When I use autoproperty for example
public string Prop {get;set;}
compiler generates two functions: get_Prop() and set_Prop(string val). I would like to set breakpoint on one from this function. When I set breakpoint by function this function name debuger never enter in this functions. Intellisense doesn't work in my dialog (Ctrl+B)
My questions:
1) Where compiler save source code with replaced property to function? If it do this.
2) Why Intelisense not working?
3) How to set breakpoint on this functons?
I use VS2013 Ultimate.
1) the compiler don't save source code, it compiles. The implicit backing fields are only present in the IL code.
2) It's a feature, not a bug, I agree it could be great.
3) You have to create a backing field manually in order to put a breakpoint on it.
private string _prop;
public string Prop
{
get { return _prop; }
set { _prop= value; }
}
There is a great solution described here:
Debugging automatic properties
Basically, you can set a breakpoint with Breapooint->Create New and put it on
ClassName.set_PropertyName
or
ClassName.get_PropertyName.
It is also available in Visual Studio 2015, or for earlier versions you can use VS plugins such as Oz Code to do this automatically (break on setter)
Related
I am programming something with the help of an API. This API has a class Component2 with a not very useful override of ToString. Because of that, debugging isn't very comfortable - see screenshot:
The class has a getter property Name which gives me the information I need.
How can I make Visual Studio to output the Name value instead of ToString()?
I am using Visual Studio 2015.
To clarify:
This is the current situation:
And this is what I want it to be:
Enabling native debugging or replacing my one line of code with
dynamic swxRootComp = _activeDoc.ConfigurationManager.ActiveConfiguration.GetRootComponent3(false);
var nameValue = swxRootComp.Name;
allows me to see more than before, but the Name is still nowhere to be found:
use component2.GetType().Name for the component object
Press Alt+Enter (in Visual Studio), go to the "Debugging" Tab and Enable "Native Code Debugging".
For that purpose, you can use the DebuggerDisplayAttribute.
For example
[DebuggerDisplay("{value}", Name = "{key}")]
public class KeyValuePairs
{
private object key;
private object value;
public KeyValuePairs(object key, object value)
{
this.value = value;
this.key = key;
}
}
Is there any way to set breakpoint on setter/getter in auto-implemented property?
int Counter { get; set; }
Other than changing it to standard property (I'm doing it in this way, but to do that I have to change and recompile whole project)
Using Visual Studio 2008, 2010, 2012, 2013:
Go to the Breakpoint window
New -> Break at Function…
For the get, type: ClassName.get_Counter()
For the set, type: ClassName.set_Counter(int)
You'll get a "No Source Available" when the breakpoint is hit, but you'll get the calling location in the call stack.
I found this solution here on MSDN
On Visual Studio 2017:
Hover over "set" word -> right click -> Breakpoint -> Insert Breakpoint
Before:
After:
This question is very old but it is worth noting that it just works in VS 2015.
https://devblogs.microsoft.com/devops/set-breakpoints-on-auto-implemented-properties-with-visual-studio-2015/
class X {
public string name {
set;
get; // setting a breakpoint here will break in VS 2015!
}
}
If I was you, I'd temporarily make the property a standard one backed by an internal field...set your breakpoints, and then you can change it back after.
Set Breakpoints where you are setting property or getting property, No other way.
you can do this by Find All References options
And Since it is only storing values and do not have any code in setter part so what do you debug?
I have defined two properties, "Name" and "ID", for an object which I use for the DisplayMember and ValueMember of a ComboBox with a BindingList datasource.
I recently installed ReSharper to evaluate it. ReSharper is giving me warnings on the object that the two properties are unused.
Sample code:
BindingList<ClassSample> SampleList = new BindingList<ClassSample>();
// populate SampleList
cmbSampleSelector.DisplayMember = "Name";
cmdSampleSelector.ValueMember = "ID";
cmbSampleSelector.DataSource = SampleList;
private class ClassSample
{
private string _name;
private string _id;
public string Name // ReSharper believes this property is unused
{
get { return _name; }
}
public string ID // ReSharper believes this property is unused
{
get {return _id; }
}
public ClassSample(string Name, string ID)
{
_name = Name;
_id = ID;
}
}
Am I doing something wrong or is ReSharper clueless about this particular usage?
