public static void TextElementLabel(IMapControl2 mapControl, IFeatureLayer featureLayer, string fieldName)
{
IMap pMap = mapControl.Map;
// 获取图层所有要素
IFeatureCursor pFeatureCursor = featureLayer.FeatureClass.Search(null, false);
IFeature pFeature = pFeatureCursor.NextFeature();
while (pFeature != null)
{
IFields pFields = pFeature.Fields;
// 找出标注字段的索引号
int index = pFields.FindField(fieldName);
// 得到要素的Envelope对象
IEnvelope pEnv = pFeature.Extent;
IPoint pPoint = new PointClass()
{
X = pEnv.XMin + pEnv.Width / 2,
Y = pEnv.YMin + pEnv.Height / 2
};
// 新建字体对象
stdole.IFontDisp pFont = new stdole.StdFontClass() as stdole.IFontDisp;
pFont.Name = "arial";
// 设置文本符号
ITextSymbol pTextSymbol = new TextSymbolClass()
{
Size = 20,
Font = pFont,
Color = AeUtils.GetRgbColor(255, 0, 0)
};
// 添加文本对象
IElement pTextElement = new TextElementClass()
{
Text = pFeature.get_Value(index).ToString(),
ScaleText = true,
Symbol = pTextSymbol
};
pTextElement.Geometry = pPoint;
(pMap as IGraphicsContainer).AddElement(pTextElement, 0);
mapControl.Refresh(esriViewDrawPhase.esriViewGraphics);
pFeature = pFeatureCursor.NextFeature();
}
}
// 将检测站点导入列表，并设置选择触发事件
private void setListBox()
{
IFeatureLayer pFeatureLayer = AeUtils.GetFeatureLayerByName(m_pMapC2.Map, "监测站");
IFields pFields = pFeatureLayer.FeatureClass.Fields;
IFeatureCursor pFeatureCursor = pFeatureLayer.FeatureClass.Search(null, false);
IFeature pFeature = pFeatureCursor.NextFeature();
while (pFeature != null)
{
string name = pFeature.get_Value(pFields.FindField("Name")).ToString();
listBox_pts.Items.Add(name);
pFeature = pFeatureCursor.NextFeature();
}
// 列表选择项变化触发事件
listBox_pts.SelectedIndexChanged += (object sender, EventArgs e) => {
m_pMapC2.Map.ClearSelection();
string name = listBox_pts.SelectedItem.ToString();
pFeatureCursor = pFeatureLayer.FeatureClass.Search(null, false);
pFeature = pFeatureCursor.NextFeature();
while (pFeature != null)
{
string value = pFeature.get_Value(pFields.FindField("Name")).ToString();
if (value == name)
{
break;
}
pFeature = pFeatureCursor.NextFeature();
}
m_pMapC2.Map.SelectFeature(pFeatureLayer, pFeature);
m_pMapC2.Refresh(esriViewDrawPhase.esriViewGeoSelection);
IEnvelope pEnv = pFeature.Extent;
pEnv.XMin -= 0.5; pEnv.YMin -= 0.5;
pEnv.XMax += 0.5; pEnv.YMax += 0.5;
m_pMapC2.Extent = pEnv;
showInfo(pFeature);
};
}
void Button_Click(object sender, EventArgs e)
{
#region 识别
if ((Button)sender == btn_Identify)
{
m_isIdentify = !m_isIdentify;
if (m_isIdentify)
{
m_isDraw = false;
m_isAddpoint = false;
m_pMapC2.MousePointer = esriControlsMousePointer.esriPointerIdentify;
}
else
{
m_pMapC2.MousePointer = esriControlsMousePointer.esriPointerArrow;
}
return;
}
#endregion
#region 择
if ((Button)sender == btn_select)
{
m_isDraw = !m_isDraw;
if (m_isDraw)
{
m_isIdentify = false;
m_isAddpoint = false;
m_pMapC2.MousePointer = esriControlsMousePointer.esriPointerCrosshair;
}
else
{
m_pMapC2.MousePointer = esriControlsMousePointer.esriPointerArrow;
}
return;
}
#endregion
#region 链接
if ((Button)sender == btn_link)
{
;
Geoprocessor gp = new Geoprocessor()
{
OverwriteOutput = true
};
string table = debugDir + "\\AirQuality\\kqzlzk.dbf";
ESRI.ArcGIS.ConversionTools.ExcelToTable pExcelToTavle = new ESRI.ArcGIS.ConversionTools.ExcelToTable()
{
Input_Excel_File = debugDir + "\\AirQuality\\空气质量状况.xls",
Output_Table = table,
Sheet = "Sheet1"
};
gp.Execute(pExcelToTavle, null);
IFeatureLayer pFeatureLayer = AeUtils.GetFeatureLayerByName(m_pMapC2.Map, "监测站");
ESRI.ArcGIS.DataManagementTools.JoinField pJoinField = new ESRI.ArcGIS.DataManagementTools.JoinField()
{
in_data = pFeatureLayer,
in_field = "Name",
join_table = table,
join_field = "NAME",
fields = "StationID;PM2_5;SO2;NO2"
};
gp.Execute(pJoinField, null);
}
#endregion
#region 注记
if ((Button)sender == btn_anno)
{
IFeatureLayer pFeatureLayer = AeUtils.GetFeatureLayerByName(m_pMapC2.Map, "北京区县界");
AeUtils.TextElementLabel(m_pMapC2, pFeatureLayer, "NAME");
}
#endregion
#region 符号化
if ((Button)sender == btn_symbol)
{
IFeatureLayer pFeatureLayer = AeUtils.GetFeatureLayerByName(m_pMapC2.Map, "北京区县界");
AeUtils.UniqueValueRenderer(pFeatureLayer, "NAME", m_pMapC2, axTOCControl_main);
}
#endregion
#region 保存图层
if ((Button)sender == btn_outlyr)
{
IFeatureLayer pFeatureLayer = AeUtils.GetFeatureLayerByName(m_pMapC2.Map, "北京区县界");
SaveFileDialog sfg = new SaveFileDialog()
{
Title = "保存图层",
Filter = "图层文件 (*.lyr)|*.lyr"
};
if (sfg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
ILayerFile layerfile = new LayerFileClass();
layerfile.New(sfg.FileName);
layerfile.ReplaceContents(pFeatureLayer);
layerfile.Save();
}
}
#endregion
if ((Button)sender == btn_addpt)
{
m_isAddpoint = !m_isAddpoint;
if (m_isAddpoint)
{
m_isDraw = false;
m_isIdentify = false;
m_pMapC2.MousePointer = esriControlsMousePointer.esriPointerCrosshair;
}
else
{
m_pMapC2.MousePointer = esriControlsMousePointer.esriPointerArrow;
}
}
}
void axMapControl_main_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
{
// c. 在地图上点击，选择一个监测站点，并显示该监测站点的属性信息 第②步
#region ...
