User control sharing between several projects

Hi, I have a user control which I like to use in several projects (winforms)
in the same solution. Inside lets say Winapp1 , When adding a reference to
this control, I can dynamically or statically create it and when running the
application it is correctly drawn on the form. But when I take out the
reference to this control in Winapp1, reference it in a utility project,
then reference the utility project in Winapp1 or Winapp2, instantiate the
utility.mControl, it doesn't get drawn on the form and I get no errors.
I did a quick check, I added 2 instances of the user control referenced in
the utility project to my form, using
messagebox.show(myform.controls.count), it displays 2 which means that
controls are added but not being able to be drawn. Of course I double checked
properties such as visible = true..............
Thanks in advance for any help

Re: User control sharing between several projects

On Tue, 22 Apr 2008 05:01:00 -0700, SalamElias
wrote:

>Hi, I have a user control which I like to use in several projects (winforms)
>in the same solution. Inside lets say Winapp1 , When adding a reference to
>this control, I can dynamically or statically create it and when running the
>application it is correctly drawn on the form. But when I take out the
>reference to this control in Winapp1, reference it in a utility project,
>then reference the utility project in Winapp1 or Winapp2, instantiate the
>utility.mControl, it doesn't get drawn on the form and I get no errors.
>I did a quick check, I added 2 instances of the user control referenced in
>the utility project to my form, using
>messagebox.show(myform.controls.count), it displays 2 which means that
>controls are added but not being able to be drawn. Of course I double checked
>properties such as visible = true..............
>Thanks in advance for any help

When you instantiate the control, are you adding it to its parent's
Control collection?

RE: User control sharing between several projects

Hi Salam,

Based on my understanding, you have Control Library project which contains
a UserControl and a Class Library project and some Windows Application
projects in a solution.

If you add add a reference to the Control Library project in the Class
Library project and then add a reference to the Class Library project in
the Windows Application projects and then add the UserControl on the form,
the UserControl doesn't appear on the form when the application is run.

If I'm off base, please feel free to let me know.

I performed a test based on your description, but didn't reproduce the
problem on my side. The steps of my test are as follows:

1. Create a solution and add a Control Library project and a Class Library
project and a Windows Application project to the solution. Add a
UserControl in the Control Library project.

2. Derive the Class1 in the Class Library project from the UserControl in
the Control Library project:
namespace ClassLibrary1
{
public class Class1:WindowsControlLibrary1.UserControl1
{
}
}

3. Build the solution.

4. Drag the UserControl from Toolbox and drop it onto the form in the
Windows Application project. A reference to the Control Library project is
added to the Windows Application project automatically. Build and run the
application and the UserControl appears on the form.

5. Remove the reference to the Control Library project from the Windows
Application project and add a reference to the Class Library project in the
Windows Application project.

6. Add the following lines of code in the Form's Load event handler to add
the UserControl on the form dynamically:
private void Form1_Load(object sender, EventArgs e)
{
ClassLibrary1.Class1 mycontrol = new ClassLibrary1.Class1();
this.Controls.Add(mycontrol);
}

7. Build the solution. An compilation error occurs:
The 'WindowsControlLibrary1.UserControl1' is defined in an assembly that is
not referenced. You must add a reference to the assembly "...".

Is there any difference between your solution and mine?

Sincerely,
Linda Liu
Microsoft Online Community Support

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
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RE: User control sharing between several projects

yes, you are almost correct, one difference is my user control is compiled as
a dll and referenced in my utility class library as follows.

Public Class Gauge
Inherits AGauge.AGauge

Then in my windows app I do
Dim Gauge1 Gauge = New Gauge()


but I don't get a compiltaion error and even as I said my message box
indicates that there is a new control added to the form
"Linda Liu[MSFT]" wrote:

> Hi Salam,
>
> Based on my understanding, you have Control Library project which contains
> a UserControl and a Class Library project and some Windows Application
> projects in a solution.
>
> If you add add a reference to the Control Library project in the Class
> Library project and then add a reference to the Class Library project in
> the Windows Application projects and then add the UserControl on the form,
> the UserControl doesn't appear on the form when the application is run.
>
> If I'm off base, please feel free to let me know.
>
> I performed a test based on your description, but didn't reproduce the
> problem on my side. The steps of my test are as follows:
>
> 1. Create a solution and add a Control Library project and a Class Library
> project and a Windows Application project to the solution. Add a
> UserControl in the Control Library project.
>
> 2. Derive the Class1 in the Class Library project from the UserControl in
> the Control Library project:
> namespace ClassLibrary1
> {
> public class Class1:WindowsControlLibrary1.UserControl1
> {
> }
> }
>
> 3. Build the solution.
>
> 4. Drag the UserControl from Toolbox and drop it onto the form in the
> Windows Application project. A reference to the Control Library project is
> added to the Windows Application project automatically. Build and run the
> application and the UserControl appears on the form.
>
> 5. Remove the reference to the Control Library project from the Windows
> Application project and add a reference to the Class Library project in the
> Windows Application project.
>
> 6. Add the following lines of code in the Form's Load event handler to add
> the UserControl on the form dynamically:
> private void Form1_Load(object sender, EventArgs e)
> {
> ClassLibrary1.Class1 mycontrol = new ClassLibrary1.Class1();
> this.Controls.Add(mycontrol);
> }
>
> 7. Build the solution. An compilation error occurs:
> The 'WindowsControlLibrary1.UserControl1' is defined in an assembly that is
> not referenced. You must add a reference to the assembly "...".
>
> Is there any difference between your solution and mine?
>
> Sincerely,
> Linda Liu
> Microsoft Online Community Support
>
> Delighting our customers is our #1 priority. We welcome your comments and
> suggestions about how we can improve the support we provide to you. Please
> feel free to let my manager know what you think of the level of service
> provided. You can send feedback directly to my manager at:
> msdnmg@microsoft.com.
>
> ==================================================
> Get notification to my posts through email? Please refer to
> http://msdn.microsoft.com/subscriptions/managednewsgroups/de fault.aspx#notif
> ications.
>
> Note: The MSDN Managed Newsgroup support offering is for non-urgent issues
> where an initial response from the community or a Microsoft Support
> Engineer within 1 business day is acceptable. Please note that each follow
> up response may take approximately 2 business days as the support
> professional working with you may need further investigation to reach the
> most efficient resolution. The offering is not appropriate for situations
> that require urgent, real-time or phone-based interactions or complex
> project analysis and dump analysis issues. Issues of this nature are best
> handled working with a dedicated Microsoft Support Engineer by contacting
> Microsoft Customer Support Services (CSS) at
> http://msdn.microsoft.com/subscriptions/support/default.aspx .
> ==================================================
> This posting is provided "AS IS" with no warranties, and confers no rights.
>
>
>

RE: User control sharing between several projects

Hi Salam,

Thank you for your reply!

Since I couldn't reproduce the problem on my side, it would be better if
you could reproduce the problem in a simple solution and send it to me. To
get my actual email address, remove 'online' from my displayed email
address.

I look forward to your reply!

Sincerely,
Linda Liu
Microsoft Online Community Support

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
msdnmg@microsoft.com.

This posting is provided "AS IS" with no warranties, and confers no rights.