DataTableReader.GetName(Int32) Method
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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.
Προϊόν | Εκδόσεις |
---|---|
.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 |
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