梦想CAD控件图块COM接口知识点
梦想CAD控件图块COM接口知识点图块是将多个实体组合成一个整体，并给这个整体命名保存，在以后的图形编辑中图块就被视为一个实体。一个图块包括可见的实体如线、圆、圆弧以及可见或不可见的属性数据。图块的运用可以帮助用户更好的组织工作，快速创建与修改图形，减少图形文件的大小。一、定义图块c#将选中的实体做成块实现代码：MxDrawSelectionSet ss = new MxDrawSelectionSet();ss.Select(MCAD_McSelect.mcSelectionSetUserSelect, null, null, null);List<Int64> aryId = new List<Int64>();for (Int32 i = 0; i < ss.Count; i++){MxDrawEntity ent = ss.Item(i);if (ent != null){aryId.Add(ent.ObjectID);ent.Close();} }MxDrawDatabase curDatabase = (MxDrawDatabase)(mxdraw.GetDatabase()); double dMinX = 0, dMinY = 0, dMaxX = 0, dMaxY = 0;bool isFirstEnt = true;for (int l = 0; l < aryId.Count; l++){MxDrawMcDbObject pObj = curDatabase.ObjectIdToObject(aryId);if (pObj == null)continue;MxDrawPoint pt1Ob, pt2Ob; MxDrawEntity pEnt = (MxDrawEntity)pObj; if (pEnt == null) continue; pEnt.GetBoundingBox(out pt1Ob, out pt2Ob); MxDrawPoint minPt = (MxDrawPoint)pt1Ob; MxDrawPoint maxPt = (MxDrawPoint)pt2Ob; if (minPt != null && maxPt != null) { if(isFirstEnt) { dMinX = minPt.x; dMinY = minPt.y; dMaxX = maxPt.x; dMaxY = maxPt.y; isFirstEnt = false; } Else{ if (dMinX > minPt.x) dMinX = minPt.x; if (dMinY > minPt.y) dMinY = minPt.y; if (dMaxX < maxPt.x) dMaxX = maxPt.x; if (dMaxY < maxPt.y) dMaxY = maxPt.y; } } } if(isFirstEnt) { // 没有实体 return 0; } MxDrawPoint pos = new MxDrawPoint(); pos.x = dMinX + (dMaxX - dMinX) / 2.0; pos.y = dMinY + (dMaxY - dMinY) / 2.0; // 检查新创建的块名，在当前数据库是否已经存在. MxDrawBlockTable blkTable = curDatabase.GetBlockTable(); MxDrawBlockTableRecord curSpace = curDatabase.CurrentSpace(); String sNewBlakName; MxDrawBlockTableRecord blkNewRec = blkTable.Add(""); sNewBlakName = blkNewRec.Name; blkNewRec.Origin = pos; for (int l = 0; l < aryId.Count; l++) { blkNewRec.AddCloneEntity(aryId);// 把以前实体删除 。 MxDrawMcDbObject pObj = curDatabase.ObjectIdToObject(aryId); if (pObj == null) continue; pObj.Erase(); } if (blkNewRec != null) { MxDrawBlockReference blkRef = curSpace.InsertBlock(pos.x,pos.y, sNewBlakName, 1.0, 0.0); MxDrawAttribute attrib = blkRef.AppendAttribute(); attrib.Position = pos; attrib.AlignmentPoint = pos; attrib.Oblique = 0.0; attrib.Rotation = 0.0; attrib.Height = 2.0; attrib.TrueColor.SetRGB(255,0,0); // attrib.TextString = "这是一个属性文字的测试"; attrib.Tag = "TestTag"; attrib.IsInvisible = false; blkRef.Position = blkRef.Position; return blkRef.ObjectID; } return 0;
js将选中的实体做成块实现代码：
