I have a project I've been working on for quite a while, and I've run into a referencing problem. Currently the solution outline looks like this:
Solution
Agent_Toolbox namespace
MainWindow
CallTemplate (UserControl)
CallTemplate class
CustomTextBoxes namespace
NumberTextBox (CustomControl)
NumberTextBox class
My problem is that CallTemplate uses one of the NumberTextBox custom controls. I need to reference the CallTemplate class from within the NumberTextBox class in a typeof statement. ie:
ParentControls parentControl = new ParentControls();
Visual parent = parentControl.GetParentControls(this, 3);
if (parent == typeof(CallTemplate))
{
//Do something
}
But no matter what I try I can't get VS to recognize CallTemplate in this instance as a class. I tried adding a reference to NumberTextBox, but it gives me an error of circular redundancy. I also tried seperating CallTemplate into a separate namespace, but then it can't find NumberTextBox without a circular redundancy. Ont thing I thought of doing was placing all the User/Custom controls into a separate project within the solution, but then the xaml couldn't find CustomTextBoxes in order to add the box into the CallTemplate. I'm prertty much frustrated and at a loss, and convinced it's something simple I'm missing.
Any ideas please?
Edit:
I added a UserControl to the CustomTextBoxes project. VS studio placed it within the same namespace, and generated
public partial class CallTemplate: UserContol
{
public CallTemplate()
{
InitializaComponent();
}
}
If I try to rename the namespace it renames the whole namespace, rather than just this file's. So I created a new namespace underneath, and pasted the CallTemplate code within it. VS balked at the InitializeComponent() method, saying it doesn't exist with in the current context. Basically I need to know how to migrate one part of a namespace's code to a different namespace.
Two projects cannot reference each other. If they did, how would visual studio know which to build first? When that happens, it usually means it's a design flaw. Combine your projects, or have the references only go one way.
Related
I have a custom form from Solution1
public partial class MasterForm : Form
{
public MasterForm()
{
InitializeComponent();
}
}
however, upon creating a new solution (Solution2), trying to inherit the MasterForm (from Solution1).
I don't see the MasterForm in the Inheritance Picker (Unless I browse for the .dll).
Update:
From what I understand is, the two solutions are referenced, like if Soln 1 is using the class from Soln 2, Soln 2 has to be added as a reference to Soln 1.
Once it is done, the namespace of the class for Soln 2 has to be used (usually the Visual Studio IDE will give the suggestion for the reference issue if you are using it).
But this should solve the issue.
I have reproduced your problem. It seems that I can do nothing for Inheritance Picker.
However, I suggest that you can write a small code to inherit the form.
Code:
public partial class Form1 :Inheritance.MasterForm
You can change form to Inheritance.MasterForm to do it.
Finally, you can look at the form from the dll.
Unfortunately, due to issues that are frustratingly out of my control, I'm forced to use components with namespaces which I cannot change. Because of the way they have structured them, it's causing collisions in the generated code-behind.
Again, unfortunately, I do not have access to the code which defines these namespaces so they cannot be changed. Down-voting this does not help anyone, especially without a reason/explanation. Also, I've also tried demonstrating the issue to the owners explaining why this is a very bad design, but I've been told for other reasons, changing them is not an option, so I'm forced to find a work-around.
Here's a simplified example to illustrate the issue. Consider a solution with two projects, a 'Core' library, and the consuming application:
Items in 'Core' Library
ModelA (Namespace: SomeFeature.Core.Models)
ModelB (Namespace: SomeFeature.Core.Models)
**Items in 'ConsumingApp' (References 'Core') **
MainWindow (Namespace: ConsumingApp.SomeFeature)
TestControl (Namespace: SomeFeature.Controls)
The cause of the collision can be explained in three steps:
SomeFeature is both the root of one namespace, and a child of another
TestControl is defined as being in the rooted version of the namespace (same as the library), not the one MainWindow is in.
Code-generation ends up placing the generated variables for those XAML elements in the namespace scope of MainWindow, not that matching what's actually in the XAML.
