Adds SampleCsExportSvgWithDialog example for exporting an svg using t…

…he print dialog.

rhinocommon/cs/SampleCsCommands/SampleCsCommands.csproj

@@ -55,6 +55,7 @@
     <Reference Include="System.Drawing" />
     <Reference Include="System.Windows.Forms" />
     <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Xml" />
     <Reference Include="Xfinium.Pdf.Win">
       <HintPath>C:\Program Files\Rhino 7\Plug-ins\Xfinium.Pdf.Win.dll</HintPath>
     </Reference>
@@ -83,6 +84,7 @@
     <Compile Include="SampleCsDrawPin.cs" />
     <Compile Include="SampleCsDuplicateObjectFromNameTag.cs" />
     <Compile Include="SampleCsExportDXF.cs" />
+    <Compile Include="SampleCsExportSvgWithDialog.cs" />
     <Compile Include="SampleCsExtractInflectionPoints.cs" />
     <Compile Include="SampleCsExtractMinMaxRadiusPoints.cs" />
     <Compile Include="SampleCsExtrudeMeshFace.cs" />

rhinocommon/cs/SampleCsCommands/SampleCsExportSvgWithDialog.cs

@@ -0,0 +1,59 @@
+using System;
+using Eto.Forms;
+using Rhino;
+using Rhino.Commands;
+using Rhino.UI.Forms;
+using Rhino.UI;
+using Command = Rhino.Commands.Command;
+
+namespace SampleCsCommands
+{
+  /// <summary>
+  /// Exports the contents of the 3dm file to an svg via the print dialog.
+  /// The print dialog is automatically configured for SVG exporting. 
+  /// </summary>
+  public class SampleCsExportSvgWithDialog : Command
+  {
+    public override string EnglishName => "SampleCsExportSvgWithDialog";
+
+    protected override Result RunCommand(RhinoDoc doc, RunMode mode)
+    {
+
+      //Create an ETO file save dialog
+      var save_dialog = new Eto.Forms.SaveFileDialog()
+      {
+        CheckFileExists = false,
+        Title = "Export SVG"
+      };
+
+      //Add an SVG filter to the save dialog
+      save_dialog.Filters.Add(new FileFilter("Export", "*.svg"));
+      save_dialog.CurrentFilter = save_dialog.Filters[0];
+
+      //Show the file save dialog
+      var result = save_dialog.ShowDialog(RhinoEtoApp.MainWindow);
+      if (result != DialogResult.Ok)
+        return Result.Cancel;
+
+      //The previous Print dialog settings are stored in the Commands.rhp plug-in. We can get its previous settings directly from the plug-in. 
+      Guid.TryParse("02bf604d-799c-4cc2-830e-8d72f21b14b7", out var commands_id);
+
+      //Show the Print Dialog configured for SVG export. 
+      var svg_export_view_capture_settings = PrintDialogUi.EtoExportSvg(doc.RuntimeSerialNumber, PersistentSettings.FromPlugInId(commands_id));
+
+      if (svg_export_view_capture_settings == null)
+        return Result.Cancel;
+
+      //Get the SVG Xml settings from the ViewCapture. 
+      var capture_to_svg = Rhino.Display.ViewCapture.CaptureToSvg(svg_export_view_capture_settings);
+      if (capture_to_svg == null)
+        return Result.Cancel;
+
+      //Save the xml to disk
+      capture_to_svg.Save(save_dialog.FileName);
+
+
+      return Result.Success;
+    }
+  }
+}