C# 从SQL Server中提取XML数据以在C中解析为JSON格式问题

我在C中使用SQLCommand对将输出XML的本地计算机运行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')";

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

这一直有效，但我最近发现了一个致命的缺陷。如果客户在数据库中购买了多个项目，那么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语言中解析XML输出，它将无法完成，输出将导致多个根元素。我怀疑是各种表的连接导致了这种情况，但我必须从SQL中提取各种数据，我需要这些连接才能得到我需要的

我试着做类似的事情：

   ' '                          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,

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

我将联接嵌套到另一个select中。虽然这确实有效，但在转换为JSON时格式不正确。输出如下所示：

"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')";

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

我的预期输出将在{receive:中组织所有数据，而不使用另一个{。类似于此：

   ' '                          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,

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

收据是一个大得多的JSON文件的一个子部分。但是，我认为对于我需要获取的其余数据，该漏洞将被复制，因为我也需要对这些数据进行连接。我尝试使用Jayrock和Newtonsoft.JSON，但两者都存在此问题

我的目标XML输出是：

<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代码得到这个输出，但是相同的信息在之后重复，这引发了我提到的异常

---

这是可能的还是致命的设计缺陷？如果不可能，我不确定如何完成此任务。谢谢。

看起来您正在序列化返回到同一XML的每一行-因此您将得到多个根元素。您需要序列化列表本身

所以你最终会得到：

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

---

看起来您正在序列化返回到同一XML的每一行-因此您将得到多个根元素。您需要序列化列表本身

所以你最终会得到：

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

---

只是一个建议：您似乎在询问XML到JSON的转换。这与SQL无关！删除SQL并添加将XML转换为JSON的代码如何？这确实与SQL有关。请重新阅读我的问题，我正在使用Jayrock和Newtonsoft.JSON对众所周知且可用的两种格式进行序列化。问题是：与XML->JSON无关，它是SQL代码的XML输出，具有多个根元素，因此在加载doc.LoadXMLxml时引发XmlException。更不用说格式不正确的XML意味着格式不正确的JSON，GIGO。如果问题出在SQL Server生成的XML中。发布您希望查询返回的内容，去掉JSON的东西。你甚至可以举一个例子，如果你有多个根元素，为什么不使用基本的字符串操作和文件IO例程将它们封装在一个根元素中呢？我已经添加了我想要查询返回的XML。查询当前将返回该XML，但重复相同数量的数据与客户购买的商品数量相同倍，使用XMLDocument类处理时会引发多个根元素异常。只是一个建议：您似乎在询问XML到JSON的转换。这与SQL无关！删除SQL并添加将XML转换为JSON的代码如何？这必须要做的是：重新阅读我的问题，我正在使用Jayrock和Newtonsoft.Json来序列化这两个众所周知且可用的文件。问题不在于XML->Json，而是SQL代码的XML输出具有多个根元素，从而在加载doc.LoadXMLxml时引发XmlException。更不用说格式不正确了XML是指格式不正确的JSON，GIGO。如果问题出在SQL Server生成的XML中。发布您希望查询返回的内容，并删除JSON内容。您甚至可以设置一个示例，说明如果您有多个根元素，为什么不使用基本的字符串操作和文件IO例程将它们包装在一个根元素中？我知道我添加了我希望查询返回的预期XML。该查询当前将返回该XML，但重复次数与客户购买的商品数量相同，使用XMLDocument类处理时会引发多个根元素异常。