Comments by __BrokenArrow__ (Top 17 by date)

Dim method As MethodInfo = type.GetMethod(strMethodName) """This is the line giving me the error code

Then what would you prescribe on my impossible solution? Lol we'll I am battling

Like this??

Dim oo As Object = New Object() {10}
Dim objInstance As Object = Activator.CreateInstance(type)

method.Invoke(objInstance, oo)

Where?

Imports System.Windows.Forms

Public Class ReflectionLib
Public Shared Function ShowX(ByVal x As Integer) As Boolean

Dim t As Boolean = True
Dim f As Boolean = False
Dim chk As Boolean
Dim retstring As String = ""

'' I just removed the code for the internet check'''
'' Partial of this is to get the string from my database located on the server and resend it to the application'''

If retstring = Nothing Then
chk = f
Else
chk = t
End If
Return chk & retstring
End Function
End Class

I have created the dll with this and played around but the same error occurs with the line
hh_m.Invoke(Nothing, New Object() {})

And I tried using a function with parameters and changeing the lines to something like this

Dim args as Object = New Object() {variable}
hh_m.Invoke(Nothing, args)

But still the same error...This function is supposed to check and validate a user input on my database for an activation...Trick is the dll should be located elsewhere on the hdd

I want to call a function which returns boolean using a variable supplied by the user but to no avail ... Here's the code


Try
Dim ass As Assembly = Assembly.LoadFile(Application.StartupPath & "\ReflectionLib.dll")
Dim t_sam As Type = ass.GetType("ReflectionLib")
Dim hh_m As MethodInfo = t_sam.GetMethod("ShowX", BindingFlags.Public Or BindingFlags.Static)
hh_m.Invoke(Nothing, New Object() {})
Catch ex As Exception
MessageBox.Show(ex.Message + ex.StackTrace + vbLf)
End Try

I keep getting Object reference not set to an instance of object error with this code

hh_m.Invoke(Nothing, New Object() {})

I want to call a function which returns boolean using a variable supplied by the user but to no avail ... Here's the code


Try
Dim ass As Assembly = Assembly.LoadFile(Application.StartupPath & "\ReflectionLib.dll")
Dim t_sam As Type = ass.GetType("ReflectionLib")
Dim hh_m As MethodInfo = t_sam.GetMethod("ShowX", BindingFlags.Public Or BindingFlags.Static)
hh_m.Invoke(Nothing, New Object() {})
Catch ex As Exception
MessageBox.Show(ex.Message + ex.StackTrace + vbLf)
End Try

I keep getting Object reference not set to an instance of object error with this code

hh_m.Invoke(Nothing, New Object() {})

By adding this to a click event of a button ...


Dim nitem as new listviewitem

nitem = listview1.items.add(combobox1.text)
'Repeat this for the amount of fields you have
nitem.subitems.add(combobox2.text)
nitem.subitems.add(textbox1.text)

nitem.dispose

NB! Just remember it's much easier to create the columns in the listview in design time

If you are using let's say an access database you can update the database table like this usin an sql statement an oledb.

Imports System.Data
Imports System.Data.OleDb

Public claas1

Private dbpath As String = "Location of database"
Private dbx1 As String = "Database Password"
Private m_conn As OleDbConnection
Private con_str As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & dbpath & ";Persist Security Info=True;Jet OLEDB:Database Password=" & dbx1

' You can Add as many comboboxes or textboxes as you require

Public Sub SaveData(ByVal cbo1 As Combobox, ByVal cbo2 As As Combobox)
m_conn = New OleDbConnection(con_str)

Dim strInsertSql As String = "Insert Into [tblUsers]([Username], [Password])Values('" & cbo1.text & "','" & cbo2.text & "')"

Dim cmd As New OleDbCommand(strInsertSql, m_conn)

Try
m_conn.Open()

cmd.ExecuteNonQuery

m_conn.Close()
Catch ex As Exception
MessageBox.Show(ex.Message & ex.StackTrace)
Finally
m_conn.Close()
End Try
End Sub

If this is not what you require please let me know

Do you want to add the data to a dataset then create a datatable or do you want to add the data from the comboboxes to a listview control and then update the datatable or update the database directly?

Do you mean to put the data in a Listview?