/// <summary>
/// 打开mdb数据库
/// </summary>
/// <param name="mdbFile"></param>
/// <returns></returns>
private static ESRI.ArcGIS.Geodatabase.IFeatureWorkspace GetAeWorkspace(string mdbFile)
{
ESRI.ArcGIS.Geodatabase.IFeatureWorkspace featureWorkspace;
ESRI.ArcGIS.Geodatabase.IWorkspaceFactory workspaceFactory = new ESRI.ArcGIS.DataSourcesGDB.AccessWorkspaceFactoryClass();
featureWorkspace = workspaceFactory.OpenFromFile(mdbFile, 0) as ESRI.ArcGIS.Geodatabase.IFeatureWorkspace;
System.Runtime.InteropServices.Marshal.ReleaseComObject(workspaceFactory);
return(featureWorkspace);
}
public static IPolygon GetPolyGonFromFile(string path)
{
IPolygon pGon = null;
if (path.EndsWith(".mdb"))
{
string errmsg = "";
IWorkspaceFactory pwf = new ESRI.ArcGIS.DataSourcesGDB.AccessWorkspaceFactoryClass();
IWorkspace pworkspace = pwf.OpenFromFile(path, 0);
IEnumDataset pEnumdataset = pworkspace.get_Datasets(esriDatasetType.esriDTFeatureClass);
pEnumdataset.Reset();
IDataset pDataset = pEnumdataset.Next();
while (pDataset != null)
{
IFeatureClass pFeatureclass = pDataset as IFeatureClass;
if (pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolygon && pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolyline)
{
pDataset = pEnumdataset.Next();
continue;
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolygon)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
pGon = pFeature.Shape as IPolygon;
break;
}
else
{
pDataset = pEnumdataset.Next();
continue;
}
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolyline)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
IPolyline pPolyline = pFeature.Shape as IPolyline;
pGon = GetPolygonFormLine(pPolyline);
if (pGon.IsClosed == false)
{
errmsg = "选择的要素不能构成封闭多边形！";
pGon = null;
pDataset = pEnumdataset.Next();
continue;
}
else
{
break;
}
}
}
}
if (pGon == null)
{
IEnumDataset pEnumdataset1 = pworkspace.get_Datasets(esriDatasetType.esriDTFeatureDataset);
pEnumdataset1.Reset();
pDataset = pEnumdataset1.Next();
while (pDataset != null)
{
IFeatureDataset pFeatureDataset = pDataset as IFeatureDataset;
IEnumDataset pEnumDataset2 = pFeatureDataset.Subsets;
pEnumDataset2.Reset();
IDataset pDataset1 = pEnumDataset2.Next();
while (pDataset1 != null)
{
if (pDataset1 is IFeatureClass)
{
IFeatureClass pFeatureclass = pDataset1 as IFeatureClass;
if (pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolygon && pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolyline)
{
pDataset1 = pEnumDataset2.Next();
continue;
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolygon)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
pGon = pFeature.Shape as IPolygon;
break;
}
else
{
pDataset1 = pEnumDataset2.Next();
continue;
}
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolyline)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
IPolyline pPolyline = pFeature.Shape as IPolyline;
pGon = GetPolygonFormLine(pPolyline);
if (pGon.IsClosed == false)
{
errmsg = "选择的要素不能构成封闭多边形！";
pGon = null;
pDataset1 = pEnumDataset2.Next();
continue;
}
else
{
break;
}
}
}
}
}
if (pGon != null)
{
break;
}
pDataset = pEnumdataset1.Next();
}
}
if (pGon == null)
{
if (errmsg != "")
{
System.Windows.Forms.MessageBox.Show(errmsg, "提示", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Information);
}
else
{
System.Windows.Forms.MessageBox.Show("请选择一个包含面要素和线要素的文件", "提示", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Information);
}
return(pGon);
}
}
else if (path.EndsWith(".shp"))
{
IWorkspaceFactory pwf = new ESRI.ArcGIS.DataSourcesFile.ShapefileWorkspaceFactoryClass();
string filepath = System.IO.Path.GetDirectoryName(path);
string filename = path.Substring(path.LastIndexOf("\\") + 1);
IFeatureWorkspace pFeatureworkspace = (IFeatureWorkspace)pwf.OpenFromFile(filepath, 0);
IFeatureClass pFeatureclass = pFeatureworkspace.OpenFeatureClass(filename);
if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolygon)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
pGon = pFeature.Shape as IPolygon;
}
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolyline)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
IPolyline pPolyline = pFeature.Shape as IPolyline;
pGon = GetPolygonFormLine(pPolyline);
if (pGon.IsClosed == false)
