// This function returns the ObjectId for the BlockTableRecord called "EmployeeBlock",
// creating it if necessary. The block contains three entities - circle, text
// and ellipse.
private ObjectId CreateEmployeeDefinition()
{
ObjectId newBtrId = new ObjectId(); //The return value for this function
Database db = HostApplicationServices.WorkingDatabase; //save some space
using (Transaction trans = db.TransactionManager.StartTransaction()) //begin the transaction
{
// Now, access the database and obtain a reference to the BlockTable
BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForWrite);
if ((bt.Has("EmployeeBlock")))
{
newBtrId = bt["EmployeeBlock"];
}
else
{
Point3d center = new Point3d(0, 0, 0);
// Declare and define the entities we want to add:
// Circle:
Circle circle = new Circle(center, Vector3d.ZAxis, 2);
// Attribute Definition
AttributeDefinition text = new AttributeDefinition(center, "NoName", "Name:", "Enter Name", db.Textstyle);
text.ColorIndex = 2;
// Ellipse:
Ellipse ellipse = new Ellipse(center, Vector3d.ZAxis, new Vector3d(3, 0, 0), 0.5, 0, 0);
// Next, create a layer with the helper function, and assign the layer to our entities.
ObjectId empId = CreateLayer();
text.LayerId = empId;
circle.LayerId = empId;
ellipse.LayerId = empId;
// Set the color for each entity irrespective of the layer's color.
text.ColorIndex = 2;
circle.ColorIndex = 1;
ellipse.ColorIndex = 3;
// Create a new block definition called EmployeeBlock
BlockTableRecord newBtr = new BlockTableRecord();
newBtr.Name = "EmployeeBlock";
newBtrId = bt.Add(newBtr); //Add the block, and set the id as the return value of our function
trans.AddNewlyCreatedDBObject(newBtr, true); //Let the transaction know about any object/entity you add to the database!
newBtr.AppendEntity(circle); //Append our entities...
newBtr.AppendEntity(text);
newBtr.AppendEntity(ellipse);
trans.AddNewlyCreatedDBObject(circle, true); //Again, let the transaction know about our newly added entities.
trans.AddNewlyCreatedDBObject(text, true);
trans.AddNewlyCreatedDBObject(ellipse, true);
}
trans.Commit(); //All done, no errors? Go ahead and commit!
}
return newBtrId;
}
//This function returns the ObjectId for the BlockTableRecord called "EmployeeBlock",
//creating it if necessary. The block contains three entities - circle, text
//and ellipse.
public ObjectId CreateEmployeeDefinition()
{
ObjectId newBtrId = new ObjectId(); //The return value for this function
Database db = HostApplicationServices.WorkingDatabase; //save some space
// The "using" keyword used below automatically calls "Dispose"
// on the "trans" object.
using (Transaction trans = db.TransactionManager.StartTransaction())
{
//Now, drill into the database and obtain a reference to the BlockTable
BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForWrite);
if ((bt.Has("EmployeeBlock")))
{
newBtrId = bt["EmployeeBlock"];
}
else
{
Point3d center = new Point3d(10, 10, 0); // convenient declaration...
// Declare and define the entities we want to add:
//Circle:
Circle circle = new Circle(center, Vector3d.ZAxis, 2);
//Text:
MText text = new MText();
text.Contents = "Earnest Shackleton";
text.Location = center;
//Ellipse:
Ellipse ellipse = new Ellipse(center, Vector3d.ZAxis, new Vector3d(3, 0, 0), 0.5, 0, 0);
//Next, create a layer with the helper function, and assign
//the layer to our entities.
ObjectId empId = CreateLayer();
text.LayerId = empId;
circle.LayerId = empId;
ellipse.LayerId = empId;
//Set the color for each entity irrespective of the layer's color.
text.ColorIndex = 2;
circle.ColorIndex = 1;
ellipse.ColorIndex = 3;
//Create a new block definition called EmployeeBlock
BlockTableRecord newBtr = new BlockTableRecord();
newBtr.Name = "EmployeeBlock";
newBtrId = bt.Add(newBtr); //Add the block, and set the id as the return value of our function
trans.AddNewlyCreatedDBObject(newBtr, true); //Let the transaction know about any object/entity you add to the database!
newBtr.AppendEntity(circle); //Append our entities...
newBtr.AppendEntity(text);
newBtr.AppendEntity(ellipse);
trans.AddNewlyCreatedDBObject(circle, true); //Again, let the transaction know about our newly added entities.
trans.AddNewlyCreatedDBObject(text, true);
trans.AddNewlyCreatedDBObject(ellipse, true);
}
trans.Commit(); //All done, no errors? Go ahead and commit!
}
return newBtrId;
}
