// create DataColumns
// add DataColumns to DataTable
// add schema information to DataTable
// generate unique column names
private void BuildSchemaTableInfoTable(int columnCount, IntPtr columnInfos, bool filterITypeInfo, bool filterChapters) {
Debug.Assert(0 < columnCount, "BuildSchemaTableInfoTable - no column");
int rowCount = 0;
MetaData[] metainfo = new MetaData[columnCount];
// for every column, build an equivalent to tagDBCOLUMNINFO
tagDBCOLUMNINFO dbColumnInfo = new tagDBCOLUMNINFO();
for (int i = 0, offset = 0; i < columnCount; ++i, offset += ODB.SizeOf_tagDBCOLUMNINFO) {
Marshal.PtrToStructure(ADP.IntPtrOffset(columnInfos, offset), dbColumnInfo);
#if WIN32
if (0 >= (int) dbColumnInfo.iOrdinal) {
#else
if (0 >= (long) dbColumnInfo.iOrdinal) {
#endif
continue;
}
if (OleDbDataReader.DoColumnDropFilter(dbColumnInfo.dwFlags)) {
continue;
}
if (null == dbColumnInfo.pwszName) {
dbColumnInfo.pwszName = "";
}
if (filterITypeInfo && (ODB.DBCOLUMN_TYPEINFO == dbColumnInfo.pwszName)) { // MDAC 65306
continue;
}
if (filterChapters && (NativeDBType.HCHAPTER == dbColumnInfo.wType)) {
continue; // filter chapters in IRowset from IDBSchemaRowset for DumpToTable
}
bool islong = OleDbDataReader.IsLong(dbColumnInfo.dwFlags);
bool isfixed = OleDbDataReader.IsFixed(dbColumnInfo.dwFlags);
NativeDBType dbType = NativeDBType.FromDBType(dbColumnInfo.wType, islong, isfixed);
MetaData info = new MetaData();
info.columnName = dbColumnInfo.pwszName;
info.type = dbType;
info.ordinal = dbColumnInfo.iOrdinal;
#if WIN32
info.size = (int)dbColumnInfo.ulColumnSize;
#else
long maxsize = (long) dbColumnInfo.ulColumnSize;
info.size = (((maxsize < 0) || (Int32.MaxValue < maxsize)) ? Int32.MaxValue : (int)maxsize);
#endif
info.flags = dbColumnInfo.dwFlags;
info.precision = dbColumnInfo.bPrecision;
info.scale = dbColumnInfo.bScale;
info.kind = dbColumnInfo.columnid.eKind;
switch(dbColumnInfo.columnid.eKind) {
case ODB.DBKIND_GUID_NAME:
case ODB.DBKIND_GUID_PROPID:
case ODB.DBKIND_GUID:
info.guid = dbColumnInfo.columnid.uGuid;
break;
default:
Debug.Assert(ODB.DBKIND_PGUID_NAME != dbColumnInfo.columnid.eKind, "OLE DB providers never return pGuid-style bindings.");
Debug.Assert(ODB.DBKIND_PGUID_PROPID != dbColumnInfo.columnid.eKind, "OLE DB providers never return pGuid-style bindings.");
info.guid = Guid.Empty;
break;
}
switch(dbColumnInfo.columnid.eKind) {
case ODB.DBKIND_GUID_PROPID:
case ODB.DBKIND_PROPID:
info.propid = dbColumnInfo.columnid.ulPropid;
break;
case ODB.DBKIND_GUID_NAME:
case ODB.DBKIND_NAME:
if (ADP.PtrZero != dbColumnInfo.columnid.ulPropid) {
info.idname = Marshal.PtrToStringUni(dbColumnInfo.columnid.ulPropid);
}
else {
info.idname = null;
}
break;
default:
info.propid = ADP.PtrZero;
break;
}
metainfo[rowCount] = info;
#if DEBUG
if (AdapterSwitches.DataSchema.TraceVerbose) {
Debug.WriteLine("OleDbDataReader[" + info.ordinal.ToInt64().ToString(CultureInfo.InvariantCulture) + ", " + dbColumnInfo.pwszName + "]=" + dbType.enumOleDbType.ToString() + "," + dbType.dataSourceType + ", " + dbType.wType);
}
#endif
rowCount++;
}
if (rowCount < columnCount) { // shorten names array appropriately
MetaData[] tmpinfo = new MetaData[rowCount];
for (int i = 0; i < rowCount; ++i) {
tmpinfo[i] = metainfo[i];
}
metainfo = tmpinfo;
}
_visibleFieldCount = rowCount;
_metadata = metainfo;
}
private void BuildSchemaTableInfoTable(int columnCount, IntPtr columnInfos, bool filterITypeInfo, bool filterChapters)
{
int index = 0;
System.Data.OleDb.MetaData[] dataArray = new System.Data.OleDb.MetaData[columnCount];
tagDBCOLUMNINFO structure = new tagDBCOLUMNINFO();
int num4 = 0;
for (int i = 0; num4 < columnCount; i += ODB.SizeOf_tagDBCOLUMNINFO)
{
Marshal.PtrToStructure(ADP.IntPtrOffset(columnInfos, i), structure);
if ((0 >= ((int) structure.iOrdinal)) || DoColumnDropFilter(structure.dwFlags))
{
goto Label_01EC;
}
if (structure.pwszName == null)
{
structure.pwszName = "";
}
if ((filterITypeInfo && ("DBCOLUMN_TYPEINFO" == structure.pwszName)) || (filterChapters && (0x88 == structure.wType)))
{
goto Label_01EC;
}
bool isLong = IsLong(structure.dwFlags);
bool isFixed = IsFixed(structure.dwFlags);
NativeDBType type = NativeDBType.FromDBType(structure.wType, isLong, isFixed);
System.Data.OleDb.MetaData data = new System.Data.OleDb.MetaData {
columnName = structure.pwszName,
type = type,
ordinal = structure.iOrdinal,
size = (int) structure.ulColumnSize,
flags = structure.dwFlags,
precision = structure.bPrecision,
scale = structure.bScale,
kind = structure.columnid.eKind
};
switch (structure.columnid.eKind)
{
case 0:
case 1:
case 6:
data.guid = structure.columnid.uGuid;
break;
default:
data.guid = Guid.Empty;
break;
}
switch (structure.columnid.eKind)
{
case 0:
case 2:
if (!(ADP.PtrZero != structure.columnid.ulPropid))
{
break;
}
data.idname = Marshal.PtrToStringUni(structure.columnid.ulPropid);
goto Label_01E3;
case 1:
case 5:
data.propid = structure.columnid.ulPropid;
goto Label_01E3;
default:
data.propid = ADP.PtrZero;
goto Label_01E3;
}
data.idname = null;
Label_01E3:
dataArray[index] = data;
index++;
Label_01EC:
num4++;
}
if (index < columnCount)
{
System.Data.OleDb.MetaData[] dataArray2 = new System.Data.OleDb.MetaData[index];
for (int j = 0; j < index; j++)
{
dataArray2[j] = dataArray[j];
}
dataArray = dataArray2;
}
this._visibleFieldCount = index;
this._metadata = dataArray;
}
