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How do I zoom the map frame in layout view to a layer in the TOC using ArcGIS Pro SDK (C#)?

JoshuaO_Neil

Hello,

I can not figure out how to zoom the map frame in layout view to a specific layer using ArcGIS Pro SDK (C#)?

Thank you!

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UmaHarano

Hi Joshua

Here is a code snippet you can use to zoom the map frame in layout view to a specific layer:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; LayoutProjectItem layoutItem <SPAN class="operator token">=</SPAN> Project<SPAN class="punctuation token">.</SPAN>Current<SPAN class="punctuation token">.</SPAN>GetItems<SPAN class="operator token"><</SPAN>LayoutProjectItem<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>item <SPAN class="operator token">=</SPAN><SPAN class="operator token">></SPAN> item<SPAN class="punctuation token">.</SPAN>Name<SPAN class="punctuation token">.</SPAN><SPAN class="token function">Equals</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"MyLayout"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 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>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token">//Get the layout from the layout project item</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Layout layout <SPAN class="operator token">=</SPAN> layoutItem<SPAN class="punctuation token">.</SPAN><SPAN class="token function">GetLayout</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token">//Get the map frame in the layout</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MapFrame mapFrame <SPAN class="operator token">=</SPAN> layout<SPAN class="punctuation token">.</SPAN><SPAN class="token function">FindElement</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"New Map Frame"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> MapFrame<SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token">//Get map </SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">var</SPAN> mapFrameMap <SPAN class="operator token">=</SPAN> mapFrame<SPAN class="punctuation token">.</SPAN>Map<SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token">//Get the specific layer you want from the map</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">var</SPAN> lyrOfInterest <SPAN class="operator token">=</SPAN> mapFrameMap<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="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token">//Get the Layer's extent</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">var</SPAN> lyrExtent <SPAN class="operator token">=</SPAN> lyrOfInterest<SPAN class="punctuation token">.</SPAN><SPAN class="token function">QueryExtent</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token">//Zoom to this extent in the MapFrame</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token">//Note: This method will be deprecated at 2.3. </SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token">//But you can use mapFrame.SetCamera(lyrOfInterest) instead. (This will be a new overload available in 2.3)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; mapFrame<SPAN class="punctuation token">.</SPAN><SPAN class="token function">ZoomTo</SPAN><SPAN class="punctuation token">(</SPAN>lyrExtent<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <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>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Thanks

Uma

JoshuaO_Neil

Thank you this worked great! But is there a way to 1) zoom to only a selected feature in a layer rather than the whole layer, and then 2) zoom out a certain percentage more? For example, zoom to California in the states layer. And then zoom out a bit more so that it is not zoomed all the way in to California?

Thank you

JeffreyBarrette

Hi Joshua,

The way I got this to work was to create a query and iterate using a cursor. You want to make sure your query returns one feature.

////Zoom to the envelope of each feature
//Reference the layout
Layout layout = LayoutView.Active.Layout;

//Select the feature
await QueuedTask.Run(() =>
{
//Reference the mapframe, associated map, and build a query
MapFrame mf = layout.FindElement("Map Frame") as MapFrame;
Map m = mf.Map;
FeatureLayer fl = m.FindLayers("GreatLakes").First() as FeatureLayer;
QueryFilter qf = new QueryFilter();
string whereClause = "NAME = 'Lake Erie'";
qf.WhereClause = whereClause;

//Zoom to the feature
using (ArcGIS.Core.Data.RowCursor rowCursor = fl.Search(qf))
{
while (rowCursor.MoveNext())
{
// get the shape from the row
ArcGIS.Core.Data.Feature feature = rowCursor.Current as ArcGIS.Core.Data.Feature;
Polygon polygon = feature.GetShape() as Polygon;
Envelope env = polygon.Extent as Envelope;
mf.ZoomTo(env);
}
}
});

I hope this helps,

Jeff

JoshuaO_Neil

Thank you! I am trying to zoom out a certain percentage further, so for example, zoom to Lake Erie, but then zoom out 10% further. Is that possible? Also, I am trying to do a select by location (select state that intersects with a polygon project boundary, and then zoom to that state (but out a bit further such as 10%).

Thank you

ParhatM

Just FYI. I was able to modify a little to make it work for my case where I need to zoom to a feature from certain feature layer in Map view. Hope it helps anyone.

await QueuedTask.Run(() =>
{
//Reference the mapframe, associated map, and build a query
FeatureLayer fl = MapView.Active.Map.FindLayers("FeatureLayerName").First() as FeatureLayer;

QueryFilter qf = new QueryFilter();
string whereClause = "MyField = 'FieldValue'";
qf.WhereClause = whereClause;

}
}
});

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