RequestResultBase Class

The base for all classes that contain results of requests to web services.

Assembly: DevExpress.Xpf.Map.v20.1.dll

Declaration

C#
VB.NET

public abstract class RequestResultBase

Public MustInherit Class RequestResultBase

Examples

This example demonstrates how to manually process received Bing Search request results.

Create a InformationLayer object and add it to the MapControl.Layers collection. Assign the BingSearchDataProvider object to the InformationLayer.DataProvider property.
Handle the BingSearchDataProvider.SearchCompleted event. In the event handler, implement the request result processing.

NOTE

If you run the application, and see a window with the following error message: ”The specified Bing Maps key is invalid. To create a developer account, refer to https://www.microsoft.com/en-us/maps/create-a-bing-maps-key”, refer to the following tutorial: How to: Get a Bing Maps Key.

NOTE

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-manually-process-search-using-a-custom-search-panel-t189413.

MainWindow.xaml.vb
MainWindow.xaml.cs

Private Sub searchProvider_SearchCompleted(ByVal sender As Object, ByVal e As BingSearchCompletedEventArgs)
    If e.Cancelled Then
        Return
    End If
    If e.RequestResult.ResultCode <> RequestResultCode.Success Then
        Return
    End If

    Dim sb As New StringBuilder()

    Dim requestResult As SearchRequestResult = e.RequestResult
    sb.Append(String.Format("Result Code: {0}" & vbLf, requestResult.ResultCode))
    If String.IsNullOrEmpty(requestResult.FaultReason) Then
        sb.Append(String.Format("Fault Reason: (none)" & vbLf, requestResult.FaultReason))
    Else
        sb.Append(String.Format("Fault Reason: {0}" & vbLf, requestResult.FaultReason))
    End If
    sb.Append(String.Format("Search Location: {0}" & vbLf, requestResult.Keyword))
    sb.Append(String.Format("Estimated Matches: {0}" & vbLf, requestResult.EstimatedMatches))
    sb.Append(String.Format("SearchResults:" & vbLf & "{0}", ProcessLocationList(requestResult.SearchResults)))

    tbSearchResult.Text = sb.ToString()

End Sub

Private Function ProcessLocationList(ByVal results As List(Of LocationInformation)) As String
    If results Is Nothing Then
        Return ""
    End If

    Dim sb As New StringBuilder()
    For i As Integer = 0 To results.Count - 1
        sb.Append(String.Format("{0}) {1}", i + 1, ProcessLocationInformation(results(i))))
    Next i
    Return sb.ToString()
End Function
Private Function ProcessLocationInformation(ByVal info As LocationInformation) As String
    If info Is Nothing Then
        Return ""
    End If

    Dim sb As New StringBuilder()

    sb.Append(String.Format("{0}" & vbLf, info.DisplayName))
    sb.Append(String.Format(vbTab & "Adress: {0}" & vbLf, info.Address))
    sb.Append(String.Format(vbTab & "Location: {0}" & vbLf, info.Location))
    Return sb.ToString()
End Function

private void searchProvider_SearchCompleted(object sender, BingSearchCompletedEventArgs e) {
    if (e.Cancelled) return;
    if (e.RequestResult.ResultCode != RequestResultCode.Success) return;

    StringBuilder sb = new StringBuilder();

    SearchRequestResult requestResult = e.RequestResult;
    sb.Append(String.Format("Result Code: {0}\n", requestResult.ResultCode));
    if (String.IsNullOrEmpty(requestResult.FaultReason))
        sb.Append(String.Format("Fault Reason: (none)\n", requestResult.FaultReason));
    else
        sb.Append(String.Format("Fault Reason: {0}\n", requestResult.FaultReason));
    sb.Append(String.Format("Search Location: {0}\n", requestResult.Keyword));
    sb.Append(String.Format("Estimated Matches: {0}\n", requestResult.EstimatedMatches));
    sb.Append(String.Format("SearchResults:\n{0}", ProcessLocationList(requestResult.SearchResults)));

    tbSearchResult.Text = sb.ToString();

}

string ProcessLocationList(List<LocationInformation> results) {
    if (results == null) return "";

    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < results.Count; i++) {
        sb.Append(String.Format("{0}) {1}", i + 1, ProcessLocationInformation(results[i])));
    }
    return sb.ToString();
}
string ProcessLocationInformation(LocationInformation info) {
    if (info == null) return "";

    StringBuilder sb = new StringBuilder();

    sb.Append(String.Format("{0}\n", info.DisplayName));
    sb.Append(String.Format("\tAdress: {0}\n", info.Address));
    sb.Append(String.Format("\tLocation: {0}\n", info.Location));
    return sb.ToString();
}