public class ControlHelper
    {
        /// <summary>
        /// ComboBox控制元件繫結資料集列
        /// </summary>
        /// <param name="cb">控制元件名稱</param>
        /// <param name="dt">資料集</param>
        /// <param name="columnName">列名</param>
        public static void BindComboBox(ComboBox cb,DataTable dt,string
 
 columnName)
        {
            foreach(DataRow row in dt.Rows)
            {
                cb.Items.Add(row[columnName].ToString());
            }
        }
        /// <summary>
        /// ComboBox繫結資料，並排序
        /// </summary>
        /// <param name="cb">控制元件名稱</param>
        /// <param name="dt">
 
資料集</param>
        /// <param name="columnName">列名</param>
        /// <param name="isSorted">是否排序</param>
        public static void BindComboBox(ComboBox cb,DataTable dt,string columnName,bool isSorted)
        {
            if (!isSorted)
            {
                BindComboBox(cb, dt, columnName);
            }
            
 
else
            {
                DataView view = dt.DefaultView;
                view.Sort = string.Format("{0}", columnName);
                for(int i = 0; i < view.Count; i++)
                {
                    cb.Items.Add(view[i][columnName].ToString());
                }
            }
        }
        /// <summary>
        /// ComboBox繫結與顯示
        /// </summary>
        /// <param name="cb">控制元件</param>
        /// <param name="dt">資料集</param>
        /// <param name="displayMember">顯示名稱</param>
        /// <param name="valueMember">儲存名稱</param>
        public static void BindComboBox(ComboBox cb,DataTable dt,string displayMember,string valueMember)
        {
            cb.DisplayMember = displayMember;
            cb.ValueMember = valueMember;
            cb.DataSource = dt;
        }
        /// <summary>
        /// TreeView控制元件繫結資料集
        /// </summary>
        /// <param name="treeView">控制元件名稱</param>
        /// <param name="dt">資料集</param>
        /// <param name="columnName">列名</param>
        public static void BindTreeView(TreeView treeView,DataTable dt,string columnName)
        {
            foreach(DataRow row in dt.Rows)
            {
                treeView.Nodes.Add(row[columnName].ToString());
            }
        }
        /// <summary>
        /// TreeView控制元件繫結資料
        /// </summary>
        /// <param name="treeNode">控制元件節點名稱</param>
        /// <param name="dt">資料集</param>
        /// <param name="columnName">列名</param>
        public static void BindTreeView(TreeNode treeNode,DataTable dt,string columnName)
        {
            foreach(DataRow row in dt.Rows)
            {
                treeNode.Nodes.Add(row[columnName].ToString());
            }
        }
        /// <summary>
        /// LisbBox繫結資料
        /// </summary>
        /// <param name="listBox">控制元件名稱</param>
        /// <param name="dt">資料集</param>
        /// <param name="columnName">列名</param>
        public static void BindListBox(ListBox listBox,DataTable dt,string columnName)
        {
            listBox.Items.Clear();
            for(int i = 0; i < dt.Rows.Count; i++)
            {
                listBox.Items.Add(dt.Rows[i][columnName].ToString());
            }
        }
        /// <summary>
        /// CheckedListBox資料繫結
        /// </summary>
        /// <param name="checkedList">控制元件名稱</param>
        /// <param name="dt">資料集</param>
        /// <param name="columnName">列名</param>
        public static void BindCheckedListBox(CheckedListBox checkedList,DataTable dt,string columnName)
        {
            checkedList.Items.Clear();
            for(int i = 0; i < dt.Rows.Count; i++)
            {
                checkedList.Items.Add(dt.Rows[i][columnName].ToString());
            }
        }
        /// <summary>
        /// ListBox資料繫結與顯示
        /// </summary>
        /// <param name="listBox">控制元件名稱</param>
        /// <param name="dt">資料集</param>
        /// <param name="displayMember">顯示名稱</param>
        /// <param name="valueMember">儲存名稱</param>
        public static void BindListBox(ListBox listBox,DataTable dt,string displayMember,string valueMember)
        {
            listBox.DisplayMember = displayMember;
            listBox.ValueMember = valueMember;
            listBox.DataSource = dt;
        }
        /// <summary>
        /// 往ListBox中新增項
        /// </summary>
        /// <param name="listBox">控制元件名稱</param>
        /// <param name="itemValue">值</param>
        public static void AddItem(ListBox listBox,string itemValue)
        {
            for(int i = 0; i < listBox.Items.Count; i++)
            {
                if (listBox.Items[i].ToString() == itemValue)
                {
                    return;
                }
            }
            listBox.Items.Add(itemValue);
        }
        /// <summary>
        /// 判斷新增的項是否存在ListBox中
        /// </summary>
        /// <param name="listBox">控制元件名稱</param>
        /// <param name="itemValue">值</param>
        /// <returns></returns>
        public static bool IsInListBox(ListBox listBox,string itemValue)
        {
            for(int i = 0; i < listBox.Items.Count; i++)
            {
                if (listBox.Items[i].ToString() == itemValue)
                {
                    return true;
                }
            }
            return false;
        }
        /// <summary>
        /// 選擇ListBox項
        /// </summary>
        /// <param name="listBox">控制元件名稱</param>
        /// <param name="itemValue">值</param>
        public static void SelectItem(ListBox listBox,string itemValue)
        {
            for(int i = 0; i < listBox.Items.Count; i++)
            {
                if (listBox.Items[i].ToString() == itemValue)
                {
                    listBox.SelectedItem = listBox.Items[i];
                    return;
                }
            }
        }
    }