MapLineMappingInfo Class

Contains information about mappings that are used to obtain line data from a source.

Namespace: DevExpress.Xpf.Map

Assembly: DevExpress.Xpf.Map.v21.2.dll

NuGet Package: DevExpress.Wpf.Map

Declaration

C#

public class MapLineMappingInfo :
    MapItemMappingInfo

VB.NET

Public Class MapLineMappingInfo
    Inherits MapItemMappingInfo

Remarks

Use MapLineMappingInfo to specify mappings that are used by a ListSourceDataAdapter to load line data from a source. To generate lines and configure their settings, create a MapLineSettings object and assign it to the ListSourceDataAdapter.ItemSettings property. The MapLineMappingInfo class introduces the following properties:

• Point1 – Defines the name of a data source field that stores information about the start line point.
• Point2 – Defines the name of a data source field that stores information about the end line point.

Example

How to: Generate Lines from a Data Source

This example demonstrates how to generate map lines based on data source objects and how to display these lines on a vector layer.

1. Create a ListSourceDataAdapter object and assign it to the VectorLayer.Data property.

2. Specify the adapter’s DataSource property.

3. Create a MapLineMappingInfo object and assign to the adapter’s Mappings property.

4. Map the following properties to data source fields:

   • Point1 – Specifies a data field that contains information about the first line point.
   • Point2 – Specifies a data field that contains information about the second line point.
   • Latitude – Specifies a data field that contains point latitudes. (Use the YCoordinate property for Cartesian coordinate systems.)
   • Longitude – Specifies a data field that contains point longitudes. (Use the XCoordinate property for Cartesian coordinate systems.)

5. To specify the type of created map items, you should assign the appropriate settings to the ListSourceDataAdapter.ItemSettings property. In this example, use MapLineSettings to draw lines.

XAML

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:MapApp"
        xmlns:dxm="http://schemas.devexpress.com/winfx/2008/xaml/map" 
        x:Class="MapApp.MainWindow"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <dxm:MapControl x:Name="mapControl">
            <dxm:ImageLayer>
                <dxm:BingMapDataProvider Kind="RoadGray" 
                                         BingKey="Insert your Bing key here." />
            </dxm:ImageLayer>
            <dxm:VectorLayer x:Name="vectorLayer" DataLoaded="OnVectorLayerDataLoaded">
                <dxm:VectorLayer.Data>
                    <dxm:ListSourceDataAdapter x:Name="listSourceDataAdapter" 
                                               DataSource="{Binding}">
                        <dxm:ListSourceDataAdapter.Mappings>
                            <dxm:MapLineMappingInfo Latitude="X" 
                                                    Longitude="Y"
                                                    Point1="StartPoint"
                                                    Point2="EndPoint"/>
                        </dxm:ListSourceDataAdapter.Mappings>
                        <dxm:ListSourceDataAdapter.ItemSettings>
                            <dxm:MapLineSettings Stroke="Red">
                                <dxm:MapLineSettings.EndLineCap>
                                    <dxm:MapLineCap/>
                                </dxm:MapLineSettings.EndLineCap>
                                <dxm:MapLineSettings.StrokeStyle>
                                    <dxm:StrokeStyle Thickness="2"/>
                                </dxm:MapLineSettings.StrokeStyle>
                            </dxm:MapLineSettings>
                        </dxm:ListSourceDataAdapter.ItemSettings>
                    </dxm:ListSourceDataAdapter>
                </dxm:VectorLayer.Data>
            </dxm:VectorLayer>
        </dxm:MapControl>
    </Grid>
</Window>

C#

using DevExpress.Xpf.Map;
using System.Collections.ObjectModel;
using System.Windows;

namespace MapApp {
    public partial class MainWindow : Window {
        ObservableCollection<Line> Data { get; set; }
        public MainWindow() {
            InitializeComponent();
            Data = new ObservableCollection<Line>();
            Line line1 = new Line(new Coordinate(-5.93107, -35.112723), new Coordinate(4.253438, 5.47072));
            Data.Add(line1);
            Line line2 = new Line(new Coordinate(-17.21382, 11.504151), new Coordinate(-22.1531, -41.45984));
            Data.Add(line2);
            this.DataContext = Data;
        }
        private void OnVectorLayerDataLoaded(object sender, DataLoadedEventArgs e) {
            mapControl.ZoomToFitLayerItems(new LayerBase[] { vectorLayer }, paddingFactor: 0.3);
        }
    }
    public struct Coordinate {
        public double X { get; set; }
        public double Y { get; set; }
        public Coordinate(double x, double y) {
            X = x;
            Y = y;
        }
    }
    public class Line {
        public Coordinate StartPoint { get; set; }
        public Coordinate EndPoint { get; set; }
        public Line(Coordinate p1, Coordinate p2) {
            this.StartPoint = p1;
            this.EndPoint = p2;
        }
    }
}

VB.NET

Imports DevExpress.Xpf.Map
Imports System.Collections.ObjectModel
Namespace MapApp
    Public Partial Class MainWindow
        Inherits Window
        Private Property Data As ObservableCollection(Of Line)
        Public Sub New()
            InitializeComponent()
            Data = New ObservableCollection(Of Line)()
            Dim line1 As Line = New Line(New Coordinate(-5.93107, -35.112723), New Coordinate(4.253438, 5.47072))
            Data.Add(line1)
            Dim line2 As Line = New Line(New Coordinate(-17.21382, 11.504151), New Coordinate(-22.1531, -41.45984))
            Data.Add(line2)
            Me.DataContext = Data
        End Sub
        Private Sub OnVectorLayerDataLoaded(ByVal sender As Object, ByVal e As DataLoadedEventArgs)
            mapControl.ZoomToFitLayerItems(New LayerBase() {vectorLayer}, paddingFactor:=0.3)
        End Sub
    End Class
    Public Structure Coordinate
        Public Property X As Double
        Public Property Y As Double
        Public Sub New(ByVal x As Double, ByVal y As Double)
            Me.X = x
            Me.Y = y
        End Sub
    End Structure
    Public Class Line
        Public Property StartPoint As Coordinate
        Public Property EndPoint As Coordinate

        Public Sub New(ByVal p1 As Coordinate, ByVal p2 As Coordinate)
            StartPoint = p1
            EndPoint = p2
        End Sub
    End Class
End Namespace

Inheritance

Object

DispatcherObject

DependencyObject

Freezable

MapDependencyObject

MapPointMappingInfoBase

MapItemMappingInfoBase

MapItemMappingInfo

MapLineMappingInfo