//实例化一个构造选择集进行过滤,该类封装了选择集及其处理函数。var ss = mxOcx.NewSelectionSet();//构造一个过滤链表var spFilte = mxOcx.NewResbuf();//用户选择对象得到用户选取的实体ss.Select2(8, null, null, null, spFilte); var aryId = new Array();for (var i = 0; i < ss.Count; i++){ var ent = ss.Item(i); if (ent != null) { aryId.push(ent.ObjectID); ent.Close(); }}//返回控件的数据库对象var curDatabase =mxOcx.GetDatabase();var dMinX = 0, dMinY = 0, dMaxX = 0,dMaxY = 0;var isFirstEnt = true;for (var l = 0; l < aryId.length; l++){ var pObj =curDatabase.ObjectIdToObject(aryId); if (pObj == null) continue; var pEnt = pObj; if (pEnt == null) continue; varpoints = pEnt.GetBoundingBox2(); var minPt = points.Item(0); var maxPt = points.Item(1); if (minPt != null && maxPt != null) { if(isFirstEnt) { dMinX = minPt.x; dMinY = minPt.y; dMaxX = maxPt.x; dMaxY = maxPt.y; isFirstEnt = false; } else { if (dMinX > minPt.x) dMinX = minPt.x; if (dMinY > minPt.y) dMinY = minPt.y; if (dMaxX < maxPt.x) dMaxX = maxPt.x; if (dMaxY < maxPt.y) dMaxY = maxPt.y; } }} if(isFirstEnt){ // 没有实体 return;}var pos = mxOcx.NewPoint();pos.x = dMinX + (dMaxX - dMinX) / 2.0;pos.y = dMinY + (dMaxY - dMinY) / 2.0; // 检查新创建的块名，在当前数据库是否已经存在.var blkTable =curDatabase.GetBlockTable();var curSpace =curDatabase.CurrentSpace();var sNewBlakName;var blkNewRec = blkTable.Add("");sNewBlakName = blkNewRec.Name;blkNewRec.Origin = pos;for (var l = 0; l < aryId.length; l++){ blkNewRec.AddCloneEntity(aryId); // 把以前实体删除 。 var pObj =curDatabase.ObjectIdToObject(aryId); if (pObj == null) continue; pObj.Erase();}if (blkNewRec != null){ var blkRef =curSpace.InsertBlock(pos.x,pos.y, sNewBlakName, 1.0, 0.0); var attrib = blkRef.AppendAttribute(); attrib.Position = pos; attrib.AlignmentPoint = pos; attrib.Oblique = 0.0; attrib.Rotation = 0.0; attrib.Height = 2.0; attrib.Tag = "TestTag"; attrib.IsInvisible = false; blkRef.Position = blkRef.Position;}return;
二、绘制块引用对象主要用到函数说明：_DMxDrawX::DrawBlockReference绘制块引用对象。详细说明如下：
参数 说明
DOUBLE dPosX插入点的X坐标
DOUBLE dPosY插入点的Y坐标
BSTR pszBlkName图块名
DOUBLE dScale图块缩放比例
DOUBLE dAng图块的旋转角度
C#中实现代码说明：
private void DynInsert(){ //把颜色改回黑白色 axMxDrawX1.DrawCADColorIndex = 0; //创建一个图层,名为"BlockLayer" axMxDrawX1.AddLayer("BlockLayer"); //设置当前图层为"BlockLayer" axMxDrawX1.LayerName = "BlockLayer"; var sBlkName = "Tree"; //用户需要出入图块的路径 控件程序在磁盘的文件路径 var sBlkFile = axMxDrawX1.GetOcxAppPath() + "\\Blk\\树.dwg"; //向控件数据库中插入一个图块,不用它插入匿名块 axMxDrawX1.InsertBlock(sBlkFile, "Tree"); //绘制块引用对象 //参数一为插入点的X坐标；参数二为插入点的Y坐标； //参数三为图块名；参数四为图块缩放比例；参数五为图块的旋转角度 axMxDrawX1.DrawBlockReference(0, 3600, "Tree", 1, 0); axMxDrawX1.ZoomAll(); axMxDrawX1.UpdateDisplay();}
js中实现代码说明：
