第六届全国大学生GIS应用技能大赛开发题答案(非官方)

第六届全国大学生GIS应用技能大赛开发题答案(非官方)

题目：

根据你的解决方案，开发一个应用型GIS系统，该系统需要具备以下功能：（其中模型和商业圈道路对应分析题

a. 打开地图文档。（5分）

b. 导航功能，包括放大、缩小、平移、全图。（5分）

c. 调用建立的模型。（10分）

d. 对分配好的商业圈道路进行渲染，每种颜色表示一个志愿者。（10分）

e. 导出地图，格式为jpg。（5分）

f. 保存地图文档。（5分）

答案：

共涉及两个界面，一个主界面和一个模型调用的界面

由于好久不用，主界面崩了，只有代码了。不过没关系，可以参考前两篇文章的界面，也可以自由发挥，不过是一些按钮罢了。

主界面代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.DataSourcesFile;
using ESRI.ArcGIS.DataSourcesGDB;
using ESRI.ArcGIS.DataSourcesRaster;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Geoprocessing;
using ESRI.ArcGIS.Geoprocessor;
using ESRI.ArcGIS.Output;
using ESRI.ArcGIS.SystemUI;

namespace Ex3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.EngineOrDesktop);
            InitializeComponent();
            axTOCControl1.SetBuddyControl(axMapControl1);
        }

        #region 文件
        string path = null;
        private void 打开文档ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            openFileDialog1.Title = "打开文档";
            openFileDialog1.Filter = "ArcMap Document(*.mxd)|*.mxd";
            openFileDialog1.Multiselect = false;
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                path = openFileDialog1.FileName;
                axMapControl1.LoadMxFile(path);
            }
            axMapControl1.Extent = axMapControl1.FullExtent;
            axMapControl1.Refresh();
        }


        private void 保存文档ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (path != null)
            {
                IMxdContents contexts = axMapControl1.Map as IMxdContents;
                IMapDocument mapDocumnet = new MapDocumentClass();
                mapDocumnet.Open(path);
                mapDocumnet.ReplaceContents(contexts);
                mapDocumnet.Save();
                MessageBox.Show("保存成功");
            }
            else
            {
                MessageBox.Show("请先打开文档！");
            }
        }

        private void 导出图片ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            saveFileDialog1.Title = "导出图片";
            saveFileDialog1.Filter = "JPEG(*.jpg)|*.jpg";
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                string pathFileName = saveFileDialog1.FileName;
                IActiveView activeView = axMapControl1.ActiveView;
                ESRI.ArcGIS.Output.IExport export = new ESRI.ArcGIS.Output.ExportJPEGClass();
                export.ExportFileName = pathFileName;

                // Microsoft Windows default DPI resolution
                export.Resolution = 96;
                tagRECT exportRECT = activeView.ExportFrame;
                ESRI.ArcGIS.Geometry.IEnvelope envelope = new ESRI.ArcGIS.Geometry.EnvelopeClass();
                envelope.PutCoords(exportRECT.left, exportRECT.top, exportRECT.right, exportRECT.bottom);
                export.PixelBounds = envelope;
                System.Int32 hDC = export.StartExporting();
                activeView.Output(hDC, (System.Int16)export.Resolution, ref exportRECT, null, null);

                // Finish writing the export file and cleanup any intermediate files
                export.FinishExporting();
                export.Cleanup();
            }
            MessageBox.Show("导出成功");
        }
        #endregion

        #region 地图导航

        private void 指针ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            axMapControl1.CurrentTool = null;
        }

        private void 放大ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (axMapControl1.CurrentTool == null)
            {
                ICommand icc;
                ITool tool = new ControlsMapZoomInToolClass();
                axMapControl1.CurrentTool = tool;
                icc = tool as ICommand;
                icc.OnCreate(axMapControl1.Object);
                icc.OnClick();
            }
            else
            {
                axMapControl1.CurrentTool = null;
            }
        }

        private void 缩小ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (axMapControl1.CurrentTool == null)
            {
                ICommand icc;
                ITool tool = new ControlsMapZoomOutToolClass();
                axMapControl1.CurrentTool = tool;
                icc = tool as ICommand;
                icc.OnCreate(axMapControl1.Object);
                icc.OnClick();
            }
            else
            {
                axMapControl1.CurrentTool = null;
            }
        }

        private void 漫游ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (axMapControl1.CurrentTool == null)
            {
                ICommand icc;
                ITool tool = new ControlsMapPanToolClass();
                axMapControl1.CurrentTool = tool;
                icc = tool as ICommand;
                icc.OnCreate(axMapControl1.Object);
                icc.OnClick();
            }
            else
            {
                axMapControl1.CurrentTool = null;
            }
        }

        private void 全局ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ICommand icc = new ControlsMapFullExtentCommandClass();
            icc.OnCreate(axMapControl1.Object);
            icc.OnClick();
        }

