Is the Expression in an HtmlHelper For method's signature solely for type checking the View?
expression
Expression<Func<TModel,TProperty>>
An expression that identifies the object that contains the properties to display.
DropDownListFor<TModel,TProperty>(HtmlHelper<TModel>,
Expression<Func<TModel,TProperty>>,
IEnumerable<SelectListItem>, String, IDictionary<String,Object>)
It is here.
Is the Linq Expression there solely for the View and compilation or other typing needed in ASP.NET MVC? I know what TModel is, but TProperty doesn't really show me much in Visual Studio. SelectListItem and the rest are self-explanatory.
I am confused because of this SO question.
Difference between DropDownlist or DropDownListFor Html helper
It seems it is for that and more, but I am not sure. This is more of a question on how to read the signature in Microsoft's Documentation and its implications. Sometimes is seems the Expression is for the View and doesn't really mean too much in the SelectList as people pass in the ViewBag with elements for Value and Text. Other times is looks like it actually contributes to what something displays, like in DropDownDisplayFor.
asp.net-mvc api function-signature
asked Nov 20 at 15:32
johnny
9,08541128208
add a comment |
expression
Expression<Func<TModel,TProperty>>
An expression that identifies the object that contains the properties to display.
DropDownListFor<TModel,TProperty>(HtmlHelper<TModel>,
Expression<Func<TModel,TProperty>>,
IEnumerable<SelectListItem>, String, IDictionary<String,Object>)
It is here.
Is the Linq Expression there solely for the View and compilation or other typing needed in ASP.NET MVC? I know what TModel is, but TProperty doesn't really show me much in Visual Studio. SelectListItem and the rest are self-explanatory.
I am confused because of this SO question.
Difference between DropDownlist or DropDownListFor Html helper
It seems it is for that and more, but I am not sure. This is more of a question on how to read the signature in Microsoft's Documentation and its implications. Sometimes is seems the Expression is for the View and doesn't really mean too much in the SelectList as people pass in the ViewBag with elements for Value and Text. Other times is looks like it actually contributes to what something displays, like in DropDownDisplayFor.
asp.net-mvc api function-signature
asked Nov 20 at 15:32
johnny
9,08541128208
1
Yes its for type checking (and in (say)@Html.DropDownListFor(m => m.SomeProperty, Model.YourSelectList),TModelissomeProperty). Both methods ultimately call the same internal helper methods to generate the html - the string typed***Formethods usestring expressionName = ExpressionHelper.GetExpressionText(expression);to convert the expression to the name of the property (refer source code)
– user3559349
Nov 20 at 22:22
@StephenMuecke How come "m" isn't TModel instead of someProperty? Why do they call the column the model (I guess it could be a table). Just what it means?
– johnny
Nov 21 at 4:45
1
Oops (typo) -misTModel- that was supposed to readTPropertyissomeProperty
– user3559349
Nov 21 at 4:46
add a comment |
expression
Expression<Func<TModel,TProperty>>
An expression that identifies the object that contains the properties to display.
DropDownListFor<TModel,TProperty>(HtmlHelper<TModel>,
Expression<Func<TModel,TProperty>>,
IEnumerable<SelectListItem>, String, IDictionary<String,Object>)
It is here.
Is the Linq Expression there solely for the View and compilation or other typing needed in ASP.NET MVC? I know what TModel is, but TProperty doesn't really show me much in Visual Studio. SelectListItem and the rest are self-explanatory.
I am confused because of this SO question.
Difference between DropDownlist or DropDownListFor Html helper
It seems it is for that and more, but I am not sure. This is more of a question on how to read the signature in Microsoft's Documentation and its implications. Sometimes is seems the Expression is for the View and doesn't really mean too much in the SelectList as people pass in the ViewBag with elements for Value and Text. Other times is looks like it actually contributes to what something displays, like in DropDownDisplayFor.
asp.net-mvc api function-signature
asked Nov 20 at 15:32
johnny
9,08541128208
expression
Expression<Func<TModel,TProperty>>
An expression that identifies the object that contains the properties to display.
DropDownListFor<TModel,TProperty>(HtmlHelper<TModel>,
Expression<Func<TModel,TProperty>>,
IEnumerable<SelectListItem>, String, IDictionary<String,Object>)
It is here.
Is the Linq Expression there solely for the View and compilation or other typing needed in ASP.NET MVC? I know what TModel is, but TProperty doesn't really show me much in Visual Studio. SelectListItem and the rest are self-explanatory.
