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How to create a field with SDK .NET ?

Question asked by ld_Mobi on Oct 12, 2015
Latest reply on Oct 13, 2015 by ld_Mobi

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Hello,

I wish to create a new field (column) in the attribute table of a specific layer with the SDK .Net.

It is possible to create a new row (ligne) in the attribute table with createRow(RowBuffer rowbuffer) but a function to create a field don't seem to existe.

I found in the api reference that there was a field class and an attribute class that allow to get information about a field but nothing to actually create one. All the create function that I found allow to create a feature, or a row but not a field.

I also searched in the sample available on github (Esri/arcgis-pro-sdk-community-samples · GitHub ).

Maybe I missed something in the api reference.

Thank you for your help.

temge-esristaff

Oct 12, 2015 9:39 AM

Correct Answer

or as it was pointed out to me:

FeatureLayer firstLayer = MapView.Active.Map.Layers.OfType<FeatureLayer>().FirstOrDefault(); 
await QueuedTask.Run(() => 
{ 
   FeatureClass fc = firstLayer.GetTable() as FeatureClass; 
   Geoprocessing.ExecuteToolAsync("AddField_management", Geoprocessing.MakeValueArray(fc, "FieldName", "LONG", 9));
});

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ciava.at Oct 12, 2015 7:11 AM

I don't know but if it is missing you can use 'add field' of gp (https://github.com/Esri/arcgis-pro-sdk-community-samples/tree/master/Geoprocessing)

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ld_Mobi @ ciava.at on Oct 12, 2015 7:24 AM

When you say gp, are you talking about DriveTimeGP ?

Because there aren't any add field in this project.

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temge-esristaff

Oct 12, 2015 8:13 AM

You are not missing anything in the API. The API is designed following the data manipulation language (DML).

In order to add a field you would make a call using geoprocessing such as

using ArcGIS.Desktop.Core.Geoprocessing;
await QueuedTask.Run(() =>
    {
        Geoprocessing.ExecuteToolAsync("AddField_management", Geoprocessing.MakeValueArray("FieldName", "LONG", 9));
    });

1 person found this helpful

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ld_Mobi @ temge-esristaff on Oct 12, 2015 8:28 AM

Thank you but how do you tell this function which attribute table will add the new field ?

And this function use geoprocessing but is it possible to create a field in another way, like the creation of row with createRow() ?

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temge-esristaff

@ ld_Mobi on Oct 12, 2015 9:12 AM

My mistake,

the first argument is the target table.

using ArcGIS.Desktop.Core.Geoprocessing;  
await QueuedTask.Run(() =>  
    {  
        Geoprocessing.ExecuteToolAsync("AddField_management", Geoprocessing.MakeValueArray(@"c:\temp\demo.gdb\sample", "FieldName", "LONG", 9));  
    });

When you are working with layers in your map this would be that way to get the location:

FeatureLayer firstLayer = MapView.Active.Map.Layers.OfType<FeatureLayer>().FirstOrDefault();
await QueuedTask.Run(() =>
{ 
 FeatureClass fc = firstLayer.GetTable() as FeatureClass;
 Datastore ds = fc.GetDatastore();
 string dc = ds.GetConnectionString();
 if (ds is Geodatabase)
 {
  Geodatabase gdb = fc.GetDatastore() as Geodatabase;
  string gdbPath = gdb.GetPath();
 }
 string name = fc.GetName();
});

2 people found this helpful

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temge-esristaff

@ temge-esristaff on Oct 12, 2015 9:39 AM

or as it was pointed out to me:

FeatureLayer firstLayer = MapView.Active.Map.Layers.OfType<FeatureLayer>().FirstOrDefault(); 
await QueuedTask.Run(() => 
{ 
   FeatureClass fc = firstLayer.GetTable() as FeatureClass; 
   Geoprocessing.ExecuteToolAsync("AddField_management", Geoprocessing.MakeValueArray(fc, "FieldName", "LONG", 9));
});

2 people found this helpful

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ld_Mobi @ temge-esristaff on Oct 13, 2015 12:26 AM

Thank you very much for your help.

One last thing, where does the string "AddField_management" come from ?

I didn't find anything about it on the api reference or in the DAML.cs that you can generate in code.

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ciava.at @ ld_Mobi on Oct 13, 2015 1:05 AM

you can use toolboxalias.toolname or toolname_toolboxalias pattern.