Now if these were manually-defined variables in non-generated code-behind, dealing with this is easy. By simply adding the prefix global:: it 'roots' the namespace you're typing, thus removing all ambiguity.
namespace ConsumingApp.SomeFeature{
public partial class MainWindow{
// Note the 'global::' prefix
global::SomeFeature.Controls.TestControl MainTestControl { get; set; }
}
}
The above will ensure that it always resolves relative to the global SomeFeature namespace and never the nested ConsumerApp.SomeFeature namespace. Pretty straight forward.
However, the auto-generated code-behind from the XAML parser doesn't include that global:: prefix, so in the generated code, you actually get this:
namespace ConsumingApp.SomeFeature{
public partial class MainWindow{
// Note: without the 'global::' prefix, this resolves to
// 'ConsumingApp.SomeFeature.Controls.TestControl'
// which doesn't actually exist, causing the mentioned issue.
SomeFeature.Controls.TestControl MainTestControl { get; set; }
}
}
Which results in this error:
Error CS0234 The type or namespace name 'Controls' does not exist in the namespace 'ConsumingApp.SomeFeature' (are you missing an assembly reference?)
As noted in the code comments, this is because it's not looking for this class path...
SomeFeature.Controls.TestControl
but rather this one:
ConsumingApp.SomeFeature.Controls.TestControl
which doesn't exist, ergo the error.
The fix would be to somehow get the auto-generated code to explicitly output the global:: but I don't know how to do that, or even if it can be done.
Things I've tried:
Arguing for them to change their namespaces! (I lost!)
Explicitly referencing the assembly in the XAML import:
Defining aliases in the non-generated code-behind
Searching for aliases in the XAML world (not found)
Avoiding naming the element, and instead manually searching for the control via other properties. (Horrible, but this does work!)
So is there anything that can be done here to get the code-generator to include the 'global::' prefix, or is there another way to do this?
My problem is as follows:
I have a namespace, let's say "Foo". There are already two classes in it, let's say "MyClass" and "SomeOtherClass". They are both in separate files.
I need to add a third class to this namespace, let's say "Data", in a third file.
To begin with I implemented the logic of "SomeOtherClass" without a problem.
But then the project evolved a bit and, for the sake of clarity, the logic within "SomeOtherClass" that was using "Data" needed to be moved into "MyClass".
But now whenever I try to compile I get a compiler error reporting that "The type or namespace name 'Data' could not be found".
What's strange is that if I try to type "Data" in the editor then intellisense prompts me with the valid options for that class, and it is the same if I start with "Foo.Data", the name is also display with the light blue color.
If I delete "Data" and add the class in the same file as "MyClass" everything is fine. If I re-add "Data" in its own file (without deleting the one in MyClass' file) then I have an ambiguity between "Foo.Data" and "Foo.Data" (and this is logical).
I've also tried to delete and recreate "Data" from scratch, but it didn't solve anything.
I've searched on the internet for a solution, but I could only find answers relating to project references or Target Framework being bad, but this does not apply in my case, since they are all in the same project and I can access "Data" in others projects lying around.
NB: I don't know if it's important, but "MyClass" and "SomeOtherClass" inherit from the same parent class.
1. MyClass.cs
namespace Foo
{
public class MyClass
{
private Data data; //Error at compile time - Type or namespace name 'Data' could not be found
}
}
2. Data.cs
namespace Foo
{
public class Data
{
//Some logic to handle the data
}
}
3. SomeOtherClass.cs
namespace Foo
{
public class SomeOtherClass
{
private Data data; //Actually works well
}
}
Ok, following #Grx70 advice, I've tried to rename many things.
Data, to Data2, with no effect. MyClass to MyClass2, with some effects.
By going throught the output given with the last change, I've found out that another project use the file MyClass.cs, and have a copy for all others files that are used in MyClass.cs.
By adding an Include in the csproj of this project for Data.cs, and copy/paste Data.cs file into its folder, it solved the problem.
