无法将更改保存在XML文件中 [英] Unable to save the changes in XML file

问题描述

当我尝试保存XML文件时，我遇到了问题，我将XML文件存储在Assets文件夹中，并将构建操作设置为Android Assets，但是当xml.Save("Q317664.xml")时； 出现异常行System.UnauthorizedAccessException:拒绝访问路径"/Q317664.xml".我不确定为什么会发生这种情况

i am facing problem when i try to save the XML file i store the XML file in Assets folder and set build action to Android Assets but when xml.Save("Q317664.xml"); line comes it gives exception System.UnauthorizedAccessException: Access to the path "/Q317664.xml" is denied.i am not sure why this is occurring

using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using System.IO;
using System.Reflection;
using Android.Content.Res;
using System.Xml;
using System.Xml.Linq;
using System.Xml.XPath;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace App17
{
[Activity(Label = "App17", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity
{
    int count = 1;

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.Main);

        // Get our button from the layout resource,
        // and attach an event to it
        var xml = XDocument.Load(Assets.Open("Q317664.xml"));
        var node = xml.Descendants("Book").FirstOrDefault(cd => cd.Attribute("Id").Value == "1");
        node.SetAttributeValue("ISBN", "new");
        xml.Save("Q317664.xml");
     //   Button button = FindViewById<Button>(Resource.Id.MyButton);

       // button.Click += delegate { button.Text = string.Format("{0} clicks!", count++); };
    }
}
}

推荐答案

在Xamarin Android中

In Xamarin Android

var path = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
var filename = Path.Combine(path, "myFile.xml");

File.WriteAllText(filename,xml.ToString());

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