Search tool in MapXtreme

[dka]

Hi Group,

Is there any Out of the Box search tool available in MapXtreme, which can be used in MapXtreme web application. We are trying to provide search functionality to the Web Application. Any help would be highly appreciated.

Regards,
Deepak

[Mustafa ÖZÇETiN]

You must implement your own find tool. There is a sample app. in MapXtreme documentation named "Find". To start, you may examine this sample.

Also I can give some code snippets in C# that may be helpful. Assume that we want to write a "find street" tool in a MX web app. For that, we must write:

1) Client side (e.g. JavaScript/AJAX) code to send a parameter (e.g. street id to find) to the server
2) A FindStreet command deriving from MapBaseCommand
3) A method that will perform the actual find process, namely findStreet() below

In my implementations, I always use unique object IDs for all objects in my layers. When I, for instance, want to find a street, I get its id from the client side with JavaScript and send it to the server via a get or AJAX request. Such a request address can be

var url = "HttpHandlers/HndStreetQuery.ashx?streetId="+streetId;

in the JavaScript code, which must be sent to an Http Handler, namely HndStreetQuery.ashx

In the server side, your find command may be like:

[Serializable]
public class FindStreet : MapBaseCommand {
    public FindStreet() {
        Name = "FindStreet";
    }

    public override void Process() {
        string streetId = HttpContext.Current.Request.QueryString["streetId"];
        MapUtils.findStreet(Convert.ToInt32(streetId));
        MapControlModel model = MapControlModel.GetModelFromSession();
        MemoryStream ms = model.GetMap(MapAlias, MapWidth, MapHeight, ExportFormat);
        StreamImageToClient(ms);
    }
}

The streetId variable here is the one coming from the client streetId parameter.

With regard to the find method, it may be something like:

public static void findStreet(int id) {
    Map map = Session.Current.MapFactory[0];
    FeatureLayer findLayer = (FeatureLayer)map.Layers["STREET_LAYER"];
    Find find = new Find(findLayer.Table, findLayer.Table.TableInfo.Columns["ID"]);
    FindResult result = find.Search(id.ToString());
    if (result.ExactMatch) {
        map.Center = new DPoint(result.FoundPoint.X, result.FoundPoint.Y);
        Distance d = new Distance(0.15, map.Zoom.Unit);
        map.Zoom = d;
    }
}

Finally, I strongly recommend you to read the chapter "Web Applications, Controls, and Tools" in the MapXtreme
Developer Guide document. This chapter explains the request/response cyle step by step.

Regards,

Mustafa ÖZÇETiN
Senior Researcher

The Scientific and Technological Council of Turkiye
Ankara / Turkiye

---

From: dka <deepa...@gmail.com>
To: mapi...@googlegroups.com
Sent: Saturday, July 28, 2012 9:34 AM
Subject: [MI-L] Search tool in MapXtreme

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