www.pudn.com > C sharp和MapObjects实现.rar > frmInfo.cs
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
namespace MainSystem
{
public struct ItemInfo
{
public string szName;
public string szType;
public string szSubType;
public string szTable;
public string szFieldName;
public MapObjects2.Recordset rst;
public MapObjects2.MapLayer layer;
};
///
/// Summary description for frmInfo.
///
public class frmInfo : System.Windows.Forms.Form
{
private System.Windows.Forms.Label _label_layer;
private System.Windows.Forms.ListBox _listBox1;
private System.Windows.Forms.Label _label1;
private System.Windows.Forms.ComboBox _comboBox1;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
private frmMain _frmMain;
private ItemInfo[] _itmInfos;
private int _nIdx;
public frmInfo(frmMain mainForm)
{
_frmMain = mainForm;
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.SizableToolWindow;
InitializeComponent();
}
///
/// Clean up any resources being used.
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
///
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///
private void InitializeComponent()
{
this._label_layer = new System.Windows.Forms.Label();
this._listBox1 = new System.Windows.Forms.ListBox();
this._label1 = new System.Windows.Forms.Label();
this._comboBox1 = new System.Windows.Forms.ComboBox();
this.SuspendLayout();
//
// _label_layer
//
this._label_layer.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left);
this._label_layer.Location = new System.Drawing.Point(8, 244);
this._label_layer.Name = "_label_layer";
this._label_layer.Size = new System.Drawing.Size(152, 24);
this._label_layer.TabIndex = 9;
this._label_layer.Text = "图层名：";
//
// _listBox1
//
this._listBox1.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right);
this._listBox1.ItemHeight = 12;
this._listBox1.Location = new System.Drawing.Point(8, 52);
this._listBox1.Name = "_listBox1";
this._listBox1.SelectionMode = System.Windows.Forms.SelectionMode.None;
this._listBox1.Size = new System.Drawing.Size(152, 184);
this._listBox1.TabIndex = 8;
//
// _label1
//
this._label1.Location = new System.Drawing.Point(8, 4);
this._label1.Name = "_label1";
this._label1.Size = new System.Drawing.Size(144, 16);
this._label1.TabIndex = 7;
//
// _comboBox1
//
this._comboBox1.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right);
this._comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this._comboBox1.Location = new System.Drawing.Point(8, 20);
this._comboBox1.Name = "_comboBox1";
this._comboBox1.Size = new System.Drawing.Size(152, 20);
this._comboBox1.TabIndex = 6;
this._comboBox1.SelectionChangeCommitted += new System.EventHandler(this._comboBox1_SelectionChangeCommitted);
//
// frmInfo
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(168, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this._label_layer,
this._listBox1,
this._label1,
this._comboBox1});
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.SizableToolWindow;
this.Name = "frmInfo";
this.Text = "地物详细信息";
this.Load += new System.EventHandler(this.frmInfo_Load);
this.ResumeLayout(false);
}
#endregion
private void frmInfo_Load(object sender, System.EventArgs e)
{
_label_layer.Text = "图层名：没有";
}
