arcgis server for .NET学习转载8

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最新推荐文章于 2024-07-21 03:58:55 发布

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原文链接：http://www.cnblogs.com/liuyang-1037/archive/2009/08/31/1557344.html

本文介绍如何使用 ArcGIS Server 9.2 ADF 实现动态设置资源（Resource）。通过 ASP.NET Web 应用程序，利用 CheckBox 控制 MapResource 的加载与切换，支持 ArcGIS Server Local 和 Internet 两种数据源。

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http://www.cnblogs.com/hll2008/archive/2008/08/20/1272264.html

ArcGIS.Server.9.2.DotNet自带例子分析（四、一）

目的：
1.arcgis server9.2 ADF的DynamicData，动态的设置Resource。
准备工作：
1.用ArcGis Server Manager或者ArcCatalog发布一个叫world的Map Service,并且把这个Service启动起来。
2.用ArcGis Server Manager或者ArcCatalog发布一个叫usa的Map Service,并且把这个Service启动起来。
3.找到DeveloperKit\SamplesNET\Server\Web_Applications目录下的Common_AddDynamicDataCSharp.zip。

开始：
1.新建名为AddDynamicData的ASP.NET Web应用程序。
2.在页面上添加MapResourceManager1，不做任何设置；添加Map1，MapResourceManager属性为MapResourceManager1；添加Toc1，BuddyControl属性为Map1；添加一个CheckBoxList1，添加2个ListItem分别为ArcGIS Server Local和ArcGIS Server Internet。具体的代码如下：

Code
1

@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="AddDynamicData._Default" %>
2

@ Register Assembly="ESRI.ArcGIS.ADF.Web.UI.WebControls, Version=9.2.4.1420, Culture=neutral, PublicKeyToken=8fc3cc631e44ad86"
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Namespace="ESRI.ArcGIS.ADF.Web.UI.WebControls" TagPrefix="esri" %>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
7

<html xmlns="http://www.w3.org/1999/xhtml" >
9

<head runat="server">
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<title>无标题页</title>
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</head>
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<body>
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<form id="form1" runat="server">
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<div>
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<table width="623" border="1" cellspacing="0" cellpadding="0">
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<tr>
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<td width="391">
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<esri:Toolbar ID="Toolbar1" runat="server" BuddyControlType="Map" Group="Toolbar1_Group"
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Height="50px" ToolbarItemDefaultStyle-BackColor="White" ToolbarItemDefaultStyle-Font-Names="Arial"
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ToolbarItemDefaultStyle-Font-Size="Smaller" ToolbarItemDisabledStyle-BackColor="White"
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ToolbarItemDisabledStyle-Font-Names="Arial" ToolbarItemDisabledStyle-Font-Size="Smaller"
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ToolbarItemDisabledStyle-ForeColor="Gray" ToolbarItemHoverStyle-BackColor="White"
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ToolbarItemHoverStyle-Font-Bold="True" ToolbarItemHoverStyle-Font-Italic="True"
24

ToolbarItemHoverStyle-Font-Names="Arial" ToolbarItemHoverStyle-Font-Size="Smaller"
25

ToolbarItemSelectedStyle-BackColor="White" ToolbarItemSelectedStyle-Font-Bold="True"
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ToolbarItemSelectedStyle-Font-Names="Arial" ToolbarItemSelectedStyle-Font-Size="Smaller"
27

WebResourceLocation="/aspnet_client/ESRI/WebADF/" Width="400px">
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<ToolbarItems>
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<esri:Tool ClientAction="DragRectangle" DefaultImage="esriZoomIn.gif" HoverImage="esriZoomInU.gif"
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JavaScriptFile="" Name="MapZoomIn" SelectedImage="esriZoomInD.gif" ServerActionAssembly="ESRI.ArcGIS.ADF.Web.UI.WebControls"
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ServerActionClass="ESRI.ArcGIS.ADF.Web.UI.WebControls.Tools.MapZoomIn" Text="Zoom In"
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ToolTip="Zoom In" />
33

<esri:Tool ClientAction="DragRectangle" DefaultImage="esriZoomOut.gif" HoverImage="esriZoomOutU.gif"
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JavaScriptFile="" Name="MapZoomOut" SelectedImage="esriZoomOutD.gif" ServerActionAssembly="ESRI.ArcGIS.ADF.Web.UI.WebControls"
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ServerActionClass="ESRI.ArcGIS.ADF.Web.UI.WebControls.Tools.MapZoomOut" Text="Zoom Out"
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ToolTip="Zoom Out" />
37

