C# 公共类 - “由于其保护级别而无法访问。只能处理公共类型。”
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Public Class - "is inaccessible due to its protection level. Only public types can be processed."
提问by Thad Blankenship
I am doing a test project to learn about XML serialization of an object, and I am getting an odd runtime error:
我正在做一个测试项目来了解对象的 XML 序列化，但我收到了一个奇怪的运行时错误：
namespace SerializeTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void serializeConnection(Conn connection)
{
XmlSerializer serializer = new XmlSerializer(typeof(Conn));
TextWriter textWriter = new StreamWriter(@"serialized.xml");
serializer.Serialize(textWriter, connection);
textWriter.Close();
}
static List<Conn> deserializeConnection()
{
XmlSerializer deserializer = new XmlSerializer(typeof(List<Conn>));
TextReader textReader = new StreamReader(@"serialized.xml");
List<Conn> connectionList;
connectionList = (List<Conn>)deserializer.Deserialize(textReader);
textReader.Close();
return connectionList;
}
private void btnSerialize_Click(object sender, EventArgs e)
{
Conn conn = getConnection();
serializeConnection(conn);
}
private Conn getConnection()
{
Conn connection = new Conn();
connection.connectionName = txtName.Text;
connection.address = txtAddress.Text;
connection.height = 2542;
connection.width = 4254;
connection.password = txtPassword.Text;
connection.smartSizing = false;
connection.username = txtUsername.Text;
connection.port = 474;
return connection;
}
private void btnDeserialize_Click(object sender, EventArgs e)
{
int count = deserializeConnection().Count;
lblStatus.Text = "Count: " + count;
}
}
class Conn
{
public Conn()
{
}
public string connectionName { get; set; }
public int height { get; set; }
public int width { get; set; }
public string address { get; set; }
public string username { get; set; }
public string password { get; set; }
public int port { get; set; }
public bool smartSizing { get; set; }
}
}
The Class is public - I don't understand what could be causing this error. Any help would be appreciated.
课程是公开的 - 我不明白是什么导致了这个错误。任何帮助，将不胜感激。
采纳答案by Jon Skeet
The Class is public
班级是公开的
No it's not. Here's the declaration:
不，这不对。这是声明：
class Conn
{
...
}
You haven't specified any access modifiers, so it's defaulting to internal(assuming it's non-nested). Just because it's got a public constructor doesn't make it public. You need to make it public explicitly:
您尚未指定任何访问修饰符，因此默认为internal（假设它是非嵌套的）。仅仅因为它有一个公共构造函数并没有使它公开。您需要明确公开：
public class Conn
{
...
}
