用showModalDialog弹出窗口和UltraWebTree树实现的行政区域（省,市,县）选择
行政区域的省,市,县选择一般多用DropDownlist的三级联动就可以了，技术经理说那个不是很好，对于当前的项目。
要做成showModalDialog弹出窗口根据树展开进行选择，然后返回行政区域的全名和地区代码。
实现过程：
新建一个用户控件DistrictSelect.ascx；cs没有代码的
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<%@ Control Language="C#" AutoEventWireup="true" CodeFile="DistrictSelect.ascx.cs"2
Inherits="Common_DistrictSelect" %>3
4
<script type="text/javascript" language="javascript">5
function openwin()6
{
7
var str=window.showModalDialog('district.aspx','行政区域选择','dialogHeight:800px;dialogWidth:600px;status:yes;scroll:yes;help:no');8
//打开弹出窗口，str用来取district.aspx的返回值9
districtName=str.split(","); 10
document.getElementById("<%=txt_district.ClientID%>").value=districtName[0];//行政区域全程11
document.getElementById("<%=hf_district.ClientID%>").value=districtName[1];//行政区域代码12
}13
</script>14
15
<div>16
<asp:TextBox ID="txt_district" runat="server"></asp:TextBox>17
<asp:Button runat="server" ID="btn_select" Text="选择" OnClientClick="openwin()" />18
<asp:HiddenField ID="hf_district" runat="server" />19
</div>20
1
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="district.aspx.cs" Inherits="district" %>2
3
<%@ Register Assembly="Infragistics2.WebUI.UltraWebNavigator.v7.1, Version=7.1.20071.40, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb"4
Namespace="Infragistics.WebUI.UltraWebNavigator" TagPrefix="ignav" %>5
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">6
<html xmlns="http://www.w3.org/1999/xhtml">7
<head runat="server">8
<title>无标题页</title>9
<script type="text/javascript" language="javascript">10
{11
function getTreeNode()12
{ 
13
var name=document.getElementById('btn_search').value; 14
15
if(name=="查找") //如果按钮的值 查找 查询下级节点16
{17
18
Anthem_InvokePageMethod('findTreeNode',[document.getElementById('txt_condition').value],showResult); 19
} 20
else //判断txt_condition是否为空，不为空将值返回父窗口，关闭当前窗口21
{22
23
var district=document.getElementById('txt_condition').value;24
if(district.Length!=0)25
{ //alert(district+document.getElementById('hf_districtCode').value)26
//返回行政名称和代码window.returnValue 27
window.returnValue=district+","+document.getElementById('hf_districtCode').value;28
window.close();29
} 30
else31
{32
alert('请选择行政区域');33
}34
} 35
}36
37
function showResult(result)38
{39
40
var str=result.value.split(","); 41
if(str[0]=="0")42
{ 43
alert("找不到匹配的行政区,请重新输入!");44
}45
else46
{47
var txt=document.getElementById('txt_condition');48
txt.value=str[0]; 49
txt.readonly=true;50
document.getElementById("hf_districtCode").value=str[1];51
document.getElementById('btn_search').value="确定";52
}53
}54
55
56
}57
</script>58
59
</head>60
<body>61
<form id="form1" runat="server">62
<div>63
<span style=" font-size:12pt ">请选择行政区域</span> 64
<div style="width: 420px; height: 40px;" align="center">65
<input id="txt_condition" type="text" runat="server" style="width:300px" />66
<input id="btn_search" type="button" value="查找" onclick="getTreeNode()" runat="server" />67
<asp:HiddenField ID="hf_districtCode" runat="server" />68
</div>69
70
</div>71
<div style="width: 150px; font-size: 10pt" id="province">72
<ignav:UltraWebTree ID="treeDistrict" runat="server" DefaultImage="" HoverClass=""73
Indentation="20" Height="100%" Width="100%" OnNodeClicked="treeDistrict_OnNodeClicked">74
</ignav:UltraWebTree>75
</div>76
</form>77
</body>78
</html>79
1
public partial class district : System.Web.UI.Page2
{3
protected void Page_Load(object sender, EventArgs e)4
{5
Anthem.Manager.Register(this);//anthemManager注册6
if (!Page.IsPostBack)7
{8
District[] dis = BaseDistrictMng.GetAllProvinces();9
foreach (District province in dis)//加载省级行政单位10
{11
Node rootNode = new Node();12
rootNode.DataKey = province.DistrictCode;13
rootNode.Text = province.DistrictName;14
rootNode.ToolTip = province.DistrictName;15
rootNode.ImageUrl = "~/images/Grade.gif";16
rootNode.ShowExpand = true;17
rootNode.SelectedImageUrl = "~/images/icon_ok.gif"; 18
treeDistrict.Nodes.Add(rootNode);19
}20
}21
//不重新弹出，这个很重要，否则点击树结点会在showModalDialog上弹出一个district.aspx页面22
Response.Write("<base target=_self />");23
24
}25
26
protected void treeDistrict_OnNodeClicked(object sender, WebTreeNodeEventArgs e)27
{28
string districtcode = SelectedNode.DataKey.ToString(); ;29
string districtname = SelectedNode.Text;30
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District[] dis = BaseDistrictMng.GetLowerDistricts(districtcode);32
if (dis != null && dis.Length != 0)//有下级填充节点33
{34
fillTreeNode(SelectedNode, dis);35
this.treeDistrict.SelectedNode.Expand(true);36
}37
else//没有下级，取值38
{39
District dd=BaseDistrictMng.GetDistrictById(districtcode);40
string allName = dd.ParentDistrict.ParentDistrict.DistrictName + dd.ParentDistrict.DistrictName +dd.DistrictName;41
this.txt_condition.Value = allName;42
this.btn_search.Value = "确定";43
this.hf_districtCode.Value = districtcode;44
45
}46
}47
//填充子节点48
protected void fillTreeNode(Node rootNode, District[] dis)49
{50
foreach (District var in dis)51
{52
Node node = new Node();53
node.DataKey = var.DistrictCode;54
node.Text = var.DistrictName;55
node.ToolTip = var.DistrictName;56
node.ImageUrl = "~/images/Grade.gif";57
node.SelectedImageUrl = "~/images/icon_ok.gif";58
rootNode.Nodes.Add(node);59
}60
rootNode.ShowExpand = true;61
}62
[Anthem.Method]//寻找子节点，实现查询功能63
public string findTreeNode(string districtName)64
{65
District[] disList = BaseDistrictMng.GetDistrictList();66
District dis = new District();67
bool isFind = false;68
foreach (District var in disList)69
{70
if (var.DistrictName == districtName)71
{72
isFind = true;73
dis = var;74
}75
}76
if (isFind)77
{78
string allName = dis.ParentDistrict.ParentDistrict.DistrictName + dis.ParentDistrict.DistrictName + dis.DistrictName; 79
return allName+","+dis.DistrictCode;80
}81
else return "0";82
}83
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/// <summary>85
/// 选中节点86
/// </summary>87
public Node SelectedNode88
{89
get { return treeDistrict.SelectedNode; }90
}91
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}
确定之后关闭 showModalDialog窗口将选择值返回到DistrictSelect.ascx用户控件，对于上面完成的 distric.aspx 中 UltraWebTree加载市县级节点时时会刷新的，对于点击县级节点返回行政区域全称和查询功能是不会刷新的，这里感觉就是Anthem的一个不太好的地方，一定要由客户端发起事件，对于UltraWebTree找不到客户端nodeclick也不知如何注册。不过技术经理是很推崇的，呵呵，因为《Ajax与.Net2.0高级程序设计》这本书是他翻译的，里面主要讲的就是Anthem。