<esri:Tool ClientAction="DragImage" DefaultImage="esriPan.gif" HoverImage="esriPanU.gif"
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JavaScriptFile="" Name="MapPan" SelectedImage="esriPanD.gif" ServerActionAssembly="ESRI.ArcGIS.ADF.Web.UI.WebControls"
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ServerActionClass="ESRI.ArcGIS.ADF.Web.UI.WebControls.Tools.MapPan" Text="Pan"
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ToolTip="Pan" />
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<esri:Command ClientAction="" DefaultImage="esriFullExt.gif" HoverImage="esriFullExtU.gif"
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JavaScriptFile="" Name="MapFullExtent" SelectedImage="esriFullExtD.gif" ServerActionAssembly="ESRI.ArcGIS.ADF.Web.UI.WebControls"
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ServerActionClass="ESRI.ArcGIS.ADF.Web.UI.WebControls.Tools.MapFullExtent" Text="Full Extent"
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ToolTip="Full Extent" />
45

</ToolbarItems>
46

<BuddyControls>
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<esri:BuddyControl Name="Map1" />
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</BuddyControls>
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</esri:Toolbar>
50

</td>
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<td width="110"> </td>
52

</tr>
53

<tr>
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<td>
55

<esri:Map ID="Map1" runat="server" Height="429px" Width="505px" MapResourceManager="MapResourceManager1">
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</esri:Map>
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</td>
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<td valign="top">
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<esri:Toc ID="Toc1" runat="server" BuddyControl="Map1" />
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<asp:CheckBoxList ID="CheckBoxList1" runat="server" Style="left: 481px; top: 267px">
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<asp:ListItem>ArcGIS Server Local</asp:ListItem>
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<asp:ListItem>ArcGIS Server Internet</asp:ListItem>
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</asp:CheckBoxList>
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</td>
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</tr>
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</table>
67

68

<div id="BusyIndicator" style="z-index: 100; left: 17px; width: 14px; position: absolute; top: 389px; height: 15px; visibility: hidden"><img src="images/callbackActivityIndicator.gif" /></div>
69

</div>
70

<esri:MapResourceManager ID="MapResourceManager1" runat="server">
71

</esri:MapResourceManager>
72

</form>
73

</body>
74

</html>

3.通过勾选页面上的CheckBox来选择不同的MapResource,这里提供了ArcGIS Server Local和ArcGIS Server Internet的选择，没有像样例还提供ArcIMS，因为本来人没有装ArcIMS。至于ArcGIS Server Local和ArcGIS Server Internet的两种方式在前面的几篇中都有用到了，这次通过代码的方式动态的进行设置。
4.接下来页面切换到代码视图，老样子仍旧需要实现ICallbackEventHandler。在Page_Load事件中添加如下代码：

// 客户端脚本段
2

private string m_ADFCallbackFunctionString;
3

public string ADFCallbackFunctionString
5

{
6

get
7

{
8

return m_ADFCallbackFunctionString;
9

}
10

set
11

{
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m_ADFCallbackFunctionString = value;
13

}
14

}
15

protected void Page_Load( object sender, EventArgs e)
17

{
18

//给CheckBox添加点击js事件
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foreach (ListItem checkBox in CheckBoxList1.Items)
20

{
21

checkBox.Attributes.Add("onclick", "ChangeCheckContext(this)");
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}
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//生成客户端脚本段
24

m_ADFCallbackFunctionString = Page.ClientScript.GetCallbackEventReference(this, "message", "processCallbackResult", "context", "postBackError", true);
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}
26

5.在上面的代码中给CheckBox添加了ChangeCheckContext(this)脚本函数，所以需要在页面中添加这个函数，切换到html视图然后在最后添加如下的js代码：

.
2

< script language ="javascript" type ="text/javascript" >

function ChangeCheckContext(checkbox)
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{
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//显示载入中的小图标
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document.getElementById('BusyIndicator').style.visibility = 'visible';
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//获取checkbox的显示文
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var val = checkbox.nextSibling.innerText;
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var ischecked = checkbox.checked;
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context = "cb";
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var message = "changeresource,";
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message += val + ',' + ischecked;
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//执行回调请求服务端
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<%= ADFCallbackFunctionString%>
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}
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</ script >
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</ form >

６.接下在服务端实现对 ChangeCheckContext(this)脚本函数请求处理，主要的GetCallbackResult和RaiseCallbackEvent的两个方法，具体的代码和说明如下：

// 处理结果返回给客户端
2

public string GetCallbackResult()
3

{
4

return m_CallbackResponse;
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}
6

// 处理客户端请求
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public void RaiseCallbackEvent( string eventArgs)
8

{
9

//分割请求字符串
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char[] charToParse =

{ ',' };
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string[] messages = eventArgs.Split(charToParse);
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if (eventArgs.Contains("changeresource"))
14

