private void button2_Click(object sender, EventArgs e) { richTextBox2.Text = "等待中..."; if (comboBox2.Text == "") { return; } String result = connector.GetStringWithUrl(baseUrl, "api_lottery.php?action=getTheLatestLottery&group_name=" + comboBox2.SelectedItem.ToString()); richTextBox2.Text = result; JObject jObject = connector.StringConvertJObj(result); if (jObject == null) { return; } if (jObject["data"]["state"].Value <string>() == "success") { textBox6.Text = textBox4.Text = textBox5.Text = textBox2.Text = textBox1.Text = jObject["data"]["lottery_no"].Value <string>(); } }