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trinity · #1 (**permalink**) 12-09-2005

Using C# & MP2K4, I already have a dataset that contains my Lat/Long values that I want to plot onto a map but I don't know the correct syntax inside my foreach loop. PLEASE HELP!!!!

I don't need to use GetLocation since I already have the coordinates. I just want to shove them onto a map and display them.

//populate my dataset
System.Data.DataSet myDataSet = new System.Data.DataSet();
myDataAdp.Fill(myDataSet,"myTable");

//display a map
MapPoint.Map myMap = axMappointControl1.NewMap(MapPoint.GeoMapRegion.ge oMapNorthAmerica);
MapPoint.DataSet myMapDS = myMap.DataSets.AddPushpinSet("New PushPins");

foreach(DataRow DR in myDataSet.Tables["myTable"].Rows)
{
??????????
}

Dazzer · #2 (**permalink**) 12-09-2005

You need to look at the GetLocation method

I dont know about doing this in C# but in VB .Net it would be something along the lines of

Code:

Dim objLoc as mappoint.location
Dim objMap as Mappoint.map

ObjLoc = GetLocation(50.333,-1.222, 100)


objMap.AddPushpin(objLoc)

Getlocation(Lat,Lon,Altitude)

Note this is completely untested but I have done it before and i seem to remember its something along these lines, unfortunatly i'm not near somewhere I could test it at the moment.

Dazzer · #3 (**permalink**) 12-09-2005

Sorry I didn't read your previous post properly, you said you dont need to use getlocation but perhaps you do.

Again in VB

Code:

Dim dr as datarow

For each Dr in myDataSet.Tables["myTable"].Rows


ObjLoc = GetLocation(dr("Lat"),dr("Lon"), 100) 


objMap.AddPushpin(objLoc)


Next

**Wilfried** · #4 (**permalink**) 12-09-2005

Hi,

For best results make the Altitude argumen 1 instead of 100. Many mappoint calculations get inapropriate if you view it to high

If you want to shoot someone you also want to be close to not miss the target

trinity · #5 (**permalink**) 12-09-2005

Thanks for responding so quickly, but I don't want to use GETLOCATION as I already know where it is since I have long/lat in my dataset.

Anybody else have a suggestion.? I highly appreciate it if someone can help in c# please.

Dazzer · #6 (**permalink**) 12-10-2005

What wilfred said about the altitude makes sense, I just put 100 in as an example.

trinity as I understand it your saying you dont want to use GetLocation because you already have the lat/lon but I think your missing the purpose of GetLocation.

Getlocation isn't used to return a set of coordinates but to return a location object on a set of coordinates that you pass it, as my code shows. As you already know the coordinates your working with you can put this in the GetLocation method to return a location object, once you have the location object you can place a pushpin or do whatever else it is that you need to do.

Perhaps i'm misunderstanding your question but this seems the logical answer to me.

**Wilfried** · #7 (**permalink**) 12-10-2005

Quote:

Originally Posted by trinity

GETLOCATION

Please dont use capitals. It is like you shout

If you wants to emphrase a word use _ or use single / double quotes or make it bold text. This is very common use in news / forums / email.

thanks

trinity · #8 (**permalink**) 12-12-2005

You were right, I did misunderstand GetLocation, this is what I am using now. Thank you everybody!

MapPoint.Location mapLoc;
double dblLon;
double dblLat;

foreach (DataRow dataRow in myDataSet.Tables["myTable"].Rows)
{
dblLat = Convert.ToDouble(dataRow["Latitude"]);
dblLon = Convert.ToDouble(dataRow["Longitude"]);

mapLoc = myMap.GetLocation(dblLat, dblLon, 100);
myMap.AddPushpin(mapLoc, "PP");
}

**Wilfried** · #9 (**permalink**) 12-12-2005

Hi,

Glad it works now for you

Code:

 mapLoc = myMap.GetLocation(dblLat, dblLon, 100);

Please set altitude to 1 !!! Some methods will have a high dillusion of precision if you go so hight.

Dazzer · #10 (**permalink**) 12-13-2005

Glad we could help, the Mappoint help is actually suprisingly good at explaining a lot of its methods and properties if you continue to have problems. Of course this forum is also fantastic, its helped me a lot in the past

!

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How do I loop my dataset of Lat/Long into a map using C#?

How do I loop my dataset of Lat/Long into a map using C#?

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