OA系统

开发平台：
C#

MultiSelector.cs：源码内容
							﻿using System;
using System.Collections;
using System.Web;
using System.Web.UI;
using System.Drawing;
using System.ComponentModel;
using System.Drawing.Design;
using System.Web.UI.WebControls;
using System.Collections.Generic;
[assembly: TagPrefix("OThinker.H3.WorkSheet", "SheetControls")]
namespace OThinker.H3.WorkSheet
{
    /// <summary>
    /// MultiSelector 的摘要说明。
    /// </summary>
    [ToolboxBitmap(typeof(MultiSelector), "OThinker.H3.WorkSheet.MultiSelector.bmp")]
    [ToolboxData("<{0}:MultiSelector runat=server></{0}:MultiSelector>")]
    public class MultiSelector : System.Web.UI.WebControls.WebControl
    {
        private ListBox _OptionList = new ListBox();
        /// <summary>
        /// 用于存储多值
        /// </summary>
        public ListBox OptionList
        {
            get
            {
                return this._OptionList;
            }
        }
        private ListBox _SelectionList = new ListBox();
        /// <summary>
        /// 用于存储多值
        /// </summary>
        public ListBox SelectionList
        {
            get
            {
                return this._SelectionList;
            }
        }
        private TextBox _SelectionText = new TextBox();
        /// <summary>
        /// 用于存储用户ID
        /// </summary>
        public TextBox SelectionText
        {
            get
            {
                return this._SelectionText;
            }
        }
        private char _Separator = ';';
        /// <summary>
        /// Value的分隔符
        /// </summary>
        public char Separator
        {
            get
            {
                return this._Separator;
            }
            set
            {
                this._Separator = value;
            }
        }
        public MultiSelector()
        {
            this.Controls.Add(this.OptionList);
            this.Controls.Add(this.SelectionList);
            this.Controls.Add(this.SelectionText);
        }
        #region 可选的名称和值
        private List<string> OptionNameList = new List<string>();
        public string[] OptionNames
        {
            get
            {
                return this.OptionNameList.ToArray();
            }
            set
            {
                if (value != null)
                {
                    this.OptionNameList = new List<string>(value);
                }
                else
                {
                    this.OptionNameList = new List<string>();
                }
                this.UpdateOptionList();
            }
        }
        private List<string> OptionValueList = new List<string>();
        public string[] OptionValues
        {
            get
            {
                return this.OptionValueList.ToArray();
            }
            set
            {
                if (value != null)
                {
                    this.OptionValueList = new List<string>(value);
                }
                else
                {
                    this.OptionValueList = new List<string>();
                }
                this.UpdateOptionList();
            }
        }
        public string GetOptionName(string Value)
        {
            int count = 0;
            for (count = 0; count < this.OptionValueList.Count; count++)
            {
                if (Value == this.OptionValueList[count])
                {
                    break;
                }
            }
            if (count == this.OptionValueList.Count)
            {
                return Value;
            }
            else if (count >= this.OptionNameList.Count)
            {
                return Value;
            }
            else
            {
                return this.OptionNameList[count];
            }
        }
        private void UpdateOptionList()
        {
            this.OptionList.Items.Clear();
            for (int count = 0; count < this.OptionValueList.Count; count++)
            {
                string value = this.OptionValueList[count];
                string name = null;
                if (count < this.OptionNameList.Count)
                {
                    name = this.OptionNameList[count];
                }
                this.OptionList.Items.Add(new ListItem(name, value));
            }
        }
        #endregion
        #region 加载选中的值
        public string[] SelectedItems
        {
            get
            {
                string text = this.SelectionText.Text;
                if (text == null)
                {
                    return null;
                }
                else
                {
                    string[] items = text.Split(new char[] { this.Separator });
                    List<string> list = new List<string>();
                    if (items != null)
                    {
                        foreach (string item in items)
                        {
                            if (item != null && item != "")
                            {
                                list.Add(item);
                            }
                        }
                    }
                    return list.ToArray();
                }
            }
            set
            {
                this.SelectionText.Text = null;
                this.SelectionList.Items.Clear();
                if (value == null)
                {
                    return;
                }
                foreach (string itemValue in value)
                {
                    string itemName = this.GetOptionName(itemValue);
                    this.SelectionText.Text += (itemValue + ";");
                    this.SelectionList.Items.Add(new ListItem(itemName, itemValue));
                }
            }
        }
        #endregion
        protected override void Render(HtmlTextWriter writer)
        {
            // 计算高度和宽度
            double listWidth = (this.Width.Value - 16) / 2;
            if (listWidth < 0)
            {
                listWidth = 0;
            }
            double listHeight = this.Height.Value;
            string styleAttrbites = null;
            if (this.Width.Type == UnitType.Percentage)
            {
                styleAttrbites = "width:100%;";
            }
            else
            {
                this.SelectionList.Width = new Unit(listWidth);
                this.OptionList.Width = new Unit(listWidth);
            }
            if (this.Height.Type == UnitType.Percentage)
            {
                styleAttrbites += "height:100%;";
            }
            else
            {
                this.SelectionList.Height = new Unit(listHeight);
                this.OptionList.Height = new Unit(listHeight);
            }
            if (styleAttrbites != null)
            {
                this.SelectionList.Attributes.Add("style", styleAttrbites);
                this.OptionList.Attributes.Add("style", styleAttrbites);
            }
            writer.Write("<TABLE WIDTH="" + this.Width + "" HEIGHT="" + this.Height + "" cellpadding="0" cellspacing="0" border="0">");
            writer.Write("<TR>");
            writer.Write("<TD>");
            this.OptionList.RenderControl(writer);
            writer.Write("</TD>");
            writer.Write("<TD>");
            // 如果可编辑，则显示编辑按钮
            if (this.Enabled)
            {
                string addScript =
                    // 获得选中的值
                    "var optionListId='" + this.OptionList.ClientID + "';" + System.Environment.NewLine +
                    "var optionList = document.getElementById(optionListId);" + System.Environment.NewLine +
                    "var selectedValue; " +
                    "var selectedName;" + System.Environment.NewLine +
                    "for (i = optionList.length - 1; i >= 0; i--)" + System.Environment.NewLine +
                    "{" + System.Environment.NewLine +
                    "   if (optionList.options[i].selected == true)" + System.Environment.NewLine +
                    "   {" + System.Environment.NewLine +
                    "       selectedValue=optionList.options[i].value;" + System.Environment.NewLine +
                    "       selectedName=optionList.options[i].text;" + System.Environment.NewLine +
                    "   }" + System.Environment.NewLine +
                    "}" + System.Environment.NewLine +
                    // 检查是否重复
                    "var selectedListId='" + this.SelectionList.ClientID + "';" + System.Environment.NewLine +
                    "var selectedList = document.getElementById(selectedListId);" + System.Environment.NewLine +
                    "for (i = selectedList.length - 1; i >= 0; i--)" + System.Environment.NewLine +
                    "{" + System.Environment.NewLine +
                    "   if (selectedList.options[i].value == selectedValue)" + System.Environment.NewLine +
                    "   {" + System.Environment.NewLine +
                    "       alert('该项已经存在');" + System.Environment.NewLine +
                    "       return;" + System.Environment.NewLine +
                    "   }" +
                    "}" +
                    // 添加到选中列表中
                    "var nodeValue = '<option value=' + selectedValue + '>';" +
                    "node = document.createElement(nodeValue);" +
                    "text = document.createTextNode(selectedName);" +
                    "node.appendChild(text);" +
                    "selectedList.appendChild(node);" +
                    "var selectedTextId = '" + this.SelectionText.ClientID + "';" +
                    "var selectedText = document.getElementById(selectedTextId);" +
                    "selectedText.value = selectedText.value + selectedValue + '" + this.Separator.ToString() + "';";
                writer.Write("<A onclick="javascript:" + addScript + ";" style="CURSOR: hand" >&gt;</A>");
                writer.Write("<BR>");
                string clearScript =
                        "var listId='" + this.SelectionList.ClientID + "';" + System.Environment.NewLine +
                        "var selectedIdId='" + this.SelectionText.ClientID + "';" + System.Environment.NewLine +
                        "var objlist=document.getElementById(listId);" + System.Environment.NewLine +
                        "var removedId;" + System.Environment.NewLine +
                        "if(objlist.length != null && objlist.length != 0)" +
                        "{" +
                            "for(i=objlist.length-1;i>=0;i--)" + System.Environment.NewLine +
                            "{" + System.Environment.NewLine +
                                "if(objlist.options[i].selected == true)" + System.Environment.NewLine +
                                "{" + System.Environment.NewLine +
                                    "removedId = objlist.options[i].value;" + System.Environment.NewLine +
                                    "objlist.remove(i);" + System.Environment.NewLine +
                                "}" + System.Environment.NewLine +
                            "}" + System.Environment.NewLine +
                        "}" +
                        "if(removedId == null || removedId == '')" + System.Environment.NewLine +
                        "{" +
                            "alert('没有选中成员');" + System.Environment.NewLine +
                        "}" +
                        "else" +
                        "{" + System.Environment.NewLine +
                    // 从ID文本中删除
                            @"var selectedUsers = document.getElementById(selectedIdId).value;" + System.Environment.NewLine +
                            @"var start = selectedUsers.indexOf(removedId);
                            var preStr = selectedUsers.substring(0, start);
                            var postStart = start + removedId.length + 1;
                            var postEnd = selectedUsers.length;
                            var postStr = selectedUsers.substring(postStart, postEnd);
        
                            document.getElementById(selectedIdId).value = preStr + postStr;
                        }";
                writer.Write("<A onclick="javascript:" + clearScript + "" style="CURSOR: hand" >&lt;</A>");
            }
            writer.Write("</TD>");
            writer.Write("<TD>");
            this.SelectionText.Attributes.Add("style", "display:none;");
            this.SelectionList.RenderControl(writer);
            this.SelectionText.RenderControl(writer);
            writer.Write("</TD>");
            writer.Write("</TR>");
            writer.Write("</TABLE>");
        }
    }
}

						