How to: Show ESRI(.mxd format) in winforms

Mark_Lee · September 17, 2018, 5:51am

Hi Tamil,

We created one simple for you. Please refer FileGeoDatabaseDemo.zip (13.3 KB)

If there is any issue, please let us know that.

Thanks
Mark

Tamil_Arasan · September 17, 2018, 1:16pm

Hi Mark,

I am using your Shapes.gdb file it will show no issue.

We are using ArcGIS 10.6 and created GDB file it’s load without exception but show empty screen,

Please do the needful…

Regards,
Tamilarasan.

Ethan · September 18, 2018, 5:20am

Hi Tamil,

Please upload a sample file to us, so our developer can look into it.

Regards,

Ethan

Tamil_Arasan · September 19, 2018, 9:23am

Hi Ethan,

I tried with our GDB file its load but refer below screen shot.

1.ThinkGeo Map

ArcGIS Map

ArgMap.PNG958×718 40.6 KB

Our GDB files is more then 5 MB show not able to upload,

Please do the needful.

Regards,
Tamilarasan.

Ethan · September 19, 2018, 9:50am

Hi Tamil,

Does the two screen shots render the same data?

If your data is bigger than 5MB, you can upload that to our FTP (You can get an FTP account from our sales), or you can put that in some netdisk for example GoogleDrive, and so we can directly download it.

The data is necessary so we can look into it because our test GDB data works well.

Regards,

Ethan

Tamil_Arasan · September 19, 2018, 10:01am

Hi Ethan,

Yes , we used same data.

also use below link to get our GDB file.

Regards,
Tamilarasan.

Ethan · September 20, 2018, 3:13am

Hi Tamil,

Thanks for your data, it looks our map render the table of “SCHOOL” and the ArcGis render the table of “COUNTY”.

In fact we have the parameter “tableName” and if you want to render many layers you need to add many instance of it.

new FileGeoDatabaseFeatureLayer(gdbname,tableName,id)

Wish that’s helpful.

Regards,

Ethan

Tamil_Arasan · September 20, 2018, 3:45am

Hi Ethan,

I also tried to get all table name from GDB file.

and loop all the tables to added new FileGeoDatbaseFeatureLayer(gdbName,tablename,id)

But still showing previously mention above conversion.

I have doubt , offline map it will show same output screen with styles like ArcGIS map screen?

Or else any tool have to enable all the feature our map like you previously mention screen shot?

Regards,
Tamilarasan.

Ethan · September 20, 2018, 5:04am

Hi Tamil,

As below is rendered by GlobalMapper for “School” table.

And as below is our map render the “County” table:

Here is the sample:

9282.zip (11.7 KB)

Regards,

Ethan

Tamil_Arasan · September 20, 2018, 8:43am

Hi Ethan,

I am using map unit for DecimalDegree but your example used Meter.

Please refer below screen shot.

We already done all the functionality with MapUnit.DecimalDegree.

Please do the needful.

Regards,
Tamilarasan.

Ethan · September 20, 2018, 8:53am

Hi Tamil,

Your GDB file is under meter, if you want to use it under decimal degree, you just need to reproject it.

       private void Form1_Load(object sender, EventArgs e)
    {
        winformsMap1.MapUnit = GeographyUnit.DecimalDegree;

        LayerOverlay layerOverlay = new LayerOverlay();
        FileGeoDatabaseFeatureLayer fileGeoDatabaseFeatureLayer = new FileGeoDatabaseFeatureLayer(@"..\..\AppData\MapData.gdb", "COUNTY");

        Proj4Projection proj4 = new Proj4Projection();
        proj4.InternalProjectionParametersString = fileGeoDatabaseFeatureLayer.GetInternalProj4ProjectionParametersString();
        proj4.ExternalProjectionParametersString = Proj4Projection.GetDecimalDegreesParametersString();
        proj4.Open();

        fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.Country1;
        fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.Canal1;
        fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.City1;
        fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

        fileGeoDatabaseFeatureLayer.FeatureSource.Projection = proj4;

        layerOverlay.Layers.Add(fileGeoDatabaseFeatureLayer);
        winformsMap1.Overlays.Add(layerOverlay);

        fileGeoDatabaseFeatureLayer.Open();
        winformsMap1.CurrentExtent = fileGeoDatabaseFeatureLayer.GetBoundingBox();
        winformsMap1.Refresh();
    }

Wish that’s helpful.

Regards,

Ethan

Tamil_Arasan · September 20, 2018, 12:44pm

Hi Ethan,

May i know , How to find map unit for GDB?

Regards,
Tamilarasan

Ethan · September 21, 2018, 2:08am

Hi Tamil,

You can use this code:

    fileGeoDatabaseFeatureLayer.Open();
    winformsMap1.CurrentExtent = fileGeoDatabaseFeatureLayer.GetBoundingBox();

If the point of CurrentExtent is in the range between -180 and 180, it may be DecimalDegree, if it’s a big value it must be meter.

Regards,

Ethan

Tamil_Arasan · September 21, 2018, 8:03am

Hi Ethan ,

I want to load all Layer from the GDB file.

I loop through all table from GDB file its throw object null reference error.

Please do the needful.

