public XLayer ReadFile(string filename)
{
FileStream fsr = new FileStream(filename, FileMode.Open);
BinaryReader br = new BinaryReader(fsr);
//读文件头
MyFileHeader mfh = (MyFileHeader)XTools.FromBytes(br, typeof(MyFileHeader));
//读图层名称
string name = XTools.ReadString(br);
//读属性字段结构
List <XField> fields = ReadFields(mfh.FieldCount, br);
//定义图层
SHAPETYPE ShapeType =
(SHAPETYPE)Enum.Parse(typeof(SHAPETYPE),
mfh.ShapeType.ToString());
XExtent extent = new XExtent(
new XVertex(mfh.MinX, mfh.MinY),
new XVertex(mfh.MaxX, mfh.MaxY));
XLayer layer = new XLayer(name, ShapeType, extent, fields);
//读空间对象类型
for (int i = 0; i < mfh.FeatureCount; i++)
{
XSpatial spatial = ReadSpatial(ShapeType, br);
XAttribute attribute = ReadAttribute(br, fields);
layer.AddFeature(new XFeature(spatial, attribute));
}
//关闭文件并返回结果
br.Close();
fsr.Close();
return(layer);
}
void WriteFileHeader(XLayer layer, BinaryWriter bw)
{
MyFileHeader mfh = new MyFileHeader();
mfh.MinX = layer.Extent.GetMinX();
mfh.MinY = layer.Extent.GetMinY();
mfh.MaxX = layer.Extent.GetMaxX();
mfh.MaxY = layer.Extent.GetMaxY();
mfh.FeatureCount = layer.FeatureCount();
mfh.ShapeType = (int)(layer.ShapeType);
mfh.FieldCount = layer.Fields.Count;
bw.Write(XTools.ToBytes(mfh));
}
static void WriteFileHeader(GISLayer layer, BinaryWriter bw)//bw是与文件相连的文件写入工具
{
MyFileHeader mfh = new MyFileHeader();
mfh.MinX = layer.Extent.getMinX();
mfh.MinY = layer.Extent.getMinY();
mfh.MaxX = layer.Extent.getMaxX();
mfh.MaxY = layer.Extent.getMaxY();
mfh.FeatureCount = layer.FeatureCount();
mfh.Shapetype = (int)(layer.ShapeType);
mfh.FieldCount = layer.Fields.Count;
bw.Write(GISTools.ToBytes(mfh));
}
static void WriteFileHeader(GISLayer layer, BinaryWriter bw)
{
MyFileHeader mfh = new MyFileHeader();
mfh.MinX = layer.Extent.MinX;
mfh.MinY = layer.Extent.MinY;
mfh.MaxX = layer.Extent.MaxX;
mfh.MaxY = layer.Extent.MaxY;
mfh.FeatureCount = layer.Features.Count;
mfh.DrawAttributeOrNot = layer.DrawAttributeOrNot ? 1 : 0;
mfh.ShapeType = ShapeTypeToInt(layer.ShapeType);
mfh.FieldCount = layer.Fields.Count;
bw.Write(ToBytes(mfh));
}
public static GISLayer ReadFile(string filename)
{
FileStream fsr = new FileStream(filename, FileMode.Open);
BinaryReader br = new BinaryReader(fsr);
MyFileHeader mfh = (MyFileHeader)(GISTools.FromBytes(br, typeof(MyFileHeader))); //读取文件头
SHAPETYPE ShapeType = (SHAPETYPE)Enum.Parse(typeof(SHAPETYPE), mfh.Shapetype.ToString()); //获取空间实体类型shapetype和
GISExtent Extent = new GISExtent(mfh.MinX, mfh.MaxX, mfh.MinY, mfh.MaxY); //地图范围extent
string layername = GISTools.ReadString(br); //读取图层名
List <GISField> Fields = ReadFields(br, mfh.FieldCount); //读取字段信息
GISLayer layer = new GISLayer(layername, ShapeType, Extent, Fields);
ReadFeatures(layer, br, mfh.FeatureCount);
br.Close();
fsr.Close();
return(layer);
}
public static GISLayer ReadFile(string filename)
{
FileStream fsr = new FileStream(filename, FileMode.Open);
BinaryReader br = new BinaryReader(fsr);
MyFileHeader mfh = (MyFileHeader)(FromBytes(br, typeof(MyFileHeader)));
SHAPETYPE ShapeType = IntToShapeType(mfh.ShapeType);
GISExtent Extent = new GISExtent(new GISVertex(mfh.MinX, mfh.MinY), new GISVertex(mfh.MaxX, mfh.MaxY));
string layername = ReadString(br);
List <GISField> Fields = ReadFields(br, mfh.FieldCount);
GISLayer layer = new GISLayer(layername, ShapeType, Extent, Fields);
layer.DrawAttributeOrNot = (mfh.DrawAttributeOrNot == 1);
layer.Features = ReadFeatures(br, ShapeType, Fields, mfh.FeatureCount);
br.Close();
fsr.Close();
return(layer);
}