How to make DebuggerDisplay work for composite types in Dictionary?
In an attempt to pleasantly display a Dictionary's content, I wrote this:
[assembly: DebuggerDisplay("{Key,nq} -> {Value,nq}", Target = typeof(KeyValuePair<,>))]
namespace test {
[DebuggerDisplay("{DebuggerDisplay,nq}")]
public class Thing {
private readonly int _num;
public string DebuggerDisplay => $"DBG: {_num}";
public Thing(int num) => _num = num;
}
public class Program {
static void Main(string args) {
var map = new Dictionary<string,Thing> {
["Foo"] = new Thing(1),
["Bar"] = new Thing(2),
};
}
}
}
And I would've expected to see in the debugger this:
Foo -> DBG: 1
Bar -> DBG: 2
But instead I see this:
Foo -> {test.Thing}
Bar -> {test.Thing}
It's worth noting that if I expand on of the KeyValuePairs, I do see that:
Name | Value
--------+-------
Key | "Foo"
Value | DBG: 1
So the DebuggerDisplay does work.
So the problem is how to display the content of a composite type in the main watch-list of the dictionary's content?
c# visual-studio-debugging debuggerdisplay
asked Nov 18 '18 at 14:20
TarTar
3,17263379
add a comment |
In an attempt to pleasantly display a Dictionary's content, I wrote this:
[assembly: DebuggerDisplay("{Key,nq} -> {Value,nq}", Target = typeof(KeyValuePair<,>))]
namespace test {
[DebuggerDisplay("{DebuggerDisplay,nq}")]
public class Thing {
private readonly int _num;
public string DebuggerDisplay => $"DBG: {_num}";
public Thing(int num) => _num = num;
}
public class Program {
static void Main(string args) {
var map = new Dictionary<string,Thing> {
["Foo"] = new Thing(1),
["Bar"] = new Thing(2),
};
}
}
}
And I would've expected to see in the debugger this:
Foo -> DBG: 1
Bar -> DBG: 2
But instead I see this:
Foo -> {test.Thing}
Bar -> {test.Thing}
It's worth noting that if I expand on of the KeyValuePairs, I do see that:
Name | Value
--------+-------
Key | "Foo"
Value | DBG: 1
So the DebuggerDisplay does work.
So the problem is how to display the content of a composite type in the main watch-list of the dictionary's content?
c# visual-studio-debugging debuggerdisplay
asked Nov 18 '18 at 14:20
TarTar
3,17263379
add a comment |
In an attempt to pleasantly display a Dictionary's content, I wrote this:
[assembly: DebuggerDisplay("{Key,nq} -> {Value,nq}", Target = typeof(KeyValuePair<,>))]
namespace test {
[DebuggerDisplay("{DebuggerDisplay,nq}")]
public class Thing {
private readonly int _num;
public string DebuggerDisplay => $"DBG: {_num}";
public Thing(int num) => _num = num;
}
public class Program {
static void Main(string args) {
var map = new Dictionary<string,Thing> {
["Foo"] = new Thing(1),
["Bar"] = new Thing(2),
};
}
}
}
And I would've expected to see in the debugger this:
Foo -> DBG: 1
Bar -> DBG: 2
But instead I see this:
Foo -> {test.Thing}
Bar -> {test.Thing}
It's worth noting that if I expand on of the KeyValuePairs, I do see that:
Name | Value
--------+-------
Key | "Foo"
Value | DBG: 1
So the DebuggerDisplay does work.
So the problem is how to display the content of a composite type in the main watch-list of the dictionary's content?
c# visual-studio-debugging debuggerdisplay
asked Nov 18 '18 at 14:20
TarTar
3,17263379
In an attempt to pleasantly display a Dictionary's content, I wrote this:
[assembly: DebuggerDisplay("{Key,nq} -> {Value,nq}", Target = typeof(KeyValuePair<,>))]
namespace test {
[DebuggerDisplay("{DebuggerDisplay,nq}")]
public class Thing {
private readonly int _num;
public string DebuggerDisplay => $"DBG: {_num}";
public Thing(int num) => _num = num;
}
public class Program {
static void Main(string args) {
var map = new Dictionary<string,Thing> {
["Foo"] = new Thing(1),
["Bar"] = new Thing(2),
};
}
}
}
And I would've expected to see in the debugger this:
Foo -> DBG: 1
Bar -> DBG: 2
But instead I see this:
Foo -> {test.Thing}
Bar -> {test.Thing}
It's worth noting that if I expand on of the KeyValuePairs, I do see that:
Name | Value
--------+-------
Key | "Foo"
Value | DBG: 1
So the DebuggerDisplay does work.
