arcgis Engine创建shp图层
原文：http://blog.sina.com.cn/s/blog_90b91bf10100ydvg.html
以创建点图层为例。
首先要得到保存文件的地址。
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "Shape文件（*.shp）|*.shp";
saveFileDialog.Title = "新建点形shp文件";
saveFileDialog.CheckFileExists = false;
DialogResult dialogResult = saveFileDialog.ShowDialog();
IWorkspaceFactory pWorkspaceFactory = new ShapefileWorkspaceFactor y();
int index;
string fileName;
string filePath;
if (dialogResult == DialogResult.OK)
{
fileFullPath = saveFileDialog.FileName;
index = fileFullPath.LastIndexOf("\");
fileName = fileFullPath.Substring(index + 1);
filePath = fileFullPath.Substring(0, index);
if (System.IO.File.Exists(saveFileDialog.FileName))//检查文件是否存在
{
if (MessageBox.Show("该文件夹下已经有同名文件，替换原文件？", "询问", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK)
{
IFeatureWorkspace FWS = pWorkspaceFactory.OpenFromFile(filePath, 0) as IFeatureWorkspace;
IFeatureClass pFeatureClass = FWS.OpenFeatureClass(fileName);
IDataset pDataset = pFeatureClass as IDataset;
pDataset.Delete();
}
//System.IO.File.Delete(saveFileDialog.FileName);
else
return;
}
}
else
{
fileFullPath = null;
return;
}
然后，要为该SHP建立新的字段：
IFields pFields = new FieldsClass();
IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;
IField pField = new FieldClass();
IFieldEdit pFieldEdit = pField as IFieldEdit;
pFieldEdit.Name_2 = "Shape";
pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
IGeometryDef pGeometryDef = new GeometryDef();
IGeometryDefEdit pGeometryDefEdit = pGeometryDef as IGeometryDefEdit;
pGeometryDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPoint;//点、线、面什么的
pGeometryDefEdit.SpatialReference_2 = axMapControl1.SpatialReference;
ISpatialReferenceFactory 2 ipSpaRefFa = new SpatialReferenceEnvironm entClass();
IGeographicCoordinateSys tem ipGeoCorSys = new GeographicCoordinateSyst emClass();
ipGeoCorSys = ipSpaRefFa.CreateGeographicCoordina teSystem((int)esriSRGeoCSType.esriSRGeoCS_WGS1984);
ISpatialReference ipSpaRef = ipGeoCorSys;
//IControlPrecision2 contrPrecision = ipSpaRef as IControlPrecision2;
pGeometryDefEdit.SpatialReference_2 = ipSpaRef;
pFieldEdit.GeometryDef_2 = pGeometryDef;
pFieldsEdit.AddField(pField);
pField = new FieldClass();//新建字段
pFieldEdit = pField as IFieldEdit;
pFieldEdit.Length_2 = 100;
pFieldEdit.Name_2 = "editorName";
pFieldEdit.AliasName_2 = "editorName";
pFieldEdit.Type_2 = esriFieldType.esriFieldTypeString;
pFieldsEdit.AddField(pField);
//继续增加其它字段
最后创建图层
IFeatureWorkspace pFeatureWorkspace = pWorkspaceFactory.OpenFromFile(filePath, 0) as IFeatureWorkspace;
int i = fileName.IndexOf(".shp");
if(i == -1 )
pFeatureWorkspace.CreateFeatureClass(fileName + ".shp", pFields, null, null, esriFeatureType.esriFTSimple, "Shape", "");
else
pFeatureWorkspace.CreateFeatureClass(fileName, pFields, null, null, esriFeatureType.esriFTSimple, "Shape", "");
axMapControl1.AddShapeFile(filePath, fileName + ".shp");