470,648 Members | 1,337 Online
Bytes | Developer Community
New Post

Home Posts Topics Members FAQ

Post your question to a community of 470,648 developers. It's quick & easy.

Error: Failed to load viewstate. The control tree into

Hi to all,

I have a webform.aspx and inside i have a dropdown list with autopostback
and a place holder...

Depending of the selected index that the user selects in the dropdownlist i
load a usercontrol into the place holder...

i dont know why im getting this error:

Failed to load viewstate. The control tree into which viewstate is being
loaded must match the control tree that was used to save viewstate during the
previous request. For example, when adding controls dynamically, the controls
added during a post-back must match the type and position of the controls
added during the initial request.

and this is that i have:

if(!Page.IsPostBack)
{
//fill the dropdownlist with the options
}
else
{
switch(this.OpcionInicialDDL1.SelectedValue)
{
case "0": //Option 0 is "choose option" dont fill the placeholder
break;
case "1": //Option 1 is "Phone", add to place holder the phone
usercontrol

PhoneControl=(UserControls.Phone)LoadControl("User Controls/Phone.ascx");
//load the control phone
this.OpcionPH.Controls.Add(PhoneControl);//add into the placeholder
controls the control phone
break;
case "2": //Option 2 is "Internet", add to place holder the Internet
usercontrol

InternetControl=(UserControls.Internet)LoadControl ("UserControls/Internet.ascx"); //load the control internet
this.OpcionPH.Controls.Add(InternetControl); //add into the placeholder
control the internet
break;
case "3": //Option 3 is "Phone + Internet", add to place holderthe Phone
and Internet usercontrol
PhoneControl=(UserControls.Phone)LoadControl("User Controls/Phone.ascx");
//load the control phone

InternetControl=(UserControls.Internet)LoadControl ("UserControls/Internet.ascx"); //load control internet
this.OpcionPH.Controls.Add(PhoneControl); //add into the place holder the
phone control
this.OpcionPH.Controls.Add(InternetControl); //add into the place holder
the internet control
break;
}
}

Any help would be appreciated.

--
Thanks
Regards.
Josema
Nov 17 '05 #1
0 2236

This discussion thread is closed

Replies have been disabled for this discussion.

Similar topics

3 posts views Thread by Eamonn O'Connell | last post: by
2 posts views Thread by Mike Hnatt | last post: by
1 post views Thread by Michael | last post: by
1 post views Thread by et | last post: by
1 post views Thread by Tim | last post: by
reply views Thread by Amrit | last post: by
2 posts views Thread by Chris | last post: by
reply views Thread by warner | last post: by
By using this site, you agree to our Privacy Policy and Terms of Use.