DbTools/DbToolsTester/Forms/TableChooserForm.cs

using DbTools;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SQLite;
using System.IO;
using System.Linq;

namespace DbToolsTester.Forms {
    public partial class TableChooserForm : DevExpress.XtraEditors.XtraForm {
        List<TreeItem> TreeItems = new List<TreeItem>();

        public string SelectedTable { get; private set; }
        public string SelectedDatabase { get; private set; }

        public TableChooserForm() {
            InitializeComponent();
        }

        private int AddTreeItem(string text, int parentId = 0) {
            TreeItems.Add(new TreeItem(text, TreeItems.Count + 1, parentId));
            return TreeItems.Count;
        }

        private void TableChooserForm_Load(object sender, EventArgs e) {
            SqlBuilder builder = new SqlBuilder();
            int db1 = AddTreeItem(Path.GetFileName(MainForm.Instance.Database1File));
            int db2 = AddTreeItem(Path.GetFileName(MainForm.Instance.Database2File));

            using (SQLiteConnection cn = new SQLiteConnection("Data Source=" + MainForm.Instance.Database1File + "; Version=3;")) {
                string[] tables = builder.GetTableNames(cn).OrderBy(f => f).ToArray();
                foreach (string table in tables) {
                    AddTreeItem(table, db1);
                }
            }

            using (SQLiteConnection cn = new SQLiteConnection("Data Source=" + MainForm.Instance.Database2File + "; Version=3;")) {
                string[] tables = builder.GetTableNames(cn).OrderBy(f => f).ToArray();
                foreach (string table in tables) {
                    AddTreeItem(table, db2);
                }
            }

            treeList1.DataSource = TreeItems;
            treeList1.ExpandAll();
        }

        private void treeList1_FocusedNodeChanged(object sender, DevExpress.XtraTreeList.FocusedNodeChangedEventArgs e) {
            if (e.Node == null || e.Node.ParentNode == null) {
                SelectedTable = null;
                SelectedDatabase = null;
                return;
            }
            SelectedDatabase = e.Node.ParentNode.GetValue(0).ToString();
            SelectedTable = e.Node.GetValue(0).ToString();
        }
    }

    internal class TreeItem {
        public int ID { get; set; }
        public int ParentID { get; set; }
        public string Text { get; set; }

        public TreeItem() { }
        public TreeItem(string text, int id, int parentId = 0) {
            ID = id;
            ParentID = parentId;
            Text = text;
        }
    }
}