拒绝访问XML文件的路径

Question

So I'm currently working on an ASP.NET project. It requires me to write a List<> onto a XML file. I created a "data.xml" file within the project folder and here are my few lines of code:

XmlSerializer serializer = new XmlSerializer(typeof(List<BookItem>));
TextWriter filestream = new StreamWriter("data.xml");
serializer.Serialize(filestream, book);
filestream.Close();

Everything runs smoothly until the "write-data-to-xml-file" part. I encountered this issue:

System.UnauthorizedAccessException: 'Access to the path 'C:\Program Files (x86)\IIS Express\data.xml' is denied.'

Am I missing any setting or should I include any tricky line of code?

Answer 1

Maybe you have trouble overwriting the .xml. Is it open somewhere, eg your IDE? If not, do you have permission to overwrite it? Try deleting it and see if your code executes.

Answer 2

you need to do two things

1- go to your file and change security permission and allow full control, modify, read, and write.

2- go to task manager and end data.xml .

Change this line

TextWriter filestream = new StreamWriter("data.xml"); 

into this

 TextWriter filestream = new StreamWriter(@"fullpath");

Answer 3

尝试放置特定的文件位置，例如c：\\ data.xml，因为我认为原因是因为它无法写入默认位置。

TextWriter filestream = new StreamWriter(@"c:\data.xml");

Answer 4

Ok, some small problems

new StreamWriter("data.xml");

you have not specified full path and IIS try to create in relative path that is run and your IIS user has not sufficient privileges to create this file or modify existing file with the same name. you can

Server.Map("~")

to get your running website path and create a custom path for creating your files