public MapServerHelper(string url)
{
MapServerUrl = url;
string result = ZWebClient.DownloadString($"{MapServerUrl}?f=pjson");
JObject info = JObject.Parse(result);
JArray layers = info.GetValue("layers") as JArray;
LayerLst = layers.Select(obj => new MapServerLayer(MapServerUrl, (JObject)obj)).ToList();
}
/// <summary>
/// 获取features
/// </summary>
/// <returns></returns>
public JArray GetFeatures(string where, string outFields = "*")
{
string queryStr = $"query?where={where}&time=&returnCountOnly=false&returnIdsOnly=false&returnGeometry=true&outFields={outFields}&f=pjson";
string result = ZWebClient.DownloadString($"{url}/{id}/{queryStr}");
JObject obj = JObject.Parse(result);
JArray features = obj.Value <JArray>("features");
return(features);
}
/// <summary>
/// 获取Feature的总数
/// </summary>
/// <param name="where"></param>
/// <returns></returns>
public int GetFeautreNum(string where = "1=1")
{
string queryStr = $"query?where={where}&time=&returnCountOnly=true&returnIdsOnly=true&returnGeometry=false&outFields=*&f=pjson";
string result = ZWebClient.DownloadString($"{url}/{id}/{queryStr}");
JObject obj = JObject.Parse(result);
JToken token = null;
if (obj.TryGetValue("objectIds", out token))
{
return(((JArray)token).Count());
}
else if (obj.TryGetValue("count", out token))
{
return(Convert.ToInt32(token.ToString()));
}
else
{
return(0);
}
}
