public static void ChangeNameBR()
{
// Get the current document editor
Editor acDocEd = Application.DocumentManager.MdiActiveDocument.Editor;
Database db = Application.DocumentManager.MdiActiveDocument.Database;
// Create a TypedValue array to define the filter criteria
TypedValue[] acTypValAr = new TypedValue[1];
acTypValAr.SetValue(new TypedValue((int)DxfCode.Start, "MTEXT"), 0);
// Assign the filter criteria to a SelectionFilter object
SelectionFilter acSelFtr = new SelectionFilter(acTypValAr);
// Request for objects to be selected in the drawing area
PromptSelectionResult acSSPrompt = acDocEd.GetSelection(acSelFtr);
// If the prompt status is OK, objects were selected
if (acSSPrompt.Status == PromptStatus.OK)
{
SelectionSet acSSet = acSSPrompt.Value;
SelectedObject[] chosenMtextArr = new SelectedObject[1];
acSSet.CopyTo(chosenMtextArr, 0);
Transaction trans = db.TransactionManager.StartTransaction();
MText mtext = trans.GetObject(chosenMtextArr[0].ObjectId, OpenMode.ForRead, true) as MText;
string mtextText = mtext.Contents.ToString();
Application.ShowAlertDialog("Selected object: " + mtextText);
//Block reference
PromptEntityResult promptEntity = acDocEd.GetEntity("Choose a Block Reference");
if (acSSPrompt.Status != PromptStatus.OK)
{
acDocEd.WriteMessage("Block Reference choosing failed!");
return;
}
string attbName = "HEIGHT";
BlockReference blockReference = trans.GetObject(promptEntity.ObjectId, OpenMode.ForRead, true) as BlockReference;
foreach (ObjectId arId in blockReference.AttributeCollection)
{
AttributeReference ar = trans.GetObject(arId, OpenMode.ForRead) as AttributeReference;
if (null == ar)
{
acDocEd.WriteMessage("AttributeReference getting failed!");
return;
}
if (ar.Tag.ToUpper() == attbName)
{
ar.UpgradeOpen();
ar.TextString = mtextText;
ar.DowngradeOpen();
}
}
trans.Commit();
}
else
{
Application.ShowAlertDialog("Number of objects selected: 0");
}
}
