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ger
Asked: 2020-10-26 11:09:30 +0800 CST 2020-10-26 11:09:30 +0800 CST

MVC project pass Values ​​of a variable from GET method to POST method

  • 772

I have the following line of code in my GET method:

    // GET: Areas/Edit/5
    public async Task<ActionResult> Edit(int? id)
    {
        var Str = areas.NOMBRE;

and capture strin the POST method:

    [HttpPost]
    [ValidateAntiForgeryToken]
    public async Task<ActionResult> Edit([Bind(Include = ....)] Areas areas)
    {
        string StrPost = Str; //str que debe venir del get

I don't know if using a viewbag(I don't want it to be taken to the View) or what variable to use... I've already had it stras a global variable but whenever it enters the POST method it deletes the content of str.

c#

1 Answers

  1. Best Answer

    In the case you raise, the most recommended is to use Cookies to store your variable Globally and at the User level .

    Still, you can store your variable in TempData[], and you can use it only in the next Request ( [HttpPost] Edit()):

    // GET: Areas/Edit/5
public async Task<ActionResult> Edit(int? id)
{
    TempData["Str"] = areas.NOMBRE;
}

[HttpPost]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Edit([Bind(Include = ....)] Areas areas)
{
    string StrPost = TempData["Str"]; //str que debe venir del get

    As I mentioned, I would use Cookies (better encrypted). In this article you will see how to do it in ASP.NET MVC:

    Encrypt and decrypt cookies in an ASP.NET MVC application

    UPDATE:

    Things to note about TempData[]:

    • TempDatacan be used to store data between two consecutive requests. The values ​​of TempDatawill be preserved during redirection (Request). TempDatais a guy TempDataDictionary.
    • TempDataused internally Sessionto store the data. So think of it as a short session.
    • The value of TempDatamust be typed Castbefore use. Checks for null values ​​to avoid runtime errors.
    • TempDatacan be used to store only single messages such as error messages, validation messages, or short-term variables.
    • Used TempData.Keep()to keep all the values ​​of TempData in a third request.
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