Code

  private void Form1_Load(object sender, EventArgs e)
    {
        winformsMap1.MapUnit = GeographyUnit.DecimalDegree;

        //NewMethod("COUNTY");
        //NewMethod("SCHOOL");
        
        Collection<string> tables = FileGeoDatabaseFeatureLayer.GetTableNames(@"..\..\AppData\MapData.gdb");
        foreach (string strem in tables)
        {
            NewMethod(strem);
        }

        winformsMap1.Refresh();
    }

    private void NewMethod(string str)
    {
        try
        {
            LayerOverlay layerOverlay = new LayerOverlay();
            FileGeoDatabaseFeatureLayer fileGeoDatabaseFeatureLayer = new FileGeoDatabaseFeatureLayer(@"..\..\AppData\MapData.gdb", str);

            Proj4Projection proj4 = new Proj4Projection();
            proj4.InternalProjectionParametersString = fileGeoDatabaseFeatureLayer.GetInternalProj4ProjectionParametersString();
            proj4.ExternalProjectionParametersString = Proj4Projection.GetDecimalDegreesParametersString();
            proj4.Open();

            fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.Country1;
            fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.Canal1;
            fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.City1;
            fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

            fileGeoDatabaseFeatureLayer.FeatureSource.Projection = proj4;

            layerOverlay.Layers.Add(fileGeoDatabaseFeatureLayer);
            winformsMap1.Overlays.Add(layerOverlay);

            fileGeoDatabaseFeatureLayer.Open();
            winformsMap1.CurrentExtent = fileGeoDatabaseFeatureLayer.GetBoundingBox();
            winformsMap1.Refresh();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }

Also attach my screen shot.

Thanks,
Tamilarasan.

Ethan · September 21, 2018, 10:21am

Hi Tamil,

You can modify your code like this:

public partial class Form1 : Form
{
    bool IsFirstLayer = true;
    string fileGeoDatabaseFeatureLayerProjectionString;

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {            
        winformsMap1.MapUnit = GeographyUnit.DecimalDegree;            

        Collection<string> tables = FileGeoDatabaseFeatureLayer.GetTableNames(@"..\..\AppData\MapData.gdb");

        LayerOverlay layerOverlay = new LayerOverlay();

        foreach (string table in tables)
        {
            FileGeoDatabaseFeatureLayer layer = GetLayer(table.Substring(1));                

            layerOverlay.Layers.Add(layer);

            if (IsFirstLayer)
            {
                winformsMap1.CurrentExtent = layer.GetBoundingBox();
                IsFirstLayer = false;
            }
            else
            {
                winformsMap1.CurrentExtent.ExpandToInclude(layer.GetBoundingBox());
            }
        }

        
        winformsMap1.Overlays.Add(layerOverlay);
        winformsMap1.Refresh();
    }

    private FileGeoDatabaseFeatureLayer GetLayer(string tableName)
    {
        FileGeoDatabaseFeatureLayer fileGeoDatabaseFeatureLayer = new FileGeoDatabaseFeatureLayer(@"..\..\AppData\MapData.gdb", tableName);

        if (IsFirstLayer)
        {                
            fileGeoDatabaseFeatureLayerProjectionString = fileGeoDatabaseFeatureLayer.GetInternalProj4ProjectionParametersString();
        }

        Proj4Projection proj4 = new Proj4Projection();
        proj4.InternalProjectionParametersString = fileGeoDatabaseFeatureLayerProjectionString;
        proj4.ExternalProjectionParametersString = Proj4Projection.GetDecimalDegreesParametersString();
        proj4.Open();

        fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.Country1;
        fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.Canal1;
        fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.City1;
        fileGeoDatabaseFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

        fileGeoDatabaseFeatureLayer.FeatureSource.Projection = proj4;

        fileGeoDatabaseFeatureLayer.Open();

        return fileGeoDatabaseFeatureLayer;
    }
}

In fact I don’t suggest you render the layer like this, it looks not so well.

You should want to write render logic for each layer, and assign a best current extent so it looks better.

Regards,

Ethan

Tamil_Arasan · September 21, 2018, 12:18pm

Hi Ethan,

Thanks for your update.!.

Please suggestion us to which layer projection seems look good to get from GDB file?

And how i find the layer from GDB file?

Thanks,
Tamilarasan.

Rex_Liu · September 24, 2018, 10:25am

Hi Tamil,

Please refer the below details about your questions:

Using which projection is up to you. The reprojection affects the performance of map rendering, so we suggest you reduce reprojection. You should set map unit according to the projection that your data uses the most to reduce reprojection.

Please refer the below code to get the projection:

    var projections = new Collection<string>();
    foreach (var tableName in tableNames)
    {
        var layer = new FileGeoDatabaseFeatureLayer(@"..\..\AppData\MapData.gdb", tableName.Substring(1));
        layer.Open();
        var projection = layer.GetInternalProj4ProjectionParametersString();
        projections.Add(projection);
    }
   var projectionGroups = projections.GroupBy(proj => proj);
   var selectedProj = projectionGroups.First(p => p.Count() == projectionGroups.Max(g => g.Count())).Key;

If you have any questions, please feel free to contact us.

Thanks,

Tamil_Arasan · September 24, 2018, 11:22am

Hi Rex,

Thanks for your update.

Name should not display in the Layer like Street name.

Please do the needful.

Thanks,
Tamilarasan.

Tamil_Arasan · September 24, 2018, 4:14pm

Hi Team,

Now i am testing with different GDB file.

But some layer throw exception.

Please refer my screen shot.

Regards,
Tamilarasan.

Ethan · September 25, 2018, 6:09am

Hi Tamil,

If you want to show label, I think you need to set the correct text style for layer.
If you met exception please find which layer have the problem, and just like the exception shows:

Please make sure the column which you used in code is exist in the data.

Regards,

Ethan