Asp.net MVC action link-CodePudding

I am writing my first MVC app. While creating link for opening details view, I have to pass id.

In Controller method like as below:

public ActionResult getDetails(int UserMasetrId) 
{
    ...Some Code 
}

In VIEW link was generated as below:

<a title="View Details" href="@Url.Action("getDetails", "UserMaster", new {id=item.UserMasterId})"></a>

For above code link is generating as ...controllername/getDetails/13616. But it throws error:

"The parameters dictionary contains a null entry for parameter 'UserMasterId' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult getDetails(Int32)' in 'APP.Controllers.UserMasterController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter."

Now if I change action link as below?

<a title="View Details" href="@Url.Action("getDetails", "UserMaster", new {UserMasterId=item.UserMasterId})"></a>

It works fine but link change to ...controllername/getDetails?UserMasterId=13616

So please suggest any solution for parameter name as I write in action method and i want format of url not to show parameter name means the format of url should conrtoller/actionmethod/parametervalue.

CodePudding user response：

The parameter name in your function should match the query parameter in your button link.

<a title="View Details" href="@Url.Action("getDetails", "UserMaster", new { UserMasterId = item.UserMasterId})"></a>

You should also declare a Route if you're not using the default Id parameter.

[Route("ControllerName/getDetails/{UserMasterId}")]
public ActionResult getDetails(int? UserMasterId) 
{
   if (id == null)
   {
      return NotFound();
   }
}

CodePudding user response：

What you are using is not ActionLink. You are generating a link for you href action only. You can generate a proper a tag using the HtmlHelper: Html.ActionLink like this:

Html.ActionLink("", "getDetails", "UserMaster", new { item.UserMasterId }, null)

This will generate anchor tag like this assuming item.UserMasterId is 1:

<a href="/UserMaster/getDetails/1"></a>

And change your Controller method to:

public ActionResult getDetails(int? id) 
{
    ...Some Code 
}