This instance method copies data from the current OracleBlob instance to the provided OracleBlob object with the specified source offset, destination offset, and character amounts.

Declaration

// C#
public Int64 CopyTo(Int64 src_offset,OracleBlob obj,Int64 dst_offset,
   Int64 amount);

Parameters

• src_offset

  The offset (in bytes) in the current instance, from which the data is read.

• obj

  The OracleBlob object to which the data is copied.

• dst_offset

  The offset (in bytes) at which the OracleBlob object is copied.

• amount

  The amount of data to be copied.

Return Value

The return value is the amount copied.

Exceptions

ObjectDisposedException - The object is already disposed.

InvalidOperationException - The parameter has a different connection than the object, OracleConnection is not opened, or OracleConnection has been reopened.

ArgumentOutOfRangeException - The src_offset, the dst_offset, or the amount parameter is less than 0.

Remarks

If the dst_offset is beyond the end of the OracleBlob data, spaces are written into the OracleBlob until the dst_offset is met.

The offsets are 0-based. No character conversion is performed by this operation.

The provided object and the current instance must be using the same connection; that is, the same OracleConnection object.

Example

// C#
 
using System;
using Oracle.DataAccess.Client;
using Oracle.DataAccess.Types;
 
class CopyToSample
{
  static void Main()
  {
    string constr = "User Id=scott;Password=tiger;Data Source=oracle";
    OracleConnection con = new OracleConnection(constr);
    con.Open();
 
    OracleBlob blob1 = new OracleBlob(con);
    OracleBlob blob2 = new OracleBlob(con);
 
    // Write 4 bytes, starting at buffer offset 0
    byte[] buffer = new byte[4] {1, 2, 3, 4};    
    blob1.Write(buffer, 0, 4);
 
    // Copy 2 bytes from byte 0 of blob1 to byte 1 of blob2
    blob1.CopyTo(0, blob2, 1, 2);
 
    byte[] copyBuffer = blob2.Value;    
 
    //Prints "Value = 012"
    Console.Write("Value = ");
    for(int index = 0; index < copyBuffer.Length; index++)
    {
      Console.Write(copyBuffer[index]);
    }
    Console.WriteLine();
    
    blob1.Close();
    blob1.Dispose();
 
    blob2.Close();
    blob2.Dispose();
 
    con.Close();
    con.Dispose();
  }
}