private async void BtnConnect_ClickAsync(object sender, EventArgs e)
{
if (txtNo.Text == string.Empty)
{
return;
}
ClearDisplayArea();
probrem = await HttpClientManager.ExecuteGetXMLAsync <Probrem>(string.Format(API_AOJ_OLD, ID));
probrem.id = probrem.id.Replace("\n", string.Empty);
probrem.name = probrem.name.Replace("\n", string.Empty);
var responce2 = await HttpClientManager.ExecuteGetJsonAsync <Probrem2>(string.Format(API_AOJ_NEW, ID));
var parser = new HtmlParser();
var doc = parser.ParseDocument(responce2.html);
txtTitle.Text = string.Format("AOJ {0} （{1} : {2}）", ID, probrem.name, doc.QuerySelectorAll("h1")[0].TextContent);
string text = "";
using (StreamReader sr = new StreamReader("ContentsTemplate.txt", Encoding.GetEncoding("UTF-8")))
{
text = sr.ReadToEnd();
}
txtContents.Text = string.Format(text, ID);
}