Solidworks的工程图中图块的使用也比较频繁。本文将给大家介绍Solidworks中与块有关的类SketchBlockDefinition及SketchBlockInstance。从字面上理解可以看出，与块定义有关的功能与SketchBlockDefinition相关。相同的块，可以被插入到工程图文档中的各张图中，则每张图中的块即为一个块的实例。
image.png
实例1：创建块
在打开的工程图中，任意绘制块所需的草图，注释，并将其全部选中，运行如下程序，即可自动将选中的元素做成块。
public static void CreateBlock(SldWorks SwApp, ModelDoc2 SwDoc, string BlockPath)
{
SketchManager SwSktManager = SwDoc.SketchManager;
MathUtility swMathUtility = SwApp.GetMathUtility();
double[] xyz = new double[] { 0,0, 0 };//插入点
MathPoint swMathPoint = swMathUtility.CreatePoint(xyz);
SketchBlockDefinition SwBlockDefinition = SwSktManager.MakeSketchBlockFromSelected(swMathPoint);//将选中的元素做成块
if (SwBlockDefinition != null)
{
SwBlockDefinition.Save(BlockPath);
}
else
{
MessageBox.Show("建块失败，请先选择需要做块的元素");
}
}
运行效果:
image.png
实例2：插入图块
本例中将在工程图中插入同一个图块，可以切换不同的图纸，重复运行，实现插入多个图块实例。
public static void InsertBlock(SldWorks SwApp, ModelDoc2 SwDoc,string BlockPath)
{
string BlockName = BlockPath.Substring(BlockPath.LastIndexOf(@"\")+1, BlockPath.LastIndexOf(".")- BlockPath.LastIndexOf(@"\") - 1);
Feature SwFeat = ((DrawingDoc)SwDoc).FeatureByName(BlockName);
SketchManager SwSktManager = SwDoc.SketchManager;
MathUtility swMathUtility = SwApp.GetMathUtility();
double[] xyz = new double[] { 1, 2, 3 };
MathPoint swMathPoint = swMathUtility.CreatePoint(xyz);
#region 全新插入
if (SwFeat == null)
{
SketchBlockDefinition SwBlockDefinition = SwSktManager.MakeSketchBlockFromFile(swMathPoint, BlockPath, false, 1, 0);
}
#endregion
#region 非全新插入--只要特征树又特征，就是非全新
else
{
SketchBlockDefinition SwBlockDefinition = SwFeat.GetSpecificFeature2();
SketchBlockInstance SwBlockIns = SwSktManager.InsertSketchBlockInstance(SwBlockDefinition, swMathPoint, 1, 0);
SwBlockIns.Name = "ABC"+ (SwBlockDefinition.GetInstanceCount()+1).ToString().Trim();
((FeatureManager)SwDoc.FeatureManager).UpdateFeatureTree();
}
#endregion
//一个块定义的所有实例是联动修改的
}
运行效果
每个图块都是块定义ABC的一个实例
image.png
实例3：获取工程图块信息
遍历工程图中图块的信息
public static void GetBlockIns(ModelDoc2 SwDoc)
{
SketchManager SwSktManager = SwDoc.SketchManager;
object[] ObjBlockDefs = SwSktManager.GetSketchBlockDefinitions();
StringBuilder Sb = new StringBuilder("块定义数量:" + ObjBlockDefs.Length.ToString().Trim() + "\r\n");
foreach (object ObjBlockDef in ObjBlockDefs)
{
SketchBlockDefinition SwBlockDef = (SketchBlockDefinition)ObjBlockDef;
Sb.Append("块特征:"+SwBlockDef.GetFeature().Name+"\r\n");
Sb.Append("引用路径:" + SwBlockDef.FileName+ "\r\n");
Sb.Append("引用数量:" + SwBlockDef.GetInstanceCount().ToString().Trim() + "\r\n");
if (SwBlockDef.GetInstanceCount() > 0)
{
Sb.Append("具体实例:\r\n");
object[] ObjInses = SwBlockDef.GetInstances();
foreach (object ObjIns in ObjInses)
{
SketchBlockInstance SwBlockIns = (SketchBlockInstance)ObjIns;
Sb.Append("实例名:" + SwBlockIns.Name + "\r\n");
}
}
Sb.Append("********************************\r\n");
}
System.Windows.Forms.MessageBox.Show(Sb.ToString().Trim());
}
运行效果：
image.png
