ViewBag vs Tempdata vs ViewData

Learn the difference among ViewBag vs Tempdata vs ViewData.

Here we look at what are the difference among ViewBag vs ViewData vs Tempdata in Asp.Net MVC

In earlier articles you have learned about ViewData , TempData and ViewBag in Asp.net MVC. Though they are very similar in nature, but here we learn about some differences

ViewBag, ViewData and Tempdata Difference

Here are some variables, we se how differently we can use them

@{
    ArrayList alColors = new ArrayList();
    alColors.Add("Red");
    alColors.Add("Green");
    alColors.Add("Yellow");
    alColors.Add("White");
}
@{
    string _courseName="Asp.net MVC";
}

Above two variables we will be storing in three different ways

ViewBag Example

@{
    ViewBag.Colors = alColors;
    ViewBag.CourseName =_courseName;
}

It is a type object

public object ViewBag { get; }

Works only during the current request

ViewData Example

@{
    ViewData["Colors"] = alColors;                             
    ViewData["CourseName"] =_courseName;
}

It is Key-Value Dictionary collection

public ViewDataDictionary ViewData { get; set; }

Works only during the current request

Difference between ViewBag and ViewData

ViewBag is a dynamic property, when ViewData is a dictionary object, use key value concept to store and retrieve value, in case of ViewBag we need to remember the name of dynamic property.

ViewBag is slower than ViewData.

Now let's understand TempData Example

@{
    TempData["Colors"]  = alColors;                            
    TempData["CourseName"] =_courseName;
}

It is Key-Value Dictionary collection

public TempDataDictionary TempData { get; set; }

TempData works during the current and subsequent request

Difference between ViewData and TempData

Like ViewData, TempData is also dictionary object, the difference is we can access the value stored in TempData in next redirected page only once, when we cannot access ViewData value from outside the current page.

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ViewBag vs ViewData vs Tempdata in Asp.net MVC

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