IDataReader.GetSchemaTable Method
Definition
Important
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Returns a DataTable that describes the column metadata of the IDataReader.
Returns null if the executed command returned no resultset, or after NextResult() returns false.
public:
System::Data::DataTable ^ GetSchemaTable();public System.Data.DataTable? GetSchemaTable ();public System.Data.DataTable GetSchemaTable ();abstract member GetSchemaTable : unit -> System.Data.DataTablePublic Function GetSchemaTable () As DataTableReturns
A DataTable that describes the column metadata.
Exceptions
The IDataReader is closed.
Remarks
The implementation of GetSchemaTable method for the .NET Framework Data Provider for OLE DB maps to the OLE DB IColumnsRowset::GetColumnsRowset method, while implementations for other .NET Framework data providers do not use an OLE DB provider layer. The order in which GetSchemaTable returns metadata about each column in a table, and the DataReader columns that are returned, vary depending on which data provider you use. The following table lists data providers and members that implement GetSchemaTable.
| Data Provider | Member |
|---|---|
| .NET Data Provider for ODBC | OdbcDataReader.GetSchemaTable. |
| .NET Data Provider for OLE DB | OleDbDataReader.GetSchemaTable. |
| .NET Data Provider for Oracle | OracleDataReader.GetSchemaTable. |
| .NET Data Provider for SQL Server | SqlDataReader.GetSchemaTable. |
