VB.Net Fill List with SQL Query - vb.net

Question

I'm trying to fill either a combobox or a list with an sql query, I can get them to produce the number of entries pulled but not the names of the entries, and not multiple entries.
The code in question is simple:
Dim RegisterApt As New StudentsDataSetTableAdapters.TestTableAdapter
Try
txtTestPull.Items.Add(RegisterApt.FillByStudentsTest(StudentsDataSet.Test, StudentInsert.School, StudentInsert.School))
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
What I can't seem to find online is how to do this.
All I'd like to do is pull results using my sql query which I know works,
and push the resulting rows to the list or combobox

Answer 1

Here's the step by step on how to fill a ComboBox and a DataGridView using ADO.Net. I use the Northwind database as a sample.
1. Add a DataSet
Right-click your project and choose Add, then choose New Item. Choose Dataset in the next window.
2. Add a DataTable
Connect to your database and drag a table into the middle area. In this example, I choose the Customers table.
3. Add a query
Right-click your DataTable, and choose Add, then choose Query.
Choose Use SQL statements in the next window, click Next.
Choose SELECT which returns rows in the next window, click Next.
4. Write a query
SELECT CustomerID, CompanyName, ContactName, ContactTitle, Address, City, Region, PostalCode, Country, Phone, Fax
FROM dbo.Customers
WHERE Country = #Country
I add a WHERE clause to filter the data. Click Next.
Gives names to your methods. I use FillByCountry in the first textbox and GetDataByCountry in the second textbox.
Save your project and build it first because you're adding a new DataSet.
5. Add some controls in your form
Add a Button, a TextBox, a ComboBox and a DataGridView. You can change the names, but I use the default names in this example.
6. Write some code to get the data and bind it to ComboBox and DataGridView
Public Class Form1
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
' declare a DataTable
Dim dt As New DataSet1.CustomersDataTable
' declare a DataAdapter
Dim da As New DataSet1TableAdapters.CustomersTableAdapter
' use the DataAdapter to fill the DataTable
da.FillByCountry(dt, TextBox1.Text)
' bind the DataTable to a DataGridView
DataGridView1.DataSource = dt
' bind the DataTable to a ComboBox
ComboBox1.DataSource = dt
ComboBox1.ValueMember = "CustomerID"
ComboBox1.DisplayMember = "CompanyName"
End Sub
End Class
7. Run the project and see the result