转:打造DropDownList,TreeView,ListBox无限极分类目录树
2013-09-18 12:12
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[csharp] view plaincopyprint? #region DropDownList无限递归显示层次关系 /// <summary> /// 创建无限分级下拉列表框 /// </summary> /// <param name="ddlst">下拉控件</param> /// <param name="dt">源DataTable</param> /// <param name="text">text字段</param> /// <param name="value">value字段</param> /// <param name="parentid">深度字段 例如parentid</param> public static void CreateLevelDropDown(DropDownList ddlst, DataTable dt, string text, string value, string parentid) { ArrayList allItems = new ArrayList(); DataRow[] rows = dt.Select(parentid + "=0"); foreach (DataRow row in rows) CreateLevelDropDownAssistant(dt, ref allItems, row, string.Empty, text, value, parentid); ListItem[] items = new ListItem[allItems.Count]; allItems.CopyTo(items); ddlst.Items.AddRange(items); } /// <summary> /// 递归绑定子节点 /// </summary> /// <param name="dt">源DataTable</param> /// <param name="items">数组</param> /// <param name="parentRow">当前节点</param> /// <param name="curHeader">前缀</param> /// <param name="text">text字段</param> /// <param name="value">value字段</param> /// <param name="parentid">深度字段 例如parentid</param> private static void CreateLevelDropDownAssistant(DataTable dt, ref ArrayList items, DataRow parentRow, string curHeader, string text, string value, string parentid) { ListItem newItem = new ListItem(curHeader + Until.CutString(parentRow[text].ToString(), 18, true), parentRow[value].ToString()); items.Add(newItem); DataRow[] rows = dt.Select(parentid + "=" + newItem.Value); for (int i = 0; i < rows.Length - 1; i++) CreateLevelDropDownAssistant(dt, ref items, rows[i], curHeader.Replace("┣", "┃").Replace("┗", "┣") + "┣", text, value, parentid); if (rows.Length > 0) CreateLevelDropDownAssistant(dt, ref items, rows[rows.Length - 1], curHeader.Replace("┣", "┃").Replace("┗", "┣") + "┗", text, value, parentid); } #endregion #region TreeView 无限递归显示层次关系目录树 /// <summary> /// 创建无限分级目录树TreeView /// </summary> /// <param name="treeview">TreeView空间</param> /// <param name="dt">数据源DataTable</param> /// <param name="text">text字段</param> /// <param name="value">value字段</param> /// <param name="parentid">深度字段 例如parentid</param> public static void CreateLevelTreeView(TreeView treeview, DataTable dt, string text, string value, string parentid) { DataView dv = dt.DefaultView; dv.RowFilter = parentid + "=0"; foreach (DataRowView drv in dv) { TreeNode node = new TreeNode(); node.Text = drv[text].ToString(); node.Value = drv[value].ToString(); node.Expanded = false; treeview.Nodes.Add(node); CreatTreeViewChildNode(dv, node, text, value, parentid); } } /// <summary> /// 递归绑定子节点 /// </summary> /// <param name="dv">源DataView</param> /// <param name="parentNode">当前节点</param> /// <param name="text">text字段</param> /// <param name="value">value字段</param> /// <param name="parentid">深度字段 例如parentid</param> private static void CreatTreeViewChildNode(DataView dv, TreeNode parentNode, string text, string value, string parentid) { dv.RowFilter = parentid + "=" + parentNode.Value; foreach (DataRowView row in dv) { TreeNode replyNode = new TreeNode(); replyNode.Text = row[text].ToString(); replyNode.Value = row[value].ToString(); replyNode.Expanded = false; parentNode.ChildNodes.Add(replyNode); CreatTreeViewChildNode(dv, replyNode, text, value, parentid); } } /// <summary> /// 创建无限分级目录树TreeView /// </summary> /// <param name="treeview">TreeView空间</param> /// <param name="dt">数据源DataTable</param> /// <param name="text">text字段</param> /// <param name="value">value字段</param> /// <param name="url">url字段</param> /// <param name="parentid">深度字段 例如parentid</param> public static void CreateLevelTreeView(TreeView treeview, DataTable dt, string text, string value, string url, string parentid) { DataView dv = dt.DefaultView; dv.RowFilter = parentid + "=0"; foreach (DataRowView drv in dv) { TreeNode node = new TreeNode(); node.Text = drv[text].ToString(); node.Value = drv[value].ToString(); node.NavigateUrl = drv
