Signature not compatible with delegate

Question

0.00/5 (No votes)

See more:

I am getting the following error:

"Method 'Private Sub updatetext(text As Object)' dose Not have a signature compatible with delegate Delegate Sub MethodInvoker()"

Please Help Me.
-----------my code------------------

VB

Public Sub search()
        Try

            cmdoledb.CommandText = "SELECT NAME FROM table1 WHERE ID=" & CInt(txtid.Text)
            cmdoledb.CommandType = CommandType.Text
            cmdoledb.Connection = cnnoledb
            Dim rdroledb As OleDbDataReader = cmdoledb.ExecuteReader
            While rdroledb.Read = True
                updatetext(rdroledb.Item(0).ToString)
                Thread.Sleep(2000)
                tictac()
            End While
            t1.Abort()
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
        cmdoledb.Dispose()
    End Sub
    Private Sub updatetext(ByVal text)
        If Me.InvokeRequired Then
            Me.Invoke(New MethodInvoker(AddressOf updatetext),New Object(){text})        
Else
        txtnam.Text &= text
        End If
    End Sub

Posted 19-May-10 12:17pm

ehsan6000

Updated 19-May-10 19:35pm

Sandeep Mewara

v2

Add a Solution

Comments

Sandeep Mewara 20-May-10 1:36am

As the error suggests check for the signature!

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Wayne Gaylard · Answer 1 · 2010-05-19T21:54:00

The MethodInvoker is a generic Delegate with no arguments (signature). If you want to pass arguments to a delegate then you need to create your own Invoker Delegate Like this :

VB.NET

Private Delegate Sub UpdateTextInvoker(ByVal MyText As String)'Create your own Invoker Delegate 

    Private Sub UpdateText(ByVal MyText As String)

        If Me.InvokeRequired Then
            Me.Invoke(New UpdateTextInvoker(AddressOf UpdateText), New String() {MyText})'Call your custom invoker
        Else
            txtName.Text = MyText
        End If

    End Sub

Hope this helps

Happy Coding