Hi Lee,

I'm using the same concept in UmbImport so that shouldn't be an issue. Do your retrieve the data for the controls from a database? If so make sure that you databind on postback

Cheers,

Richard

Thanks Richard.  I did try to rebind the datasource to the DropDownList control (for example, I am pulling back a list of members via the API).

But since the DropDownList had already lost the SelectedValue property, I'm not sure what to do now?

I haven't got the code with me at the moment, but I will post an example later on today.

Thanks again!

- Lee

Lee,

This any good someone else having same issue although in datatype.

Regards

Ismail

Lee - Are you trying to access the data before it has been loaded from the ViewState. The Init event is when this occurs (see http://msdn.microsoft.com/en-us/library/ms178472.aspx for the ASP.NET Page Life Cycle) so if you're using PreInit or anything before that you'll run into a snag.

Another thing, is the DropDownList enabled when the postback occurs? See this post I did - http://www.aaron-powell.com/blog/january-2009/not-getting-dropdownlist-value-when-setting-it-via-javascript.aspx on the the topic

Hi Lee,

This is the url that helped me overcome the issue I was having on the project we were working on and mentioned in the thread Ismail has linked to above:

http://geekswithblogs.net/mikethomas/archive/2007/01/15/103686.aspx

And uses the EnsureDataBound() event to rebind the data.

OK, finally it works! Woo hoo! Thanks to all for pointing me in the right direction!

@Richard, you were right, because the DropDownList wasn't being rebound to the data, but I was trying to do it as Page_Load, which didn't work.

@slace, it was your Page_Init suggestion that worked for me.  Now I am populating the DropDownList controls there, rather than in Page_Load.

.. all is good now.  Here's that code snippet I promised earlier.

protected void Page_Init(object sender, EventArgs e)
{
    // populate the drop-down boxes
    this.populateDropDowns();
}

protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        // populate the drop-down boxes
        // this.populateDropDowns(); // moved to Page_Init
    }
}

private void populateDropDowns()
{
    // populate the members list
    Member[] members = Member.GetAll;
    if ((members != null) && (members.Length > 0))
    {
        // this.ddlMembers.Items.Clear();
        this.ddlMembers.Items.Add(new ListItem("Select a member...", "-1"));

        foreach (Member member in members)
        {
            this.ddlMembers.Items.Add(new ListItem(member.Text, member.Id.ToString()));
        }
    }
}

Now on Postback, the DropDownList control has all it's ListItem options and the ViewState is correctly loading in the SelectedValue!

Thanks again for everyone's help!

- Lee

Psst - you really should use the ASP.NET Membership API to get the list of members ;)

I was trying to create a custom checkboxlist datatype with a default selected value to be used in several places in Umbraco and in particular in the member section. I visited quite a number of forums and followed each different solution I found but none worked completely for me.

I am using Umbraco v6.

My main issue was in the "if (Page.IsPostBack)" of the Page_Load event where I was supposed to set the umbracoValue when the user saves its new selected values, the checkboxlist did not have these selected items as selected ! Instead I always had the values as defined in my ascx page, ie only the default value selected. There was no problem in displaying the saved values when loading the member's page.

I changed the code and found a way to make it all work, but cannot explain why I had to do it this way when nearly every forum tells me otherwise. If someone can enlight me ... Thanks.

here is the ascx code : @ControlLanguage="C#"AutoEventWireup="true"CodeBehind="s2k_dataType.ascx.cs"Inherits="WebUmbraco.s2k_dataType" %>

<asp:CheckBoxListID="chkEnseignes"runat="server"AutoPostBack="True">
  <asp:ListItemSelected="True"Value="0">Sport 2000 Plaineasp:ListItem>
  <asp:ListItem Value="1">Sport 2000 Montagneasp:ListItem>
  <asp:ListItemValue="2">Mondovelo</asp:ListItem>
  <asp:ListItemValue="3">S2asp:ListItem>
  <asp:ListItemValue="4">Espace Montagneasp:ListItem>
  <asp:ListItemValue="5">Ski-Wayasp:ListItem>
  <asp:ListItemValue="6">Degrif' Sportasp:ListItem>
asp:CheckBoxList>

here is the ascx.cs code :
publicstring umbracoValue;

public object value
{
      get
            {
             foreach (ListItem item in chkEnseignes.Items)
                 {
                      if (item.Selected)
                     {
                          if (umbracoValue == null) umbracoValue = item.Value;
                          else umbracoValue += "," + item.Value;
           }//if
        }//foreach
               return umbracoValue;
     }//get

         set
         {
         umbracoValue = value.ToString();
     }//set
 }

 protectedvoid Page_Load(object sender, EventArgs e)
{
      if (!Page.IsPostBack)
      {
           if (umbracoValue != null)
           {
                   string[] selenseignes = umbracoValue.Split(',');
         chkEnseignes.SelectedIndex = -1;
         foreach (string sel in selenseignes)
                   {
                           ListItem item = chkEnseignes.Items.FindByValue(sel);
             if (item != null) item.Selected = true;
         }//foreach
     }//if
  }//if
}//Page_Load

is working on a reply...