Search(char[ ], Int64, Int64)

This instance method searches for a character pattern in the current instance of OracleClob.

Declaration

// C#
public Int64 Search(char [ ] val, Int64 offset, Int64 nth);

Parameters

val

The Unicode string being searched for.
offset

The 0-based offset (in characters) starting from which the OracleClob is searched.
nth

The specific occurrence (1-based) of the match for which the absolute offset (in characters) is returned.

Return Value

Returns the absolute offset of the start of the matched pattern (in characters) for the nth occurrence of the match. Otherwise, 0 is returned.

Exceptions

ObjectDisposedException - The object is already disposed.

InvalidOperationException - The OracleConnection is not open or has been closed during the lifetime of the object.

ArgumentOutOfRangeException - This exception is thrown if any of the following conditions exist:

The offset is less than 0.
The nth is less than or equal to 0.
The val.Length doubled is greater than 16383.
The nth is greater than or equal to OracleClob.MaxSize.
The offset is greater than or equal to OracleClob.MaxSize.

Remarks

The limit of the search pattern is 16383 bytes.

Example

// C#

using System;
using Oracle.DataAccess.Client;
using Oracle.DataAccess.Types;

class SearchSample
{
  static void Main()
  {
    string constr = "User Id=scott;Password=tiger;Data Source=oracle";
    OracleConnection con = new OracleConnection(constr);
    con.Open();

    OracleClob clob = new OracleClob(con);

    // Write 7 chars, starting at buffer offset 0
    char[] buffer = new char[7] {'a', 'b', 'c', 'd', 'a', 'b', 'c'};
    clob.Write(buffer, 0, 7);

    // Search for the 2nd occurrence of a char pattern 'bc'
    // starting at offset 1 in the OracleBlob
    char[] pattern = new char[2] {'b', 'c'};
    long posFound = clob.Search(pattern, 1, 2);

    // Prints "posFound = 6"
    Console.WriteLine("posFound = " + posFound);

    clob.Close();
    clob.Dispose();

    con.Close();
    con.Dispose();
  }
}

See Also: