vs2015对revit2018二次开发之helloworld详解编程语言

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
 
using Autodesk.Revit.DB; 
using Autodesk.Revit.UI; 
using Autodesk.Revit.Attributes; 
 
namespace HelloWorld 
{ 
    [Transaction(TransactionMode.Manual)] 
    public class Test:IExternalCommand 
    { 
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements) 
        { 
            try 
            { 
                TaskDialog.Show("Hello", "First Revit Program."); 
            } 
            catch (Exception e) 
            { 
                message = e.Message; 
                return Result.Failed; 
            } 
            return Result.Succeeded; 
        } 
    } 
}

<?xml version="1.0" encoding="utf-8"?> 
<RevitAddIns> 
    <AddIn Type="Command"> 
    <VendorId>abc</VendorId> 
    <Text>Hello Workd</Text> 
    <Description>This is Hello World for revit.</Description> 
    <FullClassName>HelloWorld.Test</FullClassName> 
    <Assembly>E:/C/revit/HelloWorld/HelloWorld/bin/Debug/helloworld.dll</Assembly> 
    <AddInId>6869D1FB-8A0D-4738-958D-1596E99A8244</AddInId> 
    </AddIn> 
</RevitAddIns>