CODEWITHSUNDEEP
asp.netasp.net-mvcasp.net-mvc-4
gsiradze
gsiradze

Reputation: 4733

ViewBag in another action is null

I have this code:

public PartialViewResult studentsDiv(int? id)
        {
            if (id == null)
            {
                id = ViewBag.studentId;
            }
            else
            {
                ViewBag.studentId = id;
            }

            ACD_UNI_STUDENTS students = db.ACD_UNI_STUDENTS.Find(id);

            return PartialView(students);
        }

        public PartialViewResult personalStudentDetails()
        {
            int? id = int.Parse(ViewBag.studentId);
            ACD_UNI_STUDENTS students = db.ACD_UNI_STUDENTS.Find(id);

            return PartialView(students);
        }

but it throws an exception in int? id = int.Parse(ViewBag.studentId); it says that my viewbag is null. But it's actually not null because in first time it anyway goes in my studentsDiv action. When I'm debugging id is there for example 1 but on my personalStudentDetails this ViewBag is anyway null

and here's my view:

@Ajax.ActionLink("Full details", "studentsDiv", new
        {

        }, new AjaxOptions()
        {
            HttpMethod = "GET",
            UpdateTargetId = "studentsDiv",
            InsertionMode = InsertionMode.Replace
        }, new { @class = "sactive", id = Model.ID })
|
@Ajax.ActionLink("Partial details", "personalStudentDetails", new
        {

        }, new AjaxOptions()
        {
            HttpMethod = "GET",
            UpdateTargetId = "studentsDiv",
            InsertionMode = InsertionMode.Replace
        }, new { @class = "sactive", id = Model.ID })

Upvotes: 0

Views: 211

Answers (2)

user3559349
user3559349

Reputation:

Change your ActionLink() methods to pass the id as a route parameter to your methods (ditto for personalStudentDetails)

@Ajax.ActionLink("Full details", "studentsDiv", 
    new { id = Model.ID }, 
    new AjaxOptions()
    {
        HttpMethod = "GET",
        UpdateTargetId = "studentsDiv",
        InsertionMode = InsertionMode.Replace
    },
    new { @class = "sactive" }) // assume you don't really need an id attribute

Then the methods can be (assuming the ID property is not nullable)

public PartialViewResult studentsDiv(int id)
{
    ACD_UNI_STUDENTS students = db.ACD_UNI_STUDENTS.Find(id);
    return PartialView(students);
}

 public PartialViewResult personalStudentDetails(int id)
{
    ACD_UNI_STUDENTS students = db.ACD_UNI_STUDENTS.Find(id);
    return PartialView(students);
}

Upvotes: 2

Abbas Galiyakotwala
Abbas Galiyakotwala

Reputation: 3019

Rectify @Ajax.ActionLink() to

@Ajax.ActionLink("Partial details", "personalStudentDetails", new
        {
         id = Model.ID //Here value
        }, new AjaxOptions()
        {
            HttpMethod = "GET",
            UpdateTargetId = "studentsDiv",
            InsertionMode = InsertionMode.Replace
        }, new { @class = "sactive" })

Upvotes: 0

Related Questions