网上关于Treeview的代码虽然多 但是都是很乱 实用性和正确性也不是很好 只好自己写一套了,时间比较紧张 性能可能还需调整
以用户组织的一个实际例子来讲诉Treeview的用法吧
组织表结构:
用户组织表结构:
前台界面aspx
<form id="Form1" runat="server">
<table> <tr>
<td class="contentTD">
<div id="MyTreeDiv">
<asp:TreeView ShowCheckBoxes="All" ID="MyTreeView" ImageSet="Contacts" runat="server" ExpandDepth="" Width="400px" BorderStyle="Solid" BorderWidth="1px">
</asp:TreeView>
</div>
</td>
</tr>
<tr> <td class="content">
<asp:Button ID="btnSubmit" runat="server" Text="提 交" CssClass="dotNetButton" OnClick="btnSubmit_Click" /><input type="button" class="glbutton" onclick="history.go(-1);"
value="返 回" />
<asp:ListBox ID="ListBox1" Visible="false" runat="server"></asp:ListBox>
</td>
</tr>
</table>
</form>
js控制父节点选中子节点自动选中
<script>
function Davidovitz_HandleCheckbox() {
var element = event.srcElement;
if (element.tagName == "INPUT" && element.type == "checkbox") {
var checkedState = element.checked;
while (element.tagName != "TABLE") // Get wrapping table
{
element = element.parentElement;
} Davidovitz_UnCheckParents(element); // Uncheck all parents element = element.nextSibling; if (element == null) // If no childrens than exit
return; var childTables = element.getElementsByTagName("TABLE");
for (var tableIndex = ; tableIndex < childTables.length; tableIndex++) {
Davidovitz_CheckTable(childTables[tableIndex], checkedState);
}
}
} // Uncheck the parents of the given table, Can remove the recurse (redundant)
function Davidovitz_UnCheckParents(table) {
if (table == null || table.rows[].cells.length == ) // This is the root
{
return;
}
var parentTable = table.parentElement.previousSibling;
Davidovitz_CheckTable(parentTable, false);
Davidovitz_UnCheckParents(parentTable);
} // Handle the set of checkbox checked state
function Davidovitz_CheckTable(table, checked) {
var checkboxIndex = table.rows[].cells.length - ;
var cell = table.rows[].cells[checkboxIndex];
var checkboxes = cell.getElementsByTagName("INPUT");
if (checkboxes.length == ) {
checkboxes[].checked = checked;
}
} </script>
后台代码.cs
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.MyTreeView.Attributes.Add("onclick", "Davidovitz_HandleCheckbox()"); bind();
}
}
//数据绑定
private void bind()
{
this.MyTreeView.Nodes.Clear();
//读取组织列表
DataTable dt = new T_GroupManager().GetDataTableBySQL(" and FState=1 and FCreatorID = " + Request.QueryString["id"]); this.ViewState["ds"] = dt;
//调用递归函数，完成树形结构的生成
AddTree(, (TreeNode)null); if (Request.QueryString["id"] != null)
{
//根据用户ID查找对应的用户组织结构,勾上
List<T_UserGroup> list = new T_UserGroupManager().GetAllBySQL(" and FUSerID=" + Request.QueryString["id"]).ToList();
ViewState["UserGroup"] = list;
foreach (T_UserGroup item in list)
{
for (int i = ; i < this.MyTreeView.Nodes.Count; i++)
{
if (MyTreeView.Nodes[i].ChildNodes.Count > ) //判断是否还有子节点
{
SetNode(MyTreeView.Nodes[i]);
}
if (MyTreeView.Nodes[i].Value == item.FGroupID.ToString()) //判断是否被选中
{
MyTreeView.Nodes[i].Checked = true;
}
}
}
}
}
//查找子节点
public void SetNode(TreeNode node)
{
if (Request.QueryString["id"] != null)
{
//根据ID查找对应的组织结构,勾上
List<T_UserGroup> list = ViewState["UserGroup"] as List<T_UserGroup>;
foreach (T_UserGroup item in list)
{
for (int i = ; i < node.ChildNodes.Count; i++)
{
if (node.ChildNodes[i].ChildNodes.Count > ) //判断是否还有子节点
{
SetNode(node.ChildNodes[i]); //递归查找
}
if (node.ChildNodes[i].Value == item.FGroupID.ToString()) //判断是否被选中
{
node.ChildNodes[i].Checked = true;
}
}
}
}
} //递归添加树的节点
public void AddTree(int ParentID, TreeNode pNode)
{
DataTable ds = (DataTable)this.ViewState["ds"];
DataView dvTree = new DataView(ds);
//过滤ParentID,得到当前的所有子节点
dvTree.RowFilter = "[FParentUserID] = " + ParentID; foreach (DataRowView Row in dvTree)
{
TreeNode Node = new TreeNode();
if (pNode == null)
{
//添加根节点
Node.Text = Row["FGroupName"].ToString();
Node.Value = Row["PID"].ToString();
this.MyTreeView.Nodes.Add(Node);
Node.Expanded = true;
//再次递归
AddTree(Int32.Parse(Row["PID"].ToString()), Node);
}
else
{
//添加当前节点的子节点
Node.Text = Row["FGroupName"].ToString();
Node.Value = Row["PID"].ToString();
pNode.ChildNodes.Add(Node);
Node.Expanded = true;
//再次递归
AddTree(Int32.Parse(Row["PID"].ToString()), Node);
}
}
}
/// <summary>
/// 保存
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void btnSubmit_Click(object sender, EventArgs e)
{
for (int i = ; i < MyTreeView.Nodes.Count; i++)
{
if (MyTreeView.Nodes[i].ChildNodes.Count > ) //判断是否还有子节点
{
GetNode(MyTreeView.Nodes[i]);
}
if (MyTreeView.Nodes[i].Checked == true) //判断是否被选中
{
string s = MyTreeView.Nodes[i].Value.ToString();
ListBox1.Items.Add(s);
}
}
T_UserGroupManager gm = new T_UserGroupManager();
//清空
List<T_UserGroup> list = ViewState["UserGroup"] as List<T_UserGroup>;
foreach (T_UserGroup item in list)
{
gm.DeleteByPID(item.PID);
}
int id = Convert.ToInt32(Request.QueryString["id"]);
//保存
foreach (var item in ListBox1.Items)
{
T_UserGroup ug = new T_UserGroup();
ug.FUSerID = id;
ug.FGroupID = Convert.ToInt32((item as ListItem).Value);
ug.FState = ;
gm.Add(ug);
}
ShowJS("<script>alert('保存成功！');location = 'UserGroupInfo.aspx'</script>");
}
//获取选中节点
public void GetNode(TreeNode node)
{
for (int i = ; i < node.ChildNodes.Count; i++)
{
if (node.ChildNodes[i].ChildNodes.Count > ) //判断是否还有子节点
{
GetNode(node.ChildNodes[i]); //递归查找
}
if (node.ChildNodes[i].Checked == true) //判断是否被选中
{
string s = node.ChildNodes[i].Value.ToString();
ListBox1.Items.Add(s);
}
}
}
}
基本上面就是全部代码了,实现了Treeview的读取和根据勾选保存,根据用户配置设置Treeview的勾选项
用了好一段时间才整理出来的,要转载的童鞋记得保留我的链接哦http://www.cnblogs.com/linyijia/p/3497503.html