        //鹰眼

        private void axMapControl1_OnMapReplaced(object sender, IMapControlEvents2_OnMapReplacedEvent e)
        {
            axMapControl2.ClearLayers();
            if (axMapControl1.LayerCount != 0)
            {
                ILayer layer;
                for (int i = axMapControl1.LayerCount - 1; i >= 0; i--)
                {
                    layer = axMapControl1.get_Layer(i);
                    IObjectCopy copy = new ObjectCopyClass();
                    ILayer layerCopy = copy.Copy(layer) as ILayer;
                    axMapControl2.AddLayer(layerCopy);
                }
                axMapControl2.SpatialReference = axMapControl1.SpatialReference;
                axMapControl2.Extent = axMapControl1.FullExtent;
                axMapControl2.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
            }
        }

        private void axMapControl1_OnExtentUpdated(object sender, IMapControlEvents2_OnExtentUpdatedEvent e)
        {
            IElement ele = new RectangleElementClass();
            IEnvelope env = axMapControl1.Extent;
            ele.Geometry = env;
            ISimpleLineSymbol lineSymbol = new SimpleLineSymbolClass();
            IRgbColor color1 = new RgbColorClass();
            color1.Red = 255;
            color1.Green = 0;
            color1.Blue = 0;
            color1.Transparency = 255;
            lineSymbol.Color = color1;
            lineSymbol.Width = 2;
            ISimpleFillSymbol simpleFillSymbol = new SimpleFillSymbolClass();
            IRgbColor color2 = new RgbColorClass();
            color2.Red = 255;
            color2.Green = 0;
            color2.Blue = 0;
            color2.Transparency = 0;
            simpleFillSymbol.Color = color2;
            simpleFillSymbol.Outline = lineSymbol;
            IFillShapeElement shapeElement = ele as IFillShapeElement;
            shapeElement.Symbol = simpleFillSymbol;
            IGraphicsContainer gra = axMapControl2.ActiveView.FocusMap as IGraphicsContainer;
            gra.DeleteAllElements();
            gra.AddElement(shapeElement as IElement, 0);
            axMapControl2.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
        }

        private void axMapControl2_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
        {
            if (e.button == 1)
            {
                IPoint pt = new PointClass();
                pt = axMapControl2.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x, e.y);
                axMapControl1.CenterAt(pt);
                axMapControl1.Refresh();
            }
            else
            {
                IEnvelope env = axMapControl2.TrackRectangle();
                axMapControl1.Extent = env;
                axMapControl1.Refresh();
            }
        }

        private void axMapControl2_OnMouseMove(object sender, IMapControlEvents2_OnMouseMoveEvent e)
        {
            if (e.button == 1)
            {
                IPoint pt = new PointClass();
                pt = axMapControl2.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x, e.y);
                axMapControl1.CenterAt(pt);
                axMapControl1.Refresh();
            }
        }

        #endregion

        #region 道路渲染
        //创建随机颜色函数
        private IColor CreateRandomColor(int i)
        {
            Random ran = new Random(i);
            IRgbColor color = new RgbColorClass();
            color.Red = ran.Next(256);
            color.Green= ran.Next(256);
            color.Blue = ran.Next(256);
            return color;
        }
        //根据图层名称获取图层
        private IFeatureLayer GetLayerByName(string name)
        {
            ILayer layer;
            for (int i = 0; i < axMapControl1.LayerCount; i++)
            {
                layer = axMapControl1.get_Layer(i);
                if (layer.Name.Equals(name))
                {
                    return layer as IFeatureLayer;
                }
            }
            return null;
        }
        // 唯一值渲染
        private void 道路渲染ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            IFeatureLayer layer = GetLayerByName("street");
            IUniqueValueRenderer renderer = new UniqueValueRendererClass();
            renderer.FieldCount = 1;
            renderer.set_Field(0, "FID_fishne");
            IFeatureCursor cursor = layer.Search(null, true);
            IFeature feature = cursor.NextFeature();
            while (feature != null)
            {
                int i = Convert.ToInt16(feature.get_Value(0));
                string value = feature.get_Value(feature.Fields.FindField("FID_fishne")).ToString();
                ISimpleLineSymbol lineSymbol = new SimpleLineSymbolClass();
                lineSymbol.Color = CreateRandomColor(i);
                lineSymbol.Style = esriSimpleLineStyle.esriSLSSolid;
                renderer.AddValue(value, "FID_fishne", lineSymbol as ISymbol);
                feature = cursor.NextFeature();
            }

