internal static DBMSAccessTypeMappingCollection LoadFromTable(System.Data.DataTable dt)
{
DBMSAccessTypeMappingCollection col = new DBMSAccessTypeMappingCollection();
DataColumn provtype = Schema.DBSchemaProvider.GetColumn(dt, "ProviderDbType", true);
DataColumn name = Schema.DBSchemaProvider.GetColumn(dt, "TypeName", true);
DataColumn runtime = Schema.DBSchemaProvider.GetColumn(dt, "DataType", true);
DataColumn native = Schema.DBSchemaProvider.GetColumn(dt, "NativeDataType", true);
foreach (DataRow row in dt.Rows)
{
DBMSAccessTypeMapping map = new DBMSAccessTypeMapping();
map.NativeType = Schema.DBSchemaProvider.GetColumnIntValue(row, native);
map.TypeName = Schema.DBSchemaProvider.GetColumnStringValue(row, name);
map.ProviderType = Schema.DBSchemaProvider.GetColumnIntValue(row, provtype);
string type = Schema.DBSchemaProvider.GetColumnStringValue(row, runtime);
if (!string.IsNullOrEmpty(type))
{
map.RuntimeType = Type.GetType(type, false);
}
col.Add(map);
}
return(col);
}
/// <summary>
/// Fills the view info with the meta data Columns info
/// </summary>
/// <param name="aview"></param>
/// <param name="dtColumns"></param>
protected override void FillViewColumns(DBSchemaViewColumnCollection aview, DataTable dtColumns)
{
DataColumn ColumnNameColumn = GetColumn(dtColumns, "COLUMN_NAME", true);
DataColumn OrdinalPositionColumn = GetColumn(dtColumns, "ORDINAL_POSITION", true);
DataColumn DefaultValueColumn = GetColumn(dtColumns, "COLUMN_HASDEFAULT", false);
DataColumn IsNullableColumn = GetColumn(dtColumns, "IS_NULLABLE", true);
DataColumn DataTypeColumn = GetColumn(dtColumns, "DATA_TYPE", true);
DataColumn MaxCharacterLengthColumn = GetColumn(dtColumns, "CHARACTER_MAXIMUM_LENGTH", false);
DataColumn IsReadOnly = GetColumn(dtColumns, "ISREADONLY", false);
foreach (DataRow row in dtColumns.Rows)
{
DBSchemaViewColumn col = new DBSchemaViewColumn();
col.Name = GetColumnStringValue(row, ColumnNameColumn);
col.OrdinalPosition = GetColumnIntValue(row, OrdinalPositionColumn);
col.DefaultValue = GetColumnStringValue(row, DefaultValueColumn);
col.Nullable = GetColumnBoolValue(row, IsNullableColumn);
int type = GetColumnIntValue(row, DataTypeColumn, -1);
DBMSAccessTypeMapping map = null;
if (type > 0 && this.Types.TryGetType(type, out map))
{
col.NativeType = map.TypeName;
col.DbType = GetDbTypeForNativeType(map.TypeName, string.Empty);
if (null == map.RuntimeType)
{
col.Type = GetSystemTypeForNativeType(map.TypeName);
}
else
{
col.Type = map.RuntimeType;
if (col.DbType == DbType.Object)
{
col.DbType = DBHelper.GetDBTypeForRuntimeType(col.Type);
}
}
}
col.Size = GetColumnIntValue(row, MaxCharacterLengthColumn);
col.ReadOnly = GetColumnBoolValue(row, IsReadOnly);
col.HasDefault = GetColumnBoolValue(row, DefaultValueColumn);
aview.Add(col);
}
}
