/// <summary>
/// 获取必应新闻列表
/// </summary>
/// <param name="query">搜索关键词</param>
/// <param name="count">数量</param>
/// <param name="offset">偏移量</param>
/// <param name="market">地区</param>
/// <param name="freshness">时间频率</param>
/// <returns></returns>
public static async Task <List <BingNewsEntity> > GetNewsSearchResults(string query, int count = 20, int offset = 0, string market = "zh-CN", string freshness = "Day")
{
var articles = new List <BingNewsEntity>();
try
{
HttpResponseMessage result = await SearchClient.GetAsync(
$"{NewsSearchEndPoint}/?q={WebUtility.UrlEncode(query)}&count={count}&offset={offset}&mkt={market}&freshness={freshness}");
result.EnsureSuccessStatusCode();
string json = await result.Content.ReadAsStringAsync();
dynamic data = JObject.Parse(json);
if (data.value == null || data.value.Count <= 0)
{
return(articles);
}
for (int i = 0; i < data.value.Count; i++)
{
var news = new BingNewsEntity
{
Title = data.value[i].name,
Url = data.value[i].url,
Description = data.value[i].description,
ThumbnailUrl = data.value[i].image?.thumbnail?.contentUrl,
Provider = data.value[i].provider?[0].name,
DatePublished = data.value[i].datePublished,
Category = data.value[i].category
};
if (!string.IsNullOrEmpty(news.ThumbnailUrl))
{
articles.Add(news);
}
}
articles = articles.Where(m => m.Category != null && m.Category.Equals("ScienceAndTechnology"))
.ToList();
}
catch (Exception e)
{
Console.WriteLine(e.Source + e.Message);
}
return(articles);
}
public static async Task <List <BingNewsEntity> > GetTopNews(string category = "ScienceAndTechnology")
{
var articles = new List <BingNewsEntity>();
try
{
HttpResponseMessage result = await SearchClient.GetAsync(
$"{TopNewsSearchEndPoint}/?category={category}");
result.EnsureSuccessStatusCode();
string json = await result.Content.ReadAsStringAsync();
dynamic data = JObject.Parse(json);
if (data.value == null || data.value.Count <= 0)
{
return(articles);
}
for (int i = 0; i < data.value.Count; i++)
{
var news = new BingNewsEntity
{
Title = data.value[i].name,
Url = data.value[i].url,
Description = data.value[i].description,
ThumbnailUrl = data.value[i].image?.thumbnail?.contentUrl,
Provider = data.value[i].provider?[0].name,
DatePublished = data.value[i].datePublished,
Category = data.value[i].category
};
if (!string.IsNullOrEmpty(news.ThumbnailUrl))
{
articles.Add(news);
}
}
}
catch (Exception e)
{
Console.WriteLine(e.Source + e.Message);
}
return(articles);
}
