Question

My database access methods are in class file. This file is has a separate project name: Usr_mysqladapter. In another website project I import the class file as a dll and call the function in the class file by creating an object.

The class file contains the following function:

Public Function readfunctioid(ByVal query As String) As DataTable
    Try
        connecttodb()
        mysqlcmd = New MySqlCommand(query, con)
        da = New MySqlDataAdapter(mysqlcmd)
        dt = New DataTable
        da.Fill(dt)
    Catch ex As Exception
        Throw ex
    Finally
        disconnect()
    End Try
    Return dt
End Function

The website projects imports the dll as follows:

  Imports Usr_mysqladapter

  Dim obj As Usr_mysqladapter.Class1 = New Usr_mysqladapter.Class1

My button click calls the function like this:

dt = obj.readfunctioid("select fld_functionid  from tbl_users_function_permission")

Unfortunately, I am getting error. How do I access the function in the class file from my website project?

Answer 1

In your website project simply do like…..

Dim MyCustomSqlAdapter As = New MyCustomClass()

This is when your class is CALLED MyCustomClass
And the INSTANCE is called MyCustomSqlAdapter

Then in button do like….

dt = MyCustomSqlAdapter.readfunctioid("select fld_functionid  from tbl_users_function_permission")