用api得到局域网中可用sqlserver服务器列表_c#…

无意中找到了以前的一个C#程式，觉得好用发到这里以便和大家共享一下，其实这个代码我是抄别人过来的，原作者不详，觉得写的好就和大家共享一下了程式实现了用API来得到SqlServer服务器列表的功能，我觉得比用SQLDEMO组件更有意义，代码如下：

/// <summary>

/// 获取网内的数据库服务器名称

/// </summary>

public class SqlLocator

{

[System.Runtime.InteropServices.DllImport("odbc32.dll")]

private static extern short SQLAllocHandle(short hType, IntPtr inputHandle, out IntPtr outputHandle);

[System.Runtime.InteropServices.DllImport("odbc32.dll")]

private static extern short SQLSetEnvAttr(IntPtr henv, int attribute, IntPtr valuePtr, int strLength);

[System.Runtime.InteropServices.DllImport("odbc32.dll")]

private static extern short SQLFreeHandle(short hType, IntPtr handle);

[System.Runtime.InteropServices.DllImport("odbc32.dll",CharSet= System.Runtime.InteropServices.CharSet.Ansi)]

private static extern short SQLBrowseConnect(IntPtr hconn, System.Text.StringBuilder inString,

short inStringLength, System.Text.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";

private SqlLocator(){}

/// <summary>

/// 获取网内的数据库服务器名称，是个字符串数组。

/// </summary>

/// <returns></returns>

public static string[] GetServers()

{

string list = string.Empty;

IntPtr henv = IntPtr.Zero;

IntPtr hconn = IntPtr.Zero;

System.Text.StringBuilder inString = new System.Text.StringBuilder(SQL_DRIVER_STR);

System.Text.StringBuilder outString = new System.Text.StringBuilder(DEFAULT_RESULT_SIZE);

short inStringLength = (short) inString.Length;

short lenNeeded = 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, inString, inStringLength, outString,

DEFAULT_RESULT_SIZE, out lenNeeded))

{

if (DEFAULT_RESULT_SIZE < lenNeeded)

{

outString.Capacity = lenNeeded;

if (SQL_NEED_DATA != SQLBrowseConnect(hconn, inString, inStringLength, outString,

lenNeeded,out lenNeeded))

{

throw new ApplicationException("Unabled to aquire SQL Servers from ODBC driver.");

}

}

list = outString.ToString();

int start = list.IndexOf("{") 1;

int len = list.IndexOf("}") - start;

if ((start > 0) && (len > 0))

{

list = list.Substring(start,len);

}

else

{

list = string.Empty;

}

}

}

}

}

}

catch

{

list = string.Empty;

}

finally

{

if (hconn != IntPtr.Zero)

{

SQLFreeHandle(SQL_HANDLE_DBC,hconn);

}

if (henv != IntPtr.Zero)

标签：

版权申明：本站文章部分自网络，如有侵权，请联系：west999com@outlook.com
特别注意：本站所有转载文章言论不代表本站观点，本站所提供的摄影照片，插画，设计作品，如需使用，请与原作者联系，版权归原作者所有