ArcEngine添加指北针

程序主界面如下图所示：

主界面代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.DataSourcesFile;
using ESRI.ArcGIS.DataSourcesGDB;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Output;
using ESRI.ArcGIS.SystemUI;namespace WindowsFormsApplication1
{public partial class FrmMain : DevComponents.DotNetBar.RibbonForm{private INorthArrow m_NorthArrrow;private IElement m_Element;private string operation;// 构造函数public FrmMain(){InitializeComponent();}// 地图放大private void btnZoomIn_Click(object sender, EventArgs e){operation = null;ICommand command = new ControlsPageZoomInTool();command.OnCreate(axPageLayoutControl1.Object);axPageLayoutControl1.CurrentTool = command as ITool;}// 地图缩小private void btnZoomOut_Click(object sender, EventArgs e){operation = null;ICommand command = new ControlsPageZoomOutTool();command.OnCreate(axPageLayoutControl1.Object);axPageLayoutControl1.CurrentTool = command as ITool;}// 地图漫游private void btnPan_Click(object sender, EventArgs e){operation = null;ICommand command = new ControlsPagePanTool();command.OnCreate(axPageLayoutControl1.Object);axPageLayoutControl1.CurrentTool = command as ITool;}// 全图显示private void btnFullExtent_Click(object sender, EventArgs e){ICommand command = new ControlsPageZoomWholePageCommand();command.OnCreate(axPageLayoutControl1.Object);command.OnClick();}// 添加数据private void btnLoadData_Click(object sender, EventArgs e){ICommand command = new ControlsAddDataCommand();command.OnCreate(axPageLayoutControl1.Object);command.OnClick();}// 添加指北针private void btnAddNorthArrow_Click(object sender, EventArgs e){FrmNorthArrow frmNorthArrow = new FrmNorthArrow();frmNorthArrow.OnQueryNorthArrow += pNorthArrow => m_NorthArrrow = pNorthArrow;frmNorthArrow.ShowDialog();axPageLayoutControl1.CurrentTool = null;axPageLayoutControl1.MousePointer = esriControlsMousePointer.esriPointerCrosshair;operation = "添加指北针";}// OnMouseDown事件private void axPageLayoutControl1_OnMouseDown(object sender, IPageLayoutControlEvents_OnMouseDownEvent e){if (operation == "添加指北针"){IEnvelope pEnvelope = axPageLayoutControl1.TrackRectangle();if (pEnvelope.IsEmpty || pEnvelope == null || pEnvelope.Width == 0 || pEnvelope.Height == 0){return;}// 删除已有指北针IActiveView pActiveViewv = axPageLayoutControl1.PageLayout as IActiveView;IGraphicsContainer pGraphicsContainer = pActiveViewv.GraphicsContainer;if (m_Element != null){pGraphicsContainer.DeleteElement(m_Element);pActiveViewv.Refresh();}// 获取框架元素IMapFrame pMapFrame = pGraphicsContainer.FindFrame(pActiveViewv.FocusMap) as IMapFrame;IMapSurroundFrame pMapSurroundFrame = new MapSurroundFrame() as IMapSurroundFrame;pMapSurroundFrame.MapFrame = pMapFrame;pMapSurroundFrame.MapSurround = m_NorthArrrow as IMapSurround;// 添加指北针m_Element = pMapSurroundFrame as IElement;m_Element.Geometry = pEnvelope;pGraphicsContainer.AddElement(m_Element, 0);pActiveViewv.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);}}}
}

添加指北针界面如下图所示：
指北针界面代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using stdole;
using ESRI.ArcGIS.ADF;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.DataSourcesFile;
using ESRI.ArcGIS.DataSourcesGDB;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Output;
using ESRI.ArcGIS.SystemUI;namespace WindowsFormsApplication1
{public partial class FrmNorthArrow : DevComponents.DotNetBar.OfficeForm{// 定义事件public event Action<INorthArrow> OnQueryNorthArrow;// 样式变量private ISymbologyStyleClass m_SymbologyStyleClass;private IStyleGalleryItem m_StyleGalleryItem;private INorthArrow m_NorthArrow;// 构造函数public FrmNorthArrow(){InitializeComponent();}// Load事件private void FrmNorthArrow_Load(object sender, EventArgs e){axSymbologyControl1.LoadStyleFile(Application.StartupPath + "\\style\\ESRI.ServerStyle");axSymbologyControl1.StyleClass = esriSymbologyStyleClass.esriStyleClassNorthArrows;// 选择符号m_SymbologyStyleClass = axSymbologyControl1.GetStyleClass(axSymbologyControl1.StyleClass);m_SymbologyStyleClass.SelectItem(0);// 预览符号PriviewSymbol();inputAngle.Value = (int)m_NorthArrow.CalibrationAngle;inputColor.SelectedColor = Utility.ConvertToColor(m_NorthArrow.Color);}// 切换符号private void axSymbologyControl1_OnItemSelected(object sender, ISymbologyControlEvents_OnItemSelectedEvent e){m_StyleGalleryItem = e.styleGalleryItem as IStyleGalleryItem;m_NorthArrow = m_StyleGalleryItem.Item as INorthArrow;// PriviewSymbol();inputAngle.Value = (int)m_NorthArrow.CalibrationAngle;inputColor.SelectedColor = Utility.ConvertToColor(m_NorthArrow.Color);}// 设置颜色private void inputColor_SelectedColorChanged(object sender, EventArgs e){m_NorthArrow.Color = Utility.ConvertToRgbColor(inputColor.SelectedColor);PriviewSymbol();}// 设置角度private void inputAngle_ValueChanged(object sender, EventArgs e){m_NorthArrow.CalibrationAngle = inputAngle.Value;PriviewSymbol();}// 符号预览 private void PriviewSymbol(){IPictureDisp pPictureDisp = m_SymbologyStyleClass.PreviewItem(m_StyleGalleryItem, pictureBox1.Width, pictureBox1.Height);Image priviewImage = Image.FromHbitmap(new IntPtr(pPictureDisp.Handle));pictureBox1.Image = priviewImage;}// 确定private void btnOk_Click(object sender, EventArgs e){if (OnQueryNorthArrow != null){m_NorthArrow.Size *= 3;OnQueryNorthArrow(m_NorthArrow);this.Close();this.Dispose();}}// 取消private void btnCancel_Click(object sender, EventArgs e){this.Close();this.Dispose();}}
}

辅助类代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using stdole;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.DataSourcesFile;
using ESRI.ArcGIS.DataSourcesGDB;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Output;
using ESRI.ArcGIS.SystemUI;namespace WindowsFormsApplication1
{public class Utility{// Color转换为IColorpublic static IColor ConvertToRgbColor(Color color){IColor pColor = new RgbColor();pColor.RGB = color.R + color.G * 256 + color.B * 65536;return pColor;}// IColor转换为Colorpublic static Color ConvertToColor(IColor pColor){return ColorTranslator.FromOle(pColor.RGB);}}
}

运行结果如下图：

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