VB.Net用dataset1表行填充DataGridview

Question

Noob here, have imported SQL database as datasource into forms app but when I click preview no rows are shown.

Public Class Form1
   Private Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    'TODO: This line of code loads data into the "DataSet1.Ac_Billbook" table. You can move, or remove it, as needed.
    'Me.Ac_BillbookTableAdapter.Fill(Me.DataSet1.Ac_Billbook)
    For Each table In DataSet1.Tables
        ComboBox1.Items.Add(table.ToString)
    Next
  End Sub

  Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
      DataGridView1.DataSource = DataSet1.Tables(ComboBox1.SelectedItem)
     'DataGridView1.DataBind()
  End Sub
End Class

The idea is that I would be able to preview table fields by looking at a table and quickly seeing it.

Answer 1

You can break down the line where you assigning the table as datasource, so that you can use a breakpoint and use a "dataset visualizer" (small icon with magnifying glass will show it) feature of the VS to check the table content.

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Dim dt as New DataTable
    dt = DataSet1.Tables(ComboBox1.SelectedItem).DefaultView
    DataGridView1.DataSource = dt
End Sub

Put a Breakpoint on the line with "DataGridView1.DataSource = dt" and have a look, whether the datatable has the desired rows. If no data is there, also test with first table:

dt = DataSet1.Tables(0).DefaultView

If there are still no data, then you get nothing from your DB table(s).