function DynInsert() { mxOcx.DrawColor = 0; //创建一个图层,名为"BlockLayer" mxOcx.AddLayer ("BlockLayer"); //设置当前图层为"BlockLayer" mxOcx.LayerName = "BlockLayer"; var sBlkName = "Tree"; //用户需要出入图块的路径 控件程序在磁盘的文件路径 var sBlkFile = mxOcx.GetOcxAppPath() + "\\Blk\\树.dwg"; //向控件数据库中插入一个图块,不用它插入匿名块 mxOcx.InsertBlock(sBlkFile, "Tree"); //绘制块引用对象 //参数一为插入点的X坐标；参数二为插入点的Y坐标； //参数三为图块名；参数四为图块缩放比例；参数五为图块的旋转角度 mxOcx.DrawBlockReference(0, 3600, "Tree", 1, 0) ; mxOcx.ZoomAll(); mxOcx.UpdateDisplay();}
三、动态绘制块主要用到函数说明：_DMxDrawX::DrawBlockReference绘制块引用对象。详细说明如下：
参数 说明
DOUBLE dPosX插入点的X坐标
DOUBLE dPosY插入点的Y坐标
BSTR pszBlkName图块名
DOUBLE dScale图块缩放比例
DOUBLE dAng图块的旋转角度
js中实现代码说明：动态拖放时的绘制事件：
function DoDynWorldDrawFun(dX,dY,pWorldDraw,pData){ var sGuid = pData.Guid; mxOcx.SetEventRet(0); if(sGuid == "TestDynDraw") { //动态插入图块 // 与用户交互到在图上提取一个点 var firstPt =pData.GetPoint("pt1"); if(firstPt == null) return; //与用户交互，从命令中取字符串 var sBlkName =pData.GetString("BlkName"); var secondPt = mxOcx.NewPoint(); secondPt.x = dX; secondPt.y = dY; //计算this点减去pPoint，得到的向量 var vec = firstPt.SumVector(secondPt); //返回向量顺时针转到与X轴的角度. var dAng = vec.Angle(); //绘制块引用对象 //参数一为插入点的X坐标；参数二为插入点的Y坐标； //参数三为图块名；参数四为图块缩放比例；参数五为图块的旋转角度 pWorldDraw.DrawBlockReference(firstPt.x,firstPt.y,sBlkName,1.0,dAng * 180.0 / 3.14159265 + 90.0); //设置自定义事件的返回值 mxOcx.SetEventRet(1); } else if (sGuid == "TestDynDraw1") { var sBlkName = pData.GetString("BlkName"); //绘制块引用对象 pWorldDraw.DrawBlockReference(dX, dY, sBlkName, 1.0, 0.0); }}
动态插入图块：
function DynInsert() { var sBlkName = "Tree"; //用户需要出入图块的路径 控件程序在磁盘的文件路径 var sBlkFile = mxOcx.GetOcxAppPath() + "\\Blk\\树.dwg"; //向控件数据库中插入一个图块,不用它插入匿名块 mxOcx.InsertBlock(sBlkFile, "Tree"); //新建一个COM组件对象 var getPt = mxOcx.NewComObject("IMxDrawUiPrPoint"); getPt.message = "点取插入点"; //初始动态绘制 var spDrawData1 = getPt.InitUserDraw("TestDynDraw1"); //设置string类型的属性 spDrawData1.SetString("BlkName","Tree"); if (getPt.go() != 1) { return; } var frstPt = getPt.value(); if (frstPt == null) { return; } var getSecondPt = mxOcx.NewComObject("IMxDrawUiPrPoint"); var spDrawData = getSecondPt.InitUserDraw("TestDynDraw"); getSecondPt.message = "点取旋转角度"; //得到点时的拖放基点 getSecondPt.basePoint = frstPt; //设置是否启用拖放基点 true：使用，false：不使用 getSecondPt.setUseBasePt(true); //设置point类型的属性 spDrawData.SetPoint("pt1", frstPt); //设置string类型的属性 spDrawData.SetString("BlkName", "Tree"); if (getSecondPt.go() != 1) { return; } //把实体绘制到图上。一般用于动态拖放时，在拖放结束时，绘制到图上 var ret = spDrawData.Draw(); // 给属性块写文字. var blkRef = ret.AtObject(0); if (blkRef != null) { var param = mxOcx.NewResbuf(); blkRef.SetProp("createAttribute",param); }}
四、修复块中心点主要用到函数说明：IMxDrawEntity::GetBoundingBox返回实体的最小矩形框外包。详细说明如下：
参数 说明
IMxDrawPoint** minPoint外包框的左下角点
IMxDrawPoint**maxPoint外包框的右上角点
c#中实现代码说明：
