Попробуйте использовать ODBC
| Код |
using System;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace BrowserSQL
{
public class BrowseSQL
{
[DllImport("odbc32.dll")]
private static extern short SQLAllocHandle(short hType, IntPtr inputHandle, out IntPtr outputHandle);
[DllImport("odbc32.dll")]
private static extern short SQLSetEnvAttr(IntPtr henv, int attribute, IntPtr valuePtr, int strLength);
[DllImport("odbc32.dll")]
private static extern short SQLFreeHandle(short hType, IntPtr handle);
[DllImport("odbc32.dll",CharSet=CharSet.Ansi)]
private static extern short SQLBrowseConnect(IntPtr hconn, StringBuilder inString,
short inStringLength, StringBuilder outString, short outStringLength,
out short outLengthNeeded);
private const short SQL_HANDLE_ENV = 1;
private const short SQL_HANDLE_DBC = 2;
private const int SQL_ATTR_ODBC_VERSION = 200;
private const int SQL_OV_ODBC3 = 3;
private const short SQL_SUCCESS = 0;
private const short SQL_NEED_DATA = 99;
private const short DEFAULT_RESULT_SIZE = 1024;
private const string SQL_DRIVER_STR = "DRIVER=SQL SERVER";
public BrowseSQL()
{
}
public static String[] GetServers()
{
string[] ret_list = null;
string scan_str = string.Empty;
IntPtr henv = IntPtr.Zero;
IntPtr hconn = IntPtr.Zero;
StringBuilder inp_str = new StringBuilder(SQL_DRIVER_STR);
StringBuilder out_str = new StringBuilder(DEFAULT_RESULT_SIZE);
short inp_str_length = (short) inp_str.Length;
short len = 0;
try
{
if (SQL_SUCCESS == SQLAllocHandle(SQL_HANDLE_ENV, henv, out henv))
{
if (SQL_SUCCESS == SQLSetEnvAttr(henv,SQL_ATTR_ODBC_VERSION,(IntPtr)SQL_OV_ODBC3,0))
{
if (SQL_SUCCESS == SQLAllocHandle(SQL_HANDLE_DBC, henv, out hconn))
{
if (SQL_NEED_DATA == SQLBrowseConnect(hconn, inp_str, inp_str_length, out_str,
DEFAULT_RESULT_SIZE, out len))
{
if (DEFAULT_RESULT_SIZE < len)
{
out_str.Capacity = len;
if (SQL_NEED_DATA != SQLBrowseConnect(hconn, inp_str, inp_str_length, out_str,
len,out len))
{
throw new ApplicationException("Поиск SQL-серверов невозможен.");
}
}
scan_str = out_str.ToString();
int start = scan_str.IndexOf("{") + 1;
int lnght = scan_str.IndexOf("}") - start;
if ((start > 0) && (lnght > 0))
{
scan_str = scan_str.Substring(start,lnght);
}
else
{
scan_str = string.Empty;
}
}
}
}
}
}
catch (Exception ex)
{
scan_str = string.Empty;
}
finally
{
if (hconn != IntPtr.Zero)
{
SQLFreeHandle(SQL_HANDLE_DBC,hconn);
}
if (henv != IntPtr.Zero)
{
SQLFreeHandle(SQL_HANDLE_ENV,hconn);
}
}
if (scan_str.Length > 0)
{
ret_list = scan_str.Split(",".ToCharArray());
}
return ret_list;
}
}
}
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