I have a situation where I need to pass two parameters to an action. I've been passing parameters to actions using the code below but I don't see how I pass multiple parameters. How do I do this?
#Html.ActionLink("Add Visit", "Create", "Visit", new { id = Model.Id }, null)
BTW - ASP.NET MVC 4 RC
You should separate the parameters with comma, like this:
#Html.ActionLink("Add Visit", "Create", "Visit",
new { id = Model.Id, secondParameter = Model.yourValue }, null)
Check the MSDN documentation for the ActionLink method.
Hope it helps!
I add from CodePlex called T4MVC.
This turns all your strings into a method call by using a combination of T4 templates and partial classes.
It will allow you to turn your ActionLink methods into a syntax checked method call.
#Html.ActionLink("Add Visit", "Create", "Visit", new { id = Model.Id }, null)
would be turned into
#Html.ActionLink("Add Visit", MVC.Visit.Create(Model.Id))
and
#Html.ActionLink("Add Visit", "Create", "Visit", new { id = Model.Id, Param2 = "Param2", Param3= "Param3Value" }, null)
#Html.ActionLink("Add Visit", MVC.Visit.Create(Model.Id, "Param2", "Param3Value"))
Its a life saver when you turn on compiled views.
Related
Probably it should be very easy but I am not sure that I did it correctly, so I want to ask you how to convert the code below to T4MVC syntax:
#Html.ActionLink("Log in", "Login", "Account", routeValues: null, htmlAttributes: new {id = "loginLink"})
I tried to do this code and it works fine but I am not sure I did it 100% correct.
#Html.ActionLink("Log in", MVC.Account.Login(null, null), htmlAttributes: new { id = "loginLink" })
The Login method signature is:
public virtual async Task<ActionResult> Login(LoginViewModel model, string returnUrl)
Thanks in advance.
Based on this example:
#Html.ActionLink("Delete Dinner", "Delete", "Dinners", new { id = Model.DinnerID }, null)
being transformed into this:
#Html.ActionLink("Delete Dinner", MVC.Dinners.Delete(Model.DinnerID))
Your implementation of ActionLink using T4MVC seems correct.
You include your link text - Log in
You include your Controller - Account
You include your Action Name/Method with parameters - Login(null, null)
The only thing that I can't find is the correct way to implement htmlAttributes but I was able to find this example. You might not even need to put htmlAttributes: new { id = "loginLink" }.. instead just try new { id = "loginLink" } and take out the htmlAttributes.
I hope this helps!
I'm VERY confused as to why this code
Html.ActionLink("About", "About", "Home", new { hidefocus = "hidefocus" })
results in this link:
<a hidefocus="hidefocus" href="/Home/About?Length=4">About</a>
The hidefocus part is what I was aiming to achieve, but where does the ?Length=4 come from?
The Length=4 is coming from an attempt to serialize a string object. Your code is running this ActionLink method:
public static string ActionLink(this HtmlHelper htmlHelper, string linkText, string actionName, object routeValues, object htmlAttributes)
This takes a string object "Home" for routeValues, which the MVC plumbing searches for public properties turning them into route values. In the case of a string object, the only public property is Length, and since there will be no routes defined with a Length parameter it appends the property name and value as a query string parameter. You'll probably find if you run this from a page not on HomeController it will throw an error about a missing About action method. Try using the following:
Html.ActionLink("About", "About", new { controller = "Home" }, new { hidefocus = "hidefocus" })
The way I solved this is was adding a null to the fourth parameter before the anonymous declaration (new {}) so that it uses the following method overload: (linkText, actionName, controllerName, routeValues, htmlAttributes):
Html.ActionLink("About", "About", "Home", null, new { hidefocus = "hidefocus" })
You forgot to add the HTMLAttributes parm.
This will work without any changes:
Html.ActionLink("About", "About", "Home", new { hidefocus = "hidefocus" },null)
The parameters to ActionLink are not correct, it's attempting to use the "Home" value as a route value, instead of the anonymous type.
I believe you just need to add new { } or null as the last parameter.
EDIT: Just re-read the post and realized you'll likely want to specify null as the second last parameter, not the last.
