ArcGIS Pro二次开发-添加字段

Posted 2021-03-06 gisoracle

using System;
using System.Collections.Generic;
using System.Linq;
//using System.Windows;
//using System.Windows.Forms;


using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

using ArcGIS.Desktop.Core.Geoprocessing;

using ArcGIS.Desktop.Framework;

using ArcGIS.Desktop.Framework.Contracts;

using ArcGIS.Desktop.Framework.Dialogs;

using ArcGIS.Desktop.Mapping;

namespace ProAppModule1
{
    internal class Button1 : ArcGIS.Desktop.Framework.Contracts.Button
    {
        string AddFieldName = "gisoracle";
        protected override async void OnClick()

        {

            try

            {

                BasicFeatureLayer layer = null;

                await ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>

                {

                    //find selected layer

                    if (MapView.Active.GetSelectedLayers().Count == 0)

                    {

                        MessageBox.Show("Select a feature class from the Content ‘Table of Content‘ first.");

                        return;

                    }

                    layer = MapView.Active.GetSelectedLayers()[0] as BasicFeatureLayer;



                });

                if (layer == null)

                    MessageBox.Show("Unable to find a feature class at the first layer of the active map");

                else

                {

                    var dataSource = await GetDataSource(layer);

                    MessageBox.Show($@"{dataSource} was found ... adding a new Field");

                    await

                        ExecuteAddFieldTool(layer, new KeyValuePair<string, string>(AddFieldName, AddFieldName), "Text", 50);

                }

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.ToString());

            }

        }

        private async Task<string> GetDataSource(BasicFeatureLayer theLayer)

        {

            try

            {

                return await ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>

                {

                    var inTable = theLayer.Name;

                    var table = theLayer.GetTable();

                    var dataStore = table.GetDatastore();

                    var workspaceNameDef = dataStore.GetConnectionString();

                    var workspaceName = workspaceNameDef.Split(‘=‘)[1];



                    var fullSpec = System.IO.Path.Combine(workspaceName, inTable);

                    return fullSpec;

                });

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.ToString());

                return string.Empty;

            }

        }



        private async Task<bool> ExecuteAddFieldTool(BasicFeatureLayer theLayer, KeyValuePair<string, string> field, string fieldType, int? fieldLength = null, bool isNullable = true)

        {

            try

            {

                return await ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>

                {

                    var inTable = theLayer.Name;

                    var table = theLayer.GetTable();

                    var dataStore = table.GetDatastore();

                    var workspaceNameDef = dataStore.GetConnectionString();

                    var workspaceName = workspaceNameDef.Split(‘=‘)[1];



                    var fullSpec = System.IO.Path.Combine(workspaceName, inTable);

                    System.Diagnostics.Debug.WriteLine($@"Add {field.Key} from {fullSpec}");



                    var parameters = Geoprocessing.MakeValueArray(fullSpec, field.Key, fieldType.ToUpper(), null, null,

                        fieldLength, field.Value, isNullable ? "NULABLE" : "NON_NULLABLE");

                    var cts = new CancellationTokenSource();

                    var results = Geoprocessing.ExecuteToolAsync("management.AddField", parameters, null, cts.Token,

                        (eventName, o) =>

                        {

                            System.Diagnostics.Debug.WriteLine($@"GP event: {eventName}");

                        });

                    return true;

                });

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.ToString());

                return false;

            }

        }



    }

}