原文地址:[url=http://blog.csdn.net/smartsmile2012/article/details/7998590]http://blog.csdn.net/smartsmile2012/article/details/7998590" target=_blank>.ToString();
node.Expanded = false;
treeview.Nodes.Add(node);
CreatTreeViewChildNode(dv, node, text, value, url, parentid);
}
}
/// <summary>
/// 递归绑定子节点
/// </summary>
/// <param name="dv">源DataView</param>
/// <param name="parentNode">当前节点</param>
/// <param name="text">text字段</param>
/// <param name="value">value字段</param>
/// <param name="url">url字段</param>
/// <param name="parentid">深度字段 例如parentid</param>
private static void CreatTreeViewChildNode(DataView dv, TreeNode parentNode, string text, string value, string url, string parentid)
{
dv.RowFilter = parentid + "=" + parentNode.Value;
foreach (DataRowView row in dv)
{
TreeNode replyNode = new TreeNode();
replyNode.Text = row[text].ToString();
replyNode.Value = row[value].ToString();
replyNode.NavigateUrl = row[url].ToString();
replyNode.Expanded = false;
parentNode.ChildNodes.Add(replyNode);
CreatTreeViewChildNode(dv, replyNode, text, value, url, parentid);
}
}
#endregion
#region 创建无限分级ListBox
/// <summary>
/// 创建无限分级ListBox
/// </summary>
/// <param name="ddlst">ListBox控件</param>
/// <param name="dt">源DataTable</param>
/// <param name="text">text字段</param>
/// <param name="value">value字段</param>
/// <param name="parentid">深度字段 例如parentid</param>
public static void CreateLevelListBox(ListBox ddlst, DataTable dt, string text, string value, string parentid)
{
ArrayList allItems = new ArrayList();
DataRow[] rows = dt.Select(parentid + "=0");
foreach (DataRow row in rows)
CreateLevelListBoxAssistant(dt, ref allItems, row, string.Empty, text, value, parentid);
ListItem[] items = new ListItem[allItems.Count];
allItems.CopyTo(items);
ddlst.Items.AddRange(items);
}
/// <summary>
/// 递归绑定子节点
/// </summary>
/// <param name="dt">源DataTable</param>
/// <param name="items">数组</param>
/// <param name="parentRow">当前节点</param>
/// <param name="curHeader">前缀</param>
/// <param name="text">text字段</param>
/// <param name="value">value字段</param>
/// <param name="parentid">深度字段 例如parentid</param>
private static void CreateLevelListBoxAssistant(DataTable dt, ref ArrayList items, DataRow parentRow, string curHeader, string text, string value, string parentid)
{
ListItem newItem = new ListItem(curHeader + Until.CutString(parentRow[text].ToString(), 18, true), parentRow[value].ToString());
items.Add(newItem);
DataRow[] rows = dt.Select(parentid + "=" + newItem.Value);
for (int i = 0; i < rows.Length - 1; i++)
CreateLevelListBoxAssistant(dt, ref items, rows[i], curHeader.Replace("┣", "┃").Replace("┗", "┣") + "┣", text, value, parentid);
if (rows.Length > 0)
CreateLevelListBoxAssistant(dt, ref items, rows[rows.Length - 1], curHeader.Replace("┣", "┃").Replace("┗", "┣") + "┗", text, value, parentid);
}
#endregion [/code]
原文地址:[url=http://blog.csdn.net/smartsmile2012/article/details/7998590]http://blog.csdn.net/smartsmile2012/article/details/7998590
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