私は同じ問題を抱えていました。私がしたことは、パラメーターのすべての int を long に置き換えることでした。
古い呼び出し:
[DllImport("odbc32.dll")]
internal static extern int SQLDataSources(int EnvHandle, int Direction, StringBuilder ServerName, int ServerNameBufferLenIn, ref int ServerNameBufferLenOut, StringBuilder Driver, int DriverBufferLenIn, ref int DriverBufferLenOut);
[DllImport("odbc32.dll")]
internal static extern int SQLAllocEnv(ref int EnvHandle);
新しい通話:
[DllImport("odbc32.dll")]
internal static extern int SQLDataSources(long EnvHandle, long Direction, StringBuilder ServerName, long ServerNameBufferLenIn, ref long ServerNameBufferLenOut, StringBuilder Driver, long DriverBufferLenIn, ref long DriverBufferLenOut);
[DllImport("odbc32.dll")]
internal static extern int SQLAllocEnv(ref long EnvHandle);
32 ビット DSN は 64 ビット コールには表示されません。
これは私が使用している方法です(Windows 8 x64を実行しています):
[DllImport("odbc32.dll")]
internal static extern int SQLDataSources(long EnvHandle, long Direction, StringBuilder ServerName, long ServerNameBufferLenIn,
ref long ServerNameBufferLenOut, StringBuilder Driver, long DriverBufferLenIn, ref long DriverBufferLenOut);
[DllImport("odbc32.dll")]
internal static extern int SQLAllocEnv(ref long EnvHandle);
//[DllImport("odbc32.dll")]
//internal static extern int SQLDataSources(int EnvHandle, int Direction, StringBuilder ServerName, int ServerNameBufferLenIn,
// ref int ServerNameBufferLenOut, StringBuilder Driver, int DriverBufferLenIn, ref int DriverBufferLenOut);
//[DllImport("odbc32.dll")]
//internal static extern int SQLAllocEnv(ref int EnvHandle);
public static List<ODBC_System_DSN_Entry> ListODBCsources()
{
List<ODBC_System_DSN_Entry> entries = new List<ODBC_System_DSN_Entry>();
long envHandle = 0;
const long SQL_FETCH_NEXT = 1;
const long SQL_FETCH_FIRST_SYSTEM = 32;
if (SQLAllocEnv(ref envHandle) != -1)
{
long ret;
StringBuilder serverName = new StringBuilder(1024);
StringBuilder driverName = new StringBuilder(1024);
long snLen = 0;
long driverLen = 0;
ret = SQLDataSources(envHandle, SQL_FETCH_FIRST_SYSTEM, serverName, serverName.Capacity, ref snLen,
driverName, driverName.Capacity, ref driverLen);
while (ret == 0)
{
//System.Windows.Forms.MessageBox.Show(serverName + System.Environment.NewLine + driverName);
entries.Add(new ODBC_System_DSN_Entry(serverName.ToString(), driverName.ToString()));
ret = SQLDataSources(envHandle, SQL_FETCH_NEXT, serverName, serverName.Capacity, ref snLen,
driverName, driverName.Capacity, ref driverLen);
}
return entries;
}
return null;
}
public struct ODBC_System_DSN_Entry
{
internal String _server;
internal String _driver;
internal ODBC_System_DSN_Entry(String server, String driver)
{
_server = server;
_driver = driver;
}
public String Server { get { return _server; } }
public String Driver { get { return _driver; } }
}