async Task <XmlDocument> GetExplainDomAsync(string name,
string type,
string expainUrl)
{
// 先看看缓存文件是否存在
string cacheFileName = MakeCacheFileName(name, type);
if (File.Exists(cacheFileName))
{
XmlDocument result = new XmlDocument();
result.Load(cacheFileName);
return(result);
}
else
{
var download_result = await WebClientEx.DownloadStringAsync(expainUrl).ConfigureAwait(false);
File.WriteAllText(cacheFileName, download_result.String, download_result.Encoding);
XmlDocument result = new XmlDocument();
result.LoadXml(download_result.String);
return(result);
}
}
