Maui-sHow to save and read data to/from XML ?

Question

Maui-sHow to save and read data to/from XML ?

Dani_S 4,501

Hi,

How to save and read data to/from XML ?

Thanks,

Accepted answer

0 additional answers

Your answer

Answer 1

Anonymous

Hello,

You can use do this by XmlSerializer. XmlSerializer could Write/read XML files element by element.

For example, you can create an object called User.cs, you can add other properties as well.

public class User
{
     public string Name { get; set; }   
}

Then create a List and add new User object like following code.

var users= new List<User>
{
      new User { Name = "Test1" },
      new User { Name = "Test2" }
};

You can save these objects to local XML file.

string filepath = @"c:\temp\users.xml";

using (FileStream fs = new FileStream(filepath, FileMode.OpenOrCreate))
{
     XmlSerializer serializer = new XmlSerializer(users.GetType());
     serializer.Serialize(fs, users);
}

And you can read all of them from XML file.

var getUsers = new List<User>();
using (FileStream fs2 = new FileStream(filepath, FileMode.Open))
{
     XmlSerializer serializer = new XmlSerializer(getUsers.GetType());
     getUsers  = serializer.Deserialize(fs2) as List<User>;
}

Best Regards,

Leon Lu

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Dani_S 4,501 Reputation points

2023-10-20T07:20:00.8133333+00:00

what is usersToStore?
Dani_S 4,501 Reputation points

2023-10-20T07:34:24.03+00:00

Is getUsers?
Anonymous

2023-10-20T08:32:15.2233333+00:00

Yes, I update it.

Dani_S 4,501

Sometimes when loading the xml after few times the xl corupted why ? Do you see nay problem ? Model

 public class LoginUser
 {
     public string Portal { get; set; }
     public string Domain { get; set; }
     public string User { get; set; }

 }

Read

  public void LoadData()
  {
      var loginUserFilePath = ConstantsClientHelper.LoginUserFilePath;
      if (File.Exists(loginUserFilePath))
      {
          var getLoginUsers = new List<LoginUser>();
          using (FileStream fs = new FileStream(loginUserFilePath, FileMode.Open))
          {
              XmlSerializer serializer = new XmlSerializer(getLoginUsers.GetType());
              getLoginUsers = serializer.Deserialize(fs) as List<LoginUser>;
              Portal = getLoginUsers[0].Portal;
              Domain = getLoginUsers[0].Domain;
              User = getLoginUsers[0].User;

          }
      }
  }

Save

 var loginUserFilePath = ConstantsClientHelper.LoginUserFilePath;
  var loginUsers = new List<LoginUser>
  {
      new LoginUser
      {
          Portal = Portal,
          Domain = Domain,
          User = User,
      }
  };
  using (FileStream fs = new FileStream(loginUserFilePath, FileMode.OpenOrCreate))
  {
      XmlSerializer serializer = new XmlSerializer(loginUsers.GetType());
      serializer.Serialize(fs, loginUsers);
  }

Dani_S 4,501 Reputation points

2024-01-24T09:49:38.77+00:00

I omitted The portal/domain/user.Please see at the end of xml is corrupted. <?xml version="1.0" encoding="utf-8"?> <ArrayOfLoginUser xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <LoginUser> <Portal>?????</Portal> <Domain>?????</Domain> <User>????</User> </LoginUser> </ArrayOfLoginUser>rrayOfLoginUser>>inUser>r>
Dani_S 4,501 Reputation points

2024-01-24T09:51:39.25+00:00

I have one user
Dani_S 4,501 Reputation points

2024-01-25T11:39:19.74+00:00

Please answer ? Did you find the problem ?
Anonymous

2024-01-26T05:58:22.12+00:00

rrayOfLoginUser>>inUser>r>

Does above text in the xml as well? If so, without complete xml, it cannot be serializer by XmlSerializer . If not, can your share completely xml? Could you open a new thread for this issue? It will help others who have similar issue to fix issue quickly.
Dani_S 4,501 Reputation points

2024-01-26T10:08:12.24+00:00

The above text in the xml as well. This happened after few saving operations.
Dani_S 4,501 Reputation points

2024-01-30T10:24:35.2733333+00:00

The problem solved in ticket using File.Create instead of FileMode.OpenOrCreate https://learn.microsoft.com/en-us/answers/questions/1515580/xml-corrupted-after-few-operation-of-save-and-load

Share via

Maui-sHow to save and read data to/from XML ?

0 additional answers

Your answer