SqlGeometryItem.FromWkt(String, Int32) Method

Creates the SqlGeometryItem object from the Well-Known Text.

Namespace: DevExpress.XtraMap

Assembly: DevExpress.XtraMap.v23.2.dll

NuGet Package: DevExpress.Win.Map

Declaration

C#

public static SqlGeometryItem FromWkt(
    string wktString,
    int srid
)

VB.NET

Public Shared Function FromWkt(
    wktString As String,
    srid As Integer
) As SqlGeometryItem

Parameters

Name	Type	Description
wktString	String	A String object that is a vector geometry object written as a WKT string.
srid	Int32	A Int32 object that is a Spatial Reference System Identifier (SRID).

Returns

Type	Description
SqlGeometryItem	A SqlGeometryItem object created from WKT.

Example

To manually provide vector items from the Well-Known Text, do the following.

• Create a SqlGeometryItemStorage object and assign it to the VectorItemsLayer.Data property.
• Add SqlGeometryItem objects created using the SqlGeometryItem.FromWkt method to the SqlGeometryItemStorage.Items collection.

Form1.cs

private void Form1_Load(object sender, EventArgs e) {
    SqlGeometryItemStorage storage = new SqlGeometryItemStorage();

    storage.Items.Add(SqlGeometryItem.FromWkt("POINT(-0.1275 51.507222 0 10)", 0));
    storage.Items.Add(SqlGeometryItem.FromWkt("POINT(12.5 41.9 0 10)", 1));
    storage.Items.Add(SqlGeometryItem.FromWkt("POINT(2.3508 48.8567 0 10)", 2));
    storage.Items.Add(SqlGeometryItem.FromWkt("POINT(13.38 52.52 0 10)", 3));
    storage.Items.Add(SqlGeometryItem.FromWkt("POINT(-3.68 40.4 0 10)", 4));

    VectorItemsLayer layer = new VectorItemsLayer() { Data = storage };
    layer.DataLoaded += layer_DataLoaded;
    mapControl1.Layers.Add(layer);
}

Form1.vb

Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
    Dim storage As New SqlGeometryItemStorage()

    storage.Items.Add(SqlGeometryItem.FromWkt("POINT(-0.1275 51.507222 0 10)", 0))
    storage.Items.Add(SqlGeometryItem.FromWkt("POINT(12.5 41.9 0 10)", 1))
    storage.Items.Add(SqlGeometryItem.FromWkt("POINT(2.3508 48.8567 0 10)", 2))
    storage.Items.Add(SqlGeometryItem.FromWkt("POINT(13.38 52.52 0 10)", 3))
    storage.Items.Add(SqlGeometryItem.FromWkt("POINT(-3.68 40.4 0 10)", 4))

    Dim layer As New VectorItemsLayer() With {.Data = storage}
    AddHandler layer.DataLoaded, AddressOf layer_DataLoaded
    mapControl1.Layers.Add(layer)
End Sub