SqlDataReader.GetFieldValue<T>(Int32) Method

Definition

Namespace:: Microsoft.Data.SqlClient

Assembly:: Microsoft.Data.SqlClient.dll

Package:: Microsoft.Data.SqlClient v1.0.19269.1

Package:: Microsoft.Data.SqlClient v1.1.4

Package:: Microsoft.Data.SqlClient v2.0.1

Package:: Microsoft.Data.SqlClient v2.1.4

Package:: Microsoft.Data.SqlClient v3.0.1

Package:: Microsoft.Data.SqlClient v3.1.0

Package:: Microsoft.Data.SqlClient v4.0.1

Package:: Microsoft.Data.SqlClient v4.1.0

Package:: Microsoft.Data.SqlClient v5.0.0

Package:: Microsoft.Data.SqlClient v5.1.0

Package:: Microsoft.Data.SqlClient v5.2.0

Package:: Microsoft.Data.SqlClient v6.0.2

Source:: SqlDataReader.cs

Source:: SqlDataReader.cs

Source:: SqlDataReader.cs

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.

Synchronously gets the value of the specified column as a type. GetFieldValueAsync<T>(Int32, CancellationToken) is the asynchronous version of this method.

public:
generic <typename T>
 override T GetFieldValue(int i);

public override T GetFieldValue<T>(int i);

override this.GetFieldValue : int -> 'T

Public Overrides Function GetFieldValue(Of T) (i As Integer) As T

Type Parameters

T

The type of the value to be returned.

Parameters

i: Int32

The column to be retrieved.

Returns

The returned type object.

Exceptions

InvalidOperationException

The connection drops or is closed during the data retrieval.
The SqlDataReader is closed during the data retrieval.
There is no data ready to be read (for example, the first Read() hasn't been called, or returned false).
Tried to read a previously-read column in sequential mode.
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.

IndexOutOfRangeException

Trying to read a column that does not exist.

SqlNullValueException

The value of the column was null (IsDBNull(Int32) == true), retrieving a non-SQL type.

InvalidCastException

T doesn't match the type returned by SQL Server or cannot be cast.