CreateConnectionString() returns the server to which you are connecting, and it can return additional parameters. In the QvEventLogConnectorElaborate example, UserId and Password are also sent as parameters to the connect string:
public override string CreateConnectionString()
{
QvxLog.Log(QvxLogFacility.Application, QvxLogSeverity.Debug, "CreateConnectionString()");
var login = CreateLoginWindowHelper();
login.ShowDialog();
string connectionString = null;
if (login.DialogResult.Equals(true))
{
connectionString = String.Format("Server={0};UserId={1};Password={2}",
login.GetServer(), login.GetUsername(), login.GetPassword());
}
return connectionString;
}
The UserId and Password parameters can be used with QvEventLogConnection.cs, where the VerifyCredentials() method is called as a safeguard before the implementation lets the invoking class access any data. In the code example, a parameter is parsed from the connect string for use within the VerifyCredentials() method.
private void VerifyCredentials()
{
string username, password;
this.MParameters.TryGetValue("UserId", out username);
this.MParameters.TryGetValue("Password", out password);
if (username != "InterBlag" || password != "BlagBlag")
{
throw new AuthenticationException("Username and/or passowrd is incorrect");
}
}
Information noteThis example is in no way a guaranteed secure way to deal with user credentials and should only be regarded as a showcase of how to work with the parameters in the connect string.