The data management toolbox has alias 'management' while the name of tool is 'AddField' (click right button of mouse on tool and select property and see the name)

Here in

https://desktop.arcgis.com/en/desktop/latest/guide-books/extensions/task-assistant-manager/task-assistant-manager-faqs.htm you can see the list of alias of toolbox system

1 person found this helpful

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ld_Mobi @ ciava.at on Oct 13, 2015 1:07 AM

Thank you

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9 Replies

ciava.at Oct 12, 2015 7:11 AM
Mark Correct
Correct Answer
I don't know but if it is missing you can use 'add field' of gp (https://github.com/Esri/arcgis-pro-sdk-community-samples/tree/master/Geoprocessing)
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- ld_Mobi @ ciava.at on Oct 12, 2015 7:24 AM
  Mark Correct
  Correct Answer
  When you say gp, are you talking about DriveTimeGP ?
  Because there aren't any add field in this project.
  Like • Show 0 Likes0
  Actions
temge-esristaff Oct 12, 2015 8:13 AM
Mark Correct
Correct Answer
You are not missing anything in the API. The API is designed following the data manipulation language (DML).

In order to add a field you would make a call using geoprocessing such as
```
using ArcGIS.Desktop.Core.Geoprocessing;
await QueuedTask.Run(() =>
    {
        Geoprocessing.ExecuteToolAsync("AddField_management", Geoprocessing.MakeValueArray("FieldName", "LONG", 9));
    });
```
1 person found this helpful
Like • Show 0 Likes0
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- ld_Mobi @ temge-esristaff on Oct 12, 2015 8:28 AM
  Mark Correct
  Correct Answer
  Thank you but how do you tell this function which attribute table will add the new field ?
  And this function use geoprocessing but is it possible to create a field in another way, like the creation of row with createRow() ?
  Like • Show 0 Likes0
  Actions
  - temge-esristaff @ ld_Mobi on Oct 12, 2015 9:12 AM
    Mark Correct
    Correct Answer
    My mistake,
    
    the first argument is the target table.
    
    using ArcGIS.Desktop.Core.Geoprocessing; await QueuedTask.Run(() => { Geoprocessing.ExecuteToolAsync("AddField_management", Geoprocessing.MakeValueArray(@"c:\temp\demo.gdb\sample", "FieldName", "LONG", 9)); });
    
    When you are working with layers in your map this would be that way to get the location:
    
    FeatureLayer firstLayer = MapView.Active.Map.Layers.OfType<FeatureLayer>().FirstOrDefault(); await QueuedTask.Run(() => { FeatureClass fc = firstLayer.GetTable() as FeatureClass; Datastore ds = fc.GetDatastore(); string dc = ds.GetConnectionString(); if (ds is Geodatabase) { Geodatabase gdb = fc.GetDatastore() as Geodatabase; string gdbPath = gdb.GetPath(); } string name = fc.GetName(); });
    2 people found this helpful
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    - temge-esristaff @ temge-esristaff on Oct 12, 2015 9:39 AM
      Unmark Correct
      Correct Answer
      or as it was pointed out to me:
      
      FeatureLayer firstLayer = MapView.Active.Map.Layers.OfType<FeatureLayer>().FirstOrDefault(); await QueuedTask.Run(() => { FeatureClass fc = firstLayer.GetTable() as FeatureClass; Geoprocessing.ExecuteToolAsync("AddField_management", Geoprocessing.MakeValueArray(fc, "FieldName", "LONG", 9)); });
      2 people found this helpful
      Like • Show 0 Likes0
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      - ld_Mobi @ temge-esristaff on Oct 13, 2015 12:26 AM
        Mark Correct
        Correct Answer
        Thank you very much for your help.
        One last thing, where does the string "AddField_management" come from ?
        I didn't find anything about it on the api reference or in the DAML.cs that you can generate in code.
        Like • Show 0 Likes0
        Actions
        ciava.at @ ld_Mobi on Oct 13, 2015 1:05 AM
        Mark Correct
        Correct Answer
        you can use toolboxalias.toolname or toolname_toolboxalias pattern.
        The data management toolbox has alias 'management' while the name of tool is 'AddField' (click right button of mouse on tool and select property and see the name)
        Here in
        https://desktop.arcgis.com/en/desktop/latest/guide-books/extensions/task-assistant-manager/task-assistant-manager-faqs.htm you can see the list of alias of toolbox system
        1 person found this helpful
        Like • Show 0 Likes0
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        ld_Mobi @ ciava.at on Oct 13, 2015 1:07 AM
        Mark Correct
        Correct Answer
        Thank you
        Like • Show 0 Likes0
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