Question

I am facing a problem displaying the result of my “select *” query on the form . Here is my code:

           Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As     System.EventArgs) Handles Button2.Click

    myconnection = New SqlConnection("server=PARTH-PC\SQLEXPRESS;uid=sa;pwd=parth;database=college")

    myconnection.Open()
    mycommand = New SqlCommand("SELECT * from [demo3]",myconnection)
    Dim mySqlDataAdapter As New SqlDataAdapter(mycommand)
    Dim mydsStudent As New DataSet()

    DataGridView2.DataSource = mydsStudent
    Me.Controls.Add(DataGridView2)
    ra = mycommand.ExecuteNonQuery()
    MessageBox.Show("Data displayed" & ra)

    myconnection.Close()
End Sub

But when I write this code and run my form I am not able to see any records present in my database tables being displayed on my form. I have inserted a DataGridView on my form . What changes should I do to my code ? Can Anyone help me ?

Thanks in advance

Answer 1

When you are working with a DataAdapter, you need to call the Fill() method for it to fill a DataSet/DataTable. After you initialize the DataSet, make this call:

mySqlDataAdapter.Fill(mydsStudent)

Also, take out your ExecuteNonQuery() call.

EDIT: Try something like this.

Dim myconn As New SqlConnection(yourConnectionStringHere)
Dim myTable As New DataTable()
Dim myCmd As New SqlCommand()
myCmd.Connection = myconn
myCmd.CommandText = "select * from demo3"

Dim myAdapater As New SqlDataAdapter(myCmd)
myAdapter.Fill(myTable)

DataGridView2.DataSource = myTable