          AS 'BillToAddr3', 
   ar_cust.zip_cod              AS 'BillToZip', 
   ' '                          AS 'BillToInfo1', 
   ' '                          AS 'BillToInfo2', 
   ' '                          AS 'BillToPhone1', 
   ' '                          AS 'BillToPhone2', 
   ar_cust.phone_1              AS 'ShipToPhone1', 
   ar_cust.phone_2              AS 'ShipToPhone2' FROM AR_CUST WHERE AR_CUST.CUST_NO = PS_DOC_HDR.CUST_NO FOR XML PATH ('Customer'), TYPE) as Customers,

我将JOIN嵌套到另一个选择中。虽然这确实有效，但在转换为JSON时它没有正确格式化。输出如下：

{"Receipt":{ ......//omitted data
 ,"Customer":{"Name: {"title":"Mr."}}

我的预期输出将在{“收据”内部组织所有数据：不使用另一个{。与此类似：

    "Receipt" : {
    "InvcHdrNotes" : ""
    "Tax" : ""
    "TaxPrc" : ""
    "DiscPrc" : ""
    "Discount" : ""
    "InvcComment1" : ""
    "InvcComment2" : ""
}

“收据”是更大的JSON文件的子部分。但是，这个缺陷将被复制（我假设如此），因为我需要JOIN来获取剩余的数据。我尝试过使用Jayrock和Newtonsoft.Json，但都有这个问题。

我的目标XML输出将是：

<Receipt>
<InvcHdrNotes> </InvcHdrNotes>
<Tax>Y</Tax>
<Clerk>MGR</Clerk>
<BillToCustNumber>1000</BillToCustNumber>
<BillToCustCompany> </BillToCustCompany>
<BillToFName>Bill</BillToFName>
<BillToLName>Baker</BillToLName>
<Customer>
  <Name>
    <Title>Mr.</Title>
  </Name>
</Customer>
<BillToAddr1>1426 Millstream Parkway</BillToAddr1>
<BillToAddr3> </BillToAddr3>
<BillToZip>38120</BillToZip>
<BillToInfo1> </BillToInfo1>
<BillToInfo2> </BillToInfo2>
<ShipToCustNumber>1000</ShipToCustNumber>
<ShipToCustCompany> </ShipToCustCompany>
<ShipToFName>Bill</ShipToFName>
<ShipToLName>Baker</ShipToLName>
<ShipToTitle>Mr.</ShipToTitle>
<ShipToAddr1>1426 Millstream Parkway</ShipToAddr1>
<ShipToZip>38120</ShipToZip>
</Receipt>

我使用上面的SQL代码获得此输出，但是在抛出我提到的异常之后重复相同的信息。

这是否可能或这是一个致命的设计缺陷？如果不可能，我不确定如何完成这项任务。谢谢。

Answer 1

看起来你正在序列化返回到同一XML的每一行 - 所以你最终会得到多个根元素。您需要序列化List本身。

所以你最终得到了：

<Receipts>
  <Receipt>
    ...
  </Receipt>
  <Receipt>
    ...
  </Receipt>
</Receipts>

从SQL Server中提取XML数据以解析为C＃中的JSON格式问题

1 个答案: