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<title>Construct Arc Example (C#)</title>
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<h1>Construct Arc Example (C#)</h1>
<p>This example shows how to construct an Arc.</p>
<pre>//--------------------------------------------------------------
// Preconditions:
// 1. Create a C# Windows console project.
// 2. Copy and paste this example into the C# IDE.
// 3. Add a reference to:
// <i>install_dir</i>\<b>APISDK\tlb\DraftSight.Interop.dsAutomation.dll</b>.
// 4. Add references to <b>System</b> and <b>System.Windows.Forms</b>.
// 5. Start DraftSight and open a document.
// 6. Start debugging the project.
//
// Postconditions: A message box pops up when an Arc is
// constructed in the drawing document.
//----------------------------------------------------------------
using DraftSight.Interop.dsAutomation;
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;</pre>
<pre>static class Module1
{
public static void Main()
{
DraftSight.Interop.dsAutomation.Application dsApp;
Document dsDoc = default(Document);
Model dsModel = default(Model);
SketchManager dsSketchManager = default(SketchManager);
CircleArc dsArc = default(CircleArc);
double centerX = 0;
double centerY = 0;
double centerZ = 0;
double radius = 0;
double startAngle = 0;
double endAngle = 0;</pre>
<pre> //Connect to DraftSight
dsApp = (DraftSight.Interop.dsAutomation.Application)Marshal.GetActiveObject("DraftSight.Application");
dsApp.<b>AbortRunningCommand</b>(); // abort any command currently running in DraftSight to avoid nested commands
//Get active document
dsDoc = dsApp.<b>GetActiveDocument</b>();
if (dsDoc != null)
{
//Get model space
dsModel = dsDoc.<b>GetModel</b>();
//Get Sketch Manager
dsSketchManager = dsModel.<b>GetSketchManager</b>();
//Arc parameters (start and end angle values should be in radians)
centerX = 0.0;
centerY = 0.0;
centerZ = 0.0;
radius = 4.0;
startAngle = 0.0;
endAngle = Math.PI;</pre>
<pre> //Construct an Arc
dsArc = dsSketchManager.<b>InsertArc</b>(centerX, centerY, centerZ, radius, startAngle, endAngle);
if (dsArc != null)
{
MessageBox.Show("An Arc was added to drawing.");
}
}
else
{
MessageBox.Show("There are no open documents in DraftSight.");
}
}
}</pre>
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