How to check if object is an array of a certain type?
This works fine:
var expectedType = typeof(string);
object value = "...";
if (value.GetType().IsAssignableFrom(expectedType))
{
...
}
But how do I check if value is a string array without setting expectedType to typeof(string)? I want to do something like:
var expectedType = typeof(string);
object value = new {"...", "---"};
if (value.GetType().IsArrayOf(expectedType)) // <---
{
...
}
Is this possible?
c# .net arrays reflection types
edited Mar 11 '11 at 15:32
Oded
409k70744910
asked Mar 11 '11 at 15:30
AllrameestAllrameest
2,30912446
add a comment |
This works fine:
var expectedType = typeof(string);
object value = "...";
if (value.GetType().IsAssignableFrom(expectedType))
{
...
}
But how do I check if value is a string array without setting expectedType to typeof(string)? I want to do something like:
var expectedType = typeof(string);
object value = new {"...", "---"};
if (value.GetType().IsArrayOf(expectedType)) // <---
{
...
}
Is this possible?
c# .net arrays reflection types
edited Mar 11 '11 at 15:32
Oded
409k70744910
asked Mar 11 '11 at 15:30
AllrameestAllrameest
2,30912446
1
Do you want to know if the object was declared as a string. or if an object contains only instances of a certain type?
– Chris Marasti-Georg
Mar 11 '11 at 15:34
add a comment |
This works fine:
var expectedType = typeof(string);
object value = "...";
if (value.GetType().IsAssignableFrom(expectedType))
{
...
}
But how do I check if value is a string array without setting expectedType to typeof(string)? I want to do something like:
var expectedType = typeof(string);
object value = new {"...", "---"};
if (value.GetType().IsArrayOf(expectedType)) // <---
{
...
}
Is this possible?
c# .net arrays reflection types
edited Mar 11 '11 at 15:32
Oded
409k70744910
asked Mar 11 '11 at 15:30
AllrameestAllrameest
2,30912446
This works fine:
var expectedType = typeof(string);
object value = "...";
if (value.GetType().IsAssignableFrom(expectedType))
{
...
}
But how do I check if value is a string array without setting expectedType to typeof(string)? I want to do something like:
var expectedType = typeof(string);
object value = new {"...", "---"};
if (value.GetType().IsArrayOf(expectedType)) // <---
{
...
}
Is this possible?
c# .net arrays reflection types
c# .net arrays reflection types
edited Mar 11 '11 at 15:32
Oded
409k70744910
asked Mar 11 '11 at 15:30
AllrameestAllrameest
2,30912446
edited Mar 11 '11 at 15:32
Oded
409k70744910
asked Mar 11 '11 at 15:30
AllrameestAllrameest
2,30912446
edited Mar 11 '11 at 15:32
Oded
409k70744910
edited Mar 11 '11 at 15:32
Oded
409k70744910
edited Mar 11 '11 at 15:32
Oded
409k70744910
409k70744910
asked Mar 11 '11 at 15:30
AllrameestAllrameest
2,30912446
asked Mar 11 '11 at 15:30
AllrameestAllrameest
2,30912446
asked Mar 11 '11 at 15:30
AllrameestAllrameest
2,30912446
2,30912446
1
Do you want to know if the object was declared as a string. or if an object contains only instances of a certain type?
– Chris Marasti-Georg
Mar 11 '11 at 15:34
add a comment |
1
Do you want to know if the object was declared as a string. or if an object contains only instances of a certain type?
– Chris Marasti-Georg
Mar 11 '11 at 15:34
1
1
Do you want to know if the object was declared as a string. or if an object contains only instances of a certain type?
– Chris Marasti-Georg
Mar 11 '11 at 15:34
Do you want to know if the object was declared as a string. or if an object contains only instances of a certain type?
– Chris Marasti-Georg
Mar 11 '11 at 15:34
add a comment |
6 Answers
6
active
oldest
votes
Use Type.IsArray and Type.GetElementType() to check the element type of an array.
Type valueType = value.GetType();
if (valueType.IsArray && expectedType.IsAssignableFrom(valueType.GetElementType())
{
...
}
Beware the Type.IsAssignableFrom(). If you want to check the type for an exact match you should check for equality (typeA == typeB). If you want to check if a given type is the type itself or a subclass (or an interface) then you should use Type.IsAssignableFrom():
typeof(BaseClass).IsAssignableFrom(typeof(ExpectedSubclass))
answered Mar 11 '11 at 15:34
StefanStefan
12.4k14755
add a comment |
You can use extension methods (not that you have to but makes it more readable):
public static class TypeExtensions
{
public static bool IsArrayOf<T>(this Type type)
{
return type == typeof (T);
}
}
And then use:
Console.WriteLine(new string[0].GetType().IsArrayOf<string>());
answered Mar 11 '11 at 15:37
AliostadAliostad
69.2k13134190
add a comment |
The neatest and securest way to do it that found is using MakeArrayType:
var expectedType = typeof(string);
object value = new {"...", "---"};
if (value.GetType() == expectedType.MakeArrayType())
{
...
}
answered Dec 19 '12 at 16:56
NatxoNatxo
2,49511832
add a comment |
value.GetType().GetElementType() == typeof(string)
as an added bonus (but I'm not 100% sure. This is the code I use...)
var ienum = value.GetType().GetInterface("IEnumerable`1");
if (ienum != null) {
var baseTypeForIEnum = ienum.GetGenericArguments()[0]
}
with this you can look for List, IEnumerable... and get the T.
answered Mar 11 '11 at 15:38
xanatosxanatos
88.9k7140196
17
That's one risky magic string right there
– Kieren Johnstone
Nov 17 '12 at 11:16
add a comment |
Do you actually need to know the type of the array? Or do you only need the elements to be of a certain type?
If the latter, you can simply filter only the elements that match what you want:
string strings = array.OfType<string>();
answered Mar 11 '11 at 15:36
jdmichaljdmichal
9,36533437
add a comment |
if(objVal.GetType().Name == "Object")
true for array
answered Apr 19 '18 at 17:49
snbsnb
16518
add a comment |
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6 Answers
6
active
oldest
votes
6 Answers
6
active
oldest
votes
active
oldest
votes
active
oldest
votes
Use Type.IsArray and Type.GetElementType() to check the element type of an array.
Type valueType = value.GetType();
if (valueType.IsArray && expectedType.IsAssignableFrom(valueType.GetElementType())
{
...
}
Beware the Type.IsAssignableFrom(). If you want to check the type for an exact match you should check for equality (typeA == typeB). If you want to check if a given type is the type itself or a subclass (or an interface) then you should use Type.IsAssignableFrom():
typeof(BaseClass).IsAssignableFrom(typeof(ExpectedSubclass))
answered Mar 11 '11 at 15:34
StefanStefan
12.4k14755
add a comment |
Use Type.IsArray and Type.GetElementType() to check the element type of an array.
Type valueType = value.GetType();
if (valueType.IsArray && expectedType.IsAssignableFrom(valueType.GetElementType())
{
...
}
Beware the Type.IsAssignableFrom(). If you want to check the type for an exact match you should check for equality (typeA == typeB). If you want to check if a given type is the type itself or a subclass (or an interface) then you should use Type.IsAssignableFrom():
typeof(BaseClass).IsAssignableFrom(typeof(ExpectedSubclass))
answered Mar 11 '11 at 15:34
StefanStefan
12.4k14755
add a comment |
Use Type.IsArray and Type.GetElementType() to check the element type of an array.
Type valueType = value.GetType();
if (valueType.IsArray && expectedType.IsAssignableFrom(valueType.GetElementType())
{
...
}
Beware the Type.IsAssignableFrom(). If you want to check the type for an exact match you should check for equality (typeA == typeB). If you want to check if a given type is the type itself or a subclass (or an interface) then you should use Type.IsAssignableFrom():
typeof(BaseClass).IsAssignableFrom(typeof(ExpectedSubclass))
answered Mar 11 '11 at 15:34
StefanStefan
12.4k14755
Use Type.IsArray and Type.GetElementType() to check the element type of an array.
Type valueType = value.GetType();
if (valueType.IsArray && expectedType.IsAssignableFrom(valueType.GetElementType())
{
...
