进行数据的访问（mxd、shapefile、gdb、mdb、栅格图像）
/// <summary>
/// 打开地图文档
/// </summary>
public string OpenMXD()
{
string MxdPath = “”;
OpenFileDialog OpenMXD = new OpenFileDialog();
OpenMXD.Title = “打开地图文档”;
OpenMXD.Filter = “Map Documents (*.mxd)|*.mxd”;
if (OpenMXD.ShowDialog() == DialogResult.OK)
{
MxdPath = OpenMXD.FileName;
Maplayer.LoadMxFile(MxdPath);
}
return MxdPath;
}
private void openmxd_Click(object sender, EventArgs e)
{
OpenMXD();
}
/// <summary>
/// 添加数据shpfile
/// </summary>
private void AddShapeFile()
{
IWorkspaceFactory pWorkspaceFactory;
IFeatureWorkspace pFeatureWorkspace;
IFeatureLayer pFeatureLayer;
//获取当前路径和文件名
OpenFileDialog AddShapeFile = new OpenFileDialog();
AddShapeFile.Title = “打开Shape文件”;
AddShapeFile.Filter = “Shape文件(*.shp)|*.shp”;
AddShapeFile.ShowDialog();
string strFullPath = AddShapeFile.FileName;
if (strFullPath == “”) return;
int Index = strFullPath.LastIndexOf(“\”);
string filePath = strFullPath.Substring(0, Index);
string fileName = strFullPath.Substring(Index + 1);
//打开工作空间并添加shp文件
pWorkspaceFactory = new ShapefileWorkspaceFactory();
pFeatureWorkspace = (IFeatureWorkspace)pWorkspaceFactory.OpenFromFile(filePath, 0);
pFeatureLayer = new FeatureLayer();
pFeatureLayer.FeatureClass = pFeatureWorkspace.OpenFeatureClass(fileName);
pFeatureLayer.Name = pFeatureLayer.FeatureClass.AliasName;
Maplayer.Map.AddLayer(pFeatureLayer);
AddShapeFile.Dispose();
}
private void openshp_Click(object sender, EventArgs e)
{
AddShapeFile();
}
private void menuAddShp_Click(object sender, EventArgs e)
{
//前两行代码用来定义一个工作空间，可以简单理解为将文件输入输出定位到该文件夹下
IWorkspaceFactory pWorkspaceFactory = new ShapefileWorkspaceFactoryClass();
IWorkspace pWorkspace = pWorkspaceFactory.OpenFromFile(@”D:\GIS-Data”, 0);
//定义特征工作空间（其实和工作空间的差别只是AE类的组织的原因，你甚至可以理解成它们是一样的），将工作空间类型强制转化到特征工作空间
IFeatureWorkspace pFeatureWorkspace = pWorkspace as IFeatureWorkspace;
//打开特征集，其实特征集仍然只是AE对象组织的一种定义，可以简单理解为就是shape文件中空间和属性数据的转化形式
IFeatureClass pFC = pFeatureWorkspace.OpenFeatureClass(“continent.shp”);
IFeatureLayer pFLayer = new FeatureLayerClass();//定义特征图层，就是GIS里面图层的概念
pFLayer.FeatureClass = pFC; //设置图层的特征集为刚才的特征集,这样就可以将特征集中的数据加载到特征图层对象中
pFLayer.Name = pFC.AliasName; //设置图层名
ILayer pLayer = pFLayer as ILayer; //定义图层，并将刚才的特征图层强制转化为图层变量
//下面两行代码是在地图控件中加载图层
IMap pMap = axMapControl1.Map;
pMap.AddLayer(pLayer);
axMapControl1.ActiveView.Refresh(); //刷新视图，显示加载图层后的结果
}
///// <summary>
///// 添加数据gdb
///// </summary>
private void Addgdb()
{
IFeatureWorkspace pFeatureWorkspace;
IFeatureLayer pFeatureLayer;
IFeatureDataset pFeatureDataset;
//获取当前路径和文件名
FolderBrowserDialog addgdb = new FolderBrowserDialog();
addgdb.SelectedPath = “”;
addgdb.ShowDialog();
//打开personGeodatabase,并添加图层
IWorkspaceFactory pFileGDBWorkspaceFactory = new FileGDBWorkspaceFactory();
//打开工作空间并遍历数据集
IWorkspace pWorkspace = pFileGDBWorkspaceFactory.OpenFromFile(addgdb.SelectedPath, 0);
IFeatureWorkspace pFeatWorkspace = pWorkspace as IFeatureWorkspace;
IEnumDataset pEnumDataset = pWorkspace.get_Datasets(ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTAny);
pEnumDataset.Reset();
IDataset pDataset = pEnumDataset.Next();
//如果数据集是IFeatureDataset,则遍历它下面的子类
if (pDataset is IFeatureDataset)
{
pFeatureWorkspace = (IFeatureWorkspace)pFileGDBWorkspaceFactory.OpenFromFile(addgdb.SelectedPath, 0);
pFeatureDataset = pFeatureWorkspace.OpenFeatureDataset(pDataset.Name);
IEnumDataset pEnumDataset1 = pFeatureDataset.Subsets;
pEnumDataset1.Reset();
IDataset pDataset1 = pEnumDataset1.Next();
//如果子类是FeatureClass，则添加到Maplayer中
if (pDataset1 is IFeatureClass)
{
pFeatureLayer = new FeatureLayerClass();
pFeatureLayer.FeatureClass = pFeatureWorkspace.OpenFeatureClass(pDataset1.Name);
pFeatureLayer.Name = pFeatureLayer.FeatureClass.AliasName;
Maplayer.Map.AddLayer(pFeatureLayer);
}
else
{
}
}
addgdb.Dispose();
}
private void addgdb_Click(object sender, EventArgs e)
{
Addgdb();
}
///// <summary>
///// 添加栅格数据
///// </summary>
private void Addgrid()
{
IWorkspaceFactory pWorkspaceFactory;
IRasterWorkspace pRasterWorkspace;
OpenFileDialog addgrid = new OpenFileDialog();
addgrid.Filter = “栅格数据(*.lyr)|*.jpg;*.bmp;*.tiff”;
addgrid.Title = “打开栅格数据”;
addgrid.ShowDialog();
//获取当前路径和文件名
string strFullPath = addgrid.FileName;
if (strFullPath == “”) return;
int Index = strFullPath.LastIndexOf(“\”);
string fileName = strFullPath.Substring(Index + 1);
string filePath = strFullPath.Substring(0, Index);
pWorkspaceFactory = new RasterWorkspaceFactoryClass();
pRasterWorkspace = (IRasterWorkspace)pWorkspaceFactory.OpenFromFile(filePath, 0);
IRasterDataset pRasterDataset = (IRasterDataset)pRasterWorkspace.OpenRasterDataset(fileName);
IRasterLayer pRasterLayer = new RasterLayerClass();
pRasterLayer.CreateFromDataset(pRasterDataset);
Maplayer.Map.AddLayer(pRasterLayer);
addgrid.Dispose();
}
private void sgrid_Click(object sender, EventArgs e)
{
Addgrid();
}
///// <summary>
///// 添加数据mdb
///// </summary>
private void addmdb_Click(object sender, EventArgs e)
{
try
{
OpenFileDialog Openmdb = new OpenFileDialog();
Openmdb.Filter = “数据库(MDB)|*.mdb”;
DialogResult DialogR = Openmdb.ShowDialog();
if (DialogR == DialogResult.OK)
{
// textBox1.Text = OpenFile.FileName;
TreeNode fristNode = treeView1.Nodes.Add(Openmdb.FileName);
IWorkspaceFactory pWsFt = new AccessWorkspaceFactoryClass();
IWorkspace pWs = pWsFt.OpenFromFile(Openmdb.FileName, 0);
IFeatureWorkspace pFWS = pWs as IFeatureWorkspace;
IEnumDataset pEDataset = pWs.get_Datasets(esriDatasetType.esriDTAny);
IDataset pDataset = pEDataset.Next();
while (pDataset != null)
{
LoadFeatureClass(pDataset, fristNode);
pDataset = pEDataset.Next();
}
fristNode.Expand();
}
Openmdb.Dispose();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void LoadFeatureClass(IDataset pSubDataset, TreeNode CurrentNode)
{
if (pSubDataset.Type == esriDatasetType.esriDTFeatureDataset)
{
IFeatureDataset pFDataSet = (IFeatureDataset)pSubDataset;
TreeNode SubNode = CurrentNode.Nodes.Add(pSubDataset.Name);
IEnumDataset pEDataset = pFDataSet.Subsets;
IDataset pDataset = pEDataset.Next();
while (pDataset != null)
{
LoadFeatureClass(pDataset, SubNode);
pDataset = pEDataset.Next();
}
}
else
{
CurrentNode.Nodes.Add(pSubDataset.Name);
}
}
转载自：https://blog.csdn.net/niusi1288/article/details/53456077
