How to: Load Data from a SQL Geometry Datasource

• Jun 07, 2019
• 2 minutes to read

To load shapes from a SQL Geometry datasource, do the following.

1. Create a SqlGeometryDataAdapter object and assign it to the VectorLayer.Data property.
2. Specify the SqlGeometryDataAdapter.ConnectionString, SqlGeometryDataAdapter.SpatialDataMember and SqlGeometryDataAdapter.SqlText properties.

Note

All table fields of the SQL data table loaded from the database will be provided as attributes values for each SqlGeometryItem object generated by the SqlGeometryDataAdapter.

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-load-shapes-from-a-sql-geometry-datasource-t180275.

MainWindow.xaml.vb

Imports System
Imports System.IO
Imports System.Windows

Namespace SqlGeometryDataAdapterExample
    Partial Public Class MainWindow
        Inherits Window

        Private Const dbPath As String = "..\..\..\Data\SQLG.mdf"


        Private connectionString_Renamed As String = "Data Source=(local);AttachDbFileName=" & Path.GetFullPath(Path.Combine(System.Reflection.Assembly.GetEntryAssembly().Location, dbPath)) & ";Database=SqlGeometryDemoDB;Integrated Security=True;MultipleActiveResultSets=True"
        Public ReadOnly Property ConnectionString() As String
            Get
                Return connectionString_Renamed
            End Get
        End Property

        Public Sub New()
            InitializeComponent()
            Me.DataContext = ConnectionString
        End Sub
    End Class
End Namespace

MainWindow.xaml

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxm="http://schemas.devexpress.com/winfx/2008/xaml/map"
        x:Class="SqlGeometryDataAdapterExample.MainWindow"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <dxm:MapControl>
            <dxm:VectorLayer>
                <dxm:VectorLayer.ShapeTitleOptions>
                    <dxm:ShapeTitleOptions Pattern="{}{TextCol}"
                                           Visible="True"/>
                </dxm:VectorLayer.ShapeTitleOptions>
                <dxm:SqlGeometryDataAdapter SqlText = "SELECT [id],[GeomCol1],[TextCol] FROM [dbo].[DemoTable]" 
                                            SpatialDataMember = "GeomCol1" ConnectionString="{Binding}"/>
            </dxm:VectorLayer>
        </dxm:MapControl>
    </Grid>
</Window>

MainWindow.xaml.cs

using System;
using System.IO;
using System.Windows;

namespace SqlGeometryDataAdapterExample {
    public partial class MainWindow : Window {
        const string dbPath = "..\\..\\..\\Data\\SQLG.mdf";

        string connectionString = "Data Source=(local);AttachDbFileName=" +
            Path.GetFullPath(Path.Combine(System.Reflection.Assembly.GetEntryAssembly().Location, dbPath)) +
            ";Database=SqlGeometryDemoDB;Integrated Security=True;MultipleActiveResultSets=True";
        public String ConnectionString { get { return connectionString; } }

        public MainWindow() {
            InitializeComponent();
            this.DataContext = ConnectionString;
        }
    }
}