}
Beware the Type.IsAssignableFrom(). If you want to check the type for an exact match you should check for equality (typeA == typeB). If you want to check if a given type is the type itself or a subclass (or an interface) then you should use Type.IsAssignableFrom():
typeof(BaseClass).IsAssignableFrom(typeof(ExpectedSubclass))
answered Mar 11 '11 at 15:34
StefanStefan
12.4k14755
edited Mar 11 '11 at 15:48
answered Mar 11 '11 at 15:34
StefanStefan
12.4k14755
answered Mar 11 '11 at 15:34
StefanStefan
12.4k14755
answered Mar 11 '11 at 15:34
StefanStefan
12.4k14755
12.4k14755
add a comment |
add a comment |
You can use extension methods (not that you have to but makes it more readable):
public static class TypeExtensions
{
public static bool IsArrayOf<T>(this Type type)
{
return type == typeof (T);
}
}
And then use:
Console.WriteLine(new string[0].GetType().IsArrayOf<string>());
answered Mar 11 '11 at 15:37
AliostadAliostad
69.2k13134190
add a comment |
You can use extension methods (not that you have to but makes it more readable):
public static class TypeExtensions
{
public static bool IsArrayOf<T>(this Type type)
{
return type == typeof (T);
}
}
And then use:
Console.WriteLine(new string[0].GetType().IsArrayOf<string>());
answered Mar 11 '11 at 15:37
AliostadAliostad
69.2k13134190
add a comment |
You can use extension methods (not that you have to but makes it more readable):
public static class TypeExtensions
{
public static bool IsArrayOf<T>(this Type type)
{
return type == typeof (T);
}
}
And then use:
Console.WriteLine(new string[0].GetType().IsArrayOf<string>());
answered Mar 11 '11 at 15:37
AliostadAliostad
69.2k13134190
You can use extension methods (not that you have to but makes it more readable):
public static class TypeExtensions
{
public static bool IsArrayOf<T>(this Type type)
{
return type == typeof (T);
}
}
And then use:
Console.WriteLine(new string[0].GetType().IsArrayOf<string>());
answered Mar 11 '11 at 15:37
AliostadAliostad
69.2k13134190
answered Mar 11 '11 at 15:37
AliostadAliostad
69.2k13134190
answered Mar 11 '11 at 15:37
AliostadAliostad
69.2k13134190
answered Mar 11 '11 at 15:37
AliostadAliostad
69.2k13134190
69.2k13134190
add a comment |
add a comment |
The neatest and securest way to do it that found is using MakeArrayType:
var expectedType = typeof(string);
object value = new {"...", "---"};
if (value.GetType() == expectedType.MakeArrayType())
{
...
}
answered Dec 19 '12 at 16:56
NatxoNatxo
2,49511832
add a comment |
The neatest and securest way to do it that found is using MakeArrayType:
var expectedType = typeof(string);
object value = new {"...", "---"};
if (value.GetType() == expectedType.MakeArrayType())
{
...
}
answered Dec 19 '12 at 16:56
NatxoNatxo
2,49511832
add a comment |
The neatest and securest way to do it that found is using MakeArrayType:
var expectedType = typeof(string);
object value = new {"...", "---"};
if (value.GetType() == expectedType.MakeArrayType())
{
...
}
answered Dec 19 '12 at 16:56
NatxoNatxo
2,49511832
The neatest and securest way to do it that found is using MakeArrayType:
var expectedType = typeof(string);
object value = new {"...", "---"};
if (value.GetType() == expectedType.MakeArrayType())
{
...
}
answered Dec 19 '12 at 16:56
NatxoNatxo
2,49511832
edited Apr 29 '16 at 9:14
answered Dec 19 '12 at 16:56
NatxoNatxo
2,49511832
answered Dec 19 '12 at 16:56
NatxoNatxo
2,49511832
answered Dec 19 '12 at 16:56
NatxoNatxo
2,49511832
2,49511832
add a comment |
add a comment |
value.GetType().GetElementType() == typeof(string)
as an added bonus (but I'm not 100% sure. This is the code I use...)
var ienum = value.GetType().GetInterface("IEnumerable`1");
if (ienum != null) {
var baseTypeForIEnum = ienum.GetGenericArguments()[0]
}
with this you can look for List, IEnumerable... and get the T.
answered Mar 11 '11 at 15:38
xanatosxanatos
88.9k7140196
17
That's one risky magic string right there
– Kieren Johnstone
Nov 17 '12 at 11:16
add a comment |
value.GetType().GetElementType() == typeof(string)
as an added bonus (but I'm not 100% sure. This is the code I use...)
