如何通过选择集只获取一个acadobject

问题描述

我在选择目标 acadObject 时遇到了一些麻烦.我通过 selectionset.SelectonScreen 方法获得输入.

I have some trouble to select the targeted acadObject. I get the input via selectionset.SelectonScreen method.

在这里，我可以根据我的过滤条件从模型空间中获取更多数量的对象.但我只需要用户提供一个对象.

Here i can get more number of object from modelspace based on my filter condition.But i need only one object from the user.

这里我在下面提到了我的代码:

Here i mentioned my code below:

AcadSelectionSet selset= null;
selset=currDoc.selectionset.add("Selset");
short[] ftype=new short[1];
object[] fdata=new object[1];
ftype[0]=2;//for select the blockreference
fdata[0]=blkname;
selset.selectOnScreen ftype,fdata;  // Here i can select any no. of blocks according to filter value but i need only one block reference.

请帮我解决这个问题.

推荐答案

这是来自 autocad 开发人员帮助的直接引用

this is a direct quote from autocad developer help

http://docs.autodesk.com/ACD/2013/ENU/index.html?url=files/GUID-CBECEDCF-3B4E-4DF3-99A0-47103D10DADD.htm,topicNumber=d30e724932

AutoCAD .NET API 有大量文档.

There is tons of documentation the AutoCAD .NET API.

你需要有

[程序集:CommandClass(typeof(namespace.class))]

如果您希望能够在NetLoad .dll(如果它是一个类库)之后从命令行调用此命令，请在您的命名空间之上.

above your namespace if you want to be able to invoke this command from the command line after you NetLoad the .dll, if it is a classLibrary.

using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;

[CommandMethod("SelectObjectsOnscreen")]
public static void SelectObjectsOnscreen()
{
  // Get the current document and database
  Document acDoc = Application.DocumentManager.MdiActiveDocument;
  Database acCurDb = acDoc.Database;

  // Start a transaction
  using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
  {
      // Request for objects to be selected in the drawing area
      PromptSelectionResult acSSPrompt = acDoc.Editor.GetSelection();

      // If the prompt status is OK, objects were selected
      if (acSSPrompt.Status == PromptStatus.OK)
      {
          SelectionSet acSSet = acSSPrompt.Value;

          // Step through the objects in the selection set
          foreach (SelectedObject acSSObj in acSSet)
          {
              // Check to make sure a valid SelectedObject object was returned
              if (acSSObj != null)
              {
                  // Open the selected object for write
                  Entity acEnt = acTrans.GetObject(acSSObj.ObjectId,
                                                   OpenMode.ForWrite) as Entity;

                  if (acEnt != null)
                  {
                      // Change the object's color to Green
                      acEnt.ColorIndex = 3;
                  }
              }
          }

          // Save the new object to the database
          acTrans.Commit();
      }

      // Dispose of the transaction
  }
}

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