这几天同事要求我在原来的项目的基础上添加一个生成shp文件的小功能，大体内容就是他给我提供文件夹路径名和图斑各个点的坐标（只是一个环），根据这些参数来生成一个shp文件。这个功能在刚来公司的时候实现过一次，但是后面一直没用就给忘记了（所以写的代码一定不要删呀，以后肯定用的着）。
下面我贴一下建立shp文件的代码，欢迎大家指点。
1: private void CreateShpFile()
2: {
3: IWorkspaceFactory pWF = new ShapefileWorkspaceFactoryClass();
4: //这个例子将shp所在文件夹定死了，在项目中会根据参数来设置。
5: //当所选的文件夹不存在的时候程序会报错。
6: IFeatureWorkspace pFWs = pWF.OpenFromFile(@"E:1", 0) as IFeatureWorkspace;
7:
8: IFeatureClassDescription fcDescription = new FeatureClassDescriptionClass();
9: IObjectClassDescription ocDescription = fcDescription as IObjectClassDescription;
10:
11:
12:
13: IFields pFields = new ESRI.ArcGIS.Geodatabase.Fields();
14: IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;
15: IField pField = new ESRI.ArcGIS.Geodatabase.Field();
16: IFieldEdit pFieldEdit = pField as IFieldEdit;
17:
18: //================这个部分是最重要的========================
19: //这段代码确定了这个shp文件的集合类型（polygon、polyline、point）
20: //这个字段的名称一定要设置，如果没有设置程序会出错。
21: //但是这个shp文件几何字段的名称并不是设置的这个。
22: IGeometryDef pGeometryDef = new GeometryDefClass();
23: IGeometryDefEdit pGeometryDefEdit = pGeometryDef as IGeometryDefEdit;
24: pGeometryDefEdit.GeometryType_2 = ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon;
25: pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
26: pFieldEdit.GeometryDef_2 = pGeometryDef;
27: pFieldEdit.Name_2 = "shape";
28: pFieldsEdit.AddField(pField);
29: //============================================================
30:
31: //==============添加OID字段=========================
32: pField = new ESRI.ArcGIS.Geodatabase.Field();
33: pFieldEdit = pField as IFieldEdit;
34: pFieldEdit.Name_2 = "OID";
35: pFieldEdit.Type_2 = esriFieldType.esriFieldTypeOID;
36: pFieldsEdit.AddField(pField);
37:
38: //==============添加WaHa字段，没有实际意义，只是为了测试========
39: pField = new ESRI.ArcGIS.Geodatabase.Field();
40: pFieldEdit = pField as IFieldEdit;
41: pFieldEdit.Type_2 = esriFieldType.esriFieldTypeString;
42: pFieldEdit.Name_2 = "WaHa";
43: pFieldEdit.Length_2 = 100;
44: pFieldsEdit.AddField(pField);
45:
46: //=============创建shp文件===================
47: IFeatureClass pFC = pFWs.CreateFeatureClass("123.shp", pFields, null, null, esriFeatureType.esriFTSimple, "Shape", "");
48:
49: //=============在shp文件中创建新记录=========
50: IFeature pFeature = pFC.CreateFeature();
51:
52:
53: //=========根据别人给的参数（这里是自己定死的）建立一个polygon字段值
54: object missing = Type.Missing;
55: IPointCollection pPc = new ESRI.ArcGIS.Geometry.Polygon();
56: IPoint point = new ESRI.ArcGIS.Geometry.Point();
57: point.X = 0;
58: point.Y = 0;
59: pPc.AddPoint(point, ref missing, ref missing);
60:
61: point = new ESRI.ArcGIS.Geometry.Point();
62: point.X = 10;
63: point.Y = 0;
64: pPc.AddPoint(point, ref missing, ref missing);
65:
66: point = new ESRI.ArcGIS.Geometry.Point();
67: point.X = 10;
68: point.Y = 10;
69: pPc.AddPoint(point, ref missing, ref missing);
70:
71: point = new ESRI.ArcGIS.Geometry.Point();
72: point.X = 0;
73: point.Y = 10;
74: pPc.AddPoint(point, ref missing, ref missing);
75:
76: point = new ESRI.ArcGIS.Geometry.Point();
77: point.X = 0;
78: point.Y = 0;
79: pPc.AddPoint(point, ref missing, ref missing);
80:
81: pFeature.Shape = pPc as IGeometry;
82: //对创建的这一行记录中的WaHa字段进行复制（值为abc）
83: pFeature.set_Value(pFeature.Fields.FindField("WaHa"), "abc");
84: //保存该记录
85: pFeature.Store();
86: }