title: The Selected Index Changed is not firing
body: <p>The Selected Index Changed is not firing.  The Drop Down List is initializing and can scroll to the next value revealing the next Selected Index but no DropDownList1_SelectedIndexChanged enabling of the subroutine.</p>
  
  <p>Default.aspx</p>
  
  <pre><code>&lt;asp:DropDownList ID="DropDownList1" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" AutoPostBack="true" runat="server"&gt;&lt;/asp:DropDownList&gt;
  </code></pre>
  
  <p>Default.aspx.vb</p>
  
  <pre><code>Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
      If Not IsPostBack Then
      Dim connStr, cmdStr As String
      Dim ds As New DataSet
      connStr = "connection string works"
      Try
          cmdStr = "SELECT [idt],[col1] FROM [test];"
          Using conn As New SqlConnection(connStr)
              Using cmd As New SqlCommand(cmdStr, conn)
                  conn.Open()
                  cmd.ExecuteNonQuery()
                  Using da As New SqlDataAdapter(cmd)
                      da.Fill(ds)
                      DropDownList1.DataSource = ds.Tables(0)
                      DropDownList1.DataTextField = "idt"
                      DropDownList1.DataValueField = "col1"
                      DropDownList1.DataBind()
                  End Using
                  cmd.Dispose()
                  conn.Close()
                  conn.Dispose()
              End Using
          End Using
      Catch ex As Exception
          TextBox1.Text = ex.Message
      End Try
      End if
  End Sub
  Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged
      Dim datetimesi As String = "01-01-2014 00:00:00"
      Dim col1si As String = "0"
      Dim col2si As String = "0"
      Dim col3si As String = "0"
      Dim connStr, cmdStr As String
      connStr = "connection string works"
      Try
          cmdStr = "SELECT [datetime],[col1],[col2],[col3] FROM [test] WHERE [idt]=@idt;"
          Using conn As New SqlConnection(connStr)
              Using cmd As New SqlCommand(cmdStr, conn)
                  conn.Open()
                  cmd.Parameters.AddWithValue("@idt", DropDownList1.SelectedItem.Text)
                  cmd.ExecuteNonQuery()
                  Using rdr = cmd.ExecuteReader()
                      While rdr.Read()
                          datetimesi = rdr(0)
                          col1si = rdr(1)
                          col2si = rdr(2)
                          col3si = rdr(3)
                      End While
                      TextBox10.Text = DropDownList1.Text
                      TextBox11.Text = datetimesi
                      TextBox12.Text = col1si
                      TextBox13.Text = col2si
                      TextBox14.Text = col3si
                  End Using
                  cmd.Dispose()
                  conn.Close()
                  conn.Dispose()
              End Using
          End Using
      Catch ex As Exception
          TextBox1.Text = "ddlSelectedIndexChanged:" &amp; ex.Message
      End Try
  End Sub
  </code></pre>