The way that JetBrains suggests that you solve these issues is with their attributes (available from ReSharper -> Options -> Code Annotations). Add the attributes to your project/solution and then mark these properties with the UsedImplicitly attribute. ReSharper will now assume that the properties are used via Reflection or late bound or whatever.
Just to add to David's answer, in Resharper 8.x and later, add the Resharper.ExternalAnnotations plugin to Resharper in Visual Studio (Resharper -> Extension Manager).
When Resharper next complains about an unused property, you can then click on the left hand purple pyramid and select Used Implicitly, which will decorate the field / property with an UsedImplicitlyAttribute.
You can then either directly add a reference to JetBrains.Annotations.dll in your project, or you can choose to let Resharper add a small Annotations.cs file to your project containing the Attribute definition (and others like NotNullAttribute). The Annotations.cs file is located under the Properties icon in the solution folder.
As an aside, it would have been nice to be to be able to add a Description to the attribute as well, e.g. [UsedImplicitly(Description="Used by NUnit Theory / Reflected by Xyz, etc")], so in the interim we'll need to comment.
You are setting the properties via reflection (this is what the code above amounts to). ReSharper can only analyze static behavior (with some very limited exceptions), so it can't know that these properties are actually being used.
You can simply suppress the warnings though. Just click on the property name and hit Alt+Enter, then choose the option to suppress the warning. This will add a // ReSharper disable comment around the variable name.
When things are used via reflection (which I imagine is what the framework is doing in your case), ReSharper can't tell (at least in it's current form).
I did use the ReSharper mechanism for commenting out that check for a specific instance which I also needed, using this process with ReSharper:
This worked great for what I needed in this where I am using an implicit mechanism for setting the value but do not want to turn it off project wide.
To install ReSharper annotations:
PM> Install-Package JetBrains.Annotations
Then you can add the attributes by typing [UsedImplicitly] or by using the context menu (screenshot).
Code sample:
using JetBrains.Annotations;
class ClassSample
{
private string _name;
private string _id;
[UsedImplicitly]
public string Name // ReSharper believes this property is unused
{
get { return _name; }
}
[UsedImplicitly]
public string ID // ReSharper believes this property is unused
{
get { return _id; }
}
public ClassSample(string Name, string ID)
{
_name = Name;
_id = ID;
}
}
Using the standard VS IDE, is there a fast way to create class properties that are linked to the local variables?
The class diagram seems to provide something, but it basically just created a property stub. Is there something better / easier out there ?
In VS.NET 2008 you can use refactoring, Encapsulate field (ctrl + r, e).
Here is info about how Refactoring In Visual Studio 2008
If you're talking about just making quick properties, then Auto-Generated properties are 'the bomb'. There's no need for a background local variable unless you plan to do something special in the get or set.
public string SampleProperty { get; set; }
or
public string SampleProperty { get; private set; }
Where you can optionally specify private / protected to limit the property to a setter or getter only. Then, you don't need a local variable and you just use the Property in place of the local variable. The compiler will generate the actual background variable for you.
I think you might be confusing an Auto Generated property with a property stub.
When building classes in Visual Studio (VS), you can generate property setters and getters quickly by defining a field variable, and then right-clicking on the field and selecting Refactor → Encapsulate Field from the popup menu. VS will display a dialog that lets you approve/change the property name, and optionally, preview changes. When you're satisfied, simply click OK. Voilà! VS generates the property!
By "generate", I mean auto-generation of the code necessary for a particular selected (set of) variable(s).
But any more explicit explication or comment on good practice is welcome.
Rather than using Ctrl + K, X you can also just type prop and then hit Tab twice.
Visual Studio also has a feature that will generate a Property from a private variable.
If you right-click on a variable, in the context menu that pops up, click on the "Refactor" item, and then choose Encapsulate Field.... This will create a getter/setter property for a variable.
I'm not too big a fan of this technique as it is a little bit awkward to use if you have to create a lot of getters/setters, and it puts the property directly below the private field, which bugs me, because I usually have all of my private fields grouped together, and this Visual Studio feature breaks my class' formatting.
I use Visual Studio 2013 Professional.
Place your cursor at the line of an instance variable.
Press combine keys Ctrl + R, Ctrl + E, or click the right mouse button. Choose context menu Refactor → Encapsulate Field..., and then press OK.