Html.ActionLink("About", "About", "Home", new { hidefocus = "hidefocus" }, new { })
This will take the overload:
string linkText, string actionName, string controllerName, Object routeValues, Object htmlAttributes
Just remove "Home" (name of the controller) so that the code would be:
Html.ActionLink("About", "About", new { hidefocus = "hidefocus" })
Kindly use right overloaded method with five (5) parameters. Example:
#using (#Ajax.BeginForm("Register", "Account", null,
new AjaxOptions
{
HttpMethod = "POST",
OnSuccess = "OnSuccess",
OnFailure = "OnFailure",
OnBegin = "OnBegin",
OnComplete = "OnComplete"
}, new { #class = "form-login" }))
This worked fine
#Html.ActionLink("Informationen", "About", "Home", new { area = "" }, new { #class = "nav-link" })
added new { area = "" }.
As Jonathon Watney pointed out in a comment, this also goes for
Html.BeginForm()
methods. In my case, I was in a Create.cshtml targeting the post request of the corresponding controller + Create action and had
using (Html.BeginForm("Create")) {
#Html.AntiForgeryToken()
...
}
which was adding the querystring "?Length=6" to the form action when rendered. Hinted by roryf's approved answer and realizing the string length of "Create" is 6, I finally solved this by removing the explicit action specification:
using (Html.BeginForm()) {
#Html.AntiForgeryToken()
...
}
With attribute names:
#Html.ActionLink(linkText: "SomeText", actionName: "SomeAction", controllerName: "SomeControllerName", routeValues: new { parameterName = parameterValue}, htmlAttributes: null)
Perhaps others had the same issue and need to supply a class value via HTMLAttributes parm.
Here's my solution:
#Html.ActionLink("About", "About", new { controller = "Home", area = "" }, new { hidefocus = "hidefocus", #class = "nav-item nav-link" })
Search for an answer to my question landed me here, basically it's the selection of correct overload of #Html.ActionLink
which matters.
I was selecting an overload which didn't exist, (without the last null), and MVC had no such overload, resulting in a false URL something like the OP mentioned.
A personal note: you can use anonymous types doesn't mean you can use any of the overloads- which do not exist? - make certain: it has to be defined!
- Came here in times of MVC 5.2
I have this code and would like to add a class to the link. Is it possible to do this in MVC3?
Html.ActionLink("Create New", "Create")
Yes, you can just add another parameter with object representing css class:
Html.ActionLink("Create New", "Create", CONTROLLERNAME, null, new { #class= "yourCSSclass"} )
It can be translated to:
Html.ActionLink(link text, action name, controller name, route values object, html attributes object)
Edit:
To add custom styles, use this:
Html.ActionLink(
"Create New",
"Create",
CONTROLLERNAME,
null,
new { #class= "yourCSSclass", #style= "width:100px; color: red;" }
)
#Html.ActionLink("ClickMe", // link text
"Index", // action name
"Home", // controller
new { id = 2131 }, // (optional) route values
new { #class = "someClass" }) // html attributes
Html.ActionLink("Create New", "Create", null, htmlAttributes: new { #class = "className" })
You can use the ActionLink overload which takes an htmlAttributes parameter to add a class to the generated element:
Html.ActionLink("Create New", "Create", new {}, new { #class = cssClass });
According to the documentation, this should do the trick:
Html.ActionLink("LinkText", "Action", "Controller", new { }, new {#class="css class"})
Edit: Thanks for noticing Dampe, I updated the code sample.
I've got a view that defines a form as
<% using (Html.BeginForm( "Update", "CcisCase", FormMethod.Post, new { id = "ccisEditForm" } ))
with a submit button:
In the RegisterRoutes method (in the HttpApplication-derived class in global.asax.cs), I've got:
routes.IgnoreRoute( "{resource}.axd/{*pathInfo}" );
routes.MapRoute(
"CcisCase",
"CcisCase/{action}/{cmDatabaseId}/{caseId}",
new { Controller = "CcisCase", Action = "CcisCaseEdit", caseId = "" } );
The url generated by MVC ends with "/Update" but there are no parameters. What am I doing wrong?
Thanks,
Bob
What parameters are you expecting to see? A post does not append parameters to the querystring, a FormMethod.Get would. And, that overload with the id is the collection of HTML attributes to render for the tag (which I'm assuming you knew, but just in case).
HTH.
