How can I pass the "gdbFullName" string value from the public class "salida" to the string "fcName"?

Question

I am trying to set a default output name for a shp. file. For this I am to pass the gdbFullValue variable from inside the public class salida to the String fcName so that the output includes the activation code in the final name.

I believe it has to do with getters and setters. But I have been trying around for some time and I am not able to understand what I am missing.

   class Salida
{
    ShapefileManage _shpManageOutput;
    IFeatureClass _outpuFc;
    public String _gdbName;
    public String gdbFullName;
    public Salida(ShapefileManage shpManageOutput, ISpatialReference spatialReference, String gdbName)
    {
        this._shpManageOutput = shpManageOutput;
        this.crearCapaSalida(spatialReference, esriGeometryType.esriGeometryPoint);
        this._gdbName = gdbName;
        string gdbFullName = gdbName.Substring(gdbName.LastIndexOf("/") + 1);
    }

    private string fcName = string.Format("PositionalAccuracySamplePoints" + "_" + "{0}", gdbFullName.Substring(0, 14));
    public string returnOutputName()
    { return fcName; }

What I am getting is a NullReferenceValue or simply a gdbFullName string that is empty and therefore the final output name only includes de static part of the fcName string.

Thanks in advance

in which line you are getting the exception? are you sure you are passing gdbName to the constructor? — Vivek Nuna, Nov 07 '19 at 09:04

score 0 · Answer 1 · answered Nov 07 '19 at 10:05

0

You are trying to extract the activation code from gdbFullName before it is set. Note that fcName is a private field which is initiated before your constructor is run.

Why don't you put the creation of the filename into your returnOutputName method?

answered Nov 07 '19 at 10:05

fvetsch

181
1
11

If you have additional questions, you should put them in the comments of the OP. – Markus Deibel Nov 07 '19 at 10:17

score 0 · Answer 2 · answered Nov 07 '19 at 12:03

Thanks for your advice. The truth is that I don't think I have shown what I had to show in the post:

The public class salida is being instanciated in another class. Therefore all I had to do was to set the fcName to be calculated when instanciating the class, and not outside. I leave here the code that Works.

class Salida
{
    string _gdbName;
    ShapefileManage _shpManageOutput;
    IFeatureClass _outpuFc;
    //ISpatialReference spatialReference;


    public Salida(ShapefileManage shpManageOutput, ISpatialReference spatialReference, string gdbName)
    {
        this._gdbName = gdbName;
        this._shpManageOutput = shpManageOutput;
        crearCapaSalida(spatialReference, esriGeometryType.esriGeometryPoint);
    }

And in the other class, where the main process can be found is where I instanciate the salida class, with the actual fcName;

// Instanciamos los objetos gdbManage and shpManage
            gdbManageInput = new GeodatabaseManage(_inputGdbPath);
            shpManageOutput = new ShapefileManage(_outputPath);

            // Instanciamos la clase salida, pasandole el spatialReference del dataset.
            IFeatureDataset fd = gdbManageInput.getFeatureDataset(_featureDataset);
            ISpatialReference spatialReference = (fd as IGeoDataset).SpatialReference;
            string gdbName = _inputGdbPath.Substring(_inputGdbPath.LastIndexOf('\\') + 1);
            string last14gdbName = gdbName.Substring(0, 14);
            string nombreSalida = "PositionalAccuracyPoints_" + last14gdbName;
            salida = new Salida(shpManageOutput, spatialReference, nombreSalida);

Anyhow, thanks a lot for the help, if it where not for the comments I wouldn't have been able to orientate myself.

How can I pass the "gdbFullName" string value from the public class "salida" to the string "fcName"?

2 Answers2