public EsriBundleFile(EsriBundleFileConfig config = null)
{
NewFileMode = true;
if (config == null)
{
Config = new EsriBundleFileConfig();
Config.PacketSize = 128;
}
else
{
Config = config;
}
}
public EsriBundleFile(string filePath)
{
FilePath = filePath;
NewFileMode = false;
Config = new EsriBundleFileConfig();
Config.PacketSize = 128;
//尝试从文件名字中读取开始行列号
try
{
EsriBundleHelper.ComputeOrigin(Path.GetFileName(filePath), out Config.StartCol, out Config.StartRow);
}
catch (Exception)
{
}
}
public EsriBundleFile(string filePath, EsriBundleFileConfig config)
: this(filePath)
{
Config = config;
}
/// <summary>
/// 读取文件头行列号
/// </summary>
/// <param name="dataStream"></param>
private void ReadColAndRowExtent(Stream dataStream, EsriBundleFileConfig config)
{
dataStream.Seek(44, SeekOrigin.Begin);
// 44-47为开始行
byte[] tempBytes = new byte[4];
dataStream.Read(tempBytes, 0, 4);
config.StartRow = BitConverter.ToInt32(tempBytes, 0);
// 48-51为结束行
dataStream.Read(tempBytes, 0, 4);
config.EndRow = BitConverter.ToInt32(tempBytes, 0);
// 52-55为开始列
dataStream.Read(tempBytes, 0, 4);
config.StartCol = BitConverter.ToInt32(tempBytes, 0);
// 56-59为结束列
dataStream.Read(tempBytes, 0, 4);
config.EndCol = BitConverter.ToInt32(tempBytes, 0);
}