https://community.esri.com/t5/arcgis-pro-sdk-questions/adding-a-raster-layer-to-map/m-p/1175743#M8157 <P>In an addin i'm creating there's a button that will add a raster layer to my map based on a selected value in a listbox. The code is simple and works fine: the new layer appears in the TOC and the image appears on the map, but curiously all visibility checkboxes on layers in the TOC become greyed out for a while. After a minute or so, they become enabled again. I'm guessing something is going on in a background thread that is setting the visibility checkboxes to disabled while it is doing whatever it is doing. The question is what is it doing?&nbsp; The images are around 10mb each and georeferenced.</P><LI-CODE lang="csharp"> private async void cmd_ButtonAdd_Click(Object sender) { Layer pImgLay; string url = selectedObliqueVal; url = m_imgPath + m_Isle + m_imgFolder + "A" + url.Substring(1, 1) + @"\" + url + ".jpg"; if (!System.IO.File.Exists(url)) { MessageBox.Show("File does not exist:\r\n" + url); return; } pImgLay = await QueuedTask.Run(() =&gt; { return LayerFactory.Instance.CreateLayer(new Uri(url), MapView.Active.Map); }); _addedImages.Add(url); //MessageBox.Show("Add"); }</LI-CODE><P>&nbsp;</P> Thu, 19 May 2022 20:54:40 GMT BerndtNording 2022-05-19T20:54:40Z https://community.esri.com/t5/arcgis-pro-sdk-questions/adding-a-raster-layer-to-map/m-p/1175743#M8157 <P>In an addin i'm creating there's a button that will add a raster layer to my map based on a selected value in a listbox. The code is simple and works fine: the new layer appears in the TOC and the image appears on the map, but curiously all visibility checkboxes on layers in the TOC become greyed out for a while. After a minute or so, they become enabled again. I'm guessing something is going on in a background thread that is setting the visibility checkboxes to disabled while it is doing whatever it is doing. The question is what is it doing?&nbsp; The images are around 10mb each and georeferenced.</P><LI-CODE lang="csharp"> private async void cmd_ButtonAdd_Click(Object sender) { Layer pImgLay; string url = selectedObliqueVal; url = m_imgPath + m_Isle + m_imgFolder + "A" + url.Substring(1, 1) + @"\" + url + ".jpg"; if (!System.IO.File.Exists(url)) { MessageBox.Show("File does not exist:\r\n" + url); return; } pImgLay = await QueuedTask.Run(() =&gt; { return LayerFactory.Instance.CreateLayer(new Uri(url), MapView.Active.Map); }); _addedImages.Add(url); //MessageBox.Show("Add"); }</LI-CODE><P>&nbsp;</P> Thu, 19 May 2022 20:54:40 GMT https://community.esri.com/t5/arcgis-pro-sdk-questions/adding-a-raster-layer-to-map/m-p/1175743#M8157 BerndtNording 2022-05-19T20:54:40Z