/// <summary>
/// 分级渲染单个图层
/// </summary>
/// <param name="g"></param>
/// <param name="layer"></param>
private void RenderAsClassBreaksRenderer(Graphics g, Layer layer)
{
ClassBreaksRenderer cRenderer = layer.Renderer as ClassBreaksRenderer; // 强转，使图层渲染器为分级渲染器
string field = cRenderer.Field;
//图层为点图层
if (layer.FeatureType == typeof(PointD))
{
for (int i = 0; i < layer.Features.Count; i++)
{
double value = Convert.ToDouble(layer.Table.Rows[i][field]); //获取feature的相应值
PointSymbol pSymbol = cRenderer.FindSymbol(value) as PointSymbol; //获取符号类型
PointD point = layer.Features[i] as PointD; //获取id为i的点
//转换为屏幕坐标,绘制
PointD screenPoint = FromMapPoint(point);
PointF DrawPoint = new PointF((float)screenPoint.X, (float)screenPoint.Y);
pSymbol.DrawPoint(g, DrawPoint);
}
}
//图层为折线图层
else if (layer.FeatureType == typeof(Polyline))
{
for (int i = 0; i < layer.Features.Count; i++)
{
double value = Convert.ToDouble(layer.Table.Rows[i][field]); //获取feature的相应值
LineSymbol lSymbol = cRenderer.FindSymbol(value) as LineSymbol; //获取符号类型
Polyline line = layer.Features[i] as Polyline; //获得折线
List <PointF> screenLine = new List <PointF>();
for (int j = 0; j < line.Data.Count; j++)
{
PointD point = FromMapPoint(line.Data[j]); //坐标转换
screenLine.Add(new PointF((float)point.X, (float)point.Y)); //添加到绘制队列
}
lSymbol.DrawLine(g, screenLine.ToArray()); //绘制
}
}
//图层为复合折线图层
else if (layer.FeatureType == typeof(MultiPolyline))
{
for (int i = 0; i < layer.Features.Count; i++)
{
double value = Convert.ToDouble(layer.Table.Rows[i][field]); //获取feature的相应值
LineSymbol lSymbol = cRenderer.FindSymbol(value) as LineSymbol; //获取符号类型
MultiPolyline lines = layer.Features[i] as MultiPolyline; //获得复合折线
for (int j = 0; j < lines.Data.Count; j++)
{
Polyline line = lines.Data[j];
List <PointF> screenLine = new List <PointF>();
for (int k = 0; k < line.Data.Count; k++)
{
PointD point = FromMapPoint(line.Data[k]); //坐标转换
screenLine.Add(new PointF((float)point.X, (float)point.Y)); //添加到绘制队列
}
lSymbol.DrawLine(g, screenLine.ToArray()); //绘制
}
}
}
//图层为多边形图层
else if (layer.FeatureType == typeof(Polygon))
{
for (int i = 0; i < layer.Features.Count; i++)
{
double value = Convert.ToDouble(layer.Table.Rows[i][field]); //获取feature的相应值
PolygonSymbol pSymbol = cRenderer.FindSymbol(value) as PolygonSymbol; //获取符号类型
Polygon polygon = layer.Features[i] as Polygon; //获得折线
List <PointF> screenPolygon = new List <PointF>();
for (int j = 0; j < polygon.Data.Count; j++)
{
PointD point = FromMapPoint(polygon.Data[j]); //坐标转换
screenPolygon.Add(new PointF((float)point.X, (float)point.Y)); //添加到绘制队列
}
pSymbol.DrawPolygon(g, screenPolygon.ToArray()); //绘制
}
}
//图层为复合折线图层
else if (layer.FeatureType == typeof(MultiPolygon))
{
for (int i = 0; i < layer.Features.Count; i++)
{
double value = Convert.ToDouble(layer.Table.Rows[i][field]); //获取feature的相应值
PolygonSymbol pSymbol = cRenderer.FindSymbol(value) as PolygonSymbol; //获取符号类型
MultiPolygon polygons = layer.Features[i] as MultiPolygon; //获得复合折线
for (int j = 0; j < polygons.Data.Count; j++)
{
Polygon polygon = polygons.Data[j];
List <PointF> screenPolygon = new List <PointF>();
for (int k = 0; k < polygon.Data.Count; k++)
{
PointD point = FromMapPoint(polygon.Data[k]); //坐标转换
screenPolygon.Add(new PointF((float)point.X, (float)point.Y)); //添加到绘制队列
}
pSymbol.DrawPolygon(g, screenPolygon.ToArray()); //绘制
}
}
}
}
private void RenderLabel(Graphics g, Layer layer)
{
//获取标注的风格
LabelStyle lStyle = layer.LabelStyle;
string sField = lStyle.Field;
Font sFont = lStyle.Font;
Brush sBrush = new SolidBrush(lStyle.Color);
try
{
//点绘制注记
if (layer.FeatureType == typeof(PointD))
{
for (int i = 0; i < layer.Features.Count; i++)
{
//获取注记位置
PointD LabelLocation = new PointD();
LabelLocation.X = (layer.Features[i].Box.MinX + layer.Features[i].Box.MaxX) / 2;
LabelLocation.Y = (layer.Features[i].Box.MinY + layer.Features[i].Box.MaxY) / 2;
LabelLocation = FromMapPoint(LabelLocation);
PointF screenLocation = new PointF();
screenLocation.X = (float)LabelLocation.X;
screenLocation.Y = (float)LabelLocation.Y;
//获取注记文本大小，调整注记中心
string labelStr = layer.Table.Rows[i][sField].ToString();
SizeF labelSize = g.MeasureString(labelStr, sFont);
screenLocation.X -= labelSize.Width / 2;
screenLocation.Y -= labelSize.Height / 2;
screenLocation.Y -= 8;
//绘图
g.DrawString(labelStr, sFont, sBrush, screenLocation);
}
}
//折线绘制注记
else if (layer.FeatureType == typeof(Polyline))
{
for (int i = 0; i < layer.Features.Count; i++)
{
Polyline polyline = layer.Features[i] as Polyline;
int midindex = (int)(polyline.Data.Count / 2);
//获取注记位置,为下标中点对应点
PointD LabelLocation = new PointD();
LabelLocation.X = polyline.Data[midindex].X;
LabelLocation.Y = polyline.Data[midindex].Y;
LabelLocation = FromMapPoint(LabelLocation);
PointF screenLocation = new PointF();
screenLocation.X = (float)LabelLocation.X;
screenLocation.Y = (float)LabelLocation.Y;
//获取注记文本大小，调整注记中心
string labelStr = layer.Table.Rows[i][sField].ToString();
SizeF labelSize = g.MeasureString(labelStr, sFont);
screenLocation.X -= labelSize.Width / 2;
screenLocation.Y -= labelSize.Height / 2;
//绘图
g.DrawString(labelStr, sFont, sBrush, screenLocation);
}
}
//复合折线绘制注记
else if (layer.FeatureType == typeof(MultiPolyline))
{
for (int i = 0; i < layer.Features.Count; i++)
{
MultiPolyline multiline = layer.Features[i] as MultiPolyline;
int midindex = (int)(multiline.Data[0].Data.Count / 2);
//获取注记位置
PointD LabelLocation = new PointD();
LabelLocation.X = multiline.Data[0].Data[midindex].X;
LabelLocation.Y = multiline.Data[0].Data[midindex].Y;
LabelLocation = FromMapPoint(LabelLocation);
PointF screenLocation = new PointF();
screenLocation.X = (float)LabelLocation.X;
screenLocation.Y = (float)LabelLocation.Y;
//获取注记文本大小，调整注记中心
string labelStr = layer.Table.Rows[i][sField].ToString();
SizeF labelSize = g.MeasureString(labelStr, sFont);
screenLocation.X -= labelSize.Width / 2;
screenLocation.Y -= labelSize.Height / 2;
//绘图
g.DrawString(labelStr, sFont, sBrush, screenLocation);
}
}
//面、多面的绘制注记
else
{
for (int i = 0; i < layer.Features.Count; i++)
{
//获取注记位置
PointD LabelLocation = new PointD();
LabelLocation.X = (layer.Features[i].Box.MinX + layer.Features[i].Box.MaxX) / 2;
LabelLocation.Y = (layer.Features[i].Box.MinY + layer.Features[i].Box.MaxY) / 2;
LabelLocation = FromMapPoint(LabelLocation);
PointF screenLocation = new PointF();
screenLocation.X = (float)LabelLocation.X;
screenLocation.Y = (float)LabelLocation.Y;
//获取注记文本大小，调整注记中心
string labelStr = layer.Table.Rows[i][sField].ToString();
SizeF labelSize = g.MeasureString(labelStr, sFont);
screenLocation.X -= labelSize.Width / 2;
screenLocation.Y -= labelSize.Height / 2;
//绘图
g.DrawString(labelStr, sFont, sBrush, screenLocation);
}
}
}
catch { throw new Exception(); }
}
/// <summary>
/// 简单渲染单个图层
/// </summary>
/// <param name="g"></param>
/// <param name="layer"></param>
private void RenderAsSimpleRenderer(Graphics g, Layer layer)
{
SimpleRenderer sRenderer = layer.Renderer as SimpleRenderer; // 强转，使图层渲染器为唯一值渲染器
//图层类型为点
if (layer.FeatureType == typeof(PointD))
{
PointSymbol pSymbol = sRenderer.Symbol as PointSymbol; //强转，使符号为点符号
for (int i = 0; i < layer.Features.Count; i++)
{
PointD point = layer.Features[i] as PointD;
//转换为屏幕坐标,绘制
PointD screenPoint = FromMapPoint(point);
PointF DrawPoint = new PointF((float)screenPoint.X, (float)screenPoint.Y);
pSymbol.DrawPoint(g, DrawPoint);
}
}
//图层类型为折线
else if (layer.FeatureType == typeof(Polyline))
{
LineSymbol lSymbol = sRenderer.Symbol as LineSymbol; //强转，使符号为线符号
for (int i = 0; i < layer.Features.Count; i++)
{
Polyline line = layer.Features[i] as Polyline; //获得折线
List <PointF> screenLine = new List <PointF>();
for (int j = 0; j < line.Data.Count; j++)
{
PointD point = FromMapPoint(line.Data[j]); //坐标转换
screenLine.Add(new PointF((float)point.X, (float)point.Y)); //添加到绘制队列
}
lSymbol.DrawLine(g, screenLine.ToArray()); //绘制
}
}
//图层类型为复合折线
else if (layer.FeatureType == typeof(MultiPolyline))
{
LineSymbol lSymbol = sRenderer.Symbol as LineSymbol; //强转，使符号为线符号
for (int i = 0; i < layer.Features.Count; i++)
{
MultiPolyline lines = layer.Features[i] as MultiPolyline; //获得复合折线
for (int j = 0; j < lines.Data.Count; j++)
{
Polyline line = lines.Data[j];
List <PointF> screenLine = new List <PointF>();
for (int k = 0; k < line.Data.Count; k++)
{
PointD point = FromMapPoint(line.Data[k]); //坐标转换
screenLine.Add(new PointF((float)point.X, (float)point.Y)); //添加到绘制队列
}
lSymbol.DrawLine(g, screenLine.ToArray()); //绘制
}
}
}
//图层类型为多边形
else if (layer.FeatureType == typeof(Polygon))
{
PolygonSymbol pSymbol = sRenderer.Symbol as PolygonSymbol; //强转，使符号为面符号
for (int i = 0; i < layer.Features.Count; i++)
{
Polygon polygon = layer.Features[i] as Polygon; //获得折线
List <PointF> screenPolygon = new List <PointF>();
for (int j = 0; j < polygon.Data.Count; j++)
{
PointD point = FromMapPoint(polygon.Data[j]); //坐标转换
screenPolygon.Add(new PointF((float)point.X, (float)point.Y)); //添加到绘制队列
}
pSymbol.DrawPolygon(g, screenPolygon.ToArray()); //绘制
}
}
//图层类型为复合多边形
else if (layer.FeatureType == typeof(MultiPolygon))
{
PolygonSymbol pSymbol = sRenderer.Symbol as PolygonSymbol; //强转，使符号为线符号
for (int i = 0; i < layer.Features.Count; i++)
{
MultiPolygon polygons = layer.Features[i] as MultiPolygon; //获得复合折线
for (int j = 0; j < polygons.Data.Count; j++)
{
Polygon polygon = polygons.Data[j];
List <PointF> screenPolygon = new List <PointF>();
for (int k = 0; k < polygon.Data.Count; k++)
{
PointD point = FromMapPoint(polygon.Data[k]); //坐标转换
screenPolygon.Add(new PointF((float)point.X, (float)point.Y)); //添加到绘制队列
}
pSymbol.DrawPolygon(g, screenPolygon.ToArray()); //绘制
}
}
}
}
