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Add and Mate Component Example (C#)

This example shows how to add a component to an assembly and mate it.

// Preconditions:
// 1. Open install_dir\samples\tutorial\toolbox\lens_mount.sldasm.
// 2. Open an Immediate window.
// Postconditions:
// 1. Adds the specified component, camtest.sldprt, to the assembly.
// 2. Fires the AddItemNotify event.
// 3. Makes the specified component virtual by saving it to the
//    assembly with a new name.
// 4. Fires the RenameItemNotify event.
// 5. Adds a mate between the selected planes to the assembly.
// 6. Inspect the Immediate window.
// NOTE: Because the models are used elsewhere, do not save changes to them.

using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System.Runtime.InteropServices;
using System;
using System.Diagnostics;
using System.Collections;
using System.Windows.Forms;
namespace MakeVirtualCSharp.csproj
    partial class SolidWorksMacro
        public AssemblyDoc swAssemblyDoc;
        ModelDoc2 swModel;
        ModelDocExtension swDocExt;
        Hashtable openAssem;
        string tmpPath;
        ModelDoc2 tmpObj;
        bool boolstat;
        bool stat;
        Component2 swComponent;
        Feature matefeature;
        string MateName;
        string FirstSelection;
        string SecondSelection;
        string strCompName;
        string AssemblyTitle;
        string AssemblyName;
        int errors;
        int warnings;
        int mateError;
        public void Main()
            swModel = (ModelDoc2)swApp.ActiveDoc;
            // Set up event
            swAssemblyDoc = (AssemblyDoc)swModel;
            openAssem = new Hashtable();
            // Get title of assembly document
            AssemblyTitle = swModel.GetTitle();
            // Split the title into two strings using the period as the delimiter
            string[] strings = AssemblyTitle.Split(new Char[] { '.' });
            // Use AssemblyName when mating the component with the assembly
            AssemblyName = (string)strings[0];
            Debug.Print("Name of assembly: " + AssemblyName);
            boolstat = true;
            string strCompModelname = null;
            strCompModelname = "camtest.sldprt";
            // Because the component resides in the same folder as the assembly, get
            // the assembly's path and use it when opening the component
            tmpPath = swModel.GetPathName();
            int idx;
            idx = tmpPath.LastIndexOf("lens_mount.sldasm");
            string compPath;
            tmpPath = tmpPath.Substring(0, (idx));
            compPath = string.Concat(tmpPath, strCompModelname);
            // Open the component
            tmpObj = (ModelDoc2)swApp.OpenDoc6(compPath, (int)swDocumentTypes_e.swDocPART, (int)swOpenDocOptions_e.swOpenDocOptions_Silent, ""ref errors, ref warnings);
            // Check to see if the file is read-only or cannot be found; display error
            // messages if either
            if (warnings == (int)swFileLoadWarning_e.swFileLoadWarning_ReadOnly)
                MessageBox.Show("This file is read only.");
                boolstat = false;
            if (tmpObj == null)
                MessageBox.Show("Cannot locate the file.");
                boolstat = false;
            // Activate the assembly so that you can add the component to it
            swModel = (ModelDoc2)swApp.ActivateDoc3(AssemblyTitle, true, (int)swRebuildOnActivation_e.swUserDecision, ref errors);
            // Add the camtest part to the assembly document
            swComponent = (Component2)swAssemblyDoc.AddComponent5(strCompModelname, (int)swAddComponentConfigOptions_e.swAddComponentConfigOptions_CurrentSelectedConfig, ""false"", -1, -1, -1);
            // Make the component virtual
            stat = swComponent.MakeVirtual();
            // Get the name of the component for the mate
            strCompName = swComponent.Name2;
            // Create the name of the mate and the names of the planes to use for the mate
            MateName = "top_coinc_" + strCompName;
            FirstSelection = "Top@" + strCompName + "@" + AssemblyName;
            SecondSelection = "Front@" + AssemblyName;
            swDocExt = (ModelDocExtension)swModel.Extension;
            // Select the planes for the mate
            boolstat = swDocExt.SelectByID2(FirstSelection, "PLANE", 0, 0, 0, true, 1, null, (int)swSelectOption_e.swSelectOptionDefault);
            boolstat = swDocExt.SelectByID2(SecondSelection, "PLANE", 0, 0, 0, true, 1, null, (int)swSelectOption_e.swSelectOptionDefault);
            // Add the mate
            matefeature = (Feature)swAssemblyDoc.AddMate5((int)swMateType_e.swMateCOINCIDENT, (int)swMateAlign_e.swMateAlignALIGNED, false, 0, 0, 0, 0, 0, 0, 0, 0, falsefalse, 0, out mateError);
            matefeature.Name = MateName;
            Debug.Print("Mate added: " + matefeature.Name);
        public void AttachEventHandlers()
        public void AttachSWEvents()
            swAssemblyDoc.AddItemNotify += this.swAssemblyDoc_AddItemNotify;
            swAssemblyDoc.RenameItemNotify += this.swAssemblyDoc_RenameItemNotify;
        private int swAssemblyDoc_AddItemNotify(int EntityType, string itemName)
            Debug.Print("Component added: " + itemName);
            return 1;
        private int swAssemblyDoc_RenameItemNotify(int EntityType, string oldName, string NewName)
            Debug.Print("Virtual component name: " + NewName);
            return 1;
        public SldWorks swApp;

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