# Select Part of Map **URL:** \ **Category:** WPF\ **Created:** [August 2, 2010, 11:31am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761 "2010-08-02T11:31:10Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![Behnam](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/b/b4bc9f/32.png) [@Behnam](https://community.thinkgeo.com/u/Behnam)\ **Post date:** [August 2, 2010, 11:31am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/1 "2010-08-02T11:31:10Z")
Hi, I want to use mouse to select part of the map, and then highlight it. (similar to shift+Left click). So I want to:     1. Click on the map ( it can be combination of Left-Click  + Ctrl or Alt or ...)     2. Hold the Left-Click     3. Move the mouse over the map ( create something similar to the attached image).     4. Recieve the corners of the selected rectangle     5. Create a feature layer and Highlight the features But the problem is that when I hold the Left Buttom of the mouse . the control starts to pan the map. Many thanks   [Select.png](https://community.thinkgeo.com/uploads/default/original/1X/b182797719dc15d2439ff7b0ed1f75c6aee9b876.png) (54 KB) ---
**Author:** ![Raquibur](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/r/a9adbd/32.png) [@Raquibur](https://community.thinkgeo.com/u/Raquibur)\ **Post date:** [August 2, 2010, 12:12pm UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/2 "2010-08-02T12:12:32Z")
Dear Ben,      Please see the solution given by Howard in the thread   [gis.thinkgeo.com/Support/DiscussionForums/tabid/143/aff/39/aft/7827/afv/topic/Default.aspx](http://gis.thinkgeo.com/Support/DiscussionForums/tabid/143/aff/39/aft/7827/afv/topic/Default.aspx)      Thanks   Raquib  ---
**Author:** ![Howard](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/h/90ced4/32.png) [@Howard](https://community.thinkgeo.com/u/Howard)\ **Post date:** [August 2, 2010, 8:54pm UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/3 "2010-08-02T20:54:48Z")
Really thanks for your reply, Raquibur. To be more detail Ben, my suggestion is almost like Raquibur recommends. There is a little difference that is we need to keep the rectangle drawing with shift key and select features from one FeatureLayer. Here is a sample for you and let me know how it works. Thanks, Howard [Post7932.zip](https://community.thinkgeo.com/uploads/default/original/2X/f/fa210dd849bfa4b0509a918bf54f472d142a7970.zip) (9.2 KB) ---
**Author:** ![Behnam](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/b/b4bc9f/32.png) [@Behnam](https://community.thinkgeo.com/u/Behnam)\ **Post date:** [August 3, 2010, 2:29am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/4 "2010-08-03T02:29:37Z")
thanks,   I’ll give it a try and then write result here.      Many Thanks ---
**Author:** ![Howard](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/h/90ced4/32.png) [@Howard](https://community.thinkgeo.com/u/Howard)\ **Post date:** [August 3, 2010, 2:43am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/5 "2010-08-03T02:43:39Z")
Hi Ben,       Sure, take your time; just feel free to let me know if you have more queries.      Thanks,   Howard ---
**Author:** ![Behnam](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/b/b4bc9f/32.png) [@Behnam](https://community.thinkgeo.com/u/Behnam)\ **Post date:** [August 3, 2010, 9:51am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/6 "2010-08-03T09:51:47Z")
It's great, thanks Just to small Question:     1. can we use key other than shift for the selection Regards, Ben ---
**Author:** ![Howard](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/h/90ced4/32.png) [@Howard](https://community.thinkgeo.com/u/Howard)\ **Post date:** [August 4, 2010, 1:13am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/7 "2010-08-04T01:13:55Z")
Hi Ben, Yes, Just one line of code: for example, press "S" which means "Select" instead of shift key.  `selectExtentInteractiveOverlay.LeftClickDragKey = Keys.S;` One thing I want to point out is that you need reference System.Windows.Forms first because of the enum Keys. Thanks, Howard ---
**Author:** ![Behnam](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/b/b4bc9f/32.png) [@Behnam](https://community.thinkgeo.com/u/Behnam)\ **Post date:** [August 4, 2010, 4:23am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/8 "2010-08-04T04:23:03Z")
Thanks for your quick answer,   the thing I need is zooming and selecting at the same time, if it is possible:      shift+ mouse --\> zoom   ctrl+ mouse --\>select      thanks,   Ben ---
**Author:** ![Howard](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/h/90ced4/32.png) [@Howard](https://community.thinkgeo.com/u/Howard)\ **Post date:** [August 5, 2010, 12:44am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/9 "2010-08-05T00:44:40Z")
Ben, Sure, I changed the interactive overlay a little; please have a try, also you can change control key to any other key by setting the SelectDragKey property. Thanks, Howard [SelectExtentInteractiveOverlay.cs](https://community.thinkgeo.com/uploads/default/original/2X/9/9f3be6f4ad5e4b11e5fa1b79f55a836c184f55a7.cs) (3.1 KB) ---