//////////////////////////////////////////////////////////////////////////////////////////////////////
//功能：确定指定位置的地物
//参数：[in]long x 鼠标位置的X值(像素坐标)
// [in]long y 鼠标位置的Y值(像素坐标)
//返回值：void
/// /////////////////////////////////////////////////////////////////////////////////////////////////
public void Identify(long x , long y)
{
CEnvironment env = _frmMain._environment;
env.ClearSelRsts();
int nFeatCount = 0; //选中地物的数目
MapObjects2.Point pt; //鼠标的位置(地图坐标)
pt = _frmMain._map.ToMapPoint(x,y);
_nIdx = -1;
//初始化控件
_comboBox1.Items.Clear();
_listBox1.Items.Clear();
_itmInfos = new ItemInfo[env.m_nLayerNum];
//动态计算查询距离
double dScale = env.CalcScale(_frmMain._map); //地图比例尺
if (dScale > 8000)
{
dScale = dScale/10000;
dScale = dScale / 5000;
}
else
{
dScale = dScale/10000;
dScale = dScale / 2500;
}
//首先，查询点地物，其次，查询线地物，最后查询面状地物
//查询的图层只要是可见的
MapObjects2.ShapeTypeConstants[] aShapeType = new MapObjects2.ShapeTypeConstants[3];
aShapeType[0] = MapObjects2.ShapeTypeConstants.moShapeTypePoint;
aShapeType[1] = MapObjects2.ShapeTypeConstants.moShapeTypeLine;
aShapeType[2] = MapObjects2.ShapeTypeConstants.moShapeTypePolygon;
for (int j = 0; j < 3; j ++)
{
for (int i = 0; i < env.m_nLayerNum; i ++)
{
if (env.m_layerInfos[i].layer.shapeType !=aShapeType[j])
continue;
_itmInfos[i].szName = "";
//图层可见并且可选择，才能够identify
if (env.m_layerInfos[i].layer.Visible && env.m_layerInfos[i].bCanSelected)
{
_itmInfos[i].rst = env.m_layerInfos[i].layer.SearchByDistance(pt,dScale,"");
}
else
{
//图层不可显示，则跳到下一个
_itmInfos[i].rst = null;
continue;
}
_itmInfos[i].szTable =env.m_layerInfos[i].szTableName;
_itmInfos[i].layer =env.m_layerInfos[i].layer ;
_itmInfos[i].szType =env.m_layerInfos[i].szType;
_itmInfos[i].szSubType =env.m_layerInfos[i].szSubType;
_itmInfos[i].szFieldName = env.m_layerInfos[i].szFieldName;
if (_itmInfos[i].rst != null)
{
if (!_itmInfos[i].rst.EOF)
{
if (_itmInfos[i].rst.Fields._Item("名称").Value != System.DBNull.Value)
{
_itmInfos[i].szName = _itmInfos[i].rst.Fields._Item("名称").Value.ToString();
}
else
{
_itmInfos[i].rst = null;
continue;
}
if (_itmInfos[i].szName != "")
{
_comboBox1.Items.Add(_itmInfos[i].szName);
nFeatCount ++;
}
}
}
}
}
if (nFeatCount > 0)
{
this._label1.Text = "总共找到"+nFeatCount.ToString()+"个地名";
this._comboBox1.SelectedIndex = 0;
_nIdx = 0;
LoadListBox(GetIndex(_comboBox1.Items[0].ToString()));
}
else
{
this._label1.Text = "没有找到任何地名";
_label_layer.Text = "类型：没有";
env.m_selectedSymbol = null;
env.m_selectedFeature = null;
}
}
/// /////////////////////////////////////////////////////////////////////////////////////////
/// 功能：显示地名的详细信息
/// 参数：
/// 返回值：
/// ///////////////////////////////////////////////////////////////////////////////////////
private void LoadListBox(int nIndex)
{
if ("" == _itmInfos[nIndex].szName)
return;
_listBox1.Items.Clear();
_label_layer.Text = "类型："+_itmInfos[nIndex].szSubType;
if (_itmInfos[nIndex].szTable == "")
{
_listBox1.Items.Add("没有详细信息");
goto FLASH;
}
else
{
string strConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + _frmMain._environment.m_szDBName +
";Persist Security Info=False";
System.Data.OleDb.OleDbConnection myConnection = new System.Data.OleDb.OleDbConnection(strConnectionString);
myConnection.Open();