{
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//SourceType
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string dataSourceType = messages[1];
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//CheckBox是否选中
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bool isChecked = Boolean.Parse(messages[2]);
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//根据请求类型不同用不同的Resource
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switch (dataSourceType)
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{
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case "ArcGIS Server Local":
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m_ResourceName = AGSLocalName;
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break;
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case "ArcGIS Server Internet":
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m_ResourceName = AGSInternetName;
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break;
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default:
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break;
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}
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//更换Resource
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MapResourceChange(isChecked);
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}
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}
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// 更换Resource
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void MapResourceChange( bool isChecked)
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{
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//获取当前MapResourceManager1的ResourceItems
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ESRI.ArcGIS.ADF.Web.UI.WebControls.GISResourceItemCollection<ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem> mapResourceItemCollection =MapResourceManager1.ResourceItems;
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ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem mapResourceItem = null;
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//获取当前MapResourceManager1的ResourceItems的数
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int mapResourceCount = mapResourceItemCollection.Count;
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if (!isChecked)
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{
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//如果未勾选就删除未勾选的ResourceItem
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mapResourceItem = mapResourceItemCollection.Find(m_ResourceName);
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mapResourceItemCollection.Remove(mapResourceItem);
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}
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else
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{
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//实例化ResourceItem
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mapResourceItem = new ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem();
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ESRI.ArcGIS.ADF.Web.UI.WebControls.GISResourceItemDefinition definition =new ESRI.ArcGIS.ADF.Web.UI.WebControls.GISResourceItemDefinition();
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switch (m_ResourceName)
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{
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case (AGSLocalName)://设置本地Resource名称
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//Name
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mapResourceItem.Name = AGSLocalName;
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//Data Source
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definition.DataSourceDefinition = "jh-53a435fbc0e8";
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//Type
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definition.DataSourceType = "ArcGIS Server Local";
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//Resource
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definition.ResourceDefinition = "Layers@usa";
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break;
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case (AGSInternetName)://设置Internet Resource名称
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//Name
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mapResourceItem.Name = AGSInternetName;
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//Data Source
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definition.DataSourceDefinition = "http://jh-53a435fbc0e8/arcgis/services/";
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//Type
74

definition.DataSourceType = "ArcGIS Server Internet";
75

//Identity
76

Identity id = new Identity("Administrator", "zsycl1231", "");
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definition.Identity = id.ToString();
78

//Resource
79

definition.ResourceDefinition = "(default)@world";
80

break;
81

}
82

definition.DataSourceShared = true;
84

mapResourceItem.Parent = MapResourceManager1;
85

mapResourceItem.Definition = definition;
86

//mapResourceItem的展示设置
88

ESRI.ArcGIS.ADF.Web.DisplaySettings displaySettings = new ESRI.ArcGIS.ADF.Web.DisplaySettings();
89

displaySettings.Transparency = 50.0F;
90

displaySettings.Visible = true;
91

displaySettings.ImageDescriptor.TransparentColor = System.Drawing.Color.White;
92

displaySettings.ImageDescriptor.TransparentBackground = true;
93

mapResourceItem.DisplaySettings = displaySettings;
94

//把上面的MapResourceItem添加到MapResourceManager1
96

MapResourceManager1.ResourceItems.Insert(0, mapResourceItem);
97

//建立MapResource根据MapResourceManager1
99

ESRI.ArcGIS.ADF.Web.DataSources.IMapResource mapResource =MapResourceManager1.CreateResource(mapResourceItem);
100

101

if (mapResourceCount < 1)
102

{
103

Map1.PrimaryMapResource = mapResourceItem.Name;
104

//初始化
105

Map1.InitializeFunctionalities();
106

Map1.InitializeTileFunctionalities();
107

}
108

else
109

{
110

111

// 刷新地图显示
112

if (Map1.ImageBlendingMode == ESRI.ArcGIS.ADF.Web.UI.WebControls.ImageBlendingMode.WebTier)
113

{
114

Map1.Refresh();
115

}
116

else
117

{
118

Map1.RefreshResource(mapResourceItem.Name);
119

}
120

}
121

}
122

123

if (mapResourceCount < 1)
124

{
125

Map1.Extent = Map1.Extent.Expand(0.1);
126

}
127

//刷新Toc1
128

Toc1.Refresh();
129

ESRI.ArcGIS.ADF.Web.UI.WebControls.CallbackResult tocCallbackResult = RefreshControlHtml(Toc1);
130

Map1.CallbackResults.Add(tocCallbackResult);
131

132

// Convert the Map's collection of callback results to a string
133

m_CallbackResponse = Map1.CallbackResults.ToString();
134

}
135

136

private ESRI.ArcGIS.ADF.Web.UI.WebControls.CallbackResult RefreshControlHtml(Control control)
137

{
138

StringWriter stringWriter = new StringWriter();
139

HtmlTextWriter writer = new HtmlTextWriter(stringWriter);
140

control.RenderControl(writer);
141

string htmlContent = stringWriter.ToString();
142

stringWriter.Close();
143

return new ESRI.ArcGIS.ADF.Web.UI.WebControls.CallbackResult(control, "content", htmlContent);
144

}
145

７.这个例子相对比较简单具体实现看代码注释了。运行看效果。

转载于:https://www.cnblogs.com/liuyang-1037/archive/2009/08/31/1557344.html