Accessing User Controls in Code Behind

[Flappie]

Hello,

I'm using a number of User Controls, which are all defined in web.config using the tagname/prefix and source. When I add them to a page, and refer to them using the ID in the code behind, to set properties and such things, I get a JustCode error and also when I add an event listener in the code behind.

For example,

LatestProductList.Selected += new Controls_Products_ProductsList.SelectedEventHandler(LatestProductList_Selected);

gives the two errors:
"The type 'Controls_Products_ProductsList' is defined in an assembly that is not referenced." (the first bit is underlined)
"Unknown entity 'Controls_Products_ProductsList'. Maybe a reference to [location of the current project] is missing." (the bit just after new is underlined)

Everything works fine and as expected, I just have 156 JustCode errors in 8 files which are all related to that, which makes it a little annoying to search for ones that might actually break something.

Now my question is, am I doing the usercontrol thing all wrong, or is this a bug in JustCode? If the first, how should it be done?

Thanks

[Tsviatko Yovtchev]

Hi MIke,

That's definitely not a known bug.  You cannot be doing anything wrong, too since your project compiles.

Could you send me your web.config? A small sample project with one of y our user controls would be even nicer if possible.

Best wishes,

Tsviatko

the Telerik team

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[Flappie]

Hello,

While creating a small sample project, I noticed that the problem didn't appear to be there when I created a website directly, but my website is part of a larger solution. I don't appear to be able to upload a zip, so here's what I did:

Create a new blank solution.
Add a new solution folder to that solution.
Add a new website to that folder.
Create a "Control" folder in that website.
Add a "TestControl.ascx" file to that folder
Add a radcombobox to that file with any random datasource (in this case a Dictionary in the app_code folder)
set the combobox to auto postback

Add this to the .cs file:

public delegate void SelectedEventHandler(int selected);
public event SelectedEventHandler Selected;

protected void Page_Load(object sender, EventArgs e)
{
}
protected void RadComboBox1_SelectedIndexChanged(object o, RadComboBoxSelectedIndexChangedEventArgs e)
{
    if (this.Selected != null)
    {
        this.Selected(Int32.Parse(RadComboBox1.SelectedValue));
    }
}

Add the control to the web.config like so:

<add tagPrefix="test" tagName="TestList" src="~/Controls/TestControl.ascx"/>

Add that control to the Default.aspx:

<form id="form1" runat="server">
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
</telerik:RadScriptManager>
<div>
    <test:TestList ID="TestList1" runat="server" />
    <asp:Label ID="ResultLabel" runat="server"></asp:Label>
</div>
</form>

And put this in the Default.aspx.cs:

protected void Page_Load(object sender, EventArgs e)
{
    TestList1.Selected += new TestControl.SelectedEventHandler(TestList1_Selected);
}

void TestList1_Selected(int selected)
{
    ResultLabel.Text = selected.ToString();
}

This line: TestList1.Selected += new TestControl.SelectedEventHandler(TestList1_Selected);
Gives the errors:
C#: The type 'TestControl' is defined in an assembly that is not referenced.    Default.aspx.cs    C:\...\Test\TestWebSite\    17    3
C#: The type 'TestControl.SelectedEventHandler' is defined in an assembly that is not referenced.    Default.aspx.cs    C:\...\Test\TestWebSite\    17    13
C#: Unknown entity 'TestControl'. Maybe a reference to C:\Users\Michel\Projects\Test\TestWebSite\ is missing    Default.aspx.cs    C:\...\Test\TestWebSite\    17    29

However, when I run the project, and change the combobox, the resultlabel is updated, so it does work. If you need the sample project, let me know how to send it.

Thanks

[Flappie]

Hello again,

When I opened the project just now, JustCode told me there was an update, which I installed, and then the problem went away.

[Tsviatko Yovtchev]

Well, there are some changes in the latest version that might have fixed that. So, if thee problem does not reoccur we might consider it fixed.

I really appreciate the effort on your side to help us reproduce that issue, though. So I added some well deserved Telerik Points to your account. 

Kind regards,

Tsviatko

P.S. Don't hesitate to let us know if you encounter that issue again.

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Watch a video on how to optimize your support resource searches and check out more tips on the blogs.