var ienum = value.GetType().GetInterface("IEnumerable`1");
if (ienum != null) {
var baseTypeForIEnum = ienum.GetGenericArguments()[0]
}
with this you can look for List, IEnumerable... and get the T.
answered Mar 11 '11 at 15:38
xanatosxanatos
88.9k7140196
17
That's one risky magic string right there
– Kieren Johnstone
Nov 17 '12 at 11:16
add a comment |
value.GetType().GetElementType() == typeof(string)
as an added bonus (but I'm not 100% sure. This is the code I use...)
var ienum = value.GetType().GetInterface("IEnumerable`1");
if (ienum != null) {
var baseTypeForIEnum = ienum.GetGenericArguments()[0]
}
with this you can look for List, IEnumerable... and get the T.
answered Mar 11 '11 at 15:38
xanatosxanatos
88.9k7140196
value.GetType().GetElementType() == typeof(string)
as an added bonus (but I'm not 100% sure. This is the code I use...)
var ienum = value.GetType().GetInterface("IEnumerable`1");
if (ienum != null) {
var baseTypeForIEnum = ienum.GetGenericArguments()[0]
}
with this you can look for List, IEnumerable... and get the T.
answered Mar 11 '11 at 15:38
xanatosxanatos
88.9k7140196
edited Mar 11 '11 at 15:46
answered Mar 11 '11 at 15:38
xanatosxanatos
88.9k7140196
answered Mar 11 '11 at 15:38
xanatosxanatos
88.9k7140196
answered Mar 11 '11 at 15:38
xanatosxanatos
88.9k7140196
88.9k7140196
17
That's one risky magic string right there
– Kieren Johnstone
Nov 17 '12 at 11:16
add a comment |
17
That's one risky magic string right there
– Kieren Johnstone
Nov 17 '12 at 11:16
17
17
That's one risky magic string right there
– Kieren Johnstone
Nov 17 '12 at 11:16
That's one risky magic string right there
– Kieren Johnstone
Nov 17 '12 at 11:16
add a comment |
Do you actually need to know the type of the array? Or do you only need the elements to be of a certain type?
If the latter, you can simply filter only the elements that match what you want:
string strings = array.OfType<string>();
answered Mar 11 '11 at 15:36
jdmichaljdmichal
9,36533437
add a comment |
Do you actually need to know the type of the array? Or do you only need the elements to be of a certain type?
If the latter, you can simply filter only the elements that match what you want:
string strings = array.OfType<string>();
answered Mar 11 '11 at 15:36
jdmichaljdmichal
9,36533437
add a comment |
Do you actually need to know the type of the array? Or do you only need the elements to be of a certain type?
If the latter, you can simply filter only the elements that match what you want:
string strings = array.OfType<string>();
answered Mar 11 '11 at 15:36
jdmichaljdmichal
9,36533437
Do you actually need to know the type of the array? Or do you only need the elements to be of a certain type?
If the latter, you can simply filter only the elements that match what you want:
string strings = array.OfType<string>();
answered Mar 11 '11 at 15:36
jdmichaljdmichal
9,36533437
answered Mar 11 '11 at 15:36
jdmichaljdmichal
9,36533437
answered Mar 11 '11 at 15:36
jdmichaljdmichal
9,36533437
answered Mar 11 '11 at 15:36
jdmichaljdmichal
9,36533437
9,36533437
add a comment |
add a comment |
if(objVal.GetType().Name == "Object")
true for array
answered Apr 19 '18 at 17:49
snbsnb
16518
add a comment |
if(objVal.GetType().Name == "Object")
true for array
answered Apr 19 '18 at 17:49
snbsnb
16518
add a comment |
if(objVal.GetType().Name == "Object")
true for array
answered Apr 19 '18 at 17:49
snbsnb
16518
if(objVal.GetType().Name == "Object")
true for array
answered Apr 19 '18 at 17:49
snbsnb
16518
answered Apr 19 '18 at 17:49
snbsnb
16518
answered Apr 19 '18 at 17:49
snbsnb
16518
answered Apr 19 '18 at 17:49
snbsnb
16518
16518
add a comment |
add a comment |
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1
Do you want to know if the object was declared as a string. or if an object contains only instances of a certain type?
– Chris Marasti-Georg
Mar 11 '11 at 15:34