Get the index number for the specified layer name.
[C#]
///<summary>Get the index number for the specified layer name.</summary> /// ///<param name="activeView">An IActiveView interface</param> ///<param name="layerName">A System.String that is the layer name in the active view. Example: "states"</param> /// ///<returns>A System.Int32 representing a layer number</returns> /// ///<remarks>Return values of 0 and greater are valid layers. A return value of -1 means the layer name was not found.</remarks> public System.Int32 GetIndexNumberFromLayerName(ESRI.ArcGIS.Carto.IActiveView activeView, System.String layerName) { if(activeView == null || layerName == null) { return -1; } ESRI.ArcGIS.Carto.IMap map = activeView.FocusMap; // Get the number of layers int numberOfLayers = map.LayerCount; // Loop through the layers and get the correct layer index for (System.Int32 i = 0; i < numberOfLayers; i++) { if (layerName == map.get_Layer(i).Name) { // Layer was found return i; } } // No layer was found return -1; }
[Visual Basic .NET]
'''<summary>Get the index number for the specified layer name.</summary> ''' '''<param name="activeView">An IActiveView interface</param> '''<param name="layerName">A System.String that is the layer name in the active view. Example: "states"</param> ''' '''<returns>A System.Int32 representing a layer number</returns> ''' '''<remarks>Return values of 0 and greater are valid layers. A return value of -1 means the layer name was not found.</remarks> Public Function GetIndexNumberFromLayerName(ByVal activeView As ESRI.ArcGIS.Carto.IActiveView, ByVal layerName As System.String) As System.Int32 If activeView Is Nothing OrElse layerName Is Nothing Then Return -1 End If Dim map As ESRI.ArcGIS.Carto.IMap = activeView.FocusMap ' Get the number of layers Dim numberOfLayers As System.Int32 = map.LayerCount ' Loop through the layers and get the correct layer index Dim i As System.Int32 = 0 Do While i < numberOfLayers If layerName = map.Layer(i).Name Then ' Layer was found Return i End If i += 1 Loop ' No layer was found Return -1 End Function