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
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：
1
//
客户端脚本段
2
private
string
m_ADFCallbackFunctionString;
3
4
public
string
ADFCallbackFunctionString
5
{
6
get
7
{
8 return m_ADFCallbackFunctionString;
9
}
10 set
11 {
12 m_ADFCallbackFunctionString = value;
13 }
14
}
15
16
protected
void
Page_Load(
object
sender, EventArgs e)
17
{
18 //给CheckBox添加点击js事件
19 foreach (ListItem checkBox in CheckBoxList1.Items)
20 {
21 checkBox.Attributes.Add("onclick", "ChangeCheckContext(this)");
22 }
23 //生成客户端脚本段
24 m_ADFCallbackFunctionString = Page.ClientScript.GetCallbackEventReference(this, "message", "processCallbackResult", "context", "postBackError", true);
25 }
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：
//
客户端脚本段
2
private
string
m_ADFCallbackFunctionString;3
4
public
string
ADFCallbackFunctionString5
{6
get7
{
8
return m_ADFCallbackFunctionString;9
}10
set11
{12
m_ADFCallbackFunctionString = value;13
}14
}
15
16
protected
void
Page_Load(
object
sender, EventArgs e)17
{18
//给CheckBox添加点击js事件19
foreach (ListItem checkBox in CheckBoxList1.Items)20
{21
checkBox.Attributes.Add("onclick", "ChangeCheckContext(this)");22
}23
//生成客户端脚本段24
m_ADFCallbackFunctionString = Page.ClientScript.GetCallbackEventReference(this, "message", "processCallbackResult", "context", "postBackError", true);25
}
26
1
.
2
<
script
language
="javascript"
type
="text/javascript"
>
3 function ChangeCheckContext(checkbox)
4 {
5 //显示载入中的小图标
6 document.getElementById('BusyIndicator').style.visibility = 'visible';
7 //获取checkbox的显示文
8 var val = checkbox.nextSibling.innerText;
9 var ischecked = checkbox.checked;
10 context = "cb";
11 var message = "changeresource,";
12 message += val + ',' + ischecked;
13 //执行回调请求服务端
14 <%= ADFCallbackFunctionString%>
15 }
16
</
script
>
17
</
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：
.2
<
script
language
="javascript"
type
="text/javascript"
>
3
function ChangeCheckContext(checkbox)4
{ 5
//显示载入中的小图标 6
document.getElementById('BusyIndicator').style.visibility = 'visible';7
//获取checkbox的显示文8
var val = checkbox.nextSibling.innerText;9
var ischecked = checkbox.checked;10
context = "cb";11
var message = "changeresource,";12
message += val + ',' + ischecked; 13
//执行回调请求服务端 14
<%= ADFCallbackFunctionString%> 15
} 16
</
script
>
17
</
form
>
1
//
处理结果返回给客户端
2
public
string
GetCallbackResult()
3
{
4 return m_CallbackResponse;
5 }
6
//
处理客户端请求
7
public
void
RaiseCallbackEvent(
string
eventArgs)
8
{
9 //分割请求字符串
10 char[] charToParse = { ',' };
11 string[] messages = eventArgs.Split(charToParse);
12
13 if (eventArgs.Contains("changeresource"))
14 {
15 //SourceType
16 string dataSourceType = messages[1];
17 //CheckBox是否选中
18 bool isChecked = Boolean.Parse(messages[2]);
19 //根据请求类型不同用不同的Resource
20 switch (dataSourceType)
21 {
22 case "ArcGIS Server Local":
23 m_ResourceName = AGSLocalName;
24 break;
25 case "ArcGIS Server Internet":
26 m_ResourceName = AGSInternetName;
27 break;
28 default:
29 break;
30 }
31 //更换Resource
32 MapResourceChange(isChecked);
33 }
34 }
35
//
更换Resource
36
void
MapResourceChange(
bool
isChecked)
37
{
38 //获取当前MapResourceManager1的ResourceItems
39 ESRI.ArcGIS.ADF.Web.UI.WebControls.GISResourceItemCollection<ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem> mapResourceItemCollection =MapResourceManager1.ResourceItems;
40
41 ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem mapResourceItem = null;
42 //获取当前MapResourceManager1的ResourceItems的数
43 int mapResourceCount = mapResourceItemCollection.Count;
44 if (!isChecked)
45 {
46 //如果未勾选就删除未勾选的ResourceItem
47 mapResourceItem = mapResourceItemCollection.Find(m_ResourceName);
48 mapResourceItemCollection.Remove(mapResourceItem);
49 }
50 else
51 {
52 //实例化ResourceItem
53 mapResourceItem = new ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem();
54 ESRI.ArcGIS.ADF.Web.UI.WebControls.GISResourceItemDefinition definition =new ESRI.ArcGIS.ADF.Web.UI.WebControls.GISResourceItemDefinition();
55
56 switch (m_ResourceName)
57 {
58 case (AGSLocalName)://设置本地Resource名称