if (e.button == 1 && m_isIdentify)
{
IEnvelope pClickEnv = new EnvelopeClass()
{
XMin = e.mapX - 0.01,
YMin = e.mapY - 0.01,
XMax = e.mapX + 0.01,
YMax = e.mapY + 0.01
};
IFeatureLayer pFeatureLayer = AeUtils.GetFeatureLayerByName(m_pMapC2.Map, "监测站");
IFeatureCursor pFeatureCursor = pFeatureLayer.FeatureClass.Search(null, false);
IFeature pFeature = pFeatureCursor.NextFeature();
while (pFeature != null)
{
IEnvelope pTargetEnv = pFeature.Extent;
if (pTargetEnv.XMax < pClickEnv.XMax && pTargetEnv.XMin > pClickEnv.XMin &&
pTargetEnv.YMax < pClickEnv.YMax && pTargetEnv.YMin > pClickEnv.YMin)
{
break;
}
pFeature = pFeatureCursor.NextFeature();
}
m_pMapC2.Map.ClearSelection();
m_pMapC2.Map.SelectFeature(pFeatureLayer, pFeature);
m_pMapC2.Refresh();
if (pFeature != null)
{
showInfo(pFeature);
}
}
#endregion
// d. 在监测站点列表中选择一个监测站点后，在地图上高亮显示，缩放至该监测站点，并显示该监测站点的属性信息 第②步
#region ...
if (e.button == 1 && m_isDraw)
{
IFeatureLayer pFeatureLayer = AeUtils.GetFeatureLayerByName(m_pMapC2.Map, "监测站");
IGeometry pGeometry = m_pMapC2.TrackPolygon();
IElement pElement = new PolygonElementClass()
{
Geometry = pGeometry
};
IFillShapeElement pFillShapeElement = pElement as IFillShapeElement;
pFillShapeElement.Symbol = new SimpleFillSymbolClass()
{
Color = AeUtils.GetRgbColor(0, 0, 0, 0),
Outline = new SimpleLineSymbolClass()
{
Color = AeUtils.GetRgbColor(255, 0, 0),
Width = 1
}
};
IGraphicsContainer pGraphicsContainer = m_pMapC2.Map as IGraphicsContainer;
pGraphicsContainer.DeleteAllElements();
pGraphicsContainer.AddElement(pFillShapeElement as IElement, 0);
m_pMapC2.Refresh(esriViewDrawPhase.esriViewGraphics);
AeUtils.GetFeatureLayerByName(m_pMapC2.Map, "北京区县界").Selectable = false;
m_pMapC2.Map.SelectByShape(pGeometry, null, false);
m_pMapC2.Refresh(esriViewDrawPhase.esriViewGeoSelection);
MessageBox.Show(String.Format("当前已选中{0}个监测站", m_pMapC2.Map.SelectionCount));
}
#endregion
// j. 在监测站点图层添加一个新站点
#region ...
if (e.button == 1 && m_isAddpoint)
{
IFeatureLayer pFeatureLayer = AeUtils.GetFeatureLayerByName(m_pMapC2.Map, "监测站");
IPoint pPoint = new PointClass()
{
X = e.mapX,
Y = e.mapY,
SpatialReference = m_pMapC2.SpatialReference
};
IFeatureClassWrite pWrite = pFeatureLayer.FeatureClass as IFeatureClassWrite;
IWorkspaceEdit pEdit = (pFeatureLayer.FeatureClass as IDataset).Workspace as IWorkspaceEdit;
pEdit.StartEditing(true);
pEdit.StartEditOperation();
IFeature pFeature = pFeatureLayer.FeatureClass.CreateFeature();
pFeature.Shape = pPoint;
FormSetName formSetName = new FormSetName();
formSetName.ShowDialog();
pFeature.set_Value(pFeatureLayer.FeatureClass.Fields.FindField("Name"), formSetName.name);
pFeature.Store();
pWrite.WriteFeature(pFeature);
pEdit.StopEditOperation();
pEdit.StopEditing(true);
m_pMapC2.Refresh();
}
#endregion
if (e.button == 4)
{
m_pMapC2.MousePointer = esriControlsMousePointer.esriPointerPanning;
m_pMapC2.Pan();
m_pMapC2.MousePointer = esriControlsMousePointer.esriPointerPan;
}
}
