DataTableReader.GetName(Int32) 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.
Gets the value of the specified column as a String.
public:
override System::String ^ GetName(int ordinal);
public override string GetName (int ordinal);
override this.GetName : int -> string
Public Overrides Function GetName (ordinal As Integer) As String
- ordinal
- Int32
The zero-based column ordinal.
The name of the specified column.
The index passed was outside the range of 0 to FieldCount - 1.
An attempt was made to read or access a column in a closed DataTableReader.
The following simple example includes a procedure that lists the names of all the columns within the specified DataTableReader
, and the column's ordinal position, to the Console window.
private static void DisplayColumnNames(DataTableReader reader)
{
// Given a DataTableReader, display column names.
for (int i = 0; i < reader.FieldCount; i++)
{
Console.WriteLine("{0}: {1}", i, reader.GetName(i));
}
}
Private Sub DisplayColumnNames(ByVal reader As DataTableReader)
' Given a DataTableReader, display column names.
For i As Integer = 0 To reader.FieldCount - 1
Console.WriteLine("{0}: {1}", i, reader.GetName(i))
Next
End Sub
The GetName
and GetOrdinal methods provide inverse functionality. That is, calling GetOrdinal
on the return value of calling GetName
should return the original parameter passed to GetName
; the same applies to calling the procedures in the opposite order.
Toode | Versioonid |
---|---|
.NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 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 |
Toote „.NET“ tagasiside
.NET on avatud lähtekoodiga projekt. Tagasiside andmiseks valige link: