好多年没写文章了
这里就分享点自己原创的一点破代码,效果如图下:
本人的提供的代码如下:
using System;
using System.Collections.Generic;
using System.Text;
using System.Web.UI.WebControls;
namespace Interface.Common
{
public interface IDropDownTree : IDisposable
{ /// <summary> /// 返回Dictionary里分别对应ID,文本,如果没有子节点返回null /// </summary> /// <param name="parentID">父节点ID</param>
/// <returns></returns> Dictionary<string, string> GetChildCategory(string parentID); /// <summary> /// 代码里写return new Interface.Common.DropDownTree(this); /// </summary> DropDownTree DropDownTree { get; } } public sealed class DropDownTree { IDropDownTree _DropDownTree; public DropDownTree(IDropDownTree dropDownTree) { _DropDownTree = dropDownTree; } /// <summary> /// 用于树的前缀 /// </summary> /// <param name="IsLast">是否是同级节点中的最后一个</param> /// <param name="HasChild">本节点是否拥有子节点</param> /// <param name="ParentString">父节点前缀符号</param> /// <returns>本节点的前缀</returns> private string GetPreFix(bool isLast, bool hasChild, string parentString) { string result = string.Empty; if (!string.IsNullOrEmpty(parentString)) { parentString = parentString.Remove(parentString.Length - 1).Replace("├", "│").Replace("└", " "); result += parentString; } if (isLast) { result += "└"; } else { result += "├"; } if (hasChild) { result += "┬"; } else { result += "─"; } return result; } 绑定下拉菜单 }
}
调用方法很简单:
1.继承自IDropDownTree接口
2.实现3个接口方法
实现接口代码示例[Dispose方法自己实现],最主要的是自己实现获得子级的方法
#region IDropDownTree 成员 public Dictionary<string, string> GetChildCategory(string parentID) { string where = "ParentID='" + parentID + "'"; if (string.IsNullOrEmpty(parentID)) { where = "ParentID is null or ParentID='" + Guid.Empty + "'"; } List<GoodsCategoryBean> _GoodsCategoryList = SelectList(0, where, string.Empty, false); if (_GoodsCategoryList != null && _GoodsCategoryList.Count > 0) { Dictionary<string, string> categoryList = new Dictionary<string, string>(); for (int i = 0; i < _GoodsCategoryList.Count; i++) { categoryList.Add(_GoodsCategoryList[i].ID.ToString(), _GoodsCategoryList[i].GategoryName); } return categoryList; } return null; } public Interface.Common.DropDownTree DropDownTree { get { return new Interface.Common.DropDownTree(this); } } #endregion
页面调用代码: 类名.DropDownTree.BindToDropDownList(下拉控件ID);
希望对大伙有点帮助....
