C#读取shp文件并获取图形保存到sde要素类中（不使用ESRI的类库，纯c#实现）

说明：首先要将sde要素类发布成对应的要素服务，通过对要素服务的操作，实现数据在sde要素类中的增删

//向服务器发出请求 public string getPostData(string postString, string url) { string result = ""; try { byte[] postData = Encoding.UTF8.GetBytes(postString); WebClient webClient = new WebClient(); string method = "POST"; //POST Header webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded"); //webClient.Headers.Add("Cache-Control", "no-cache"); //同步提交请求，并返回数据 byte[] responseData = webClient.UploadData(url, method, postData);//得到返回字符流  result = Encoding.UTF8.GetString(responseData);//解码  } catch { return result; } return result; }


#region 用c#直接读取shapfile的过程类 class Point//点类  { public double X; public double Y; } class Polyline//线类  { public double[] Box = new double[4]; public int NumParts; public int NumPoints; public ArrayList Parts; //在部分中第一个点的索引 public ArrayList Points; //所有部分的点  } class Polygon : Polyline//面类  { } #endregion 用c#直接读取shapfile的过程类

//从服务器上读取shp文件流  public Stream GetShpStream(string url) { var client = new WebClient(); client.Encoding = Encoding.UTF8; Uri uri = new Uri(url); byte[] bytes = client.DownloadData(uri); Stream pstream = new MemoryStream(bytes); return pstream; }

 
//将读取的shp流拼成符合sde要素类的图形
public static string GetGeometryFromShp(Stream stream, string czah) { //int wkid = 2362;//西安80 StringBuilder sb = new StringBuilder("[{"); sb.Append(@"""attributes""" + ":{\"CZAH\":\"" + czah + "\"},");//添加属性信息 sb.Append(@"""geometry""" + ":{"); ArrayList polygons = new ArrayList();//面集合 ArrayList polylines = new ArrayList();//线集合 ArrayList points = new ArrayList();//点集合 int ShapeType;//shp文件类型 double xmin, ymin, xmax, ymax; //FileStream fs = new FileStream(filepath, FileMode.Open, FileAccess.Read);//File.Open(filepath, FileMode.Open) using (BinaryReader br = new BinaryReader(stream)) { br.ReadBytes(24); int FileLength = br.ReadInt32();//<0代表数据长度未知 int FileBanben = br.ReadInt32(); ShapeType = br.ReadInt32(); xmin = br.ReadDouble(); ymin = br.ReadDouble(); xmax = br.ReadDouble(); ymax = br.ReadDouble(); br.ReadBytes(32); if (IsXian80(xmin, ymin, xmax, ymax)) { if (ShapeType == 5) { polygons.Clear(); while (br.PeekChar() != -1) { Polygon polygon = new Polygon(); polygon.Parts = new ArrayList(); polygon.Points = new ArrayList(); uint RecordNum = br.ReadUInt32(); int DataLength = br.ReadInt32(); //读取第i个记录 int m = br.ReadInt32(); for (int i = 0; i < 4; i++) { polygon.Box[i] = br.ReadDouble(); } polygon.NumParts = br.ReadInt32(); polygon.NumPoints = br.ReadInt32(); for (int j = 0; j < polygon.NumParts; j++) { int parts = new int(); parts = br.ReadInt32(); polygon.Parts.Add(parts); } for (int j = 0; j < polygon.NumPoints; j++) { Point pointtemp = new Point(); pointtemp.X = br.ReadDouble(); pointtemp.Y = br.ReadDouble(); polygon.Points.Add(pointtemp); } polygons.Add(polygon); } foreach (Polygon p in polygons) { sb.Append(@"""rings"":["); for (int i = 0; i < p.NumParts; i++) { int startpoint; int endpoint; if (i == p.NumParts - 1) { startpoint = (int)p.Parts[i]; endpoint = p.NumPoints; } else { startpoint = (int)p.Parts[i]; endpoint = (int)p.Parts[i + 1]; } sb.Append("["); for (int k = 0, j = startpoint; j < endpoint; j++, k++) { Point ps = (Point)p.Points[j]; sb.Append("[" + ps.X + "," + ps.Y + "],"); } sb.Remove(sb.Length - 1, 1); sb.Append("],"); } sb.Remove(sb.Length - 1, 1); sb.Append("]"); } } } else { return "noxian"; } br.Close(); br.Dispose(); } sb.Append("}"); sb.Append("}]"); return sb.ToString(); }

//添加要素到sde要素类中（url为发布的要素服务地址） public bool addFeatureToFeatureClass(string feature, string url) { bool isSuccess = false; url += "/addFeatures"; string postString = "features=" + feature + ""; postString += "&" + "f=json"; string result = getPostData(postString, url); var result1 = JsonConvert.DeserializeObject<dynamic>(result); var presult = result1.addResults[0].success as IEnumerable<dynamic>; string strresult = presult.ToString(); if (string.Equals(strresult, "True")) { isSuccess = true; } return isSuccess; }