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How to change field visibility and alias

Suleyman-Arslan

I am trying to iterate layers and change visibility of fields in feature layers. I tryed to get "CIMFieldDescription" but it returns null when layer has default field descriptions.

Am I going in wrong way?

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Accepted answers

UmaHarano

The best way to change the visibility of a field to use the IDisplayTable.

This code will set all the fields in a layer to be visible:

 <SPAN class="keyword token">var</SPAN> table  <SPAN class="operator token">=</SPAN> MapView<SPAN class="punctuation token">.</SPAN>Active<SPAN class="punctuation token">.</SPAN>Map<SPAN class="punctuation token">.</SPAN><SPAN class="token function">GetLayersAsFlattenedList</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>OfType<SPAN class="operator token"><</SPAN>FeatureLayer<SPAN class="operator token">></SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">FirstOrDefault</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> IDisplayTable<SPAN class="punctuation token">;</SPAN>
            QueuedTask<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Run</SPAN><SPAN class="punctuation token">(</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">=</SPAN><SPAN class="operator token">></SPAN> <SPAN class="punctuation token">{</SPAN>
                <SPAN class="keyword token">var</SPAN> fieldDescriptions <SPAN class="operator token">=</SPAN> table<SPAN class="punctuation token">.</SPAN><SPAN class="token function">GetFieldDescriptions</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
                <SPAN class="keyword token">foreach</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">var</SPAN> field <SPAN class="keyword token">in</SPAN> fieldDescriptions<SPAN class="punctuation token">)</SPAN>
                <SPAN class="punctuation token">{</SPAN>
                    field<SPAN class="punctuation token">.</SPAN>IsVisible <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">;</SPAN>
                <SPAN class="punctuation token">}</SPAN>

                table<SPAN class="punctuation token">.</SPAN><SPAN class="token function">SetFieldDescriptions</SPAN><SPAN class="punctuation token">(</SPAN>fieldDescriptions<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
            <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Thanks

Uma

All comments

Suleyman-Arslan

Thank you for your help.

Your code help me to find out my mistake. My code worked by adding code "fl.SetFieldDescriptions(fieldDesc);"

            Map pmap = await FindOpenExistingMapAsync(tb_Map.Text);
            List<BasicFeatureLayer> featureLayerList = pmap.GetLayersAsFlattenedList().OfType<BasicFeatureLayer>().ToList();
            foreach (BasicFeatureLayer fl in featureLayerList)
            {
                await QueuedTask.Run(() =>
                {
                    var fieldDesc = fl.GetFieldDescriptions();
                    foreach (var fd in fieldDesc)
                    {                 
                        fd.IsVisible = myconfig.Visible;
                        fd.Alias = myconfig.Alias;  
                    }
                    fl.SetFieldDescriptions(fieldDesc);
                });
                
            }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

UmaHarano

The best way to change the visibility of a field to use the IDisplayTable.

This code will set all the fields in a layer to be visible:

 <SPAN class="keyword token">var</SPAN> table  <SPAN class="operator token">=</SPAN> MapView<SPAN class="punctuation token">.</SPAN>Active<SPAN class="punctuation token">.</SPAN>Map<SPAN class="punctuation token">.</SPAN><SPAN class="token function">GetLayersAsFlattenedList</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>OfType<SPAN class="operator token"><</SPAN>FeatureLayer<SPAN class="operator token">></SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">FirstOrDefault</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> IDisplayTable<SPAN class="punctuation token">;</SPAN>
            QueuedTask<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Run</SPAN><SPAN class="punctuation token">(</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">=</SPAN><SPAN class="operator token">></SPAN> <SPAN class="punctuation token">{</SPAN>
                <SPAN class="keyword token">var</SPAN> fieldDescriptions <SPAN class="operator token">=</SPAN> table<SPAN class="punctuation token">.</SPAN><SPAN class="token function">GetFieldDescriptions</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
                <SPAN class="keyword token">foreach</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">var</SPAN> field <SPAN class="keyword token">in</SPAN> fieldDescriptions<SPAN class="punctuation token">)</SPAN>
                <SPAN class="punctuation token">{</SPAN>
                    field<SPAN class="punctuation token">.</SPAN>IsVisible <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">;</SPAN>
                <SPAN class="punctuation token">}</SPAN>

                table<SPAN class="punctuation token">.</SPAN><SPAN class="token function">SetFieldDescriptions</SPAN><SPAN class="punctuation token">(</SPAN>fieldDescriptions<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
            <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Thanks

Uma

Suleyman-Arslan

I used following code to change visibility but nothing changed on layers.

Map pmap = await FindOpenExistingMapAsync(tb_Map.Text);

List<BasicFeatureLayer> featureLayerList = pmap.GetLayersAsFlattenedList().OfType<BasicFeatureLayer>().ToList();
listView1.ItemsSource = pmap.GetLayersAsFlattenedList().OfType<BasicFeatureLayer>().ToList();

foreach (BasicFeatureLayer fl in featureLayerList)
{
   await QueuedTask.Run(() =>
   {
      foreach (FieldDescription fd in fl.GetFieldDescriptions())
      {
            fd.IsVisible = true;
         fd.Alias = myconfig.Alias;
      }

});

}

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