MxDrawDatabase databae = (MxDrawDatabase)axMxDrawX1.GetDatabase(); MxDrawBlockTable blkTab = databae.GetBlockTable(); MxDrawBlockTableIterator mBlockTableiter = blkTab.NewIterator(); for (; !mBlockTableiter.Done(); mBlockTableiter.Step()) { MxDrawBlockTableRecord blkRec = mBlockTableiter.GetRecord(); MxDrawBlockTableRecordIterator mBlockTableReciter = blkRec.NewIterator(); MxDrawPoint mMaxPt = new MxDrawPoint(); MxDrawPoint mMinPt = new MxDrawPoint(); MxDrawPoint mMaxPtTemp = new MxDrawPoint(); MxDrawPoint mMinPtTemp = new MxDrawPoint(); for (; !mBlockTableReciter.Done(); mBlockTableReciter.Step(true, false)) { MxDrawEntity ent = mBlockTableReciter.GetEntity(); ent.GetBoundingBox(out mMinPtTemp, out mMaxPtTemp); if ((mMinPtTemp == null) || (mMaxPtTemp == null)) break; mMaxPt.x = Math.Max(mMaxPt.x, mMaxPtTemp.x); mMaxPt.y = Math.Max(mMaxPt.y, mMaxPtTemp.y); mMinPt.x = Math.Min(mMinPt.x, mMinPtTemp.x); mMinPt.y = Math.Min(mMinPt.y, mMinPtTemp.y); } if ((mMinPtTemp == null) || (mMaxPtTemp == null)) continue; MxDrawPoint mNewBasePt = new MxDrawPoint(); mNewBasePt.x = mMinPt.x + (mMaxPt.x - mMinPt.x) / 2; mNewBasePt.y = mMinPt.y + (mMaxPt.y - mMinPt.y) / 2; blkRec.Origin = mNewBasePt; axMxDrawX1.Regen(); }
js中实现代码说明：
//返回控件的数据库对象 var databae = mxOcx.GetDatabase(); //返回数据库中的块表对象 var blkTab = databae.GetBlockTable(); //创建一个遍历块表中所有记录的遍历器 var mBlockTableiter = blkTab.NewIterator(); //移动当前遍历器位置 for (; !mBlockTableiter.Done(); mBlockTableiter.Step()) { //返回遍历器当前位置的记录 var blkRec = mBlockTableiter.GetRecord(); //创建一个遍历块表中所有记录的遍历器 var mBlockTableReciter = blkRec.NewIterator(); var mMaxPt = mxOcx.NewPoint(); var mMinPt = mxOcx.NewPoint(); var mMaxPtTemp = mxOcx.NewPoint(); var mMinPtTemp =mxOcx.NewPoint(); //移动当前遍历器位置 for (; !mBlockTableReciter.Done(); mBlockTableReciter.Step(true, false)) { //与用户交互在图面上选择一个实体 var ent = mBlockTableReciter.GetEntity(); //返回实体的最小矩形框外包 ent.GetBoundingBox(mMinPtTemp, mMaxPtTemp); if ((mMinPtTemp == null) || (mMaxPtTemp == null)) break; mMaxPt.x = Math.max(mMaxPt.x, mMaxPtTemp.x); mMaxPt.y = Math.max(mMaxPt.y, mMaxPtTemp.y); mMinPt.x = Math.min(mMinPt.x, mMinPtTemp.x); mMinPt.y = Math.min(mMinPt.y, mMinPtTemp.y); } if ((mMinPtTemp == null) || (mMaxPtTemp == null)) continue; var mNewBasePt = mxOcx.NewPoint(); mNewBasePt.x = mMinPt.x + (mMaxPt.x - mMinPt.x) / 2; mNewBasePt.y = mMinPt.y + (mMaxPt.y - mMinPt.y) / 2; //块表记录的插入原点属性 blkRec.Origin = mNewBasePt; //重新生成图，重新生成所有显示数据 mxOcx.Regen(); } }
五、打碎块主要用到函数说明：IMxDrawBlockReference::Explode打碎块引用,被打碎的引用对象还在，打碎的实体是新生成的。详细说明如下：
参数 说明
IMxDrawResbuf** newIds返回打碎后新生成的实体id数组
c#中实现代码说明：
