title: DropDownList: SelectedIndexChanged do not fire
body: <p>I fill a ASP Dropdownlist in the pageload</p>
  
  <pre><code>protected void Page_Load(object sender, EventArgs e)
          {
              if (!IsPostBack)
              {           
                  for (int i = 0; i &lt; _maxStationsAnz; i++)
                  {
                      String stations = arrayList[1];
  
                      _allData = stations.Split(Convert.ToChar("/"));
                      _data = _allData[i].Split(Convert.ToChar(";"));
  
                      ddWeatherstations.Items.Add(_data[0]);
                  }
          }
  </code></pre>
  
  <p>When a new station is selected, it should update informations. I use the <code>OnSelectedIndexChanged</code> attribute on my aspx site.</p>
  
  <p>My code behind:</p>
  
  <pre><code>protected void ddWeatherstations_SelectedIndexChanged(object sender, EventArgs e)
      {
          for (int i = 0; i &lt; _maxStationsAnz; i++)
          {
              if (ddWeatherstations.SelectedIndex == i)
              {
                    lselected.Text = "Index changed!";
                    //unimportant code
                    //....
              }
          }
      }
  </code></pre>
  
  <p>When I set a breakpoint and run the program and change the value of the dropdownlist, nothing happens.</p>