override public DataTable GetDataSources()
{
#if MONO
timeoutTime = 0;
throw new NotImplementedException();
#else
(new NamedPermissionSet("FullTrust")).Demand(); // SQLBUDT 244304
char[] buffer = null;
StringBuilder strbldr = new StringBuilder();
Int32 bufferSize = 1024;
Int32 readLength = 0;
buffer = new char[bufferSize];
bool more = true;
bool failure = false;
IntPtr handle = ADP.PtrZero;
RuntimeHelpers.PrepareConstrainedRegions();
try {
timeoutTime = TdsParserStaticMethods.GetTimeoutSeconds(timeoutSeconds);
RuntimeHelpers.PrepareConstrainedRegions();
try {} finally {
handle = SNINativeMethodWrapper.SNIServerEnumOpen();
}
if (ADP.PtrZero != handle)
{
while (more && !TdsParserStaticMethods.TimeoutHasExpired(timeoutTime))
{
readLength = SNINativeMethodWrapper.SNIServerEnumRead(handle, buffer, bufferSize, ref more);
if (readLength > bufferSize)
{
failure = true;
more = false;
}
else if (0 < readLength)
{
strbldr.Append(buffer, 0, readLength);
}
}
}
}
finally {
if (ADP.PtrZero != handle)
{
SNINativeMethodWrapper.SNIServerEnumClose(handle);
}
}
if (failure)
{
Debug.Assert(false, "GetDataSources:SNIServerEnumRead returned bad length");
Bid.Trace("<sc.SqlDataSourceEnumerator.GetDataSources|ERR> GetDataSources:SNIServerEnumRead returned bad length, requested %d, received %d", bufferSize, readLength);
throw ADP.ArgumentOutOfRange("readLength");
}
return(ParseServerEnumString(strbldr.ToString()));
#endif
}
public override DataTable GetDataSources()
{
new NamedPermissionSet("FullTrust").Demand();
char[] wStr = null;
StringBuilder builder = new StringBuilder();
int pcbBuf = 0x400;
int charCount = 0;
wStr = new char[pcbBuf];
bool fMore = true;
bool flag = false;
IntPtr ptrZero = ADP.PtrZero;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
this.timeoutTime = TdsParserStaticMethods.GetTimeoutSeconds(30);
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
ptrZero = SNINativeMethodWrapper.SNIServerEnumOpen();
}
if (ADP.PtrZero != ptrZero)
{
while (fMore && !TdsParserStaticMethods.TimeoutHasExpired(this.timeoutTime))
{
charCount = SNINativeMethodWrapper.SNIServerEnumRead(ptrZero, wStr, pcbBuf, ref fMore);
if (charCount > pcbBuf)
{
flag = true;
fMore = false;
}
else if (0 < charCount)
{
builder.Append(wStr, 0, charCount);
}
}
}
}
finally
{
if (ADP.PtrZero != ptrZero)
{
SNINativeMethodWrapper.SNIServerEnumClose(ptrZero);
}
}
if (flag)
{
Bid.Trace("<sc.SqlDataSourceEnumerator.GetDataSources|ERR> GetDataSources:SNIServerEnumRead returned bad length, requested %d, received %d", pcbBuf, charCount);
throw ADP.ArgumentOutOfRange("readLength");
}
return(ParseServerEnumString(builder.ToString()));
}
/// <summary>
/// Retrieves a DataTable containing information about all visible SQL Server instances
/// </summary>
/// <returns></returns>
internal static DataTable GetDataSources()
{
(new NamedPermissionSet("FullTrust")).Demand(); // SQLBUDT 244304
char[] buffer = null;
StringBuilder strbldr = new();
int bufferSize = 1024;
int readLength = 0;
buffer = new char[bufferSize];
bool more = true;
bool failure = false;
IntPtr handle = ADP.s_ptrZero;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
long s_timeoutTime = TdsParserStaticMethods.GetTimeoutSeconds(ADP.DefaultCommandTimeout);
RuntimeHelpers.PrepareConstrainedRegions();
try
{ }
finally
{
handle = SNINativeMethodWrapper.SNIServerEnumOpen();
SqlClientEventSource.Log.TryTraceEvent("<sc.{0}.{1}|INFO> {2} returned handle = {3}.",
nameof(SqlDataSourceEnumeratorNativeHelper),
nameof(GetDataSources),
nameof(SNINativeMethodWrapper.SNIServerEnumOpen), handle);
}
if (handle != ADP.s_ptrZero)
{
while (more && !TdsParserStaticMethods.TimeoutHasExpired(s_timeoutTime))
{
readLength = SNINativeMethodWrapper.SNIServerEnumRead(handle, buffer, bufferSize, out more);
SqlClientEventSource.Log.TryTraceEvent("<sc.{0}.{1}|INFO> {2} returned 'readlength':{3}, and 'more':{4} with 'bufferSize' of {5}",
nameof(SqlDataSourceEnumeratorNativeHelper),
nameof(GetDataSources),
nameof(SNINativeMethodWrapper.SNIServerEnumRead),
readLength, more, bufferSize);
if (readLength > bufferSize)
{
failure = true;
more = false;
}
else if (readLength > 0)
{
strbldr.Append(buffer, 0, readLength);
}
}
}
}
finally
{
if (handle != ADP.s_ptrZero)
{
SNINativeMethodWrapper.SNIServerEnumClose(handle);
SqlClientEventSource.Log.TryTraceEvent("<sc.{0}.{1}|INFO> {2} called.",
nameof(SqlDataSourceEnumeratorNativeHelper),
nameof(GetDataSources),
nameof(SNINativeMethodWrapper.SNIServerEnumClose));
}
}
if (failure)
{
Debug.Assert(false, $"{nameof(GetDataSources)}:{nameof(SNINativeMethodWrapper.SNIServerEnumRead)} returned bad length");
SqlClientEventSource.Log.TryTraceEvent("<sc.{0}.{1}|ERR> {2} returned bad length, requested buffer {3}, received {4}",
nameof(SqlDataSourceEnumeratorNativeHelper),
nameof(GetDataSources),
nameof(SNINativeMethodWrapper.SNIServerEnumRead),
bufferSize, readLength);
throw ADP.ArgumentOutOfRange(StringsHelper.GetString(Strings.ADP_ParameterValueOutOfRange, readLength), nameof(readLength));
}
return(ParseServerEnumString(strbldr.ToString()));
}