HELP about simple application

hi! i am creating an application that is like an alarm, for example an item in my listbox is "2010-10-24" and the date in my label is also "2010-10-24".

i would like to pop a message that there is a due paper in that date.

my problem is my code below, it does not find the item in listbox and the label equal. i wonder what is the problem, can anyone help me? thanks alot!

Code:

---

Dim connectionstring As String
        Dim query As String
        Dim adapter As MySqlDataAdapter
        Dim table As DataTable

       

        connectionstring = "server=localhost;uid=root;pwd=passw0rd;database=purchasing"
        query = "SELECT due_date FROM request ORDER BY due_date ASC"

        Try

            adapter = New MySqlDataAdapter(query, connectionstring)
            table = New DataTable
            adapter.Fill(table)

            ListBox1.DataSource = table
            ListBox1.DisplayMember = "due_date"


            For Each item In ListBox1.Items
                If item.ToString = Label1.Text Then
                    MsgBox("There is a Due Paper today")
             
                End If
            Next

---

try this. i think you'll find that item.ToString is "Datarow" or "Datarowview"
you need to cast item to that type + check the field against your label text

vb Code:

For Each item In ListBox1.Items
    msgbox(item.ToString)
    If item.ToString = Label1.Text Then
         MsgBox("There is a Due Paper today")
    End If
Next

vb Code:

DirectCast(item, DataRowView).Item("due_date")

hi paul! thanks for helping again.

msgbox only displays "system.data.datarowview"

can you explain what you said recently that "i need to cast item to that type + check the field against your label text"

by the way my

Code:

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label1.text  = Date.Now.ToString("yyyy-MM-dd")

---

see post #3

vb Code:

For Each item In ListBox1.Items 
    If DirectCast(item, DataRowView).Item("due_date") = Label1.Text Then 
        MsgBox("There is a Due Paper today") 
    End If 
Next

Code:

---

For Each item In ListBox1.Items

                Dim a As String = DirectCast(item, DataRowView).Item("due_date")

                MsgBox(a)

                If item.ToString = Label1.Text Then

                    MsgBox("There is a Due Paper today")

                End If

            Next

---

did i do it right? im sorry, i am not familiar with directcast.

well this code only displays the items in my listbox.

thanks bro! :D

is it possible that my items in my listbox will be updated automatically without opening again the application?

Quote:

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Originally Posted by markirving

is it possible that my items in my listbox will be updated automatically without opening again the application?

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you'd have to requery the db + rebind the listbox

hmm ok... so how am i suppose to write that? because my application is on the form_load.

is rebind like refresh?