C#/ASP .NET - Parent/Child check boxes

This is 2.0, so GridView would be fine.  I really don't care how it works - just that it works!  

-  I need to read all of the checked boxes to store them in a database table
-  I need to hide the Types by default, and toggle visibility based upon if the parent Department is checked
-  Later, I'll need to prepopulate this form too

No, it would actually be better to use a TreeView with 2.0, since it has the ShowCheckBoxes property:

      <asp:TreeView ID="TreeView1" runat="server" Style="z-index: 100; left: 96px; position: absolute; top: 64px" ShowCheckBoxes="All">
      </asp:TreeView>

You can add Department nodes to the Tree, and Type child nodes to the Department nodes.

Bob

Can you give me a bit more detail, LearnedOne?  I'm looking for how to properly query the database to populate the treeview.  Also, in my Googling on Treeview it appears that the parent node can't be 'checked'.  I need it to be selectable.

1) Get a DataSet with 2 tables (Department and DepartmentType )
2) Create a DataRelation between the two tables (Department.ID = DepartmentType.ID)
3) Loop through the parent rows from the Department table, create TreeNodes, and add them to the the tree root
4) Loop through all the child rows from the DepartmentType, using parentRow.GetChildRows(relationName) and add child nodes to the parent Department node.

Bob

and one more thing is how can I get the checked event on the department to show all other departmenttype... in addition to save them back to the database.

Perhaps i am a little late to even reply to this post ... but I wrote a small prg that could be helpfull in your case ....


private void Page_Load(object sender, System.EventArgs e)
            {
                  // Put user code to initialize the page here
                  if (IsPostBack && Request.Form["__EVENTTARGET"] != null && Request.Form["__EVENTTARGET"] != "")
                  {
                        ViewState["checkedID"] = Request.Form["__EVENTTARGET"].ToString();
                        this.ConstructCheckBoxes();
                  }
                  else
                  {
                        this.ConstructCheckBoxes();
                  }
            }

            private void ConstructCheckBoxes()
            {
                  
                  HtmlTable ht = new HtmlTable();
                  ht.CellPadding = 5;
                  ht.CellSpacing = 0;

                  HtmlTableCell tc = new HtmlTableCell();
                  HtmlTableRow tr = new HtmlTableRow();

                  for(int i=0; i<=10; i++)
                  {  
                        Literal litSpace = new Literal();
                        tr = new HtmlTableRow();
                        tc = new HtmlTableCell();

                        CheckBox ch = new CheckBox();
                        ch.ID = "id" + i.ToString();
                        ch.Text = "CheckBox" + i.ToString();
                        ch.AutoPostBack = true;

                        ch.CheckedChanged += new System.EventHandler(this.ch_CheckedChanged);
                        
                        if (ViewState["checkedID"] != null)
                        {
                              if(ch.ID.ToString() == ViewState["checkedID"].ToString())
                              {
                                    ch.Checked = true;
                              }
                        }
                  
                        litSpace.Text = "child: ";
                        
                        if ((i % 2) == 1)
                        {
                              tc.Controls.Add(litSpace);
                              tc.Controls.Add(ch);
                        }
                        else
                        {
                              tc.Controls.Add(ch);
                        }

                        tr.Cells.Add(tc);
                        ht.Rows.Add(tr);
                  }

                  
                  Panel1.Controls.Add(ht);
            }

            
            #region Web Form Designer generated code
            override protected void OnInit(EventArgs e)
            {
                  //
                  // CODEGEN: This call is required by the ASP.NET Web Form Designer.
                  //
                  InitializeComponent();
                  base.OnInit(e);
            }
            
            /// <summary>
            /// Required method for Designer support - do not modify
            /// the contents of this method with the code editor.
            /// </summary>
            private void InitializeComponent()
            {    
                  this.Load += new System.EventHandler(this.Page_Load);

            }
            #endregion

            private void ch_CheckedChanged(object sender, System.EventArgs e)
            {
                  
            }

a couple of things i save checkbox id in a view state and in your case it will have to be database ... also as you noticed i constructed check boxes dynamically and added them to a panel ...

in my logic every odd check box id is a child ... this is just for this example ... in your case a database particular id or table handler value will be checked ....

So I'm almost there now (with LearnedOne's approach).

-  Is there a way to hide the root node (or I'm going to have to create 10 copies of the node for the 10 Departments)
-  Is there a way to remove the + and have it expand when the checkbox is checked?

I think those are the last hangups.