{
System.Windows.Forms.MessageBox.Show("选择的线要素不能构成封闭多边形！", "提示", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Exclamation);
return(null);
}
}
}
else
{
System.Windows.Forms.MessageBox.Show("请选择一个面或者线要素文件！", "提示", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Information);
return(null);
}
}
else if (path.EndsWith(".txt"))
{
string txtpath = path;
System.IO.StreamReader smRead = new System.IO.StreamReader(txtpath, System.Text.Encoding.Default); //设置路径
string line;
IPointCollection pc = pGon as IPointCollection;
double x, y;
while ((line = smRead.ReadLine()) != null)
{
if (line.IndexOf(",") > 0)
{
try
{
x = double.Parse(line.Substring(0, line.IndexOf(",")));
y = double.Parse(line.Substring(line.IndexOf(",") + 1));
}
catch
{
System.Windows.Forms.MessageBox.Show("文本文件格式不正确！", "提示", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Exclamation);
smRead.Close();
return(null);
}
IPoint tmpPoint = new ESRI.ArcGIS.Geometry.Point();
tmpPoint.X = x;
tmpPoint.Y = y;
object ep = System.Reflection.Missing.Value;
pc.AddPoint(tmpPoint, ref ep, ref ep);
}
}
smRead.Close();
ICurve pCurve = pGon as ICurve;
if (pCurve.IsClosed == false)
{
System.Windows.Forms.MessageBox.Show("导入点坐标不能构成封闭多边形！", "提示", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Exclamation);
return(null);
}
}
else if (path.EndsWith("gdb"))
{
string errmsg = "";
IWorkspaceFactory pwf = new ESRI.ArcGIS.DataSourcesGDB.FileGDBWorkspaceFactoryClass();
IWorkspace pworkspace = pwf.OpenFromFile(path.Substring(0, path.LastIndexOf("\\")), 0);
IEnumDataset pEnumdataset = pworkspace.get_Datasets(esriDatasetType.esriDTFeatureClass);
pEnumdataset.Reset();
IDataset pDataset = pEnumdataset.Next();
while (pDataset != null)
{
IFeatureClass pFeatureclass = pDataset as IFeatureClass;
if (pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolygon && pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolyline)
{
pDataset = pEnumdataset.Next();
continue;
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolygon)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
pGon = pFeature.Shape as IPolygon;
break;
}
else
{
pDataset = pEnumdataset.Next();
continue;
}
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolyline)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
IPolyline pPolyline = pFeature.Shape as IPolyline;
pGon = GetPolygonFormLine(pPolyline);
if (pGon.IsClosed == false)
{
errmsg = "选择的要素不能构成封闭多边形！";
pGon = null;
pDataset = pEnumdataset.Next();
continue;
}
else
{
break;
}
}
}
}
if (pGon == null)
{
IEnumDataset pEnumdataset1 = pworkspace.get_Datasets(esriDatasetType.esriDTFeatureDataset);
pEnumdataset1.Reset();
pDataset = pEnumdataset1.Next();
while (pDataset != null)
{
IFeatureDataset pFeatureDataset = pDataset as IFeatureDataset;
IEnumDataset pEnumDataset2 = pFeatureDataset.Subsets;
pEnumDataset2.Reset();
IDataset pDataset1 = pEnumDataset2.Next();
while (pDataset1 != null)
{
if (pDataset1 is IFeatureClass)
{
IFeatureClass pFeatureclass = pDataset1 as IFeatureClass;
if (pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolygon && pFeatureclass.ShapeType != esriGeometryType.esriGeometryPolyline)
{
pDataset1 = pEnumDataset2.Next();
continue;
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolygon)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
pGon = pFeature.Shape as IPolygon;
break;
}
else
{
pDataset1 = pEnumDataset2.Next();
continue;
}
}
else if (pFeatureclass.ShapeType == esriGeometryType.esriGeometryPolyline)
{
IFeatureCursor pCursor = pFeatureclass.Search(null, false);
IFeature pFeature = pCursor.NextFeature();
if (pFeature != null)
{
IPolyline pPolyline = pFeature.Shape as IPolyline;
pGon = GetPolygonFormLine(pPolyline);
if (pGon.IsClosed == false)
{
errmsg = "选择的要素不能构成封闭多边形！";
pGon = null;
pDataset1 = pEnumDataset2.Next();
continue;
}
else
{
break;
}
}
}
}
}
if (pGon != null)
{
break;
}
pDataset = pEnumdataset1.Next();
}
}
if (pGon == null)
{
if (errmsg != "")
{
System.Windows.Forms.MessageBox.Show(errmsg, "提示", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Information);
}
else
{
System.Windows.Forms.MessageBox.Show("请选择一个包含面要素和线要素的文件", "提示", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Information);
}
return(pGon);
}
}
return(pGon);
}
