Passing information: parameter vs property.

Hi,

Which method is best for passing information?
I have created 3-layered architecture

GUI - MODEL(BL) - DAL

here is what I have coded

BL OBJECT

Category
{
  public string CategoryName {get;set;}

 Category()
 {
  //do nothing
 }

 Category(string categoryName)
 {
  CategoryName = categoryName;
 }

 DeleteCategory()
 {
 }
}

DAL

CategoryDao
{
 DeleteCategory(string CategoryName)
 {
          SqlConnection SqlConn = new ....
          SqlCommand sqlCmd = new ....
          cmd.paramater.AddWithValue("@categoryName",CategoryName);

           try
         {
                bla..
        }
        Catch....
 }
}


UI Layer

some.aspx.cs

btnDeleteCategory_Click(Sender s, Eventargs arg)
{

  //My QUESTION -> IS THIS A GOOD APPROACH
  Category c = new Category(txtCategoryName.Text)
  c.DeleteCategory();

  //OR

  //SHOULD IT BE DONE THIS WAY
 Category c = new Category()
 c.DeteleCategory(categoryName);   -> Consider that DeleteCategory takes one string argument.
 
}


Regards and THANKS in advance