IDataReader.GetSchemaTable Method
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
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.DataTable
Public Function GetSchemaTable () As DataTable
A DataTable that describes the column metadata.
The IDataReader is closed.
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. |
Product | Versions |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0, 2.1 |
.NET feedback
.NET is an open source project. Select a link to provide feedback: