https://community.esri.com/t5/arcgis-pro-sdk-questions/creating-an-extent-indicator/m-p/1158072#M7975 <P>try something like this:</P><P>&nbsp;</P><LI-CODE lang="csharp"> var extent = new CIMExtentIndicator { SourceMapFrame = "Main Map Frame", Symbol = extentPoly.MakeSymbolReference(), }; cimAOI.ExtentIndicators = new List&lt;CIMExtentIndicator&gt; { extent}.ToArray();</LI-CODE> Fri, 25 Mar 2022 22:08:51 GMT CharlesMacleod 2022-03-25T22:08:51Z https://community.esri.com/t5/arcgis-pro-sdk-questions/creating-an-extent-indicator/m-p/1157211#M7964 <P>I'm creating a map layout in C#. I have 2 map frames; one is the main frame, the other is an area of interest frame that needs an extent indicator. I'm able to create everything on the layout, except I can't seem to figure out how to plug the CIMExtentIndicator definition into the CIMMapFrame Element.</P><P>Here's the relevant code:</P><P>&nbsp;</P><P>&nbsp;</P><LI-CODE lang="csharp">//MapFrame Creation Coordinate2D ll = new Coordinate2D(0.25, 1.3); Coordinate2D ur = new Coordinate2D(10.75, 8); Envelope mapEnv = EnvelopeBuilder.CreateEnvelope(ll, ur); //AOI map frame Coordinate2D ll_aoi = new Coordinate2D(10.05, .25); Coordinate2D ur_aoi = new Coordinate2D(10.72, 1.25); Envelope mapEnv_aoi = EnvelopeBuilder.CreateEnvelope(ll_aoi, ur_aoi); MapFrame newMapFrame = LayoutElementFactory.Instance.CreateMapFrame(newLayout, mapEnv, newMap); newMapFrame.SetName("Main Map Frame"); MapFrame AOI = LayoutElementFactory.Instance.CreateMapFrame(newLayout, mapEnv_aoi, aoiMap); var cimAOI = AOI.GetDefinition() as CIMMapFrame; AOI.SetName("AOI Frame"); CIMStroke extentOutline = SymbolFactory.Instance.ConstructStroke(ColorFactory.Instance.RedRGB, 1.0, SimpleLineStyle.Solid); CIMPolygonSymbol extentPoly = SymbolFactory.Instance.ConstructPolygonSymbol(ColorFactory.Instance.BlackRGB, SimpleFillStyle.Null, extentOutline); var extent = new CIMExtentIndicator { SourceMapFrame = "Main Map Frame", Symbol = extentPoly.MakeSymbolReference(), }; cimAOI.ExtentIndicators[0] = extent; AOI.SetDefinition(cimAOI); //exception thrown: the Object is null</LI-CODE><P>&nbsp;</P><P>&nbsp;</P><P>&nbsp;</P><P>I notice that the CIMExtentIndicator property on the CIMMapFrame element contains square brackets [], meaning it requires an index integer, but I'm just not sure how to form the correct syntax.</P><P>I'm using VS2019. No build issues occur before running the code. If I comment out the extent indicator code, everything works perfectly.</P> Thu, 24 Mar 2022 12:04:11 GMT https://community.esri.com/t5/arcgis-pro-sdk-questions/creating-an-extent-indicator/m-p/1157211#M7964 starenix 2022-03-24T12:04:11Z https://community.esri.com/t5/arcgis-pro-sdk-questions/creating-an-extent-indicator/m-p/1158072#M7975 <P>try something like this:</P><P>&nbsp;</P><LI-CODE lang="csharp"> var extent = new CIMExtentIndicator { SourceMapFrame = "Main Map Frame", Symbol = extentPoly.MakeSymbolReference(), }; cimAOI.ExtentIndicators = new List&lt;CIMExtentIndicator&gt; { extent}.ToArray();</LI-CODE> Fri, 25 Mar 2022 22:08:51 GMT https://community.esri.com/t5/arcgis-pro-sdk-questions/creating-an-extent-indicator/m-p/1158072#M7975 CharlesMacleod 2022-03-25T22:08:51Z https://community.esri.com/t5/arcgis-pro-sdk-questions/creating-an-extent-indicator/m-p/1158500#M7980 <P>Yes! That works perfectly, thank you so much Charles!</P> Mon, 28 Mar 2022 18:07:03 GMT https://community.esri.com/t5/arcgis-pro-sdk-questions/creating-an-extent-indicator/m-p/1158500#M7980 starenix 2022-03-28T18:07:03Z