System.Data.DataSet dataSet = new System.Data.DataSet("临时库");
System.Data.OleDb.OleDbDataAdapter myDataAdapter;
string szSQL;
szSQL = "Select * From [" + _itmInfos[nIndex].szTable + "] Where "+_itmInfos[nIndex].szFieldName +" ='"+_itmInfos[nIndex].szName+"'";
myDataAdapter = new System.Data.OleDb.OleDbDataAdapter(szSQL,myConnection);
try
{
myDataAdapter.Fill(dataSet,"地名");
}
catch
{
goto FLASH;
}
System.Data.DataTable indexTbl = dataSet.Tables["地名"];
System.Data.DataRow[] rowsType = indexTbl.Select();
if (0 == rowsType.Length)
{
_listBox1.Items.Add("没有详细信息");
goto FLASH;
}
for (int i = 0; i < indexTbl.Columns.Count; i ++)
{
string szValue = indexTbl.Columns[i].ColumnName + ":" + rowsType[0][i].ToString();
_listBox1.Items.Add(szValue);
}
}
FLASH:
_frmMain._map.FlashShape(_itmInfos[nIndex].rst.Fields.Item("Shape").Value ,4);
//设置选中地物的符号
if (_frmMain._environment.m_layerInfos[nIndex].nCharacterIndex >= 0 && _frmMain._environment.m_layerInfos[nIndex].layer.shapeType == MapObjects2.ShapeTypeConstants.moShapeTypePoint )
{
_frmMain._environment.m_selectedSymbol = new MapObjects2.Symbol();
_frmMain._environment.m_selectedSymbol.SymbolType = MapObjects2.SymbolTypeConstants.moPointSymbol;
_frmMain._environment.m_selectedSymbol.Font.Name = _frmMain._environment.m_layerInfos[nIndex].szFontName;
_frmMain._environment.m_selectedSymbol.Style = 4;
_frmMain._environment.m_selectedSymbol.Size = (short)_frmMain._environment.m_layerInfos[nIndex].layer.Symbol.Size;
_frmMain._environment.m_selectedSymbol.CharacterIndex = (short)_frmMain._environment.m_layerInfos[nIndex].nCharacterIndex;
_frmMain._environment.m_selectedSymbol.Color = 0xff;
_frmMain._environment.m_selectedSymbolSize = (short)_frmMain._environment.m_layerInfos[nIndex].nSymSize;
}
else
{
if (_frmMain._environment.m_layerInfos[nIndex].layer.shapeType == MapObjects2.ShapeTypeConstants.moShapeTypePoint )
{
_frmMain._environment.m_selectedSymbol = new MapObjects2.Symbol();
_frmMain._environment.m_selectedSymbol.SymbolType = _frmMain._environment.m_layerInfos[nIndex].layer.Symbol.SymbolType;
_frmMain._environment.m_selectedSymbol.Style = _frmMain._environment.m_layerInfos[nIndex].layer.Symbol.Style;
_frmMain._environment.m_selectedSymbol.Size = _frmMain._environment.m_layerInfos[nIndex].layer.Symbol.Size;
_frmMain._environment.m_selectedSymbol.Color = 0xff;
_frmMain._environment.m_selectedSymbolSize = (short)_frmMain._environment.m_layerInfos[nIndex].nSymSize;
}
else
_frmMain._environment.m_selectedSymbol = null;
}
_frmMain._environment.m_selectedFeature =_itmInfos[nIndex].rst.Fields.Item("Shape").Value;
_frmMain._map.Extent = _frmMain._map.Extent;
}
private int GetIndex(string szName)
{
int nIndex = -1;
for (int i = 0; i < _frmMain._environment.m_nLayerNum; i ++)
{
if (_itmInfos[i].szName.Equals(szName))
{
nIndex = i;
break;
}
}
return nIndex;
}
private void _comboBox1_SelectionChangeCommitted(object sender, System.EventArgs e)
{
if (_nIdx != _comboBox1.SelectedIndex)
_nIdx = _comboBox1.SelectedIndex;
else
{
_frmMain._map.FlashShape(_itmInfos[GetIndex(_comboBox1.Items[_nIdx].ToString())].rst.Fields.Item("Shape").Value ,4);
return;
}
LoadListBox(GetIndex(_comboBox1.Items[_nIdx].ToString()));
}
}
}