topic How to Create Field in Table, Standalone Table, Feature Layer, or Feature Class? in ArcGIS Pro SDK Questions

How to Create Field in Table, Standalone Table, Feature Layer, or Feature Class?

JamesKennedy1 — Wed, 12 Jun 2019 16:42:59 GMT

Hi,

I am working on porting old applications from ArcObjects to the new ArcGIS Pro SDK and have a significant question. I've looked through the questions and the examples, but I am stumped on this one.

How can I create a field in a Table?

in a Standalone Table?

in a Feature Layer?

in a Feature Class?

In ArcObjects this was quite easy as you could do

IField field = new Field();
IFieldEdit fieldEdit = (IFieldEdit)field;
fieldEdit.Name_2 = fieldName;
fieldEdit.Type_2 = fieldType;
featureClass.AddField(field);

now I must use ExecuteToolAsync?

How can I use this, is there a good example of someone adding a field?

Thanks,

James

Re: How to Create Field in Table, Standalone Table, Feature Layer, or Feature Class?

Anonymous User — Sun, 12 Dec 2021 11:03:13 GMT

James,

Schema edits in Pro are done with GP tools via the GP.ExecuteToolAsync method as you suspected.

Here's an example of a few calls, with an add field at the end.

namespace testGPExecute
{
  internal class GPExecute : Button
  {
    protected override async void OnClick()
    {
      //create feature class from template
      var mva = Geoprocessing.MakeValueArray(@"C:\arcgis\ArcTutor\Editing\Zion.gdb", "test", "POINT",@"C:\arcgis\ArcTutor\Editing\Zion.gdb\Ranger_stations");
      var cts = new System.Threading.CancellationTokenSource();
      var result = await Geoprocessing.ExecuteToolAsync("CreateFeatureclass_management", mva, null, cts.Token,null,GPExecuteToolFlags.RefreshProjectItems);
      
      //copy selected features from a layer in the map to feature class
      mva = Geoprocessing.MakeValueArray("Ranger stations", @"C:\arcgis\ArcTutor\Editing\Zion.gdb\test");
      result = await Geoprocessing.ExecuteToolAsync("CopyFeatures_management", mva,null,cts.Token,null,GPExecuteToolFlags.None);

      //add field to test feature class
      mva = Geoprocessing.MakeValueArray(@"C:\arcgis\ArcTutor\Editing\Zion.gdb\test", "someID", "LONG");
      result = await Geoprocessing.ExecuteToolAsync("AddField_management", mva, null, cts.Token, null, GPExecuteToolFlags.None);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Note that if the layers are all in your map you can specify the layer name instead of the data path. e.g. "Ranger stations" is a layer in my map so I can use the layer name.

Re: How to Create Field in Table, Standalone Table, Feature Layer, or Feature Class?

JamesKennedy1 — Wed, 12 Jun 2019 18:44:18 GMT

Thanks Sean,

I'll give this a shot