**Author:** ![Behnam](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/b/b4bc9f/32.png) [@Behnam](https://community.thinkgeo.com/u/Behnam)\ **Post date:** [August 5, 2010, 4:06am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/10 "2010-08-05T04:06:17Z")
Thanks,      Unfortunately I can not download your code! ---
**Author:** ![Howard](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/h/90ced4/32.png) [@Howard](https://community.thinkgeo.com/u/Howard)\ **Post date:** [August 5, 2010, 4:21am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/11 "2010-08-05T04:21:06Z")
Hi Ben, Sorry for the inconvenience. I didn't notice that file suffix affects my uploading. Please download this one. Thanks, Howard [001\_SelectExtentInteractiveOverlay.txt](https://community.thinkgeo.com/uploads/default/original/2X/7/778f9264d748f121c46f589c734251a5297c8122.txt) (3.1 KB) ---
**Author:** ![David](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/d/aeb1de/32.png) [@David](https://community.thinkgeo.com/u/David)\ **Post date:** [August 5, 2010, 4:25am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/12 "2010-08-05T04:25:08Z")
 Guys,     I also posted it as code as well.  This is much nicer as people can see it before they download it.   `using System;using System.Collections.Generic;using System.Collections.ObjectModel;using System.Windows.Forms;using ThinkGeo.MapSuite.Core;using ThinkGeo.MapSuite.WpfDesktopEdition;namespace Post{    public class SelectExtentInteractiveOverlay : ExtentInteractiveOverlay    {        private Keys tempDragKey;        private bool isSelectDragKeyPressed;        public SelectExtentInteractiveOverlay(FeatureLayer sourceFeatureLayer)        {            SourceFeatureLayer = sourceFeatureLayer;            SelectDragKey = Keys.ControlKey;        }        public FeatureLayer SourceFeatureLayer { get; set; }        public Keys SelectDragKey { get; set; }         public event EventHandler Selected;        protected override InteractiveResult MouseDownCore(InteractionArguments interactionArguments)        {            if (UnsafeHelper.IsKeyPressed(SelectDragKey))            {                tempDragKey = LeftClickDragKey;                LeftClickDragKey = SelectDragKey;                isSelectDragKeyPressed = true;            }            InteractiveResult result = base.MouseDownCore(interactionArguments);            return result;        }        protected override InteractiveResult MouseUpCore(InteractionArguments interactionArguments)        {            InteractiveResult result = base.MouseUpCore(interactionArguments);            if ((ExtentChangedType == ExtentChangedType.TrackZoomIn || ExtentChangedType == ExtentChangedType.TrackZoomOut) && SourceFeatureLayer != null && isSelectDragKeyPressed)            {                RectangleShape targetExtent = result.NewCurrentExtent;                result.NewCurrentExtent = null;                if (!SourceFeatureLayer.IsOpen) SourceFeatureLayer.Open();                Collection queriedFeatures = SourceFeatureLayer.QueryTools.GetFeaturesInsideBoundingBox(targetExtent, ReturningColumnsType.AllColumns);                LeftClickDragKey = tempDragKey;                isSelectDragKeyPressed = false;                OnSelected(new SelectedSelectExtentInteractiveOverlayEventArgs(queriedFeatures));            }            return result;        }        protected virtual void OnSelected(SelectedSelectExtentInteractiveOverlayEventArgs e)        {            EventHandler handler = Selected;            if (handler != null)            {                handler(this, e);            }        }    }    public class SelectedSelectExtentInteractiveOverlayEventArgs : EventArgs    {        private Collection selectedFeatures;        public SelectedSelectExtentInteractiveOverlayEventArgs(IEnumerable selectedFeatures)        {            this.selectedFeatures = new Collection();            foreach (Feature feature in selectedFeatures)            {                this.selectedFeatures.Add(feature);            }        }        public Collection SelectedFeatures { get { return selectedFeatures; } }    }}`   David ---
**Author:** ![Behnam](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/b/b4bc9f/32.png) [@Behnam](https://community.thinkgeo.com/u/Behnam)\ **Post date:** [August 6, 2010, 9:51am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/13 "2010-08-06T09:51:31Z")
It works perfectly,   Many thanks ---
**Author:** ![Howard](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/h/90ced4/32.png) [@Howard](https://community.thinkgeo.com/u/Howard)\ **Post date:** [August 7, 2010, 12:32am UTC](https://community.thinkgeo.com/t/select-part-of-map/2761/14 "2010-08-07T00:32:25Z")
Hi Ben,      You are welcome, just feel free to let us know if you have more queries.      Thanks,   Howard