.NET上下左右移动操作支持多选

效果如下图：

代码如下：

    public partial class FieldShowSet : System.Web.UI.Page    {        Hashtable resources = EquStatusSearch.resources;        private string names = null;        IniOperation ini = new IniOperation("i18n");        Hashtable leftSelectItems = new Hashtable(); //左边选中项集合        Hashtable rightSelectItems = new Hashtable(); //右边选中项集合        protected void Page_Load(object sender, EventArgs e)        {            if (!Page.IsPostBack)            {                names = QuarrysClass.All;                initi18n();                string[] all = string.IsNullOrEmpty(names) ? null : names.Split(',');//分割出所有列                hidfShows.Value = ini.IniValue("Set", "Show");                string include = hidfShows.Value;//获取当前页展示列                if (string.IsNullOrEmpty(names) || all == null)                {                    //请先点加载配置信息                    return;                }                for (int i = 0; i < all.Length; i++)//遍历所有列                {                    if (include.IndexOf("@" + all[i] + "@") == -1)//当前列中不包含分割出来的列时放在不显示框中                    {                        leftListBox.Items.Add(new ListItem(resources[all[i]].ToString(), all[i]));                    }                }                string[] showNames = include.Split(',');                string newName = string.Empty;                foreach (string name in showNames)                {                    newName = name.Trim('@');                    string colName = resources[newName] == null ? string.Empty : resources[newName].ToString();                    if (!string.IsNullOrEmpty(newName))                    {                        rightListBox.Items.Add(new ListItem(colName, newName));                    }                }            }        }        //调用显示和展示字段名称        private void initi18n()        {            this.Page.Title = string.IsNullOrEmpty(resources["ShowSetName"].ToString()) ? "字段显示设置" : resources["ShowSetName"].ToString();            xLabel1.Text = string.IsNullOrEmpty(resources["ShowSetNoShow"].ToString()) ? "不显示字段" : resources["ShowSetNoShow"].ToString();            xLabel2.Text = string.IsNullOrEmpty(resources["ShowSetShow"].ToString()) ? "显示字段" : resources["ShowSetShow"].ToString();        }        //将未显示字段 右移 到显示字段框，并清除掉不显示的选择到的项        protected void rbtnMove_Click(object sender, EventArgs e)        {            if (leftListBox.SelectedItem == null)            {                return;            }            leftSelectItems.Clear();            foreach (ListItem item in leftListBox.Items)            {                if (item.Selected)                {                    if (!leftSelectItems.ContainsKey(item.Value))                    {                        leftSelectItems.Add(item.Value, item.Text);                    }                }            }            foreach (DictionaryEntry v in leftSelectItems)            {                leftListBox.Items.Remove(new ListItem(v.Value.ToString(),v.Key.ToString()));                rightListBox.Items.Add(new ListItem(v.Value.ToString(), v.Key.ToString()));            }        }        //将显示字段 左移 到未显示字段框，并清除掉显示的选择到的项        protected void lbtnMove_Click(object sender, EventArgs e)        {            if (rightListBox.SelectedItem == null)            {                return;            }            rightSelectItems.Clear();            foreach (ListItem item in rightListBox.Items)            {                if (item.Selected)                {                    if (!rightSelectItems.ContainsKey(item.Value))                    {                        rightSelectItems.Add(item.Value, item.Text);                    }                }            }            foreach (DictionaryEntry v in rightSelectItems)            {                rightListBox.Items.Remove(new ListItem(v.Value.ToString(), v.Key.ToString()));                leftListBox.Items.Add(new ListItem(v.Value.ToString(), v.Key.ToString()));            }        }        //将左边所有不显示项加到右边的显示项中        protected void btnAllLMove_Click(object sender, EventArgs e)        {            foreach (ListItem item in leftListBox.Items)            {                rightListBox.Items.Add(item);            }            leftListBox.Items.Clear();        }        //将右边所有不显示项加到左边的显示项中        protected void btnAllRMove_Click(object sender, EventArgs e)        {            foreach (ListItem item in rightListBox.Items)            {                leftListBox.Items.Add(item);            }            rightListBox.Items.Clear();        }        //点击设置按钮事件，        protected void btnSet_Click(object sender, EventArgs e)        {            try            {                string str = "";                for (int i = 0; i < rightListBox.Items.Count; i++)//循环添加显示项组成字符串                {                    str += "@" + rightListBox.Items[i].Value + "@,";                }                if ("".Equals(str))//如果显示项为空直接清除显示页面的所有字段                {                    QuarrysClass.Shows = "";                }                else                {                    //重新复制显示字段到显示页面                    QuarrysClass.Shows = str.Substring(0, str.Length - 1);                }                //调用主页面将显示字段写入到i18n文件中                ini.IniWriteValue("Set", "Show", QuarrysClass.Shows);                Page.ClientScript.RegisterStartupScript(this.GetType(), "warn", "alert('设置成功！');window.opener.searchData();window.close();", true);            }            catch (Exception ex)            {                string strScript = string.Format("alert('设置失败！{0}');", ex.Message);                Page.ClientScript.RegisterStartupScript(this.GetType(), "warn", strScript, true);            }        }        /*************************************************************************/        /// <summary>        /// 得到选定项的值        /// </summary>        /// <returns></returns>        protected string[] getSelectedValue()        {            ArrayList a = new ArrayList();            for (int i = 0; i < rightListBox.Items.Count; i++)            {                if (rightListBox.Items[i].Selected)                {                    a.Add(i);                }            }            int[] indices = new int[a.Count];  //得到选中项的索引集合            a.CopyTo(indices);            string[] strs = new string[indices.Length];            for (int i = 0; i < indices.Length; i++)            {                strs[i] = rightListBox.Items[indices[i]].Value;            }            return strs;        }        /// <summary>        /// 得到选定项的内容        /// </summary>        /// <returns></returns>        protected string[] getSelectedText()        {            ArrayList a = new ArrayList();            for (int i = 0; i < rightListBox.Items.Count; i++)            {                if (rightListBox.Items[i].Selected)                {                    a.Add(i);                }            }            int[] indices = new int[a.Count];  //得到选中项的索引集合            a.CopyTo(indices);            string[] strs = new string[indices.Length];            for (int i = 0; i < indices.Length; i++)            {                strs[i] = rightListBox.Items[indices[i]].Text;            }            return strs;        }        //上移        protected void btnUp_Click(object sender, EventArgs e)        {            UpMove();        }        //下移        protected void btnDown_Click(object sender, EventArgs e)        {            DownMove();        }        void UpMove()        {            if (rightListBox.SelectedIndex > 0)            {                string[] newValue = getSelectedValue();                string[] newText = getSelectedText();                ArrayList a = new ArrayList();                for (int i = 0; i < rightListBox.Items.Count; i++)                {                    if (rightListBox.Items[i].Selected)                    {                        a.Add(i);                    }                }                int[] indices = new int[a.Count];  //得到选中项的索引集合                a.CopyTo(indices);                for (int i = 0; i < indices.Length; i++)                {                    int newIndex = indices[i];                    //交换位置                    rightListBox.Items[newIndex].Value = rightListBox.Items[newIndex - 1].Value;                    rightListBox.Items[newIndex].Text = rightListBox.Items[newIndex - 1].Text;                    rightListBox.Items[newIndex - 1].Value = newValue[i];                    rightListBox.Items[newIndex - 1].Text = newText[i];                    rightListBox.Items[newIndex - 1].Selected = true;                    rightListBox.Items[newIndex].Selected = false;                }                rightListBox.Items[indices[indices.Length - 1]].Selected = false;            }        }        void DownMove()        {            string[] newValue = getSelectedValue();            string[] newText = getSelectedText();            ArrayList a = new ArrayList();            for (int i = 0; i < rightListBox.Items.Count; i++)            {                if (rightListBox.Items[i].Selected)                {                    a.Add(i);                }            }            int[] indices = new int[a.Count];  //得到选中项的索引集合            a.CopyTo(indices);            if (indices[a.Count - 1] < rightListBox.Items.Count - 1)  //选中项的最大索引小于列表总项数            {                for (int i = indices.Length - 1; i >= 0; i--)                {                    int newIndex = indices[i];                    //交换位置                    rightListBox.Items[newIndex].Value = rightListBox.Items[newIndex + 1].Value;                    rightListBox.Items[newIndex].Text = rightListBox.Items[newIndex + 1].Text;                    rightListBox.Items[newIndex + 1].Value = newValue[i];                    rightListBox.Items[newIndex + 1].Text = newText[i];                    rightListBox.Items[newIndex + 1].Selected = true;                    rightListBox.Items[newIndex].Selected = false;                }                rightListBox.Items[indices[0]].Selected = false;            }        }        void TopMove()        {            string[] newValue = getSelectedValue();            string[] newText = getSelectedText();            ArrayList a = new ArrayList();            for (int i = 0; i < rightListBox.Items.Count; i++)            {                if (rightListBox.Items[i].Selected)                {                    a.Add(i);                }            }            int[] indices = new int[a.Count];  //得到选中项的索引集合            a.CopyTo(indices);            for (int i = 0; i < indices.Length; i++)            {                int newIndex = indices[i];                for (int j = newIndex - 1; j >= 0; j--)                {                    rightListBox.Items[j + 1].Text = rightListBox.Items[j].Text;                    rightListBox.Items[j + 1].Value = rightListBox.Items[j].Value;                }                rightListBox.Items[0].Value = newValue[indices.Length - 1 - i];                rightListBox.Items[0].Text = newText[indices.Length - 1 - i];                rightListBox.Items[newIndex].Selected = false;                rightListBox.Items[i].Selected = true;            }        }        void BottomMove()        {            string[] newValue = getSelectedValue();            string[] newText = getSelectedText();            ArrayList a = new ArrayList();            for (int i = 0; i < rightListBox.Items.Count; i++)            {                if (rightListBox.Items[i].Selected)                {                    a.Add(i);                }            }            int[] indices = new int[a.Count];  //得到选中项的索引集合            a.CopyTo(indices);            for (int i = indices.Length - 1; i >= 0; i--)            {                int newIndex = indices[i];                //获取总的数目                int newCount = rightListBox.Items.Count;                for (int j = newIndex; j < newCount - 1; j++)                {                    rightListBox.Items[j].Text = rightListBox.Items[j + 1].Text;                    rightListBox.Items[j].Value = rightListBox.Items[j + 1].Value;                }                rightListBox.Items[newCount - 1].Value = newValue[indices.Length - 1 - i];                rightListBox.Items[newCount - 1].Text = newText[indices.Length - 1 - i];                rightListBox.Items[newIndex].Selected = false;                rightListBox.Items[newCount - 1 - (indices.Length - 1 - i)].Selected = true;            }        }        protected void btnTop_Click(object sender, EventArgs e)        {            TopMove();        }        protected void btnBottom_Click(object sender, EventArgs e)        {            BottomMove();        }    }