Question

use ThreadPool.QueueUserWorkItem (WaitCallback, Object) to start a thread with my target method and data. Can I pass more than one data into my method? the second parameter in QueueUserWorkItem (WaitCallback, Object) can be an array?

Answer 1

Here is a example of using a class so you can get strongly typed pramaters

public class CreateUserTaskInfo
{
    public string username { get; };
    public string password { get; };
    public string sqlServer { get; };
    public string database { get; };
    public string practice { get; };
    public RemoteUserManager client { get; };
    public CreateUserTaskInfo(RemoteUserManager cli, string usr, string pass, string sql, string db, string prac)
    {
        client = cli;
        username = usr;
        password = pass;
        sqlServer = sql;
        database = db;
        practice = prac;
    }
}

public void ExampleFunction(...)
{
    //gather up the variables to be passed in
    var taskInfo = new CreateUserTaskInfo(remote, user, password, SqlInstancePath, AccountID, practiceName);

    //queue the background work and pass in the state object.
    ThreadPool.QueueUserWorkItem(new WaitCallback(RemoteUserManagerClient.CreateUser), taskInfo);
}

static public void CreateUser(object stateInfo)
{
    CreateUserTaskInfo ti = (CreateUserTaskInfo)stateInfo;

    //use ti in the method and access the properties, it will be 
    // the same object as taskInfo from the other method
}