Cast to string won't let me use All() method
Writing an input validation:
public override ValidationResult Validate(object value, CultureInfo cultureInfo)
{
if ((string)value.All(c => Char.IsLetterOrDigit(c) || c.Equals('_')))
The "object value" coming back will be the text from a textbox. The error I get is:
object does not contain a definition for All and no accessible extension method 'All' accepting a first argument type 'object' could be found
Why can't I cast it to string and then use IEnumerable on it? It is a string beneath it all.
c# wpf linq
asked Nov 20 '18 at 0:15
linus72982linus72982
7401022
add a comment |
Writing an input validation:
public override ValidationResult Validate(object value, CultureInfo cultureInfo)
{
if ((string)value.All(c => Char.IsLetterOrDigit(c) || c.Equals('_')))
The "object value" coming back will be the text from a textbox. The error I get is:
object does not contain a definition for All and no accessible extension method 'All' accepting a first argument type 'object' could be found
Why can't I cast it to string and then use IEnumerable on it? It is a string beneath it all.
c# wpf linq
asked Nov 20 '18 at 0:15
linus72982linus72982
7401022
1
((string)value).All(...)
– DavidG
Nov 20 '18 at 0:16
1
Precedence -.binds before cast.
– NetMage
Nov 20 '18 at 0:17
add a comment |
Writing an input validation:
public override ValidationResult Validate(object value, CultureInfo cultureInfo)
{
if ((string)value.All(c => Char.IsLetterOrDigit(c) || c.Equals('_')))
The "object value" coming back will be the text from a textbox. The error I get is:
object does not contain a definition for All and no accessible extension method 'All' accepting a first argument type 'object' could be found
Why can't I cast it to string and then use IEnumerable on it? It is a string beneath it all.
c# wpf linq
asked Nov 20 '18 at 0:15
linus72982linus72982
7401022
Writing an input validation:
public override ValidationResult Validate(object value, CultureInfo cultureInfo)
{
if ((string)value.All(c => Char.IsLetterOrDigit(c) || c.Equals('_')))
The "object value" coming back will be the text from a textbox. The error I get is:
object does not contain a definition for All and no accessible extension method 'All' accepting a first argument type 'object' could be found
Why can't I cast it to string and then use IEnumerable on it? It is a string beneath it all.
c# wpf linq
c# wpf linq
asked Nov 20 '18 at 0:15
linus72982linus72982
7401022
asked Nov 20 '18 at 0:15
linus72982linus72982
7401022
asked Nov 20 '18 at 0:15
linus72982linus72982
7401022
asked Nov 20 '18 at 0:15
linus72982linus72982
7401022
asked Nov 20 '18 at 0:15
linus72982linus72982
7401022
7401022
1
((string)value).All(...)
– DavidG
Nov 20 '18 at 0:16
1
Precedence -.binds before cast.
– NetMage
Nov 20 '18 at 0:17
add a comment |
1
((string)value).All(...)
– DavidG
Nov 20 '18 at 0:16
1
Precedence -.binds before cast.
– NetMage
Nov 20 '18 at 0:17
1
1
((string)value).All(...)– DavidG
Nov 20 '18 at 0:16
((string)value).All(...)– DavidG
Nov 20 '18 at 0:16
1
1
Precedence -
. binds before cast.– NetMage
Nov 20 '18 at 0:17
Precedence -
. binds before cast.– NetMage
Nov 20 '18 at 0:17
add a comment |
1 Answer
1
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oldest
votes
The cast is acting on your entire statement, not just the value parameter. Wrap that in parentheses:
((string)value).All(...)
answered Nov 20 '18 at 0:17
DavidGDavidG
69.8k9111128
add a comment |
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The cast is acting on your entire statement, not just the value parameter. Wrap that in parentheses:
((string)value).All(...)
answered Nov 20 '18 at 0:17
DavidGDavidG
69.8k9111128
add a comment |
The cast is acting on your entire statement, not just the value parameter. Wrap that in parentheses:
((string)value).All(...)
answered Nov 20 '18 at 0:17
DavidGDavidG
69.8k9111128
add a comment |
The cast is acting on your entire statement, not just the value parameter. Wrap that in parentheses:
((string)value).All(...)
answered Nov 20 '18 at 0:17
DavidGDavidG
69.8k9111128
The cast is acting on your entire statement, not just the value parameter. Wrap that in parentheses:
((string)value).All(...)
answered Nov 20 '18 at 0:17
DavidGDavidG
69.8k9111128
answered Nov 20 '18 at 0:17
DavidGDavidG
69.8k9111128
answered Nov 20 '18 at 0:17
DavidGDavidG
69.8k9111128
answered Nov 20 '18 at 0:17
DavidGDavidG
69.8k9111128
69.8k9111128
add a comment |
add a comment |
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1
((string)value).All(...)– DavidG
Nov 20 '18 at 0:16
1
Precedence -
.binds before cast.– NetMage
Nov 20 '18 at 0:17