private bool TryConnect(FullInstanceName name, User user)
{
SqlConnection connection = new SqlConnection(ConfigurateConnection(name, user));
try
{
connection.Open();
Notify(name, true);
connection.Close();
return(true);
}
catch (SqlException)
{
return(false);
}
}
private void Notify(FullInstanceName name, bool status)
{
string dataSourse, msg;
if (name.InstanceName == null)
{
dataSourse = name.HostName;
}
else
{
dataSourse = string.Format("{0}\\{1}", name.HostName, name.InstanceName);
}
msg = status ? "Has been successfully connected to instance " : "Couldn't connect to instance ";
msg = string.Concat(msg, dataSourse);
Logger.WriteLog(LogLevel.Debug, msg);
}
//Configuring connection using Integrated Security
private string ConfigurateConnection(FullInstanceName name)
{
string instName = name.InstanceName;
if (string.IsNullOrEmpty(instName))
{
instName = "SQLEXPRESS";
}
string dataSourse = string.Format("{0}\\{1}", name.HostName, instName);
SqlConnectionStringBuilder stringBuilder = new SqlConnectionStringBuilder
{
DataSource = dataSourse,
IntegratedSecurity = true,
ConnectTimeout = 5
};
return(stringBuilder.ConnectionString);
}
//Configuring connection using SQL Authentication
private string ConfigurateConnection(FullInstanceName name, User user)
{
string dataSourse;
if (name.InstanceName == null)
{
dataSourse = name.HostName;
}
else
{
dataSourse = string.Format("{0}\\{1}", name.HostName, name.InstanceName);
}
SqlConnectionStringBuilder stringBuilder = new SqlConnectionStringBuilder
{
DataSource = dataSourse,
IntegratedSecurity = false,
UserID = user.Name,
Password = user.Password,
ConnectTimeout = 5
};
return(stringBuilder.ConnectionString);
}
internal Instance GetInstanceData(FullInstanceName name, List <User> users)
{
Instance instance = new Instance
{
HostName = name.HostName,
InstanceName = name.InstanceName,
Status = 0,
UserId = null
};
//Connecting without credentials in case SQL server instance has a windows authentication mode set
//and using same credentials
//If connection is successful, we get information about instance and create instance object
if (TryConnect(name))
{
instance.Status = 1;
instance.InstanceName = "SQLEXPRESS";
return(instance);
}
//Trying the User credentials from the Users Table
if (users == null || users.Count == 0)
{
return(instance);
}
foreach (User user in users)
{
if (!TryConnect(name, user))
{
continue;
}
instance.Status = 1;
instance.UserId = user.Id;
return(instance);
}
Notify(name, false);
return(instance);
}