GetDouble(Int32) Method

In This Topic

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

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Overrides Function GetDouble( _
   ByVal i As Integer _
) As Double

public override double GetDouble( 
   int i
)

Parameters

i

Return Value

The value of the specified column.

Remarks

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

Example

csharp

static void GetMyDouble(MySqlConnection myConnection) {
  MySqlCommand cmd = new MySqlCommand("SELECT * FROM Test.AllTypes");
  cmd.Connection = myConnection;
  myConnection.Open();
  try {
    MySqlDataReader reader = cmd.ExecuteReader();
    reader.Read();
    double recievedDouble = reader.GetDouble(reader.GetOrdinal("DoubleCol"));
    reader.Close();
  }
  finally {
    myConnection.Close();
  }
}

Visual Basic

Shared Sub GetMyDouble(ByVal myConnection As MySqlConnection)
  Dim cmd As New MySqlCommand("SELECT * FROM Test.AllTypes")
  cmd.Connection = myConnection
  myConnection.Open()
  Try
    Dim reader As MySqlDataReader = cmd.ExecuteReader
    reader.Read()
    Dim recievedDouble As Double = reader.GetDouble(reader.GetOrdinal("DoubleCol"))
    reader.Close()
  Finally
    myConnection.Close()
  End Try
End Sub

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

MySqlDataReader Class
MySqlDataReader Members
Overload List

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