4、编译运行
7.2、右键菜单实现的基本思路如下
1、设计图层控制的菜单。响应ContextMenuStrip菜单控件为图层添加菜单项显示属性 表菜单和删除图层菜单。该菜单是在鼠标右键点击图层时弹出的快捷菜单。
2、实现图层与图层控制菜单间的关联。响应TOCControl控件的OnMouseDown事件添加 相关代码。
private void axTOCControl1_OnMouseDown(object sender, ITOCControlEvents_OnMouseDownEvent e) {
axTOCControl1.ContextMenuStrip = null; IBasicMap map = new MapClass() ; System.Object other = null ; System.Object index = null;
esriTOCControlItem item = esriTOCControlItem.esriTOCControlItemNone;
axTOCControl1.HitTest(e.x, e.y, ref item, ref map, ref layer, ref other, ref index); if (item == esriTOCControlItem.esriTOCControlItemLayer && e.button == 2) {
System.Drawing.Point pt = new System.Drawing.Point(); pt.X = e.x; pt.Y = e.y;
pt = this.axTOCControl2.PointToScreen(pt);
this.contextMenuStrip1.Show(pt); } }
3、设计一个属性表窗体。a.添加一个属性表窗体。b.为属性表窗体添加DataGridView控件。 c.为属性表窗体编写相关代码实现图层属性信息往属性表中的添加。
1在解决方案管理器中右击选择“MyForm.cs|添加|新建项|Windows窗体”命名为 “attribute.cs”.
3.2加载控件Panel(容器)至TOCControl控件中加载控件DataGirdView(数据)至Panel(容 器)控件中并全部设置其Dock属性为Fill.
3.3双击“attribute.cs”类在代码框中引用类库并修改加载代码如下 using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.Controls; using ESRI.ArcGIS.esriSystem; using ESRI.ArcGIS.Display; using ESRI.ArcGIS.Geometry; using ESRI.ArcGIS.Output; using ESRI.ArcGIS.SystemUI; using ESRI.ArcGIS.Geodatabase; namespace MyForms {
public partial class attribute : Form {
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private ILayer layer;
public attribute(ILayer lyr) {
InitializeComponent(); layer = lyr;
this.Text = \属性表\ }
private void attribute_Load(object sender, EventArgs e) {
} } }
try {
ITable lyrtable = (ITable)layer;
DataTable table = new DataTable(); IField field;
for (int i = 0; i < lyrtable.Fields.FieldCount; i++) {
field = lyrtable.Fields.get_Field(i); table.Columns.Add(field.Name); }
object[] values = new object[lyrtable.Fields.FieldCount]; IQueryFilter queryFilter = new QueryFilterClass(); ICursor cursor = lyrtable.Search(queryFilter, true); IRow row; while ((row = cursor.NextRow()) != null) {
for (int j = 0; j < lyrtable.Fields.FieldCount; j++) {
object ob = row.get_Value(j); values[j] = ob; }
table.Rows.Add(values); }
this.dataGridView1.DataSource = table; }
catch {
MessageBox.Show(\无法显示属性表\ this.Close(); } 25
4、建立图层控制菜单与属性表的连接实现属性表界面的显示。双击图层控制菜单上的“显 示属性表”菜单项在响应的Click事件中添加代码。 private void 打开属性表Click(object sender, EventArgs e) {
attribute AttributeForm = new attribute(layer); AttributeForm.Show(); }
private void 删除属性表ContextMenu_Click(object sender, EventArgs e) {
for (int i = 0; i < this.axMapControl1.Map.LayerCount; i++) {
if (this.axMapControl1.Map.get_Layer(i) == layer) {
this.axMapControl1.DeleteLayer(i); } } }
5.运行。 8.打开GPS： 添加打开、关闭按纽。添加serialport控件、label控件、状态栏控件、 checkBox控件、combobox控件、textBox控件（Multiline属性改为TRUE）。
serialport控件中的DataRecevied事件中添加：
private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e) {
this.BeginInvoke(new myDelegate(showdata)); }
public void showdata()
{ //string Data = serialPort1.ReadLine(); //txtDataReceived.AppendText(Data); //txtDataReceived.ScrollToCaret();
try {
//string Data = serialPort.ReadExisting(); string Data = serialPort1.ReadLine(); txtDataReceived.AppendText(Data); txtDataReceived.ScrollToCaret();
//toolStripStatusLabel2.Text = \正接受数据\ /获取数据
if (Data.StartsWith(\))
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{
if (!processGPSData(Data)) {
toolStripStatusLabel1.Text = \信号不稳定¨\; } } }
catch (Exception ex) {
Console.WriteLine(ex.ToString()); } }
private bool processGPSData(string str) { try {
string[] field;
field = str.Split(','); if (field[2] != \) {
//无效定位返回 //return false; }
//latitude double rawLatLng;
rawLatLng = Convert.ToDouble(field[3]);
lat = ((int)(rawLatLng / 100)) + ((rawLatLng - (((int)(rawLatLng / 100) * 100)) / 60));
if (field[4] == \) {
lat *= -1; }
//longtitude
rawLatLng = Convert.ToDouble(field[5]);
lng = ((int)(rawLatLng / 100)) + ((rawLatLng - (((int)(rawLatLng / 100) * 100)) / 60));
if (field[6] == \) {
lng *= -1; }
toolStripStatusLabel1.Text = \ + lat.ToString() + \ + lng.ToString();
if (this.record.Checked)//记录GPS数据 { recordGPSData();
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