In this line:
@Html.ActionLink("Reply", "BlogReplyCommentAdd", "Blog",
new { blogPostId = blogPostId, replyblogPostmodel = Model,
captchaValid = Model.AddNewComment.DisplayCaptcha })
I get the following runtime error on blogPostId:
The parameters dictionary contains a null entry for parameter 'blogPostId' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult BlogReplyCommentAdd(Int32, Nop.Web.Models.Blogs.BlogPostModel, Boolean)' in 'Nop.Web.Controllers.BlogController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter. Parameter name: parameters
I have already assign a value for this on top such as
@{
var blogPostId = Model.Id;
}
My Controller:
public ActionResult BlogReplyCommentAdd(int blogPostId, BlogPostModel model, bool captchaValid)
{}
Am I doing something wrong? Please give me an example.
This question is related to
razor
asp.net-mvc-4
The problem must be with the value Model.Id which is null. You can confirm by assigning a value, e.g
@{
var blogPostId = 1;
}
If the error disappers, then u need to make sure that your model Id has a value before passing it to the view
You can pass values by using the below .
@Html.ActionLink("About", "About", "Home",new { name = ViewBag.Name }, htmlAttributes:null )
Controller:
public ActionResult About(string name)
{
ViewBag.Message = "Your application description page.";
ViewBag.NameTransfer = name;
return View();
}
And the URL looks like
http://localhost:50297/Home/About?name=My%20Name%20is%20Vijay
I have to pass two parameters like:
/Controller/Action/Param1Value/Param2Value
This way:
@Html.ActionLink(
linkText,
actionName,
controllerName,
routeValues: new {
Param1Name= Param1Value,
Param2Name = Param2Value
},
htmlAttributes: null
)
will generate this url
/Controller/Action/Param1Value?Param2Name=Param2Value
I used a workaround method by merging parameter two in parameter one and I get what I wanted:
@Html.ActionLink(
linkText,
actionName,
controllerName,
routeValues: new {
Param1Name= "Param1Value / Param2Value" ,
},
htmlAttributes: null
)
And I get :
/Controller/Action/Param1Value/Param2Value
Source: Stackoverflow.com