Open the shapfile and raster file.

Open the shapfile. The Code is as follows:

1 // open the workspace and the corresponding workspace factory is required
2 IWorkspaceFactory PWorkSpaceFactory = new ShapefileWorkspaceFactory ();
3
4 IFeatureWorkspace PFeatureWorkSpace;
5 IFeatureLayer PFeatureLayer = new FeatureLayerClass ();
6 OpenFileDialog Open = new OpenFileDialog ();
7
8 Open. Title = "Select File ";
9 Open. Filter = "shapefiel (. shp) | *. shp ";
10
11 Open. ShowDialog ();
12
13 string strFullPath = Open. FileName;
14 if (strFullPath = "") return;
15
16 // extract the file name and open path
17 int index = strFullPath. LastIndexOf ("\\");
18 string filepath = strFullPath. Substring (0, index );
19 string filename = strFullPath. Substring (index + 1 );
20
21 // set the shapefile workspace, that is, the open path
22 PFeatureWorkSpace = (IFeatureWorkspace) PWorkSpaceFactory. OpenFromFile (filepath, 0 );
23
24 // open a class Element
25 PFeatureLayer. FeatureClass = PFeatureWorkSpace. OpenFeatureClass (filename );
26 // PFeatureLayer. Name = PFeatureLayer. FeatureClass. AliasName;
27
28 // first clear the existing Layer
29 axMapControl1.Map. ClearLayers ();
30
31 // Add a Layer
32 axMapControl1.Map. AddLayer (PFeatureLayer );
33 axMapControl1.Refresh ();

Open Raster file 1 IWorkspaceFactory PWorkSpaceFactory = new RasterWorkspaceFactory ();
2 IRasterWorkspace PRasterWorkSpace;
3 IRasterDataset PRasterDataset = new RasterDatasetClass ();
4 IRasterLayer PRasterlayer = new RasterLayerClass ();
5 OpenFileDialog Open = new OpenFileDialog ();
6
7 Open. Title = "Select File ";
8 Open. Filter = "Layer File (*. lyr) | *. jpg; *. bmp; *. tiff ";
9
10 Open. ShowDialog ();
11 string strFullPath = Open. FileName;
12 if (strFullPath = "") return;
13
14 // extract the grid dataset name and open path
15 int index = strFullPath. LastIndexOf ("\\");
16 string filepath = strFullPath. Substring (0, index );
17 string filename = strFullPath. Substring (index + 1 );
18
19 PRasterWorkSpace = (IRasterWorkspace) PWorkSpaceFactory. OpenFromFile (filepath, 0 );
20 PRasterDataset = (IRasterDataset) PRasterWorkSpace. OpenRasterDataset (filename );
21
22 // initialize a new Rasterlayer in three ways: CreateFromDataset, CreateFromFilePath, and CreateFromRaster
23
24 // CreateFromDataset
25 PRasterlayer. CreateFromDataset (PRasterDataset );
26
27 // CreateFromFilePath
28 // PRasterlayer. CreateFromFilePath (strFullPath );
29
30 axMapControl1.Map. ClearLayers ();
31 axMapControl1.AddLayer (PRasterlayer );
32 axMapControl1.Refresh ();

Other types of files, such as Coverage, Geodatabase, CAD, and so on. The principle is similar. paste it on another day.