Your route contains a parameter {caseId} but your BeginForm only defines an id value.
new {id = "cssEditForm"}
You need something like this to include the caseId value
using (Html.BeginForm( "Update", "CcisCase", FormMethod.Post, new { caseId = 1, id = "ccisEditForm" }
If your action isn't using the id="ccisEditForm" value then you can remove that for less code clutter.
I figured out what my problem was. I had to pass the existing route data as follows:
using (Html.BeginForm( "Update", "CcisCase", ViewContext.RouteData.Values, FormMethod.Post, new Dictionary<string, object> { { "id", "ccisEditForm" } } ))
I'm VERY confused as to why this code
Html.ActionLink("About", "About", "Home", new { hidefocus = "hidefocus" })
results in this link:
<a hidefocus="hidefocus" href="/Home/About?Length=4">About</a>
The hidefocus part is what I was aiming to achieve, but where does the ?Length=4 come from?
The Length=4 is coming from an attempt to serialize a string object. Your code is running this ActionLink method:
public static string ActionLink(this HtmlHelper htmlHelper, string linkText, string actionName, object routeValues, object htmlAttributes)
This takes a string object "Home" for routeValues, which the MVC plumbing searches for public properties turning them into route values. In the case of a string object, the only public property is Length, and since there will be no routes defined with a Length parameter it appends the property name and value as a query string parameter. You'll probably find if you run this from a page not on HomeController it will throw an error about a missing About action method. Try using the following:
Html.ActionLink("About", "About", new { controller = "Home" }, new { hidefocus = "hidefocus" })
The way I solved this is was adding a null to the fourth parameter before the anonymous declaration (new {}) so that it uses the following method overload: (linkText, actionName, controllerName, routeValues, htmlAttributes):
Html.ActionLink("About", "About", "Home", null, new { hidefocus = "hidefocus" })
You forgot to add the HTMLAttributes parm.
This will work without any changes:
Html.ActionLink("About", "About", "Home", new { hidefocus = "hidefocus" },null)
The parameters to ActionLink are not correct, it's attempting to use the "Home" value as a route value, instead of the anonymous type.
I believe you just need to add new { } or null as the last parameter.
EDIT: Just re-read the post and realized you'll likely want to specify null as the second last parameter, not the last.
Html.ActionLink("About", "About", "Home", new { hidefocus = "hidefocus" }, new { })
This will take the overload:
string linkText, string actionName, string controllerName, Object routeValues, Object htmlAttributes
Just remove "Home" (name of the controller) so that the code would be:
Html.ActionLink("About", "About", new { hidefocus = "hidefocus" })
Kindly use right overloaded method with five (5) parameters. Example:
#using (#Ajax.BeginForm("Register", "Account", null,
new AjaxOptions
{
HttpMethod = "POST",
OnSuccess = "OnSuccess",
OnFailure = "OnFailure",
OnBegin = "OnBegin",
OnComplete = "OnComplete"
}, new { #class = "form-login" }))
This worked fine
#Html.ActionLink("Informationen", "About", "Home", new { area = "" }, new { #class = "nav-link" })
added new { area = "" }.
As Jonathon Watney pointed out in a comment, this also goes for
Html.BeginForm()
methods. In my case, I was in a Create.cshtml targeting the post request of the corresponding controller + Create action and had
using (Html.BeginForm("Create")) {
#Html.AntiForgeryToken()
...
}
which was adding the querystring "?Length=6" to the form action when rendered. Hinted by roryf's approved answer and realizing the string length of "Create" is 6, I finally solved this by removing the explicit action specification:
using (Html.BeginForm()) {
#Html.AntiForgeryToken()
...
}
With attribute names:
#Html.ActionLink(linkText: "SomeText", actionName: "SomeAction", controllerName: "SomeControllerName", routeValues: new { parameterName = parameterValue}, htmlAttributes: null)
Perhaps others had the same issue and need to supply a class value via HTMLAttributes parm.
Here's my solution:
#Html.ActionLink("About", "About", new { controller = "Home", area = "" }, new { hidefocus = "hidefocus", #class = "nav-item nav-link" })
Search for an answer to my question landed me here, basically it's the selection of correct overload of #Html.ActionLink
which matters.
I was selecting an overload which didn't exist, (without the last null), and MVC had no such overload, resulting in a false URL something like the OP mentioned.
A personal note: you can use anonymous types doesn't mean you can use any of the overloads- which do not exist? - make certain: it has to be defined!
- Came here in times of MVC 5.2