在C#中的用户界面上显示之前修改xml值

本文关键字：修改 xml 显示 用户界面 | 更新日期: 2023-09-27 18:21:28

我的c#程序读取一个xml并将其加载到xmldocument中。我需要解密银行账号和排序码元素，然后才能在用户界面中显示。这是xml。

 <Fatca xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://tempuri.org/TaskDetails.xsd">
    <AccountNumber>BI830418</AccountNumber>
      <AccountDetails>
        <AccountName>SIPP - Mr. t test</AccountName>
        <AccountNumber>BI830418</AccountNumber>
        <AccountID>83041</AccountID>
        <BankAccountDetails>
          <BankAccountID>23943</BankAccountID>
          <ContactID>2106175</ContactID>
          <BankAccountName>dffdf</BankAccountName>
          <BankAccountNumber>N14yKOOmpdmh23fmp7oNvg==</BankAccountNumber>
          <BankAccountType>0</BankAccountType>
          <BankSortCode>tz7r+uYFL6Ff86mI/mwJOQ==</BankSortCode>
          <Active>true</Active>
        </BankAccountDetails>
        <Active>true</Active>
      </AccountDetails>
      <Request>
        <AccountID>83041</AccountID>
      </Request>
    </Fatca>

我的c代码逻辑如下。我得到对象引用错误。你能告诉我这里错在哪里吗？

document.XPathSelectElement（"//BankAccountDetails/BankAccountNumber"）.Value="Test"；

在C#中的用户界面上显示之前修改xml值

命名空间给您带来了问题。我更喜欢使用XMLLinq（XDocument）。它将更容易排序和过滤

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string xml =
                "<Fatca xmlns:xsi='"http://www.w3.org/2001/XMLSchema-instance'" xmlns:xsd='"http://www.w3.org/2001/XMLSchema'" xmlns='"http://tempuri.org/TaskDetails.xsd'">" +
                "<AccountNumber>BI830418</AccountNumber>" +
                  "<AccountDetails>" +
                    "<AccountName>SIPP - Mr. t test</AccountName>" +
                    "<AccountNumber>BI830418</AccountNumber>" +
                    "<AccountID>83041</AccountID>" +
                    "<BankAccountDetails>" +
                      "<BankAccountID>23943</BankAccountID>" +
                      "<ContactID>2106175</ContactID>" +
                      "<BankAccountName>dffdf</BankAccountName>" +
                      "<BankAccountNumber>N14yKOOmpdmh23fmp7oNvg==</BankAccountNumber>" +
                      "<BankAccountType>0</BankAccountType>" +
                      "<BankSortCode>tz7r+uYFL6Ff86mI/mwJOQ==</BankSortCode>" +
                      "<Active>true</Active>" +
                    "</BankAccountDetails>" +
                    "<Active>true</Active>" +
                  "</AccountDetails>" +
                  "<Request>" +
                    "<AccountID>83041</AccountID>" +
                  "</Request>" +
                "</Fatca>";
            XElement fatca = XElement.Parse(xml);
            XNamespace ns = fatca.Name.Namespace;
            string bankAccountNumber = fatca.Descendants(ns + "BankAccountNumber").FirstOrDefault().Value;
        }
    }
}
​

您需要添加名称空间。

XPathSelectElement的信用总是返回空

var xmlReader = XmlReader.Create(new StringReader(xml)); // Or whatever your source is, of course.
var myXDocument = XDocument.Load(xmlReader);
var namespaceManager = new XmlNamespaceManager(xmlReader.NameTable); 
namespaceManager.AddNamespace("prefix", "http://tempuri.org/TaskDetails.xsd"); // We add an explicit prefix mapping for our query.
XElement fatca = XElement.Parse(xml);
fatca.XPathSelectElement("//prefix:BankAccountNumber", namespaceManager).Value = "asd";
Console.WriteLine(fatca.ToString());
​

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