highlight a selection programmatically

Jun 3, 2012

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With COM API, you could setup an InwOpSelection and add the paths which is the result of the find. And call State.CurrentSelection = your InwOpSelection. While in .NET API, current selection is exposed as a document part CurrentSelection. The highlighting objects is to change the selected items of CurrentSelection.

The code below shows the ways to highlight in COM and .NET.

using Autodesk.Navisworks.Api;    using ComApi = Autodesk.Navisworks.Api.Interop.ComApi;    using ComApiBridge = Autodesk.Navisworks.Api.ComApi;

// highlight objects    private void highlight()    {        Document oDoc =            Autodesk.Navisworks.Api.Application.ActiveDocument;             // assume we get two model items        ModelItem oItem1 =             oDoc.Models[0].RootItem.DescendantsAndSelf.            ElementAt(1);        ModelItem oItem2 =              oDoc.Models[0].RootItem.DescendantsAndSelf.            ElementAt(2);             // create ModelItemCollection        ModelItemCollection oSel_Net =            new ModelItemCollection();        oSel_Net.Add(oItem1);        oSel_Net.Add(oItem2);              // highlight by .NET API        oDoc.CurrentSelection.SelectedItems.CopyFrom(oSel_Net);             //highlight by COM API        ComApi.InwOpState10 state =            ComApiBridge.ComApiBridge.State;        ComApi.InwOpSelection comSelectionOut =             ComApiBridge.ComApiBridge.ToInwOpSelection(oSel_Net);             state.CurrentSelection = comSelectionOut;         }

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One response to “highlight a selection programmatically”

david

August 31, 2013

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Autodesk.Navisworks.Api;
namespace WebApplication2
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Document oActiveDoc = Autodesk.Navisworks.Api.Application.ActiveDocument;
try
{
oActiveDoc.OpenFile(@”D:\test.nwd”);
}
catch (Autodesk.Navisworks.Api.DocumentFileException)
{
if (!oActiveDoc.TryOpenFile(@”D:\test.nwd”))
{
Response.Write(“Failed to open the file”);
}
}
}
}
}
提示如下错误
未将对象引用设置到对象的实例。
说明: 执行当前 Web 请求期间，出现未经处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。
异常详细信息: System.NullReferenceException: 未将对象引用设置到对象的实例。
源错误:
行 19: try
行 20: {
行 21: oActiveDoc.Clear();
行 22: oActiveDoc.OpenFile(@”D:\test_2012版本.nwd”);
行 23: }
源文件: K:\ToQiGang\WebApplication2\WebApplication2\WebForm1.aspx.cs 行: 21
堆栈跟踪:
[NullReferenceException: 未将对象引用设置到对象的实例。]
WebApplication2.WebForm1.Page_Load(Object sender, EventArgs e) in K:\ToQiGang\WebApplication2\WebApplication2\WebForm1.aspx.cs:21
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
System.Web.UI.Control.OnLoad(EventArgs e) +92
System.Web.UI.Control.LoadRecursive() +54
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +772

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