DbDataReader.GetFieldValue<T>(Int32) Method
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Gets the value of the specified column as the requested type.
public:
generic <typename T>
virtual T GetFieldValue(int ordinal);
public virtual T GetFieldValue<T>(int ordinal);
abstract member GetFieldValue : int -> 'T
override this.GetFieldValue : int -> 'T
Public Overridable Function GetFieldValue(Of T) (ordinal As Integer) As T
- T
The type of the value to be returned.
- ordinal
- Int32
The zero-based column ordinal.
The value of the specified column.
The connection was dropped or closed during data retrieval.
-or-
The data reader was closed during data retrieval.
-or-
There is no data ready to be read (for example, the first Read() hasn't been called, or it returned false
).
-or-
The reader tried to read a previously-read column in sequential mode.
-or-
There was an asynchronous operation in progress. This applies to all Get* methods when running in sequential mode, as they could be called while reading a stream.
The column index is out of range.
The value returned by the database doesn't match or cannot be cast to T
.
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 | 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 |
UWP | 10.0 |
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