GetDouble Method

Článek
09/27/2010

Gets the value of the specified column as a double-precision floating point number.

Namespace: System.Data.SqlServerCe
Assembly: System.Data.SqlServerCe (in System.Data.SqlServerCe.dll)

Syntax

'Declaration
Public Overrides Function GetDouble ( _
    ordinal As Integer _
) As Double
'Usage
Dim instance As SqlCeDataReader
Dim ordinal As Integer
Dim returnValue As Double

returnValue = instance.GetDouble(ordinal)

public override double GetDouble(
    int ordinal
)

public:
virtual double GetDouble(
    int ordinal
) override

abstract GetDouble : 
        ordinal:int -> float 
override GetDouble : 
        ordinal:int -> float

public override function GetDouble(
    ordinal : int
) : double

Parameters

ordinal
Type: System. . :: . .Int32
The zero-based column ordinal.

Return Value

Type: System. . :: . .Double
The value of the specified column.

Implements

IDataRecord. . :: . .GetDouble(Int32)

Exceptions

Exception	Condition
InvalidCastException	The specified cast is not valid.
SqlNullValueException	The value is null Nothing nullptr unit a null reference (Nothing in Visual Basic) .
InvalidOperationException	The operation is not valid. The SqlCeDataReader may be positioned after the last row in the result set.

Remarks

No conversions are performed; therefore the data retrieved must already be a double-precision floating point number.

Call IsDBNull to check for null values before calling this method.

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