Filtering using CheckedListBox

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It can only filter one checked item. When I check two items, it only shows the first item that I check. Any idea on how the logic would be?

For item As Integer = 0 To CheckedListBox1.CheckedItems.Count - 1
            Dim sql = "select * from Status where Stat= '" & CheckedListBox1.CheckedItems(item) & "'"
            Dim dt As DataTable
            Dim ds As New DataSet
            cnn = New OleDbConnection(connectionString)

            Try
                cnn.Open()
                adptr = New OleDbDataAdapter(sql, cnn)
                adptr.Fill(ds)
                adptr.Dispose()
                cnn.Close()

                dt = ds.Tables(0)
                Form5.DataGridView1.DataSource = dt

            Catch ex As Exception
                MsgBox(ex.ToString)
            End Try
            Form5.DataGridView1.Visible = True
        Next

Posted 22-Feb-13 2:45am

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CHill60 · Accepted Answer · 2013-02-22T02:58:00

Solution 1

You're only populating the DataGridView for individual checked items ... the contents of DataTable dt change each time you go around the loop.

You would be better off building up a list of the checked items first and using that list in a single sql statement e.g. ...

SQL

Dim statList As String = "("
For item As Integer = 0 To CheckedListBox1.CheckedItems.Count - 1
    statList += "'" & CheckedListBox1.CheckedItems(item) & "',"
Next
statList = statList.Substring(0, statList.Length - 1) + ")"

Dim sql = "select * from Status where Stat in " + statList

Posted 22-Feb-13 2:58am

CHill60

Comments

Member 12198986 22-Jan-17 10:52am

do it same for c#...Please

CHill60 27-Jan-17 11:07am

If you have a question of your own you should really use the Ask a Question link. However, I think what you need is similar to the following (untested)):

            var statList = "(";
            for (var item = 0; item < CheckedListBox1.CheckedItems.Count; item++)
                statList += "'" + CheckedListBox1.CheckedItems[item] + "',";
            statList = statList.Substring(0, statList.Length - 1) + ")";
            var sql = "select * from Status where Stat in " + statList;

or

            var statList = CheckedListBox1.CheckedItems.Cast<object>().Aggregate("(", (current, t) => current + ("'" + t + "',"));
            statList = statList.Substring(0, statList.Length - 1) + ")";
            var sql = "select * from Status where Stat in " + statList;