In Preview Reference Changes - Encapsulate Field dialog, press button Apply.
This is result:
You also place the cursor for choosing a property. Use menu Edit → Refactor → Encapsulate Field...
Other information:
Since C# 3.0 (November 19th 2007), we can use auto-implemented properties (this is merely syntactic sugar).
And
private int productID;
public int ProductID
{
get { return productID; }
set { productID = value; }
}
becomes
public int ProductID { get; set; }
By generate, do you mean auto-generate? If that's not what you mean:
Visual Studio 2008 has the easiest implementation for this:
public PropertyType PropertyName { get; set; }
In the background this creates an implied instance variable to which your property is stored and retrieved.
However if you want to put in more logic in your Properties, you will have to have an instance variable for it:
private PropertyType _property;
public PropertyType PropertyName
{
get
{
//logic here
return _property;
}
set
{
//logic here
_property = value;
}
}
Previous versions of Visual Studio always used this longhand method as well.
You can also use "propfull" and hit TAB twice.
The variable and property with get and set will be generated.
In visual studio 2019, select your properties like this:
Then press Ctrl+r
Then press Ctrl+e
A dialog will appear showing you the preview of the changes that are going to happen to your code. If everything looks good (which it mostly will), press OK.
If you are using Visual Studio 2005 and up, you can create a setter/getter real fast using the insert snippet command.
Right click on your code, click on Insert Snippet (Ctrl+K,X), and then choose "prop" from the list.
If you're using ReSharper, go into the ReSharper menu → Code → Generate...
(Or hit Alt + Ins inside the surrounding class), and you'll get all the options for generating getters and/or setters you can think of :-)
I created my own snippet that only adds {get; set;}. I made it just because I find prop → Tab to be clunky.
<?xml version="1.0" encoding="utf-8"?>
<CodeSnippets
xmlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnippet">
<CodeSnippet Format="1.0.0">
<Header>
<Title>get set</Title>
<Shortcut>get</Shortcut>
</Header>
<Snippet>
<Code Language="CSharp">
<![CDATA[{get; set;}]]>
</Code>
</Snippet>
</CodeSnippet>
</CodeSnippets>
With this, you type your PropType and PropName manually, then type get → Tab, and it will add the get set. It's nothing magical, but since I tend to type my access modifier first anyway, I may as well finish out the name and type.
In Visual Studio Community Edition 2015 you can select all the fields you want and then press Ctrl + . to automatically generate the properties.
You have to choose if you want to use the property instead of the field or not.
Use the propfull keyword.
It will generate a property and a variable.
Type keyword propfull in the editor, followed by two TABs. It will generate code like:
private data_type var_name;
public data_type var_name1{ get;set;}
Video demonstrating the use of snippet 'propfull' (among other things), at 4 min 11 secs.
In addition to the 'prop' snippet and auto-properties, there is a refactor option to let you select an existing field and expose it via a property (right click on the field → Refactor → Encapsulate Field...).
Also, if you don't like the 'prop' implementation, you can create your own snippets. Additionally, a third-party refactoring tool like ReSharper will give you even more features and make it easier to create more advanced snippets. I'd recommend ReSharper if you can afford it.
http://msdn.microsoft.com/en-us/library/f7d3wz0k(VS.80).aspx
Video demonstrating the use of snippet 'prop' (among other things), at 3 min 23 secs.
I don't have Visual Studio installed on my machine anymore (and I'm using Linux), but I do remember that there was an wizard hidden somewhere inside one of the menus that gave access to a class builder.
With this wizard, you could define all your classes' details, including methods and attributes. If I remember well, there was an option through which you could ask Visual Studio to create the setters and getters automatically for you.
I know it's quite vague, but check it out and you might find it.
On behalf of the Visual Studio tool, we can easily generate C# properties using an online tool called C# property generator.
First get Extension just press (Ctrl + Shift + X) and install getter setter ....
After this, just select your variable and right click. Go to Command palette...
And type getter ... It will suggest generate get and set methods. Click on this...
I personaly use CTRL+. and then select-
"Encapsulated Fildes".
That's a short for this option- (How can we generate getters and setters in Visual Studio?).
I marked the short for auto choosing refactoring (CTRL+. )
You just simply press Alt + Ins in Android Studio.
After declaring variables, you will get the getters and setters in the generated code.