Solved

How to set the selected text in a combo box in vb.net

Posted on 2014-07-29
2
1,028 Views
Last Modified: 2014-07-29
Hi all.

I would like to know how to select the text in a combo box that has just been entered in an input box using vb.net in Visual Studio 2010. As you can see towards the end of the code, I tried to set the selected record (cmbVendorName.SelectedIndex = cmbVendorName.FindString(newItem.ToString)) but when I run the windows form the combo box is still blank.

Code for loading combo box:
Private Sub cmbVendorName_Enter(sender As System.Object, e As System.EventArgs) Handles cmbVendorName.Enter

        Dim con As New SqlConnection
        Dim cmd As New SqlCommand
        Dim adapter As New SqlDataAdapter()
        Dim ds As New DataSet()

        con.ConnectionString = "Data Source=myserver;Initial Catalog=mydb;Integrated Security=True"

        con.Open()

        cmd.Connection = con

        cmd.CommandText = "SELECT  VendorName FROM Vendor WHERE Status = 'Active' AND Division = @Division ORDER BY VendorName"
        cmd.Parameters.AddWithValue("@Division", "Ticket")

        adapter.SelectCommand = cmd
        adapter.Fill(ds)
        adapter.Dispose()
        cmd.Dispose()

        con.Close()

        cmbVendorName.DataSource = ds.Tables(0)
        cmbVendorName.DisplayMember = "VendorName"

        cmbVendorName.SelectedIndex = -1

    End Sub

Open in new window


Code for clicking the add vendor button
Private Sub btnAddVendor_Click(sender As System.Object, e As System.EventArgs) Handles btnAddVendor.Click

        Dim itm As String
        itm = InputBox("Enter New vendor", "New Vendor")
        If itm.Trim <> "" Then AddVendor(itm)

    End Sub

    Sub AddVendor(ByVal newItem As String)


        Dim con1 As New SqlConnection
        Dim cmd1 As New SqlCommand

        con1.ConnectionString = "Data Source=myserver;Initial Catalog=mydb;Integrated Security=True"

        con1.Open()

        cmd1.Connection = con1

        cmd1.CommandText = "SELECT * FROM Vendor WHERE VendorName=@VendorName AND Division = @Division"
        cmd1.Parameters.AddWithValue("@VendorName", newItem)
        cmd1.Parameters.AddWithValue("@Division", "Ticket")

        Using reader As SqlDataReader = cmd1.ExecuteReader()
            If reader.HasRows Then
                MsgBox("Vendor name already exists", MsgBoxStyle.Exclamation, "Child Item Data Entry")
                Exit Sub
            End If
        End Using

        con1.Close()

        Dim con As New SqlConnection
        Dim cmd As New SqlCommand

        con.ConnectionString = "Data Source=myserver;Initial Catalog=mydb;Integrated Security=True"

        con.Open()

        cmd.Connection = con

        cmd.CommandText = "INSERT INTO Vendor(VendorName, Division)  VALUES (@VendorName,@Division)"

        cmd.Parameters.AddWithValue("@VendorName", newItem)
        cmd.Parameters.AddWithValue("@Division", "Ticket")

        cmd.ExecuteNonQuery()

        con.Close()

cmbVendorName.SelectedIndex = cmbVendorName.FindString(newItem.ToString)
End Sub

Open in new window

0
Comment
Question by:printmedia
2 Comments
 
LVL 69

Accepted Solution

by:
Éric Moreau earned 500 total points
ID: 40227241
but you are never adding the new value to the combo!

cmbVendorName.Items.Add(newItem.ToString)
cmbVendorName.Text = newItem.ToString()
0
 

Author Closing Comment

by:printmedia
ID: 40227255
Wow. Can't believe I missed that.

Thanks!
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article explains how to create and use a custom WaterMark textbox class.  The custom WaterMark textbox class allows you to set the WaterMark Background Color and WaterMark text at design time.   IMAGE OF WATERMARKS STEPS Create VB …
Microsoft Reports are based on a report definition, which is an XML file that describes data and layout for the report, with a different extension. You can create a client-side report definition language (*.rdlc) file with Visual Studio, and build g…
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now