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資源簡介

在進行數據分析時，通常需要通過緩沖區進行查詢。本范例示范如何通過創建緩沖區對數據進行查詢。

資源截圖

代碼片段和文件信息 

using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?SuperMap.Data;
using?SuperMap.Mapping;
using?SuperMap.UI;
using?SuperMap.Analyst.SpatialAnalyst;
using?System.Drawing;
using?System.Windows.Forms;

namespace?BufferQuery
{
???public?class?Buffer
????{
????????private?Workspace?m_workspace;
????????private?MapControl?m_mapControl;
????????public?GeoRegion?bufferRegion;
????????private?Trackinglayer?trackinglayer;
????????private?Point2D?mpoint;
????????private?Recordset?mRecordset;
????????private?layer?layer;
????????private?Point2Ds?point2Ds;?
???????public?Buffer（Workspace?workspace?MapControl?mapControl）
???????{
???????????m_workspace?=?workspace;
???????????m_mapControl?=?mapControl;
???????????trackinglayer?=?m_mapControl.Map.Trackinglayer;
???????????point2Ds?=?new?Point2Ds（）;
???????}
???????///?
???????///?創建緩沖區
???????///?
???????///?
???????public?void?CreateRegion（）
???????{
???????????GeoCircle?Circle?=?new?GeoCircle（point2Ds[0]point2Ds[1]）;
???????????Geostyle?style?=?new?Geostyle（）;
???????????style.MarkerSize?=?new?Size2D（4?4）;
???????????style.FillOpaqueRate?=?50;
???????????style.FillSymbolID?=?36;
???????????style.LineWidth?=?0.5;
???????????style.FillForeColor?=?Color.AliceBlue;
???????????style.LineColor?=?Color.Blue;
???????????bufferRegion?=?Circle.ConvertToRegion（50）;
???????????bufferRegion.style?=?style;
???????????int?lineIndex?=?trackinglayer.IndexOf（“region“）;
???????????if?（lineIndex?!=?-1）
???????????{
???????????????trackinglayer.Remove（lineIndex）;
???????????}
???????????trackinglayer.Add（bufferRegion?“region“）;
???????????m_mapControl.Action?=?SuperMap.UI.Action.Pan;
???????????m_mapControl.Map.Refresh（）;
???????}
???????///?
???????///?清除直徑端點
???????///?
???????public?void?point_Clear（）
???????{
???????????point2Ds.Clear（）;
???????}
???????///?
???????///?范圍查詢
???????///?
???????///?
???????public?void?RangeQuery（）
???????{

???????????CreateRegion（）;
????????????layer?=?GetlayerByCaption（“School@Changchun“）;
???????????QueryParameter?mQueryParameter?=?new?QueryParameter（）;
???????????mQueryParameter.SpatialQueryobject?=?bufferRegion;
???????????mQueryParameter.SpatialQueryMode?=?SpatialQueryMode.Contain;
???????????mQueryParameter.HasGeometry?=?true;
???????????mQueryParameter.CursorType?=?CursorType.Static;
???????????DatasetVector?mDatasetVector?=?layer.Dataset?as?DatasetVector;
???????????mRecordset?=?mDatasetVector.Query（mQueryParameter）;
???????????layer.Selection.FromRecordset（mRecordset）;
???????????m_mapControl.Map.EnsureVisible（bufferRegion）;
???????????layer.Selection.style.LineColor?=?Color.Red;
???????}
???????///?
???????///?返回查詢圖層
???????///?
???????///?yerCaption“>
???????///?
???????private?La

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????17920??2016-12-30?10:12??BufferQuery\BufferQuery\bin\Debug\BufferQuery.exe

?????文件??????32256??2016-12-30?10:12??BufferQuery\BufferQuery\bin\Debug\BufferQuery.pdb

?????文件??????22984??2017-01-04?09:54??BufferQuery\BufferQuery\bin\Debug\BufferQuery.vshost.exe

?????文件????????490??2015-11-13?10:24??BufferQuery\BufferQuery\bin\Debug\BufferQuery.vshost.exe.manifest

?????文件????1765888??2016-09-27?08:28??BufferQuery\BufferQuery\bin\Debug\SuperMap.Analyst.SpatialAnalyst.dll

?????文件?????394091??2016-09-27?08:31??BufferQuery\BufferQuery\bin\Debug\SuperMap.Analyst.SpatialAnalyst.xml

?????文件?????263168??2016-09-27?08:28??BufferQuery\BufferQuery\bin\Debug\SuperMap.Analyst.SpatialStatistics.dll

?????文件??????33751??2016-09-27?08:31??BufferQuery\BufferQuery\bin\Debug\SuperMap.Analyst.SpatialStatistics.xml

?????文件????1378816??2016-09-27?08:28??BufferQuery\BufferQuery\bin\Debug\SuperMap.Chart.dll

?????文件?????131190??2016-09-27?08:31??BufferQuery\BufferQuery\bin\Debug\SuperMap.Chart.xml

?????文件????1091072??2016-09-27?08:28??BufferQuery\BufferQuery\bin\Debug\SuperMap.Data.Conversion.dll

?????文件?????359563??2016-09-27?08:31??BufferQuery\BufferQuery\bin\Debug\SuperMap.Data.Conversion.xml

?????文件???11817984??2016-09-27?08:28??BufferQuery\BufferQuery\bin\Debug\SuperMap.Data.dll

?????文件????1668933??2016-09-27?08:31??BufferQuery\BufferQuery\bin\Debug\SuperMap.Data.xml

?????文件????4305920??2016-09-27?08:28??BufferQuery\BufferQuery\bin\Debug\SuperMap.Layout.dll

?????文件?????107482??2016-09-27?08:31??BufferQuery\BufferQuery\bin\Debug\SuperMap.Layout.xml

?????文件????5787648??2016-09-27?08:28??BufferQuery\BufferQuery\bin\Debug\SuperMap.Mapping.dll

?????文件?????502149??2016-09-27?08:31??BufferQuery\BufferQuery\bin\Debug\SuperMap.Mapping.xml

?????文件????8438784??2016-09-27?08:28??BufferQuery\BufferQuery\bin\Debug\SuperMap.Realspace.dll

?????文件?????399405??2016-09-27?08:31??BufferQuery\BufferQuery\bin\Debug\SuperMap.Realspace.xml

?????文件????4397056??2016-09-27?08:28??BufferQuery\BufferQuery\bin\Debug\SuperMap.UI.Controls.dll

?????文件?????106770??2016-09-27?08:31??BufferQuery\BufferQuery\bin\Debug\SuperMap.UI.Controls.xml

?????文件?????174592??2016-09-27?08:28??BufferQuery\BufferQuery\bin\Debug\zh-CN\SuperMap.Data.resources.dll

?????文件???????4942??2016-12-30?10:12??BufferQuery\BufferQuery\Buffer.cs

?????文件???????4482??2016-12-28?17:16??BufferQuery\BufferQuery\BufferQuery.csproj

?????文件???????4338??2016-12-30?10:12??BufferQuery\BufferQuery\Form1.cs

?????文件???????5623??2016-12-30?09:54??BufferQuery\BufferQuery\Form1.Designer.cs

?????文件??????10630??2016-12-30?09:54??BufferQuery\BufferQuery\Form1.resx

?????文件???????3622??2016-12-30?09:54??BufferQuery\BufferQuery\obj\Debug\BufferQuery.BufferQuery.resources

?????文件???????1887??2017-01-04?09:54??BufferQuery\BufferQuery\obj\Debug\BufferQuery.csproj.FileListAbsolute.txt

............此處省略32個文件信息

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