private void btnTestConnect_Click(object sender, EventArgs e) { string SQLServer = txtSQLServer.Text; if (!validateTestCon()) { MessageBox.Show("Please fill SQL Server or username, password"); } if (chbWindowAuth.Checked) { connector = new SQLConnector(SQLServer); } else { connector = new SQLConnector(SQLServer, txtUserName.Text, txtPassWord.Text); } if (!connector.CheckConnection()) { MessageBox.Show("Please check your information filled"); btnTestConnect.Text = "Test Connection"; return; } DataTable catelog = connector.GetCatalogList(); txtCatalog.DataSource = catelog; txtCatalog.DisplayMember = "name"; txtCatalog.Enabled = true; }