Vb.Net Update Command Problem

[Auguy]

The Physician table has PhysicianPk as Int(11). I'm getting an System.InvalidCastException: Conversion from string "physicianPK" to type Integer is not invalid. Why does it think PhysicianPk is a string? I also tried all of the Int16,24,32,64 types.

Here is the code

 Dim adapter As MySqlDataAdapter = New MySqlDataAdapter()

    ' Create the SelectCommand. 
    Dim command As MySqlCommand = New MySqlCommand( _
        "SELECT * FROM Physician", connection)

    ' Create the UpdateCommand.
    command = New MySqlCommand( _
        "UPDATE Physician SET LastName = @LastName, FirstName = @FirstName " & _
        "WHERE PhysicianPK = @oldPhysicianPK", connection)

    Try
      ' Add the parameters for the UpdateCommand.
      command.Parameters.Add("@PhysicianPK", MySqlDbType.Int24, "PhysicianPK")
      command.Parameters.Add("@LastName", MySqlDbType.VarChar, 20, "LastName")
      command.Parameters.Add("@FirstName", MySqlDbType.VarChar, 15, "FirstName")
      Dim parameter As MySqlParameter = command.Parameters.Add( _
          "@oldPhysicianPK", MySqlDbType.Int24, "PhysicianPK")
      parameter.SourceVersion = DataRowVersion.Original
    Catch ex As Exception
      MessageBox.Show(ex.ToString)
    End Try

Auguy
Sylvania/Toledo Ohio

 

[feherke]

Hi

Why does it think PhysicianPk is a string?

This is not MySQL related problem. In most of the languages character literals enclosed in double quotes are considered string.

In case PhysicianPK is a variable containing an integer value, just remove the double quotes :

command.Parameters.Add("@PhysicianPK", MySqlDbType.Int24, PhysicianPK)

For further assistance in this problem, better post in a forum dedicated to Visual Basic.

Feherke.
feherke.ga

 

[ChrisHirst]

better post in a forum dedicated to Visual Basic.

Which is forum796

Chris.

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Time flies like an arrow, however, fruit flies like a banana.
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[Auguy]

Thanks, I will do that.

Auguy
Sylvania/Toledo Ohio