private static QueryResultInfo GetQueryResultInfo_NetStandard(this IDataReader reader)
{
#if NETSTANDARD2_0
var colinfo = reader as IDbColumnSchemaGenerator;
if (colinfo != null)
{
var res = new QueryResultInfo();
foreach (var row in colinfo.GetColumnSchema())
{
var col = new QueryResultColumnInfo();
int size = row.ColumnSize ?? 0;
col.Name = row.ColumnName;
col.NotNull = !(row.AllowDBNull ?? true);
col.DataType = row.DataTypeName;
col.Size = size;
col.CommonType = ReaderDataType(row);
col.BaseColumnName = row.BaseColumnName;
col.BaseSchemaName = row.BaseSchemaName;
col.BaseTableName = row.BaseTableName;
col.BaseServerName = row.BaseServerName;
col.BaseCatalogName = row.BaseCatalogName;
if (row.IsAutoIncrement ?? false)
{
col.CommonType.SetAutoincrement(true);
col.AutoIncrement = true;
}
if (row.IsKey ?? false)
{
col.IsKey = true;
}
if (row.IsHidden ?? false)
{
col.IsHidden = true;
}
if (row.IsReadOnly ?? false)
{
col.IsReadOnly = true;
}
if (row.IsAliased ?? false)
{
col.IsAliased = true;
}
res.Columns.Add(col);
}
return(res);
}
return(null);
#else
retrun null;
#endif
}
private static QueryResultInfo GetQueryResultInfo_OnlyColumnNames(this IDataReader reader)
{
try
{
var res = new QueryResultInfo();
for (int i = 0; i < reader.FieldCount; i++)
{
var column = new QueryResultColumnInfo();
column.Name = reader.GetName(i);
res.Columns.Add(column);
}
return(res);
}
catch
{
return(null);
}
}
public static QueryResultInfo SchemaTableToInfo(DataTable schemaTable)
{
var res = new QueryResultInfo();
foreach (DataRow row in schemaTable.Rows.SortedByKey <DataRow, int>(row => Int32.Parse(row["ColumnOrdinal"].ToString())))
{
var col = new QueryResultColumnInfo();
int size = row.SafeString("ColumnSize").SafeIntParse();
col.Name = row.SafeString("ColumnName");
if (row["AllowDBNull"] is bool notNull)
{
col.NotNull = !notNull;
}
int dataTypeNameIndex = row.Table.Columns.GetOrdinal("DataTypeName");
int dataTypeIndex = row.Table.Columns.GetOrdinal("DataType");
if (dataTypeNameIndex >= 0)
{
col.DataType = row[dataTypeNameIndex].SafeToString();
}
else if (dataTypeIndex >= 0)
{
col.DataType = (row[dataTypeIndex] as Type)?.Name ?? "String";
}
else
{
col.DataType = "String";
}
col.Size = size;
col.CommonType = ReaderDataType(row);
col.BaseColumnName = row.SafeString("BaseColumnName");
col.BaseSchemaName = row.SafeString("BaseSchemaName");
col.BaseTableName = row.SafeString("BaseTableName");
col.BaseServerName = row.SafeString("BaseServerName");
col.BaseCatalogName = row.SafeString("BaseCatalogName");
if (row.SafeBool("IsAutoIncrement", false))
{
col.CommonType.SetAutoincrement(true);
col.AutoIncrement = true;
}
if (row.SafeBool("IsKey", false))
{
col.IsKey = true;
}
if (row.SafeBool("IsHidden", false))
{
col.IsHidden = true;
}
if (row.SafeBool("IsReadOnly", false))
{
col.IsReadOnly = true;
}
if (row.SafeBool("IsAliased", false))
{
col.IsAliased = true;
}
res.Columns.Add(col);
}
return(res);
}