C# autocad 删除块的blocktablerecord（基于名称）

在C#中，删除AutoCAD块的BlockTableRecord通常是通过Autodesk.AutoCAD.DatabaseServices命名空间下的API来操作的。特别是利用`Database`类的`GetBlockRecordByBlockName()`方法找到指定名称的块记录，然后使用`DeleteObject()`方法删除它。这里是一个简化的示例：

using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;

// 获取活动数据库
AcDbDatabase db = Application.DocumentManager.MdiActiveDocument.Database;

// 定义要删除的块名
string blockName = "YourBlockName";

// 根据块名查找BlockTableRecord
AcDbBlockTableRecord blockRec = db.BlockTable.GetBlockRecord(blockName);

if (blockRec != null)
{
    // 如果找到了块记录，则尝试删除
    try
    {
        blockRec.Delete();
        Console.WriteLine($"Block '{blockName}' has been successfully deleted.");
    }
    catch ( AcadException ex )
    {
        Console.WriteLine($"Error deleting block '{blockName}'. Reason: {ex.Message}");
    }
}
else
{
    Console.WriteLine($"Block '{blockName}' not found.");
}