Spatial Reference for Feature Dataset

[TauhidulIslam]

Hello Everyone,
I am new in  development with C#.
Can anyone please give me any suggestion how can I create spatial reference using spatial Reference Dialogbox using C# code?

Thanks in Advance.

Tauhid

[KenBuja]

This is the code I use for an Add-in which uses a button to set the spatial reference, checking if the user selected a projected or geographic projections.

private ESRI.ArcGIS.Geometry.ISpatialReference3 pSR;

private void cmdSetReference_Click(System.Object sender, System.EventArgs e) {
     ESRI.ArcGIS.CatalogUI.ISpatialReferenceDialog2 pSRDialog = new ESRI.ArcGIS.CatalogUI.SpatialReferenceDialog();
    pSR = pSRDialog.DoModalCreate(false, false, false, My.ArcMap.Application.hWnd);
    if ((pSR != null)) {
         if (!pSR is ESRI.ArcGIS.Geometry.IGeographicCoordinateSystem2 & !pSR is ESRI.ArcGIS.Geometry.IProjectedCoordinateSystem5) {
             System.Windows.Forms.MessageBox.Show("Please select a projected or geographic coordinate system.   ", "Unknown Coordinate System", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Exclamation);
         }
     }
 }

[TauhidulIslam]

Dear KenBuja,
Thanks for your reply but it won't help me. I am stuc kwith my code. my code is give below:

private void cmdSub_Click(object sender, EventArgs e)
        {
            string strdatabasePath = "C:\\" + @txtProject.Text + "\\Survey\\Data_Table\\" + @txtDatabase.Text + @txtSub.Text;

            if (!Directory.Exists(strdatabasePath) == false)
            {
                MessageBox.Show("Destination Directory was not Found, Please Create the Directory First");
            }

            IWorkspaceFactory pWSF = new FileGDBWorkspaceFactoryClass();

            Boolean blsWorkspace = pWSF.IsWorkspace("C:\\" + @txtProject.Text + "\\Survey\\GeoDatabase\\" + @txtDatabase.Text + "\\" + @txtDatabase.Text + ".gdb");
            if (blsWorkspace == true)
            {
                IWorkspace pWorkspace = pWSF.OpenFromFile("C:\\" + @txtProject.Text + "\\Survey\\GeoDatabase\\" + @txtDatabase.Text + "\\" + @txtDatabase.Text + ".gdb", 0);
                IFeatureWorkspace pfeatureWorkspace = (IFeatureWorkspace)pWorkspace;
                IEnumDatasetName pEnumDatasetName = pWorkspace.get_DatasetNames(esriDatasetType.esriDTFeatureDataset);
                IDatasetName pDatasetName = pEnumDatasetName.Next();
                while (pDatasetName != null)
                {
                    pEnumDatasetName = (IEnumDatasetName)pDatasetName;


                    string theDatasetName;
                    int theValue;
                    Boolean f = groupBox2.Focused;
                    int theVal = Convert.ToInt32(f);

                    while (pDatasetName == null)
                    {
                        theDatasetName = pDatasetName.Name;
                        if (theDatasetName == txtSub.Text)
                        {
                            theValue = 1;

                            pDatasetName = pEnumDatasetName.Next();

                            if (theValue != 1)
                            {
                                ISpatialReferenceDialog pSpaRefDlog = new SpatialReferenceDialogClass();
                                ISpatialReference m_SpaRef = pSpaRefDlog.DoModalCreate(true, true, true, theVal);
                              
                            }
                            MessageBox.Show("FeatureDataset Created");
                            
                        }
                        else
                        {
                            MessageBox.Show("No Spatial Reference Found, Feature Dataset was Not Created");
                        }
                    }
                }
            }
        }

there is no error shown but the button is not working when i click the button. please help me to solve the problem. can you please give me any suggestion what should I do.

Thank in Advance
Tauhid

[KenBuja]

The first thing to do is put some error handling code in your subroutine to see where it is failing.

[sapnas]

The logic hightlighted in red will alter spatial reference of feature dataset.

if (theValue != 1)
{
 ISpatialReferenceDialog pSpaRefDlog = new SpatialReferenceDialogClass();
 ISpatialReference m_SpaRef = pSpaRefDlog.DoModalCreate(true, true, true, theVal);
IName nameObj = pDatasetName as IName;
 IDataset dataset = nameObj.Open() as IDataset;
 IGeoDataset pGeoDataset = dataset as IGeoDataset;
 IGeoDatasetSchemaEdit pGDsEdit = pGeoDataset as IGeoDatasetSchemaEdit;
 pGDsEdit.AlterSpatialReference( m_SpaRef);
                             
}

[TauhidulIslam]

hello sshetty,
this won't work either. can you give me any other suggestion please?

Thanks,
Tauhid
GIS Specialist
NRECA International Ltd

[sapnas · Accepted solution]

Also, There is a flaw in your logic. You are explicitly setting theValue to 1 and hence your if(theValue != 1) is always false in other words the button click will not launch spatial reference dialog.

[TauhidulIslam]

sshety,
thanks for your help. can you please give me any suggestion that how can I use this if statement for open the spatial reference dialog box?

Again thanks for pointing out the problem.

[sapnas]

If you want to test it then comment out the if statement and that should launch the spatial reference dialog box. Regarding the usability of If statement , you will have to analyse the code and modify it according to your requirement.