internal DualCoTaskMem(UnsafeNativeMethods.IDBSchemaRowset dbSchemaRowset, out int schemaCount, out IntPtr schemaGuids, out IntPtr schemaRestrictions, out OleDbHResult hr) : this()
{
Bid.Trace("<oledb.IDBSchemaRowset.GetSchemas|API|OLEDB>\n");
hr = dbSchemaRowset.GetSchemas(out schemaCount, out this.handle, out this.handle2);
schemaGuids = base.handle;
schemaRestrictions = this.handle2;
Bid.Trace("<oledb.IDBSchemaRowset.GetSchemas|API|OLEDB|RET> %08X{HRESULT}\n", hr);
}
public void Dispose()
{
object o = this._unknown;
this._unknown = null;
this._value = null;
if (o != null)
{
Marshal.ReleaseComObject(o);
}
}
public void Dispose()
{
object unknown = _unknown;
_unknown = null !;
_value = null !;
if (null != unknown)
{
Marshal.ReleaseComObject(unknown);
}
}
public void Dispose()
{
object o = this._unknown;
this._unknown = null;
this._value = null;
if (o != null)
{
Marshal.ReleaseComObject(o);
}
}
internal SchemaSupport[] GetSchemaRowsetInformation()
{
OleDbConnectionString constr = ConnectionString;
SchemaSupport[] supportedSchemas = constr.SchemaSupport;
if (null != supportedSchemas)
{
return(supportedSchemas);
}
using (IDBSchemaRowsetWrapper wrapper = IDBSchemaRowset())
{
UnsafeNativeMethods.IDBSchemaRowset dbSchemaRowset = wrapper.Value;
if (null == dbSchemaRowset)
{
return(null); // IDBSchemaRowset not supported
}
OleDbHResult hr;
int schemaCount = 0;
IntPtr schemaGuids = ADP.PtrZero;
IntPtr schemaRestrictions = ADP.PtrZero;
using (DualCoTaskMem safehandle = new DualCoTaskMem(dbSchemaRowset, out schemaCount, out schemaGuids, out schemaRestrictions, out hr))
{
dbSchemaRowset = null;
if (hr < 0)
{ // ignore infomsg
ProcessResults(hr);
}
supportedSchemas = new SchemaSupport[schemaCount];
if (ADP.PtrZero != schemaGuids)
{
for (int i = 0, offset = 0; i < supportedSchemas.Length; ++i, offset += ODB.SizeOf_Guid)
{
IntPtr ptr = ADP.IntPtrOffset(schemaGuids, i * ODB.SizeOf_Guid);
supportedSchemas[i]._schemaRowset = (Guid)Marshal.PtrToStructure(ptr, typeof(Guid));
}
}
if (ADP.PtrZero != schemaRestrictions)
{
for (int i = 0; i < supportedSchemas.Length; ++i)
{
supportedSchemas[i]._restrictions = Marshal.ReadInt32(schemaRestrictions, i * 4);
}
}
}
constr.SchemaSupport = supportedSchemas;
return(supportedSchemas);
}
}
internal DataTable GetSchemaRowset(Guid schema, object[] restrictions)
{
IntPtr hscp;
Bid.ScopeEnter(out hscp, "<oledb.OleDbConnectionInternal.GetSchemaRowset|INFO> %d#, schema=%ls, restrictions\n", ObjectID, schema);
try {
if (null == restrictions) // MDAC 62243
{
restrictions = new object[0];
}
DataTable dataTable = null;
using (IDBSchemaRowsetWrapper wrapper = IDBSchemaRowset()) {
UnsafeNativeMethods.IDBSchemaRowset dbSchemaRowset = wrapper.Value;
if (null == dbSchemaRowset)
{
throw ODB.SchemaRowsetsNotSupported(Provider);
}
UnsafeNativeMethods.IRowset rowset = null;
OleDbHResult hr;
Bid.Trace("<oledb.IDBSchemaRowset.GetRowset|API|OLEDB> %d#\n", ObjectID);
