窗体部分

控制台部分

用一个全局变量MouseFlag来触发四种不同的操作。
一方面进行选中要素的NAME字段在showresult.text里的展示，另一方面进行选中要素在图上的高亮展示
主窗体

public override void OnCreate(object hook)
{
if (m_hookHelper == null)
m_hookHelper = new HookHelperClass();
m_hookHelper.Hook = hook;
// TODO: Add ZoomIn.OnCreate implementation
}

public override void OnMouseDown(int Button, int Shift, int X, int Y)
{
// TODO: Add ZoomIn.OnMouseDown implementation
//当前地图为空是视图返回
if (m_hookHelper.ActiveView == null) return;
//获取鼠标点击位置
m_point = m_hookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);
m_isMouseDown = true;
}

public override void OnMouseMove(int Button, int Shift, int X, int Y)
{
// TODO: Add ZoomIn.OnMouseMove implementation
//mouseDown时返回
if (!m_isMouseDown) return;
IActiveView pActiveview = m_hookHelper.ActiveView;
//m_feedback追踪鼠标移动
if (m_feedBack == null)
{
m_feedBack = new NewEnvelopeFeedbackClass();
m_feedBack.Display = pActiveview.ScreenDisplay;
//开始追踪
m_feedBack.Start(m_point);
}
//追踪鼠标移动位置
m_feedBack.MoveTo(pActiveview.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y));
}

public override void OnMouseUp(int Button, int Shift, int X, int Y)
{
// TODO: Add ZoomIn.OnMouseUp implementation
//MouseDown为发生时返回
if (!m_isMouseDown) return;
IActiveView pActiveView = m_hookHelper.ActiveView;
//获取MouseUp发生时的范围并放大
IEnvelope pEnvelope;
if (m_feedBack == null)
{
pEnvelope = pActiveView.Extent;
pEnvelope.Expand(0.5, 0.5, true);
pEnvelope.CenterAt(m_point);
}
else
{
//停止追踪
pEnvelope = m_feedBack.Stop();
//判断新的范围的宽度和高的是否为0
if (pEnvelope.Width == 0 || pEnvelope.Height == 0)
{
m_feedBack = null;
m_isMouseDown = false;
}
}
//获取新的范围
pActiveView.Extent = pEnvelope;
//刷新视图
pActiveView.Refresh();
m_feedBack = null;
m_isMouseDown = false;
}

创建点图层
IWorkspaceFactory pShpWksFact = new ShapefileWorkspaceFactory();
IFeatureWorkspace pFeatWks;
pFeatWks = (IFeatureWorkspace)pShpWksFact.OpenFromFile(filePath, 0);
const string strShapeFieldName = "Shape";
//定义属性字段
IFields pFields;
IFieldsEdit pFieldsEdit;
pFields = new FieldsClass();
pFieldsEdit = (IFieldsEdit)pFields;
IField pField = new FieldClass();
IFieldEdit pFieldEdit = new FieldClass();
pFieldEdit.Name_2 = strShapeFieldName;
pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
pField = (IField)pFieldEdit;
//定义几何属性
IGeometryDef pGeomDef = new GeometryDefClass();
IGeometryDefEdit pGeomDefEdit = new GeometryDefClass();
pGeomDefEdit = (IGeometryDefEdit)pGeomDef;
pGeomDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPoint;
pGeomDefEdit.SpatialReference_2 = (ISpatialReference)new UnknownCoordinateSystem();
pFieldEdit.GeometryDef_2 = pGeomDef;
pFieldsEdit.AddField(pField);
pFields = (IFields)pFieldsEdit;
IFeatureClass pFeatureClass;
pFeatureClass = pFeatWks.CreateFeatureClass(fileName, pFields, null, null, esriFeatureType.esriFTSimple, strShapeFieldName, "");

for (int i = 0; i < addFieldListBox.Items.Count; i++)
{
IField pfield = new FieldClass();
IFieldEdit pfieldEdit = new FieldClass();
pfieldEdit.Name_2 = addFieldListBox.Items[i].ToString();
pfieldEdit.Type_2 = esriFieldType.esriFieldTypeString;
pfield = (IField)pfieldEdit;
pFeatureClass.AddField(pfield);
}

A=GF，B=FG
Ax=GFx=kx
Fx=y
FGFx=FGy=Fkx=kFx=ky