C# WEB: Using Custom Control from a different project

[skcsknathan001]

I have 2 projects, and accessing a custom control [which has an ImageButton], fron another project. Inside the custom control, it calls a function [which is also inside the same project as the custom control, passing the ImageButton] It compiles and when it runs I get a NullReference error message on the function which accepts the ImageButton. Basically custom control is called .. goes into execute functions, but the ImageButton control inside the custom control is not passed to the function. I'm thinking is it some permission blocking the visibility of the ImageButton?

the control works perfect when it is referenced inside the same project. Even in my project, I'm not accessing the ImageButton from my project. I'm just calling the custom control, which has a function passing the ImageButton.

ProjectA
--login.aspx
has

<ps:header id="uc_header1" runat="server"></ps:header>

ProjectB
--header.aspx
----ImageButton

in web.config

<system.web>
        <pages>
            <controls>
                <add tagPrefix="ps"
                     namespace="PSubscribers"
                     assembly="PSubscribers" />
            </controls>
        </pages>
    </system.web>

Please somebody help me.

[Frinavale]

It calls a function [which is also inside the same project as the custom control, passing the ImageButton]

I'm not sure what you mean by this.
Could you please post the code where this function is called?

[skcsknathan001]

Here is the partial code of user control header.ascx.cs

    public partial class header : System.Web.UI.UserControl
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Page_Refresh();
        }
 
        protected void Page_Refresh()
        {
            Myutils.Prepare_ImageButton_Rollover(varimgFontSize1, "fontsize1", Myutils.CSS_ID == 1);
            Myutils.Prepare_ImageButton_Rollover(varimgFontSize2, "fontsize2", Myutils.CSS_ID == 2);
           Myutils.Prepare_ImageButton_Rollover(varimgFontSize3, "fontsize3", Myutils.CSS_ID == 3);
        }

where varimgFontSizeX is defined on the header.ascx page

<div class="changeFontSize"><asp:Image ID="varimgFontSize" runat="server" ImageUrl="~/images/en_fontsize.gif"  BorderWidth="0" 
    /><asp:ImageButton ID="varimgFontSize1" runat="server" ImageUrl="~/images/en_fontsize1_off.gif"  BorderWidth="0" OnClick="varimgFontSize1_Click" 
    /><asp:ImageButton ID="varimgFontSize2" runat="server" ImageUrl="~/images/en_fontsize2_off.gif"  BorderWidth="0" OnClick="varimgFontSize2_Click" 
    /><asp:ImageButton ID="varimgFontSize3" runat="server" ImageUrl="~/images/en_fontsize3_off.gif"  BorderWidth="0" OnClick="varimgFontSize3_Click" 
    /></div>

just to let you know, I don't have enough time. So I actually copied the user control to the project that I work on and linked like that [remember both Projects are under one Solution]. But it would be better to know this way, so you only have one usercontrol.

Oh I also found out that if I comment this function calling and put plain text -- just for testing. My page loads, except this user control is NOT displayed. Basically the header is not displayed. So I guess, even though the coding were able to see a control from the different project, it didn't recognize it as a Web User Control.

Thanks for you time. I'm not looking for answer, as I fixed my problem, not so good way. But it would be nice to know this too.

[Frinavale]

Sorry, I'm at a loss as to why your ImageButtons are null....'

Unless you didn't include the .aspx.designer.cs in the new application?

-Frinny