When I add a generic type to a form in C# I get errors like
InitializeComponent does not exist in the current context
and the same for all of my components.
Here is the code:
public partial class Form1<T> : Form
{
public Form1()
{
InitializeComponent();
}
}
First and foremost, Form1 is a partial class, it exists in more than one file.
Since you changed the Form1.cs file to have a generic Form1<T>, you also need to change the corresponding Form1.Designer.cs file to have a generic class.
Otherwise the C# compiler looks upon the two files as containing two distinct classes, one Form1<T> and one Form1. While they technically have the same name, they're distinct. You can declare a generic and a non-generic type with the same name at the same time.
So change both files.
Now, having said that, you cannot have generic forms. When you succeed in getting the compiler to compile the code (with the above described change) you will find that the form designer in Visual Studio is no longer happy with you and is unable to visually design the form.
As mentioned in the comments to this answer, if you can live without the form designer then this won't be a showstopper.
However, if you cannot live without the visual form designer then this cannot be fixed, other than to remove the generic parameters to Form1 that you added in the first place.
So you should try to find a different way to do what you want.
InitializeComponent() is a method that Visual studio generates automatically for the forms created using visual designer. This method is located in your_form_name.Designer.cs class that is "visual" part of your form where controls placed on form defined.
Probably you've just copy-pasted it from another form created in such a way. If your custom class doesn't has "visual" part like Form1.Designer.cs class in your solution - then just delete this method call from constructor. Otherwise make sure your "visual" class part has this method.
I am very new to c# and this is probably a very n00b error.
For this project I have been handed existing code to work with. The structure of the code is that it has a main solution with simulation as a supporting namespace.
I copied one of the classes (Adt_12) from simulation namespace that I want to modify and renamed it (Pb_cs2). The way I copied is, was to click on save as.. and then changed the file name to the new name I want. And then changed the public class name (and the constructors) to this new file name. I have rebuild 'simulation' and it rebuilts fine.
But when I try to call Pb_cs2, it is throwing the above 'the type or namespace named Pb_cs2 could not be found'.
The way I am using it in the executable class in main; is
public static Pb_cs2 pb; (which was originally using Adt_12).
But it can still find Adt_12 in the solution and namespace. Just no Pb_cs2. I have rebuilt and built the solution.
The common error of .NET framework is not relevant.
Any ideas why this is happening and how I can fix this? I really dont want to modify the original file.
Take a look here. Visual Studio saying name doesn't exist in current context
You need to make sure:
Your class name and namespace are not the same, like Pb_cs2.Pb_cs2 as this will confuse the compiler
You can fully qualify the path to the class i.e. MyNamespace.MyNestedNameSpace.MyClass
You can use a shortcut i.e. using MyClass = MyNamespace.MyNestedNamespace.Class1
Ensure that your projects are targeting the same framework i.e. .NET 4.0 / .NET 4.0 Client Profile.
You might have a collision where your class has the same name as another class, in which case, use option 2, or rename your class to something else.
If your class name does not appear in intellisense, then it does not know where to look for it. You can right click the class and click "Resolve" which will give you some options on how to qualify your class.
...that is all I can think of right now!...Good Luck!
Edit:
Look up C# stylistic conventions... those class names are ugly!!!
Add a reference to the namespace which contains the class you are calling. So you might have something like
namespace SomeNamespace
{
public class Pb_cs2
{
...
}
}
so you need to add using SomeNamespace; to the declarations at the top of the file that is attempting to call your class. Or call the class using the fully qualified name
SomeNamespace.Pb_cs2 pbcs2 = new SomeNamespace.Pb_cs2();
You can also create a alias to the namespace when you reference it like
using NS = SomeNamespace;
then the above explicit reference can be called like
NS.Pb_cs2 pbcs2 = new NS.Pb_cs2();
I hope this helps.
Do it this way to be sure the calss is known by your solution.
Project->addclass
select class if it isn't selected by now.
Name it and then add the new class.
it should appear in your solution explorer.
Now copy paste the code. rename the class the namespace should be fine.
and you should be okay with that.