// 与用户交在图面上选择要打碎的块引对象MxDrawUtility mxUtility = new MxDrawUtility();object getPt;MxDrawEntity ent = mxUtility.GetEntity(out getPt,"n 选择图块:"); if (ent == null){MessageBox.Show("没有选择实体.."); return;} if (ent is MxDrawBlockReference){ MxDrawBlockReference blkRef = (MxDrawBlockReference)ent; MxDrawResbuf rb = (MxDrawResbuf)(blkRef.Explode() ); // 得到打碎后新生成的实体的id for(Int32i = 1; i < rb.Count;i++) { long entId = rb.AtLong(i); } }
js中实现代码说明：
// 与用户交在图面上选择要打碎的块引对象var ent = mxOcx.GetEntity("选择图块:"); if (ent == null) { alert("没有选择实体.."); return; }if (ent.ObjectName == "McDbBlockReference") { // 选择的是一个块对象，就调用打碎函数碎 var blkRef = ent; var rb = blkRef.Explode(); // 得到打碎后新生成的实体的id for(vari = 1; i < rb.Count;i++) { var entId = rb.AtLong(i); } }
六、改变块的颜色颜色实体的颜色可以通过0~256的数字值来指定和读取，也可以通过 McCmColor 类的实例来指定和读取，McCmColor类可以用来扩展颜色模型。McCmColor类可以用来表示真彩色中的任何一种色彩。颜色值1~7代表的标准颜色如下：
颜色值1234567
颜色红黄绿青蓝紫红白或黑
颜色值7对应的颜色与控件背景颜色有关。如果背景是黑，则7对应的颜色是白，反之则对应的颜色是黑。js中使用如下：
function changecolor1() { var database = mxOcx.GetDatabase(); var blkTab = database.GetBlockTable(); var iter = blkTab.NewIterator(); for (; !iter.Done(); iter.Step(true, false)) { var blkRec = iter.GetRecord(); var iter1 = blkRec.NewIterator(); for (; !iter1.Done(); iter1.Step()) { var tmpEnt = iter1.GetEntity(); tmpEnt.colorIndex = 1; } }}
七、读取属性块c#中使用如下：
MxDrawUtility mxUtility = new MxDrawUtility(); MxDrawPoint getPt; MxDrawEntity ent = mxUtility.GetEntity(out getPt, "\n 选择块引用实体:"); if (ent == null) { return; } if (ent is MxDrawBlockReference) { MxDrawBlockReference blkRef = (MxDrawBlockReference)ent; // 读取块名。 mxUtility.Prompt("\n Name" +blkRef.GetBlockName()); for (int j = 0; j < blkRef.AttributeCount; j++) { MxDrawAttribute attrib = blkRef.AttributeItem(j); mxUtility.Prompt("\n Tag: " + attrib.Tag + "Text:" + attrib.TextString); } // 从块记录中，得到提示文字. MxDrawBlockTableRecord blkRec = blkRef.BlockTableRecord; MxDrawBlockTableRecordIterator iter = blkRec.NewIterator(); for (; !iter.Done(); iter.Step(true, false)) { MxDrawEntity tmpEnt = iter.GetEntity(); if (tmpEnt is MxDrawAttributeDefinition) { MxDrawAttributeDefinition attribDef = (MxDrawAttributeDefinition)(tmpEnt); mxUtility.Prompt("\n Tag: " + attribDef.Tag + " Tip:" + attribDef.Prompt); } } } else { MessageBox.Show("选择块引用实体"); }
js中使用如下：
