MapItem.Attributes Property

Gets the attributes for this map item.

Namespace: DevExpress.XtraMap

Assembly: DevExpress.XtraMap.v19.1.dll

Declaration

C#

public MapItemAttributeCollection Attributes { get; }

VB.NET

Public ReadOnly Property Attributes As MapItemAttributeCollection

Property Value

Type	Description
MapItemAttributeCollection	A MapItemAttributeCollection object.

Remarks

Attributes are used to associate a vector item with supplementary information. A vector item is represented by the MapItemAttribute object. This object can be accessed as an item of the MapItemAttributeCollection object returned by the MapItem.Attributes property of the MapItem class descendant.

For more information on map item attributes, see Provide Data Using Vector Item Attributes.

Example

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-color-manually-added-shapes-using-the-choropleth-colorizer-e4744

Form1.cs

private MapPolygon CreatePolygon(double areaValue, string polygonName, GeoPoint[] points) {
    MapPolygon item = new MapPolygon();

    item.Attributes.Add(new MapItemAttribute() {
        Name = areaValueAttrName,
        Type = typeof(double),
        Value = areaValue
    });
    item.Attributes.Add(new MapItemAttribute() {
        Name = polygonNameAttrName,
        Type = typeof(string),
        Value = polygonName
    });

    item.ToolTipPattern = "{" + polygonNameAttrName + "}=<b>{" + areaValueAttrName + "}</b>";

    foreach (GeoPoint point in points) {
        item.Points.Add(point);
    }

    return item;
}

Form1.vb

Private Function CreatePolygon(ByVal areaValue As Double, ByVal polygonName As String, ByVal points() As GeoPoint) As MapPolygon
    Dim item As New MapPolygon()

    item.Attributes.Add(New MapItemAttribute() With {.Name = areaValueAttrName, .Type = GetType(Double), .Value = areaValue})
    item.Attributes.Add(New MapItemAttribute() With {.Name = polygonNameAttrName, .Type = GetType(String), .Value = polygonName})

    item.ToolTipPattern = "{" & polygonNameAttrName & "}=<b>{" & areaValueAttrName & "}</b>"

    For Each point As GeoPoint In points
        item.Points.Add(point)
    Next point

    Return item
End Function

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the Attributes property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

vote-app-t445500/CS/VoteApp/MapColorizer.cs#L34

foreach(var item in mapItems) {
    var state = StateFromMapAttribute(item.Attributes);
    if(state != null) {

vote-applications-t446758/CS/VoteApp/MapColorizer.cs#L34

foreach(var item in mapItems) {
    var state = StateFromMapAttribute(item.Attributes);
    if(state != null) {