BingSearchDataProvider.SearchCompleted Event

Occurs when a search operation has been completed.

Namespace: DevExpress.XtraMap

Assembly: DevExpress.XtraMap.v23.2.dll

NuGet Package: DevExpress.Win.Map

Declaration

C#

public event BingSearchCompletedEventHandler SearchCompleted

VB.NET

Public Event SearchCompleted As BingSearchCompletedEventHandler

Event Data

The SearchCompleted event's data class is BingSearchCompletedEventArgs. The following properties provide information specific to this event:

Property	Description
Cancelled	Gets a value indicating whether an asynchronous operation has been canceled. Inherited from AsyncCompletedEventArgs.
Error	Gets a value indicating which error occurred during an asynchronous operation. Inherited from AsyncCompletedEventArgs.
RequestResult	Returns the result of the search request. Inherited from SearchCompletedEventArgs.
UserState	Gets the unique identifier for the asynchronous task. Inherited from AsyncCompletedEventArgs.

The event data class exposes the following methods:

Method	Description
RaiseExceptionIfNecessary()	Raises a user-supplied exception if an asynchronous operation failed. Inherited from AsyncCompletedEventArgs.

Example

To manually generate map items for received GIS data, do the following.

• Set the InformationDataProviderBase.GenerateLayerItems property to false.
• Handle the Geocode data received event of the Bing geocode data provider (BingSearchDataProvider.SearchCompleted).
• In the event handler, implement map item generation based on information stored in the SearchRequestResult.SearchResults array of LocationInformation objects.

Form1.cs

using DevExpress.XtraEditors;
using DevExpress.XtraMap;
using System;
using System.Text;

namespace MapControl_SearchProcessing {
    public partial class Form1 : XtraForm {

        string BingKey { get { return "YourBingKey"; } }

        public Form1() {
            InitializeComponent();
            SearchProvider.SearchCompleted += OnSearchCompleted;
            SearchLayer.DataRequestCompleted += OnDataRequestCompleted;
            BingMapDataProvider.BingKey = BingKey;
            SearchProvider.BingKey = BingKey;
        }

        private void btnSearch_Click(object sender, EventArgs e) {
            SearchProvider.Search(teKeyword.Text);
        }

        #region #SearchResultProcessing
        void OnSearchCompleted(object sender, BingSearchCompletedEventArgs e) {
            if(e.Cancelled) return;
            if(e.RequestResult.ResultCode != RequestResultCode.Success) {
                meResult.Text = "The Bing Search service does not work for this location.";
                return;
            }

            StringBuilder resultList = new StringBuilder("");
            int resCounter = 1;
            foreach(BingLocationInformation resultInfo in e.RequestResult.SearchResults) {
                resultList.Append(String.Format("Result {0}:  \r\n", resCounter));
                resultList.Append(String.Format("Name: {0}\r\n", resultInfo.DisplayName));              
                resultList.Append(String.Format("Address: {0}\r\n", resultInfo.Address.FormattedAddress));
                resultList.Append(String.Format("Confidence level: {0}\r\n", resultInfo.Confidence));
                resultList.Append(String.Format("Geographic coordinates:  {0}\r\n", resultInfo.Location));
                resultList.Append(String.Format("Match code: {0}\r\n", resultInfo.MatchCode));
                resultList.Append(String.Format("______________________________\r\n"));
                resCounter++;
            }
            meResult.Text = resultList.ToString();
        }
        #endregion #SearchResultProcessing

        void OnDataRequestCompleted(object sender, RequestCompletedEventArgs e) {
            mapControl.ZoomToFitLayerItems(0.4);
        }
    }
}

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MapControl_SearchProcessing {
    static class Program {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}

Form1.vb

Imports DevExpress.XtraEditors
Imports DevExpress.XtraMap
Imports System
Imports System.Text

Namespace MapControl_SearchProcessing
    Partial Public Class Form1
        Inherits XtraForm

        Private ReadOnly Property BingKey() As String
            Get
                Return "YourBingKey"
            End Get
        End Property

        Public Sub New()
            InitializeComponent()
            AddHandler SearchProvider.SearchCompleted, AddressOf OnSearchCompleted
            AddHandler SearchLayer.DataRequestCompleted, AddressOf OnDataRequestCompleted
            BingMapDataProvider.BingKey = BingKey
            SearchProvider.BingKey = BingKey
        End Sub

        Private Sub btnSearch_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnSearch.Click
            SearchProvider.Search(teKeyword.Text)
        End Sub

        #Region "#SearchResultProcessing"
        Private Sub OnSearchCompleted(ByVal sender As Object, ByVal e As BingSearchCompletedEventArgs)
            If e.Cancelled Then
                Return
            End If
            If e.RequestResult.ResultCode <> RequestResultCode.Success Then
                meResult.Text = "The Bing Search service does not work for this location."
                Return
            End If

            Dim resultList As New StringBuilder("")
            Dim resCounter As Integer = 1
            For Each resultInfo As BingLocationInformation In e.RequestResult.SearchResults
                resultList.Append(String.Format("Result {0}:  " & ControlChars.CrLf, resCounter))
                resultList.Append(String.Format("Name: {0}" & ControlChars.CrLf, resultInfo.DisplayName))
                resultList.Append(String.Format("Address: {0}" & ControlChars.CrLf, resultInfo.Address.FormattedAddress))
                resultList.Append(String.Format("Confidence level: {0}" & ControlChars.CrLf, resultInfo.Confidence))
                resultList.Append(String.Format("Geographic coordinates:  {0}" & ControlChars.CrLf, resultInfo.Location))
                resultList.Append(String.Format("Match code: {0}" & ControlChars.CrLf, resultInfo.MatchCode))
                resultList.Append(String.Format("______________________________" & ControlChars.CrLf))
                resCounter += 1
            Next resultInfo
            meResult.Text = resultList.ToString()
        End Sub
        #End Region ' #SearchResultProcessing

        Private Sub OnDataRequestCompleted(ByVal sender As Object, ByVal e As RequestCompletedEventArgs)
            mapControl.ZoomToFitLayerItems(0.4)
        End Sub
    End Class
End Namespace

Program.vb

Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Threading.Tasks
Imports System.Windows.Forms

Namespace MapControl_SearchProcessing
    Friend NotInheritable Class Program

        Private Sub New()
        End Sub

        ''' <summary>
        ''' The main entry point for the application.
        ''' </summary>
        <STAThread> _
        Shared Sub Main()
            Application.EnableVisualStyles()
            Application.SetCompatibleTextRenderingDefault(False)
            Application.Run(New Form1())
        End Sub
    End Class
End Namespace

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the SearchCompleted event.

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#

winforms-map-execute-the-search-operation-for-multiple-locations/CS/GetSearchLocationAdditionalInfo/Form1.cs#L21

PrepareMap();
searchProvider.SearchCompleted +=
    new BingSearchCompletedEventHandler(searchDataProvider_SearchCompleted);

VB.NET

winforms-map-execute-the-search-operation-for-multiple-locations/VB/GetSearchLocationAdditionalInfo/Form1.vb#L24

    PrepareMap()
    AddHandler searchProvider.SearchCompleted, New BingSearchCompletedEventHandler(AddressOf searchDataProvider_SearchCompleted)
End Sub