function FindBlockAttrib(){ var winWidth = 440; var winHeight = 140; var winLeft = (screen.width - winWidth) / 2; var winTop = (screen.height - winHeight) / 2 - 20; var str = 'dialogHeight:' + winHeight + 'px;dialogWidth:' + winWidth + 'px;dialogTop:' + winTop + 'px;dialogLeft:' + winLeft + 'px;resizable:yes;center:yes;status:no;' var rt = window.showModalDialog("Gettext.htm?tmp=" + Math.random(), "输入属性文字", str); var txt; if (typeof (rt) == "undefined") { return; } else { var arr = rt.split(","); txt = arr; } var ss = mxOcx.NewSelectionSet(); var spFilte = mxOcx.NewResbuf(); // 把块对象，当着过滤条件. spFilte.AddStringEx("INSERT", 5020); // 得到图上，所有块对象. ss.Select2(5, null, null, null, spFilte); // 遍历每个块. for (var i = 0; i < ss.Count; i++) { var ent = ss.Item(i); if (ent == null) continue; if (ent.ObjectName == "McDbBlockReference") { var blkref = ent; var j = 0; for (; j < blkref.AttributeCount; j++) { var attrib = blkref.AttributeItem(j); if (attrib.TextString == txt) { // 找到块属性。 mxOcx.PutEntityInView(ent.ObjectID, 300); var dLen = mxOcx.ViewLongToDocCoord(80); // 绘制一个标记圆. mxOcx.DrawVectorCircle(ent.Position.x, ent.Position.y, dLen, 65280); return; } } } ent = null; } alert("没有找到块属性文字"); // 在这里必须显示释放控件的COM对象指针. ss = null; spFilte = null; CollectGarbage();}
八、修改属性块js中使用如下：
function ModifyBlockAttrib() { var ent = mxOcx.GetEntity("选择图面的属性块:"); if(ent == null) { return; } if (ent.ObjectName != "McDbBlockReference") { alert("选择的对象不是块引用"); } var blkref = ent; if(blkref.AttributeCount == 0) alert("图块没有属性"); //遍历所有属性，修改属性值 var i = 0; for (; i < blkref.AttributeCount; i++) { var attrib = blkref.AttributeItem(i); attrib.TextString += "<被修改>" } // 通知块引，它的属性被修改，用于更新显示. blkref.AssertWriteEnabled();}
九、得到所有图块名js中使用如下：
var database = mxOcx.GetDatabase();var blkTab = database.GetBlockTable();var iter = blkTab.NewIterator();for (; !iter.Done(); iter.Step()){ var blkRec = iter.GetRecord(); alert(blkRec.Name);}
十、将图块替换成dwg文件js中使用如下：
var ent = mxOcx.GetEntity("选择图面的属性块:");if(ent == null){ return;}if (ent.ObjectName != "McDbBlockReference") { alert("选择的对象不是块引用");}else{ var blkref = ent; var sBlkFilePath =mxOcx.GetOcxAppPath() + "\\Blk\\Rect.dwg"; mxOcx.InsertBlock(sBlkFilePath, "MyBlk2"); var curDatabase = mxOcx.GetDatabase(); var blkTable =curDatabase.GetBlockTable(); var myblkRec =blkTable.GetAt("MyBlk2", false); if(myblkRec == null) { return; } blkref.BlockTableRecordId = myblkRec.ObjectID;}
十一、插入图块前修改图块文字c#中使用如下：
// 插入块的块名。 String sBlkName = "MyBlkName"; // 把要插入的块文件引入到控件数据库中。 String sBlkFile = axMxDrawX1.GetOcxAppPath() + "\\Blk\\attribblock.dwg"; axMxDrawX1.InsertBlock(sBlkFile, sBlkName); // 得到当前应用对象 MxDrawApplication app = new MxDrawApplication(); // 取到控件数据库 MxDrawDatabase database = app.WorkingDatabase(); // 得到块表对象 MxDrawBlockTable blkTable = database.GetBlockTable(); // 当前块表中是否已经有名为sBlkName的块表记录 MxDrawBlockTableRecord blkRec = blkTable.GetAt(sBlkName, true); if (blkRec == null) { // 证明InsertBlock函数失败，没有成功把文件插入数据库中。 