Convert polyline to polygon Using ArcObjects

Question

I have a polyline and I want to convert it to a single polygon feature, I used this code but I get error while I can convert the same shapefile using feature to polygon on ArcGIS. Where is my mistake?

ESRI.ArcGIS.DataManagementTools.FeatureToPolygon ftp = new ESRI.ArcGIS.DataManagementTools.FeatureToPolygon(path + "lines.shp", path + "polygons.shp");
        ftp.attributes = "NO_ATTRIBUTES";
        GP.Execute(ftp, null);

The path is set to

string path= System.IO.Path.GetDirectoryName(Application.ExecutablePath) + @"\temp\Conversations\";

and the error that raises is:

Error HRESULT E_FAIL has been returned from a call to a COM component.

I tried to change output path to

"E:/MASTER/Project/Semirom/file gis semirom/New Folder/gisiran.gdb/tester"

But I get the same error... Do you think I must set Environment workspace or something like that? I also use:

ESRI.ArcGIS.ConversionTools.GPXtoFeatures and ESRI.ArcGIS.DataManagementTools.PointsToLine(path + "points.shp", path + "lines.shp"); with the same settings and they works fine..:(

Is there any better approach to create a polygon?

Answer 1

try this

using ESRI.ArcGIS.DataManagementTools;

FeatureToPolygon featureToPolygon = new FeatureToPolygon();

featureToPolygon.in_features = pInWorkspace.PathName + "\\" + pInFeatureClassName.FeatureDatasetName.Name + "\\Temp_Line_UnNamed";
featureToPolygon.out_feature_class = pInWorkspace.PathName + "\\" + pInFeatureClassName.FeatureDatasetName.Name + "\\Master_Poly_UnNamed";

featureToPolygon.attributes = "ATTRIBUTES";
featureToPolygon.cluster_tolerance = 0.01;
featureToPolygon.label_features = "";

RunTool(gp, featureToPolygon, null);

public static void RunTool(Geoprocessor geoprocessor, IGPProcess process, ITrackCancel tc)
    {
    // set overwrite option to true
    geoprocessor.OverwriteOutput = true;

    // execute tool
    try
    {
         geoprocessor.Execute(process, null);
         ReturnMessages(geoprocessor);
    }
    catch (Exception err)
    {
         Console.WriteLine(err.Message);
         ReturnMessages(geoprocessor);
    }
}

private static void ReturnMessages(Geoprocessor gp)
{
    if (gp.MessageCount > 0)
    {
        for (int i = 0; i <= gp.MessageCount - 1; i++)
        {
            Console.WriteLine(gp.GetMessage(i));
        }
    }
}

This??

static void Main()
{
    Application.EnableVisualStyles();
    Application.SetCompatibleTextRenderingDefault(false);
    ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.EngineOrDesktop);
    Application.Run(new frmHydroLinesToPolygons());
}

private void frmHydroLinesToPolygons_Load(object sender, EventArgs e)
{
    bool bLicenseAvailable;

    // initializes ArcObjects components runtime environment.
    // This class must be first Arcobject created 
    IAoInitialize aoInitialize = new AoInitializeClass();
    esriLicenseStatus status;

    // checks for ArcInfo License - essential when converting feature to polygons 
    status = aoInitialize.Initialize(esriLicenseProductCode.esriLicenseProductCodeAdvanced); //.esriLicenseProductCodeArcInfo); //.esriLicenseProductCodeArcView);

    // check if license is available
    if ((status == esriLicenseStatus.esriLicenseAvailable) || (status == esriLicenseStatus.esriLicenseAlreadyInitialized) || (status == esriLicenseStatus.esriLicenseCheckedOut))
    {
        bLicenseAvailable = true;
    }
    else
    {
        bLicenseAvailable = false;
    }

    // if not licensed - initialize license
    if (bLicenseAvailable != true)
    {
        if (status == esriLicenseStatus.esriLicenseNotLicensed)
        {
            MessageBox.Show("Sorry... An ArcInfo License is Required for this Program");
        }
        this.Close();
    }
}

Answer 2

You require to check out the licenses of the extensions required:

aoInitialize.CheckOutExtension(esriLicenseExtensionCode.esriLicenseExtensionCode3DAnalyst);
        aoInitialize.CheckOutExtension(esriLicenseExtensionCode.esriLicenseExtensionCodeSpatialAnalyst);

When using an ArcView or ArcEditor license, a program must explicitly use AoIntialize, and the product must be set to ArcView or ArcEditor, or the program fails. By default, the geoprocessor always assumes an ArcInfo license is required for execution of a script; therefore, if a program does not explicitly set the product required by the tools it executes, an ArcInfo license is initialized. See the following code example:

check this example:

using ESRI.ArcGIS.Geoprocessor;
using ESRI.ArcGIS.esriSystem;

static void Main(string[] args)
{

  //Initialize the application.
  esriLicenseStatus licenseStatus = esriLicenseStatus.esriLicenseUnavailable;
  IAoInitialize m_AoInitialize = new AoInitializeClass();
  licenseStatus = m_AoInitialize.Initialize
    (esriLicenseProductCode.esriLicenseProductCodeArcInfo);
  licenseStatus = m_AoInitialize.CheckOutExtension
    (esriLicenseExtensionCode.esriLicenseExtensionCodeSpatialAnalyst);

  // Initialize the geoprocessor.         
  Geoprocessor gp = new Geoprocessor();
  Slope tSlope = new Slope();
  tSlope.in_raster = @"E:\Data\demlatgrd";
  tSlope.out_raster = @� � �E:  \
    Data  \
    aspect03 ";gp.Execute(tSlope, null);

  licenseStatus = m_AoInitialize.CheckInExtension
    (esriLicenseExtensionCode.esriLicenseExtensionCodeSpatialAnalyst);
  m_AoInitialize.Shutdown();
  m_AoInitialize = null;

}