So the problem is how to display the content of a composite type in the main watch-list of the dictionary's content?
c# visual-studio-debugging debuggerdisplay
c# visual-studio-debugging debuggerdisplay
asked Nov 18 '18 at 14:20
TarTar
3,17263379
asked Nov 18 '18 at 14:20
TarTar
3,17263379
asked Nov 18 '18 at 14:20
TarTar
3,17263379
asked Nov 18 '18 at 14:20
TarTar
3,17263379
asked Nov 18 '18 at 14:20
TarTar
3,17263379
3,17263379
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Though nested evaluation of DebuggerDisplay does not work it is actually flexible enough to call any custom formatting method with parameters. So I would do it like this:
[assembly:DebuggerDisplay("{Key,nq} -> {MyNamespace.DebugHelper.DisplayValue(this.Value),nq}", Target = typeof(KeyValuePair<,>))]
Where debug helper can be an internal helper class:
internal static class DebugHelper
{
internal static string DisplayValue(object value)
{
switch (value)
{
case Thing thing:
return thing.DebuggerDisplay; // or even better just to format it here
default:
return value.ToString();
}
}
}
answered Nov 18 '18 at 17:09
taffertaffer
8,09021536
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Though nested evaluation of DebuggerDisplay does not work it is actually flexible enough to call any custom formatting method with parameters. So I would do it like this:
[assembly:DebuggerDisplay("{Key,nq} -> {MyNamespace.DebugHelper.DisplayValue(this.Value),nq}", Target = typeof(KeyValuePair<,>))]
Where debug helper can be an internal helper class:
internal static class DebugHelper
{
internal static string DisplayValue(object value)
{
switch (value)
{
case Thing thing:
return thing.DebuggerDisplay; // or even better just to format it here
default:
return value.ToString();
}
}
}
answered Nov 18 '18 at 17:09
taffertaffer
8,09021536
add a comment |
Though nested evaluation of DebuggerDisplay does not work it is actually flexible enough to call any custom formatting method with parameters. So I would do it like this:
[assembly:DebuggerDisplay("{Key,nq} -> {MyNamespace.DebugHelper.DisplayValue(this.Value),nq}", Target = typeof(KeyValuePair<,>))]
Where debug helper can be an internal helper class:
internal static class DebugHelper
{
internal static string DisplayValue(object value)
{
switch (value)
{
case Thing thing:
return thing.DebuggerDisplay; // or even better just to format it here
default:
return value.ToString();
}
}
}
answered Nov 18 '18 at 17:09
taffertaffer
8,09021536
add a comment |
Though nested evaluation of DebuggerDisplay does not work it is actually flexible enough to call any custom formatting method with parameters. So I would do it like this:
[assembly:DebuggerDisplay("{Key,nq} -> {MyNamespace.DebugHelper.DisplayValue(this.Value),nq}", Target = typeof(KeyValuePair<,>))]
Where debug helper can be an internal helper class:
internal static class DebugHelper
{
internal static string DisplayValue(object value)
{
switch (value)
{
case Thing thing:
return thing.DebuggerDisplay; // or even better just to format it here
default:
return value.ToString();
}
}
}
answered Nov 18 '18 at 17:09
taffertaffer
8,09021536
Though nested evaluation of DebuggerDisplay does not work it is actually flexible enough to call any custom formatting method with parameters. So I would do it like this:
[assembly:DebuggerDisplay("{Key,nq} -> {MyNamespace.DebugHelper.DisplayValue(this.Value),nq}", Target = typeof(KeyValuePair<,>))]
Where debug helper can be an internal helper class:
internal static class DebugHelper
{
internal static string DisplayValue(object value)
{
switch (value)
{
case Thing thing:
return thing.DebuggerDisplay; // or even better just to format it here
default:
return value.ToString();
}
}
}
answered Nov 18 '18 at 17:09
taffertaffer
8,09021536
answered Nov 18 '18 at 17:09
taffertaffer
8,09021536
answered Nov 18 '18 at 17:09
taffertaffer
8,09021536
answered Nov 18 '18 at 17:09
taffertaffer
8,09021536
8,09021536
add a comment |
add a comment |
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