共用方式為

SqlCeDataReader.GetFloat Method

  • 發行項

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

Namespace: System.Data.SqlServerCe
Assembly: System.Data.SqlServerCe (in system.data.sqlserverce.dll)

Syntax

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

returnValue = instance.GetFloat(ordinal)

public override float GetFloat (
    int ordinal
)

public:
virtual float GetFloat (
    int ordinal
) override

public float GetFloat (
    int ordinal
)

public override function GetFloat (
    ordinal : int
) : float

Not applicable.

Parameters

  • ordinal
    The zero-based column ordinal.

Return Value

The value of the specified column.

Exceptions

Exception type Condition

InvalidCastException

The specified cast is not valid.

SqlNullValueException

The value is 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 single-precision floating point number.

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

Platforms

Windows CE, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows XP Professional x64 Edition, Windows XP SP2

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

Version Information

.NET Framework

Supported in: 3.0

.NET Compact Framework

Supported in: 2.0, 1.0

See Also

Reference

SqlCeDataReader Class
SqlCeDataReader Members
System.Data.SqlServerCe Namespace