How can i remove a point on a layer and in the datatable?

Hi guys, I have a point layer, where i can add point on this layer with id, values etc… These values are in the datatable too, how can i delete a point on the map with a simple button or by clicking on the point which delete the point values in the datatable and the point symbol on the map. I tried pointF.RemoveShapeAt(idOfThePoint) but it did’nt work. Thank for your help !

[jany-tenaj]

Check whether the feature you deleted has a FID that is not -1 if you remove the feature after reopening the project.

Please also check whether the Features have been initialized before you select the feature you want to remove.

If your layer is in IndexMode the feature gets created from the vertices and can’t be found inside DataSet.Features so it can’t be removed.

As far as I remember I run the following code on layers after reopening projects to make sure I can use them afterwards without errors.

if (!fLayer.DataSet.AttributesPopulated) fLayer.DataSet.FillAttributes();
fLayer.DataSet.IndexMode = false;

[jany-tenaj]

You might solve this in two ways.

1. Don’t add the point before the user has left the dialog.

                     if ((pointmouseClick))
                        {
                            frmValid f = new frmValid();
                            f.Show(); //if this is a form you might use ShowDialog to make sure the form is closed before you continue

                            if (Passerrelle.pass.ann) //add the point only if the user didn't click cancel
                            {
                                GeoAPI.Geometries.Coordinate coord = map1.PixelToProj(e.Location);
                                NetTopologySuite.Geometries.Point point = new NetTopologySuite.Geometries.Point(coord);

                                IFeature currentFeature = pointF.AddFeature(point);
                                pointID = pointID + 1; //don't use this to find the pointID, it could differ from the actual pointID of your currentFeature

                                currentFeature.DataRow["Référence"] = fichier + Passerrelle.pass.reff;
                                currentFeature.DataRow["Date"] = auj;
                                currentFeature.DataRow["hmoy"] = Passerrelle.pass.hmoy;

                            }
                            map1.Refresh();
                            map1.ResetBuffer();
                            map1.FunctionMode = FunctionMode.Pan;
                            map1.Cursor = Cursors.Default;
                            pointmouseClick = false; 
                        }

1. Call the code I posted in my first answer to clean the lists:

                     if ((pointmouseClick))
                        {
                            frmValid f = new frmValid();
                            f.Show();
                            
                            GeoAPI.Geometries.Coordinate coord = map1.PixelToProj(e.Location);
                            NetTopologySuite.Geometries.Point point = new NetTopologySuite.Geometries.Point(coord);

                            IFeature currentFeature = pointF.AddFeature(point);
                            pointID = pointID + 1;
                            
                            if (Passerrelle.pass.ann == false)
                            {
                                pointF.Features.Remove(currentFeature); // remove currentFeature directly, you can't be sure that your pointID belongs to currentFeature

                                pointF.UpdateExtent(); //update the extent of the existing features
                                pointF.InitializeVertices(); //updates the vertex array so it no longer contains the delete feature vertices
                                pointLayer.AssignFastDrawnStates(); //updates the FastDrawn states
                            }
                            else
                            {
                                currentFeature.DataRow["Référence"] = fichier + Passerrelle.pass.reff;
                                currentFeature.DataRow["Date"] = auj;
                                currentFeature.DataRow["hmoy"] = Passerrelle.pass.hmoy;

                            }
                            map1.Refresh();
                            map1.ResetBuffer();
                            map1.FunctionMode = FunctionMode.Pan;
                            map1.Cursor = Cursors.Default;
                            pointmouseClick = false; 
                        }