Hi All,

I have two master pages, one nested in another. In outer master page, there is a dropdown list and in the inner master page there is a drop down list.

I populate the Inner master page when the user changes selection in the outer master page, using the SelectedIndexChange event.  But what I am finding is that the dropdown list in the Inner master page is always one step behind. The populating of the dropdownlist in Inner Master page is happening before the outer master page's Selection is changed. So, the populating of the Inner Master page is using the old value.

Any idea, how to remedy this issue. Thanks,

Mokles 

Could I have a look as to how you are doing it?

I am off for 4 days. I will post the code next Tuesday when I am in office.

Thanks,

Mokles 

Hi Mokles,

As your above description, you want to change the dropdownlist's selectedtem in the inner master page according by the outer master page's dropdownlist Selection is changed,right?

Below is my solution,  create a base master page class which inherits the System.Web.UI.Masterpage, and define a virtual property ddl, its type is dropdownlist, make the inner master page inherit this base class and override this property. hope it helps.

1. BaseMasterpage codebehind.

public class BaseMasterPage: MasterPage
{

// Define  a virtauls property 
    public virtual DropDownList ddl   // make the inner master page  inherit this property 
    {
        get
        {
            return null;
        }
    }
public BaseMasterPage()
{
	//
	// TODO: Add constructor logic here
	//
}
}

2. Innner master page codebehind:

 
public partial class ChildMasterPage : BaseMasterPage// Inherit from the BaseMaster page class
{
    public override DropDownList ddl// override the virtual property of the Basemasterpage class
    {
        get
        {
            return this.ddlChilde;
        }
    }
.................
}
 
3.Outer maser page codebehind:

    BaseMasterPageCurrentpage = null;
    protected void Page_Load(object sender, EventArgs e)
    {
        Currentpage =  Page.Master  as  BaseMasterPage;
    }

    protected void ddlParent_SelectedIndexChanged(object sender, EventArgs e)// the SelectedIndexChanged even of the dropdownlist on the outer master page
    {
        if (Currentpage != null)
        {
	// Change the inner dropdownlist's selectedindex
            if (this.ddlParent.SelectedItem.Value == "A")
            {
                Currentpage.ddl.SelectedIndex = 1;
            }
            else if (ddlParent.SelectedItem.Value == "B")
            {
                Currentpage.ddl.SelectedIndex = 2;
            }
            else if (ddlParent.SelectedItem.Value == "C")
            {
                Currentpage.ddl.SelectedIndex = 3;
            }
        }
    }
 

I tried to use the inherited master page as the inner master page as suggested.

In the outer master page codebehind I have:

        BaseMasterPage Currentpage = null;

        protected void Page_Load(object sender, EventArgs e)
        {        Currentpage =  (BaseMasterPage) Page.Master ;}

but it seems the outer master page should not have any page.master class, as it does not have any master page.

Another issue is  the codebehind of the inner master page can not find the drop down list control ddlAccessiblePlayer, that has been defined in the inner master page as below:

                <asp:DropDownList ID="ddlAccessiblePlayer" runat="server" OnSelectedIndexChanged="ddlAccessiblePlayer_SelectedIndexChanged" AutoPostBack="true"> </asp:DropDownList>

 In the code behind of the inner master page I have:

        public override DropDownList  ddl// override the virtual property of the Basemasterpage class
        {
            get
            {
                return this.ddlAccessiblePlayer;
            }
        }

 The error I am getting: 'DeliveryManagement.DeliveryManagementMaster' does not contain a definition for 'ddlAccessiblePlayer'   

DeliveryManagementMaster is the name of the inner master page.

Thanks for your attention.

Mokles 

Hi,

Mokles:

but it seems the outer master page should not have any page.master class, as it does not have any master page.

The page is not the master page, it is the content page. the page.master is the inner master, the page.master.master is the outer master page.

Mokles:

Another issue is  the codebehind of the inner master page can not find the drop down list control ddlAccessiblePlayer, that has been defined in the inner master page as below:

                <asp:DropDownList ID="ddlAccessiblePlayer" runat="server" OnSelectedIndexChanged="ddlAccessiblePlayer_SelectedIndexChanged" AutoPostBack="true"> </asp:DropDownList>

 In the code behind of the inner master page I have:

        public override DropDownList  ddl// override the virtual property of the Basemasterpage class
        {
            get
            {
                return this.ddlAccessiblePlayer;
            }
        }

 The error I am getting: 'DeliveryManagement.DeliveryManagementMaster' does not contain a definition for 'ddlAccessiblePlayer'   

DeliveryManagementMaster is the name of the inner master page.

You only need to override the dropdownlist that is on the inner master page?  Did you put the two dropdownlists on the master page?

In test project, I have two dropdownlist controls, one is on the outer master page, the other is on the inner master page.

Although the basemasterpage and inheritance of that, may work, I found another way.  Read article:

http://aspnet.4guysfromrolla.com/articles/013107-1.aspx

Although the article about passing information from the master page to the content page, it will work for outer master page and inner master page. The outer master page is loosely coupled with the inner  master page, which is good design.

Thanks all for the support.

Mokles