Insert block with attribute

bahman.jf.68 — Sat, 19 Nov 2022 10:40:25 GMT

hello everyone,

I wanted to insert a block which is exsiting on the drawing to a new point and updating attribitue defenetion.

BlockReference bref = new BlockReference(ptm, acBlkTbl["TestBlock"]); foreach (ObjectId attId in bref.AttributeCollection) { AttributeReference ar = acTrans.GetObject(attId, OpenMode.ForRead) as AttributeReference; if (ar != null && ar.Tag.ToUpper() == "WTYPE") { ar.UpgradeOpen(); ar.TextString = "SR23"; ar.DowngradeOpen(); } } acBlkTblRec.AppendEntity(bref); acTrans.AddNewlyCreatedDBObject(bref, true); acTrans.Commit();

I didn't get any warning during the build, but does not appear any block at the point place.

Re: Insert block with attribute

_gile — Sat, 19 Nov 2022 17:18:01 GMT

Hi,

When you create/insert a new block reference, you must explicitly Create the attribute references (AttributeReference) and add them to the block attribute collection (AttributeCollection). This is done by using the attribute definitions (AttributeDefinition) contained in the block definition (BlockTableRecord) as templates. See this topic of the docs.

// Add the block reference BlockReference bref = new BlockReference(ptm, acBlkTbl["TestBlock"]); acBlkTblRec.AppendEntity(bref); acTrans.AddNewlyCreatedDBObject(bref, true); // Add the attribute references var blockDef = (BlockTableRecord)acTrans.GetObject(acBlkTbl["TestBlock"], OpenMode.ForRead); foreach (ObjectId id in blockDef) { if (id.ObjectClass == RXObject.GetClass(typeof(AttributeDefinition))) { var attDef = (AttributeDefinition)acTrans.GetObject(id, OpenMode.ForRead); if (!attDef.Constant) { var attRef = new AttributeReference(); attRef.SetAttributeFromBlock(attDef, bref.BlockTransform); bref.AttributeCollection.AppendAttribute(attRef); acTrans.AddNewlyCreatedDBObject(attRef, true); if (attRef.Tag.ToUpper() == "WTYPE") { attRef.TextString = "SR23"; } } } } acTrans.Commit();

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Insert block with attribute

Re: Insert block with attribute