hr = dbSchemaRowset.GetRowset(ADP.PtrZero, ref schema, restrictions.Length, restrictions, ref ODB.IID_IRowset, 0, ADP.PtrZero, out rowset);
Bid.Trace("<oledb.IDBSchemaRowset.GetRowset|API|OLEDB|RET> %08X{HRESULT}\n", hr);
if (hr < 0) // ignore infomsg
{
ProcessResults(hr);
}
if (null != rowset)
{
using (OleDbDataReader dataReader = new OleDbDataReader(Connection, null, 0, CommandBehavior.Default)) {
dataReader.InitializeIRowset(rowset, ChapterHandle.DB_NULL_HCHAPTER, IntPtr.Zero);
dataReader.BuildMetaInfo();
dataReader.HasRowsRead();
dataTable = new DataTable();
dataTable.Locale = CultureInfo.InvariantCulture;
dataTable.TableName = OleDbSchemaGuid.GetTextFromValue(schema);
OleDbDataAdapter.FillDataTable(dataReader, dataTable);
}
}
return(dataTable);
}
}
finally {
Bid.ScopeLeave(ref hscp);
}
}
internal DataTable GetSchemaRowset(Guid schema, object[] restrictions)
{
if (null == restrictions)
{
restrictions = Array.Empty <object>();
}
DataTable dataTable = null;
using (IDBSchemaRowsetWrapper wrapper = IDBSchemaRowset())
{
UnsafeNativeMethods.IDBSchemaRowset dbSchemaRowset = wrapper.Value;
if (null == dbSchemaRowset)
{
throw ODB.SchemaRowsetsNotSupported(Provider);
}
UnsafeNativeMethods.IRowset rowset = null;
OleDbHResult hr;
hr = dbSchemaRowset.GetRowset(ADP.PtrZero, ref schema, restrictions.Length, restrictions, ref ODB.IID_IRowset, 0, ADP.PtrZero, out rowset);
if (hr < 0)
{ // ignore infomsg
ProcessResults(hr);
}
if (null != rowset)
{
using (OleDbDataReader dataReader = new OleDbDataReader(Connection, null, 0, CommandBehavior.Default))
{
dataReader.InitializeIRowset(rowset, ChapterHandle.DB_NULL_HCHAPTER, IntPtr.Zero);
dataReader.BuildMetaInfo();
dataReader.HasRowsRead();
dataTable = new DataTable();
dataTable.Locale = CultureInfo.InvariantCulture;
dataTable.TableName = OleDbSchemaGuid.GetTextFromValue(schema);
OleDbDataAdapter.FillDataTable(dataReader, dataTable);
}
}
return(dataTable);
}
}
// IDBSchemaRowset.GetSchemas
internal DualCoTaskMem(UnsafeNativeMethods.IDBSchemaRowset dbSchemaRowset, out int schemaCount, out IntPtr schemaGuids, out IntPtr schemaRestrictions, out OleDbHResult hr) : this()
{
hr = dbSchemaRowset.GetSchemas(out schemaCount, out base.handle, out this.handle2);
schemaGuids = base.handle;
schemaRestrictions = this.handle2;
}
internal IDBSchemaRowsetWrapper(object unknown)
{
_unknown = unknown;
_value = (unknown as UnsafeNativeMethods.IDBSchemaRowset) !;
}
public void Dispose() {
object unknown = _unknown;
_unknown = null;
_value = null;
if (null != unknown) {
Marshal.ReleaseComObject(unknown);
}
}
internal IDBSchemaRowsetWrapper(object unknown) {
_unknown = unknown;
_value = (unknown as UnsafeNativeMethods.IDBSchemaRowset);
}
internal IDBSchemaRowsetWrapper(object unknown)
{
this._unknown = unknown;
this._value = unknown as UnsafeNativeMethods.IDBSchemaRowset;
}
internal IDBSchemaRowsetWrapper(object unknown)
{
this._unknown = unknown;
this._value = unknown as UnsafeNativeMethods.IDBSchemaRowset;
}