            IGeoFeatureLayer geoLayer = layer as IGeoFeatureLayer;
            geoLayer.Renderer = renderer as IFeatureRenderer;
            axMapControl1.Refresh();
            axTOCControl1.Update();
        }

        #endregion

        #region 调用模型

        private void 调用模型ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            openFileDialog1.Title = "打开模型文件";
            openFileDialog1.Filter = "ToolBox(*.tbx)|*.tbx";
            openFileDialog1.InitialDirectory = Application.StartupPath;
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                调用模型 model = new 调用模型();
                if (model.ShowDialog() == DialogResult.OK)
                {
                    //从 调用模型  窗口获得文件
                    string[] files = model.Files;

                    GeoProcessor gp = new GeoProcessor();
                    gp.OverwriteOutput = true;
                    gp.AddToolbox(openFileDialog1.FileName);

                    IVariantArray array = new VarArrayClass();
                    array.Add(files[0]);
                    array.Add(files[1]);
                    array.Add(files[2]);
                    object sev = null;
                    try
                    {
                        //“模型” 是自己建立的模型（在AcMAP中根据分析题建立）所在路径  模型的输入输出必须与界面相匹配
                        gp.Execute("模型", array, null);
                        
                        Console.WriteLine(gp.GetMessages(ref sev));
                        // 将结果显示在地图控件中
                        IWorkspaceFactory workspaceFactory = new ShapefileWorkspaceFactoryClass();
                        IWorkspace workspace = workspaceFactory.OpenFromFile(System.IO.Path.GetDirectoryName(files[2]), 0);
                        IFeatureWorkspace featureWorkspace = workspace as IFeatureWorkspace;
                        IFeatureClass featureClass = featureWorkspace.OpenFeatureClass(System.IO.Path.GetFileName(files[2]));
                        IFeatureLayer layer = new FeatureLayerClass();
                        layer.FeatureClass = featureClass;
                        layer.Name ="street";
                        axMapControl1.AddLayer(layer);
                        axMapControl1.Refresh();
                        axTOCControl1.Update();
                        MessageBox.Show("Succeed");
                         
                    }
                    catch
                    {
                        // Print geoprocessing execution error messages.
                        Console.WriteLine(gp.GetMessages(ref sev));
                        return;
                    }
                }
            }
        }
        #endregion 
    }
}

调用模型界面：

代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
// 此窗体主要是为了获取输入输出的文件路径，最好与自己建立的模型窗口一致
namespace Ex3
{
    public partial class 调用模型 : Form
    {
        private string[] files = new string[3];
        public string[] Files
        {
            get
            {
                return files;
            }
        }
        public 调用模型()
        {
            InitializeComponent();
        }

        private void button4_Click(object sender, EventArgs e)
        {
           //确定文件存在           
            if(System.IO.File.Exists(textBox1.Text)&&System.IO.File.Exists(textBox2.Text))
            {
            files[0] = textBox1.Text;
            files[1] = textBox2.Text;
            files[2] = textBox3.Text;
            this.DialogResult = DialogResult.OK;
            }
            else
            {
                MessageBox.Show("文件不存在！");
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            openFileDialog1.Title = "选择商业街道路要素文件";
            openFileDialog1.Filter = "ShapeFile(*.shp)|*.shp";
            openFileDialog1.Multiselect = false;
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                textBox1.Text = openFileDialog1.FileName;
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            openFileDialog1.Title = "选择志愿者表";
            openFileDialog1.Filter = "Excel(*.xls;*.xlsx)|*.xls;*.xlsx";
            openFileDialog1.Multiselect = false;
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                textBox2.Text = openFileDialog1.FileName;
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            saveFileDialog1.Title = "保存分配好的文件";
            saveFileDialog1.Filter = "ShapeFile(*.shp)|*.shp";
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                textBox3.Text = saveFileDialog1.FileName;
            }
        }

    }
}