return; } // 创建一个用于遍历块表遍历器 MxDrawBlockTableRecordIterator iter = blkRec.NewIterator(); if (iter == null) return; for (; !iter.Done(); iter.Step(true, false)) { // 得到遍历器当前的实体 MxDrawEntity ent = iter.GetEntity(); if (ent == null) continue; if (ent.ObjectName == "McDbText") { // 当前实体是一个文字 MxDrawText text = (MxDrawText)ent; // 修改文字内容为 "MyContent" text.TextString = "MyContent"; } } // 创建块引用，把图块插入到当前空间，并显示。 axMxDrawX1.DrawBlockReference(0, 0, sBlkName, 1.0, 0.0);
js中使用如下：
// 插入块的块名。var sBlkName = "MyBlkName";// 把要插入的块文件引入到控件数据库中。var sBlkFile = mxOcx.GetOcxAppPath()+ "\\Blk\\attribblock.dwg";mxOcx.InsertBlock(sBlkFile, sBlkName); // 取到控件数据库var database = mxOcx.GetDatabase();// 得到块表对象var blkTable =database.GetBlockTable();// 当前块表中是否已经有名为sBlkName的块表记录var blkRec =blkTable.GetAt(sBlkName, true);if (blkRec == null){ // 证明InsertBlock函数失败，没有成功把文件插入数据库中。 return;}// 创建一个用于遍历块表遍历器var iter = blkRec.NewIterator();if (iter == null) return;for (; !iter.Done(); iter.Step(true, false)){ // 得到遍历器当前的实体 var ent = iter.GetEntity(); if (ent == null) continue; if (ent.ObjectName == "McDbText") { // 当前实体是一个文字 var text =ent; // 修改文字内容为 "MyContent" text.TextString = "MyContent"; }}// 创建块引用，把图块插入到当前空间，并显示。mxOcx.DrawBlockReference(0, 0, sBlkName, 1.0, 0.0);
十二、获取块文字信息js中使用如下：
var database = mxOcx.GetDatabase();var blkTab = database.GetBlockTable();var iter = blkTab.NewIterator();for (; !iter.Done(); iter.Step(true, false)) { var blkRec = iter.GetRecord(); var iter1 = blkRec.NewIterator(); for (; !iter1.Done(); iter1.Step()) { var tmpEnt = iter1.GetEntity(); if (tmpEnt == null) continue; if (tmpEnt.ObjectName == "McDbText") { // 当前实体是一个文字 var text =tmpEnt; var txt=text.TextString; alert(txt.toString()); } }}
十三、修改块指定文字js中使用如下：
var database = mxOcx.GetDatabase();var blkTab = database.GetBlockTable();var iter = blkTab.NewIterator();for (; !iter.Done(); iter.Step(true, false)) { var blkRec = iter.GetRecord(); var iter1 = blkRec.NewIterator(); for (; !iter1.Done(); iter1.Step()) { var tmpEnt = iter1.GetEntity(); if (tmpEnt == null) continue; if (tmpEnt.ObjectName == "McDbText") { // 当前实体是一个文字 var text =tmpEnt; if(text.TextString =="123"){ // 修改文字内容为 "MyContent" text.TextString = "MyContent"; } } }}
十四、根据块名过滤js中使用如下：
var ss = mxOcx.NewSelectionSet();// 创建过滤对象.var spFilte = mxOcx.NewResbuf();// 把图块对象，当着过滤条件.spFilte.AddStringEx("INSERT", 5020);// 过滤块名spFilte.AddStringEx("123",2);// 得到图上，所有图块对象.ss.Select2(5, null, null, null, spFilte);var sTip = "共有" + ss.Count + "个图块";alert(sTip);
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