59 //Name
60 mapResourceItem.Name = AGSLocalName;
61 //Data Source
62 definition.DataSourceDefinition = "jh-53a435fbc0e8";
63 //Type
64 definition.DataSourceType = "ArcGIS Server Local";
65 //Resource
66 definition.ResourceDefinition = "Layers@usa";
67 break;
68 case (AGSInternetName)://设置Internet Resource名称
69 //Name
70 mapResourceItem.Name = AGSInternetName;
71 //Data Source
72 definition.DataSourceDefinition = "http://jh-53a435fbc0e8/arcgis/services/";
73 //Type
74 definition.DataSourceType = "ArcGIS Server Internet";
75 //Identity
76 Identity id = new Identity("Administrator", "zsycl1231", "");
77 definition.Identity = id.ToString();
78 //Resource
79 definition.ResourceDefinition = "(default)@world";
80 break;
81 }
82
83 definition.DataSourceShared = true;
84 mapResourceItem.Parent = MapResourceManager1;
85 mapResourceItem.Definition = definition;
86
87 //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
95 //把上面的MapResourceItem添加到MapResourceManager1
96 MapResourceManager1.ResourceItems.Insert(0, mapResourceItem);
97
98 //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。
//
处理结果返回给客户端
2
public
string
GetCallbackResult()3
{4
return m_CallbackResponse;5
}
6
//
处理客户端请求
7
public
void
RaiseCallbackEvent(
string
eventArgs)8
{9
//分割请求字符串10
char[] charToParse = { ',' };11
string[] messages = eventArgs.Split(charToParse);12
13
if (eventArgs.Contains("changeresource"))14
{15
//SourceType16
string dataSourceType = messages[1];17
//CheckBox是否选中18
bool isChecked = Boolean.Parse(messages[2]);19
//根据请求类型不同用不同的Resource20
switch (dataSourceType)21
{22
case "ArcGIS Server Local":23
m_ResourceName = AGSLocalName;24
break;25
case "ArcGIS Server Internet":26
m_ResourceName = AGSInternetName;27
break;28
default:29
break;30
}31
//更换Resource32
MapResourceChange(isChecked);33
}34
}
35
//
更换Resource
36
void
MapResourceChange(
bool
isChecked)37
{38
//获取当前MapResourceManager1的ResourceItems39
ESRI.ArcGIS.ADF.Web.UI.WebControls.GISResourceItemCollection<ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem> mapResourceItemCollection =MapResourceManager1.ResourceItems;40
41
ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem mapResourceItem = null;42
//获取当前MapResourceManager1的ResourceItems的数43
int mapResourceCount = mapResourceItemCollection.Count;44
if (!isChecked)45
{46
//如果未勾选就删除未勾选的ResourceItem47
mapResourceItem = mapResourceItemCollection.Find(m_ResourceName);48
mapResourceItemCollection.Remove(mapResourceItem);49
}50
else51
{52
//实例化ResourceItem53
mapResourceItem = new ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem();54
ESRI.ArcGIS.ADF.Web.UI.WebControls.GISResourceItemDefinition definition =new ESRI.ArcGIS.ADF.Web.UI.WebControls.GISResourceItemDefinition();55
56
switch (m_ResourceName)57
{58
case (AGSLocalName)://设置本地Resource名称59
//Name60
mapResourceItem.Name = AGSLocalName;61
//Data Source62
definition.DataSourceDefinition = "jh-53a435fbc0e8";63
//Type64
definition.DataSourceType = "ArcGIS Server Local";65
//Resource66
definition.ResourceDefinition = "Layers@usa";67
break;68
case (AGSInternetName)://设置Internet Resource名称69
//Name70
mapResourceItem.Name = AGSInternetName;71
//Data Source72
definition.DataSourceDefinition = "http://jh-53a435fbc0e8/arcgis/services/";73
//Type74
definition.DataSourceType = "ArcGIS Server Internet";75
//Identity76
Identity id = new Identity("Administrator", "zsycl1231", "");77
definition.Identity = id.ToString();78
//Resource79
definition.ResourceDefinition = "(default)@world";80
break;81
}82
83
definition.DataSourceShared = true;84
mapResourceItem.Parent = MapResourceManager1;85
mapResourceItem.Definition = definition;86
87
//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
95
//把上面的MapResourceItem添加到MapResourceManager196
MapResourceManager1.ResourceItems.Insert(0, mapResourceItem);97
98
//建立MapResource根据MapResourceManager199
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
else109
{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
else117
{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Toc1128
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
