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(); } }

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

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

Reference

MySqlDataReader Class
MySqlDataReader Members
Overload List

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