reading error from table - vb.net- using OleDbDataReader

questionit

Hi

When i run the program, i get error on the statement inside Do While Loop. The piece of code from my application is:

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 Dim selectString As String

        selectString = "Select ContactName, Address from Customers"
 
        Dim cmd As OleDbCommand = New OleDbCommand(selectString, con)

        Dim reader As OleDbDataReader
 
        reader = cmd.ExecuteReader()
 
        Do While reader.Read() = True

            strName = reader("ContactName")

            strAddress = reader("Address")

        Loop

Object reference not set to an instance of an object

tlhintoq

Quote:

Object reference not set to an instance of an object

You need to initialize all your variables to *something* before you use them.
If you look at your variables after the break, Visual Studio will show you which one(s) are null.

reading error from table - vb.net- using OleDbDataReader

re: reading error from table - vb.net- using OleDbDataReader

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