列表视图vbnet

Question

I'm having trouble viewing the saved items in ListView.

The 1 is the Item No and the c001 is the Item Code but:

What's wrong with my code?

ListView1.Items.Clear()

sql = "SELECT * FROM inventory"
Try
    dbcomm = New MySqlCommand(sql, dbconn)
    dbread = dbcomm.ExecuteReader()

    While dbread.Read
        ListView1.Items.Add(dbread("itemNo"))
        ListView1.Items.Add(dbread("itemCode"))
    End While

    dbread.Close()
Catch ex As Exception
    MsgBox("Error in collecting data from Database. Error is :" & ex.Message)
    dbread.Close()
    Exit Sub
End Try

Answer 1

You should add your second item in your SubItems rather than Items . Change this:

While dbread.Read
    ListView1.Items.Add(dbread("itemNo")) 'placed in row #1
    ListView1.Items.Add(dbread("itemCode")) 'placed in row #2
End While

Into:

While dbread.Read
    ListView1.Items.Add(dbread("itemNo")).SubItems.Add(dbread("itemCode")) 'both placed in row #1
End While

This way, you place them side-by-side. Not one row after another.

Answer 2

Each time you call Items.Add it adds a completely new item (it also returns a reference to the item you added)

What you need to do is to set the SubItem text of each item you add. You can use the returned item reference to do this like so (requires Option Infer On ):

    While dbread.Read
        Dim lvi = ListView1.Items.Add(dbread("itemNo"))
        lvi.SubItems.Add(dbread("itemCode"))
    End While