/// <summary>
/// 递归解析生成 Tree
/// </summary>
/// <param name="parentNode"></param>
/// <param name="data"></param>
static void ResolveAntArea(AntAreaModel parentNode, List <AreaModel> data)
{
foreach (var areaModel in data.Where(a => a.ParentCode == parentNode.Value))
{
var item = new AntAreaModel()
{
Label = areaModel.Name, Value = areaModel.Code
};
ResolveAntArea(item, data);
parentNode.Children.Add(item);
}
}
static async Task Main(string[] args)
{
var client = new HttpClient();
var html = await client.GetStringAsync("http://www.mca.gov.cn/article/sj/xzqh/2020/2020/2020112010001.html");
var doc = new HtmlDocument();
doc.LoadHtml(html);
var title = doc.DocumentNode.SelectSingleNode("//tr[1]").InnerText.Trim().Replace("\n", "").Replace("\r", "");
Console.WriteLine($"正在抓取 {title} ...");
var nodes = doc.DocumentNode.SelectNodes("//tr[@height='19']");
var result = new List <AreaModel>();
//解析数据 xpath
foreach (var node in nodes)
{
var code = node.SelectSingleNode("td[2]").InnerText.Trim();
var name = node.SelectSingleNode("td[3]").InnerText.Replace(((char)160).ToString(), " ");
if (name[0] != ' ')
{
result.Add(new AreaModel()
{
Code = code, Name = name.TrimStart(), ParentCode = "100000"
});
}
else
{
var step = 10;
AreaModel parent = null;
var codeInt = int.Parse(code);
while (step < 10000 & parent == null)
{
step *= 10;
var parentCode = codeInt / step * step;
parent = result.FirstOrDefault(a => a.Code == parentCode.ToString());
}
if (parent == null)
{
throw new Exception($"未能找到父节点 {code}");
}
result.Add(new AreaModel()
{
Code = code, Name = name.TrimStart(), ParentCode = parent.Code
});
}
}
//写入数据
await File.WriteAllTextAsync("region_three.json", JsonConvert.SerializeObject(result, Formatting.Indented));
//生成 ant design 级联选择格式 https://ant.design/components/cascader-cn/s
var rootAntNode = new AntAreaModel()
{
Value = "100000"
};
ResolveAntArea(rootAntNode, result);
await File.WriteAllTextAsync("region_antd.json", JsonConvert.SerializeObject(rootAntNode.Children, new JsonSerializerSettings()
{
Formatting = Formatting.Indented,
ContractResolver = new CamelCasePropertyNamesContractResolver()
}));
Console.WriteLine("完成");
}