I am confused because of this SO question.
Difference between DropDownlist or DropDownListFor Html helper
It seems it is for that and more, but I am not sure. This is more of a question on how to read the signature in Microsoft's Documentation and its implications. Sometimes is seems the Expression is for the View and doesn't really mean too much in the SelectList as people pass in the ViewBag with elements for Value and Text. Other times is looks like it actually contributes to what something displays, like in DropDownDisplayFor.
asp.net-mvc api function-signature
asp.net-mvc api function-signature
asked Nov 20 at 15:32
johnny
9,08541128208
asked Nov 20 at 15:32
johnny
9,08541128208
edited Nov 20 at 17:01
asked Nov 20 at 15:32
johnny
9,08541128208
asked Nov 20 at 15:32
johnny
9,08541128208
asked Nov 20 at 15:32
johnny
9,08541128208
9,08541128208
1
Yes its for type checking (and in (say)@Html.DropDownListFor(m => m.SomeProperty, Model.YourSelectList),TModelissomeProperty). Both methods ultimately call the same internal helper methods to generate the html - the string typed***Formethods usestring expressionName = ExpressionHelper.GetExpressionText(expression);to convert the expression to the name of the property (refer source code)
– user3559349
Nov 20 at 22:22
@StephenMuecke How come "m" isn't TModel instead of someProperty? Why do they call the column the model (I guess it could be a table). Just what it means?
– johnny
Nov 21 at 4:45
1
Oops (typo) -misTModel- that was supposed to readTPropertyissomeProperty
– user3559349
Nov 21 at 4:46
add a comment |
1
Yes its for type checking (and in (say)@Html.DropDownListFor(m => m.SomeProperty, Model.YourSelectList),TModelissomeProperty). Both methods ultimately call the same internal helper methods to generate the html - the string typed***Formethods usestring expressionName = ExpressionHelper.GetExpressionText(expression);to convert the expression to the name of the property (refer source code)
– user3559349
Nov 20 at 22:22
@StephenMuecke How come "m" isn't TModel instead of someProperty? Why do they call the column the model (I guess it could be a table). Just what it means?
– johnny
Nov 21 at 4:45
1
Oops (typo) -misTModel- that was supposed to readTPropertyissomeProperty
– user3559349
Nov 21 at 4:46
1
1
Yes its for type checking (and in (say)
@Html.DropDownListFor(m => m.SomeProperty, Model.YourSelectList), TModel is someProperty). Both methods ultimately call the same internal helper methods to generate the html - the string typed ***For methods use string expressionName = ExpressionHelper.GetExpressionText(expression); to convert the expression to the name of the property (refer source code)– user3559349
Nov 20 at 22:22
Yes its for type checking (and in (say)
@Html.DropDownListFor(m => m.SomeProperty, Model.YourSelectList), TModel is someProperty). Both methods ultimately call the same internal helper methods to generate the html - the string typed ***For methods use string expressionName = ExpressionHelper.GetExpressionText(expression); to convert the expression to the name of the property (refer source code)– user3559349
Nov 20 at 22:22
@StephenMuecke How come "m" isn't TModel instead of someProperty? Why do they call the column the model (I guess it could be a table). Just what it means?
– johnny
Nov 21 at 4:45
@StephenMuecke How come "m" isn't TModel instead of someProperty? Why do they call the column the model (I guess it could be a table). Just what it means?
– johnny
Nov 21 at 4:45
1
1
Oops (typo) -
m is TModel - that was supposed to read TProperty is someProperty– user3559349
Nov 21 at 4:46
Oops (typo) -
m is TModel - that was supposed to read TProperty is someProperty– user3559349
Nov 21 at 4:46
add a comment |
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1
Yes its for type checking (and in (say)
@Html.DropDownListFor(m => m.SomeProperty, Model.YourSelectList),TModelissomeProperty). Both methods ultimately call the same internal helper methods to generate the html - the string typed***Formethods usestring expressionName = ExpressionHelper.GetExpressionText(expression);to convert the expression to the name of the property (refer source code)– user3559349
Nov 20 at 22:22
@StephenMuecke How come "m" isn't TModel instead of someProperty? Why do they call the column the model (I guess it could be a table). Just what it means?
– johnny
Nov 21 at 4:45
1
Oops (typo) -
misTModel- that was supposed to readTPropertyissomeProperty– user3559349
Nov 21 at 4:46