Question

我已经检查了与我的问题相关的所有问题，但没有一个问题可以解决我的问题。我的问题是我需要使用XPath比较两个XML节点值。下面是XML

<ExtenProp>
 <GenericField>
  <FieldKey>IsDiscount</FieldKey> 
  <FieldValue>True</FieldValue> 
  <Namespace /> 
  <ExtendedProperties /> 
</GenericField>

我需要检查IsDiscount是否可用，然后值为true。我试着像这样检查

//do:OrderForms/do:OrderForm/do:ExtendedProperties/do:GenericField[FieldKey="IsDiscount" and FieldValue="True"]

并检查这是否等于true，但这不起作用。任何人都可以解释原因吗？

Answer 1

您使用该XPath表达式正确。我怀疑问题只是缺少前缀 - 我想在FieldKey和FieldValue上映射到默认名称空间URI：

...../do:GenericField[do:FieldKey="IsDiscount" and do:FieldValue="True"]

Answer 2

您必须从子元素中获取实际文本内容：

    private void downloadByteStreamAsFile(Byte[] bytes, String fileName)
    {
        fileName = fileName.Replace(" ", "_");

        System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
        response.Clear();

       if( fileName.Contains(".pdf")){
            fileName = HttpUtility.UrlEncode(fileName);
            //response.Flush(); //comment this or else no file returned
            response.AddHeader("Content-Type", "application/pdf");
            response.AddHeader("Content-Disposition",
                "attachment; filename=" + fileName + "; size=" + bytes.Length.ToString());

            response.BinaryWrite(bytes);
            response.Flush();
            response.End();
        } else {
            //response.Flush(); //comment this or else no file returned
            response.AddHeader("Content-Type", "binary/octet-stream");
            response.AddHeader("Content-Disposition",
                "attachment; filename=" + fileName + "; size=" + bytes.Length.ToString());

            response.BinaryWrite(bytes);
            response.Flush();
            response.End();

        }
    }

或

…/do:GenericField[do:FieldKey/text()="IsDiscount" and do:FieldValue/text()="True"]

使用Xpath比较两个xml字段

2 个答案: