public static byte[] DatasetToXML(DataSet DS)
{
using (MemoryStream memstream = new MemoryStream())
{
string InFile = null;
string OutFile = null;
try
{
if (ConfigurationManager.AppSettings["CompressDatasets"] == "1")
{
InFile = Path.GetTempFileName();
OutFile = Path.GetTempFileName();
DS.WriteXml(InFile, XmlWriteMode.WriteSchema);
CompressionUtils.CompressFile(InFile, OutFile);
using (FileStream filestream = new FileStream(OutFile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
try
{
byte[] buffer = Encoding.Default.GetBytes(CompressionUtils.COMPRESSION_SIGNATURE);
memstream.Write(buffer, 0, buffer.Length);
buffer = new byte[filestream.Length];
filestream.Read(buffer, 0, buffer.Length);
memstream.Write(buffer, 0, buffer.Length);
}
finally
{
filestream.Close();
}
}
}
else
{
DS.WriteXml(memstream, XmlWriteMode.WriteSchema);
}
}
finally
{
memstream.Close();
try
{
if (!String.IsNullOrEmpty(InFile))
{
File.Delete(InFile);
}
} catch {}
try
{
if (!String.IsNullOrEmpty(OutFile))
{
File.Delete(OutFile);
}
} catch {}
}
return(memstream.ToArray());
}
}
public static DataSet XMLToDataset(byte[] XML)
{
string inFile = null, outFile = null;
try
{
DataSet ds = new DataSet();
if (Encoding.Default.GetString(XML, 0, CompressionUtils.COMPRESSION_SIGNATURE.Length) == CompressionUtils.COMPRESSION_SIGNATURE)
{
inFile = Path.GetTempFileName();
outFile = Path.GetTempFileName();
using (FileStream fs = new FileStream(inFile, FileMode.Open, FileAccess.Write))
{
fs.Write(
XML,
CompressionUtils.COMPRESSION_SIGNATURE.Length,
XML.Length - CompressionUtils.COMPRESSION_SIGNATURE.Length
);
}
CompressionUtils.DecompressFile(inFile, outFile);
ds.ReadXml(outFile, XmlReadMode.ReadSchema);
}
else
{
using (MemoryStream ms = new MemoryStream(XML))
{
ds.ReadXml(ms, XmlReadMode.ReadSchema);
}
}
return(ds);
}
finally
{
if (!String.IsNullOrEmpty(inFile) && File.Exists(inFile))
{
try {
File.Delete(inFile);
} catch {}
}
if (!String.IsNullOrEmpty(outFile) && File.Exists(outFile))
{
try {
File.Delete(outFile);
} catch {}
}
}
}
public static byte[] StringToXML(string s)
{
byte [] result;
if (ConfigurationManager.AppSettings["CompressDatasets"] == "1")
{
// El sistema está configurado para utilizar compresión
string InFile = null;
string OutFile = null;
try
{
InFile = Path.GetTempFileName();
OutFile = Path.GetTempFileName();
using (StreamWriter streamwriter = new StreamWriter(InFile))
{
try
{
streamwriter.Write(s);
}
finally
{
streamwriter.Close();
}
}
CompressionUtils.CompressFile(InFile, OutFile);
List <byte> list = new List <byte>();
list.AddRange(Encoding.Default.GetBytes(CompressionUtils.COMPRESSION_SIGNATURE));
using (FileStream filestream = new FileStream(OutFile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
try
{
byte[] buffer = new byte[filestream.Length];
filestream.Read(buffer, 0, buffer.Length);
list.AddRange(buffer);
}
finally
{
filestream.Close();
}
}
result = list.ToArray();
}
finally
{
try
{
if (!String.IsNullOrEmpty(InFile))
{
File.Delete(InFile);
}
} catch {}
try
{
if (!String.IsNullOrEmpty(OutFile))
{
File.Delete(OutFile);
}
} catch {}
}
}
else
{
result = Encoding.Default.GetBytes(s);
}
return(result);
}
public static string XMLToString(byte[] XML)
{
string inFile = null, outFile = null;
try
{
string result = string.Empty;
if (Encoding.Default.GetString(XML, 0, CompressionUtils.COMPRESSION_SIGNATURE.Length) == CompressionUtils.COMPRESSION_SIGNATURE)
{
inFile = Path.GetTempFileName();
outFile = Path.GetTempFileName();
using (FileStream fs = new FileStream(inFile, FileMode.Open, FileAccess.Write))
{
try
{
fs.Write(
XML,
CompressionUtils.COMPRESSION_SIGNATURE.Length,
XML.Length - CompressionUtils.COMPRESSION_SIGNATURE.Length
);
}
finally
{
fs.Close();
}
}
CompressionUtils.DecompressFile(inFile, outFile);
using (FileStream fs = new FileStream(outFile, FileMode.Open, FileAccess.Read))
{
try
{
StringBuilder sb = new StringBuilder();
const int BUFFER_SIZE = 4096;
byte[] buffer = new byte[BUFFER_SIZE];
int bytesRead = 0;
while (0 < (bytesRead = fs.Read(buffer, 0, BUFFER_SIZE)))
{
sb.Append(Encoding.Default.GetString(buffer, 0, bytesRead));
}
result = sb.ToString();
}
finally
{
fs.Close();
}
}
}
else
{
result = Encoding.Default.GetString(XML);
}
return(result);
}
finally
{
if (!String.IsNullOrEmpty(inFile) && File.Exists(inFile))
{
try {
File.Delete(inFile);
} catch {}
}
if (!String.IsNullOrEmpty(outFile) && File.Exists(outFile))
{
try {
File.Delete(outFile);
} catch {}
}
}
}
