I have a problem about WebThumbnailViewer and WebImageViewer

Hi, everyBody:

I am developing web application in C#.net 2005.I am using WebThumbnailViewer and WebImageViewer for displaying image.

but I can't display Images correctly.

Fisrtly,there is error:

Microsoft JScript runtime error: 'WebImageViewer1' is undefined.

then, I add following code:

WebThumbnailViewer1.ViewerID = WebImageViewer1.ClientID;

but there has another error:

ct100_ContentPlaceHolder1_WebImageViewer1_err Object not found!
I am using V15.

Thanks!

I'm not sure what is causing the "'WebImageViewer1' is undefined." error in your project. I tried to modify it and change it but it did not work. I followed the tutorial in the "Updating Web Controls Manually" help topic that creates a similar project and it worked fine. I am attaching the website I created.

Thank you !

Just like you ,I can create a project and it also worked fine.

But，I want to use "WebThumbnailViewer \WebImageViewer"  in ContentPlaceHolder(a control bar).Just like the following code:

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Default4.aspx.cs" Inherits="Default4" Title="Untitled Page" %>

<%@ Register Assembly="Leadtools.Web" Namespace="Leadtools.Web.Controls" TagPrefix="ltwf" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <ltwf:WebThumbnailViewer ID="WebThumbnailViewer1" runat="server" BorderStyle="Solid"
        BorderWidth="1px" Height="320px" Width="220px" ViewerID="WebImageViewer1"/>
    <ltwf:WebImageViewer ID="WebImageViewer1" runat="server" BorderStyle="Solid" BorderWidth="1px"
        Height="320px" Width="320px" />
</asp:Content>

This aspx have using the "MasterPage.master", then it had  a error. Can you help me?

If don't using "MasterPage.master",the project can work fine.

The reason that the WebImageViewer isn't being found is because the ContentPlaceHolder names the controls so you can't set the WebThumbnailViewer.ViewerID at design time.  This must be done at run time.  
I rechecked your application and modify one line of code in it and both problems were gone.
I am attaching your modify project. I am using the latest LEADTOOLS v15 patches released on January 15 2010. If you have an older patch files, reply to ticket# 2010081110000721 that you sent to support@leadtools.com and include your LEADTOOLS v15 toolkit serial number in your email. (Do NOT post it here)

oh, I am using LEADTOOLS Evaluation v15[1].0.1.3.

I have tried the project which you modified, but it also have the error:

ct100_ContentPlaceHolder1_WebImageViewer1_err Object not found!

Are you sure the problems was gone?

Or because of the Version of Leadtools?

I'm using the latest LEADTOOLS v15 patches with Leadtools.Web.dll build 15.0.1.8, which is a newer DLL.
Please note that LEADTOOLS v15 is no longer available as an evaluation version. If you want to continue evaluating our toolkit, please download the latest v17 SDK from our site and test it.