Windows Develop Bookmark and Share   
 index > Windows Forms General > Find SQL Server Name
 

Find SQL Server Name

Hi ,

I do not want to define a constant connection string , is there any function or

component that could return server name ?

Azadanus  Monday, June 25, 2007 7:02 AM

Hi Azadanus,

To get all the SQL SERVER in the local area network, try this:

Code Snippet

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() { }

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)

{

SQLFreeHandle(SQL_HANDLE_ENV, hconn);

}

}

string[] array = null;

if (list.Length > 0)

{

array = list.Split(',');

}

return array;

}

}

Hope this helps.

Regards.

No. You would always store your connection string in the app config file.

nobugz  Monday, June 25, 2007 9:02 AM

Hi Azadanus,

To get all the SQL SERVER in the local area network, try this:

Code Snippet

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() { }

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)

{

SQLFreeHandle(SQL_HANDLE_ENV, hconn);

}

}

string[] array = null;

if (list.Length > 0)

{

array = list.Split(',');

}

return array;

}

}

Hope this helps.

Regards.

Hi ,

Iwill use it . Thanks for your consideration .

Azadanus  Monday, October 15, 2007 9:44 PM

You can use google to search for other answers

Custom Search

More Threads

• datagridview refreshing problem
• Display flickering
• Set accessor is not called for Byte[]
• Creating/Removing Objects at run time
• variables with preceeding underscore line ( _ )
• ListBox custom scroll bar?
• Can one master control contain multiple controls?
• Fit View
• User Control
• problems with Timer