Pass Query string to mvc view action

Question

I want to return to same page with error message along with query string when the model is invalid in post operation

My code is here

public ActionResult Action1(string Key)
{

    // do something
}

[HttpPost]
public ActionResult Action1(Model user)
{
    if (ModelState.IsValid)
                {
    // do some stuff here
    }
    else
     // redirect to same page with query string key and also error message
}

Please suggest the line I need to add when the model is invalid to stay in the same page by showing the error message.

This might help you

hellogoodnight
– hellogoodnight

2015-11-02 11:28:38 +00:00
Commented Nov 2, 2015 at 11:28 — hellogoodnight
– hellogoodnight, Commented Nov 2, 2015 at 11:28

StepUp · Accepted Answer · 2015-11-02 11:52:39Z

3

public ActionResult Action1(Model user)
{
    if (ModelState.IsValid)
    {
       // all is okay
    }
    // If we got this far, something failed, redisplay form
    ModelState.AddModelError("", "The user name or password provided is incorrect.");
    return View(model);
}

answered Nov 2, 2015 at 11:52

StepUp

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Comments

Rahul Nikate · Accepted Answer · 2015-11-02 11:57:20Z

[HttpPost]
public ActionResult Action1(Model user)
{
    if (ModelState.IsValid)
    {
    // do some stuff here
    }
    else
    {
        return this.RedirectToAction ("Action1", new { value1 = "QueryStringValue" });
    }
}

That would return this :

/controller/Action1?value1=QueryStringValue

Also as per your comment.
You can use below approach for model instead of sending errors from controller to view for model failing.

    [Required]
    [DataType(DataType.Text)]
    [StringLength(40)]
    public string FirstName { get; set; }

    [Required]
    [DataType(DataType.Text)]
    [EmailAddress]
    public string Email { get; set; }

    [Required]
    [DataType(DataType.Password)]
    [StringLength(1000, MinimumLength = 8)]
    public string Password { get; set; }

    [Required]
    [System.Web.Mvc.Compare("Password")]
    [DataType(DataType.Password)]
    public string PasswordConfirmation { get; set; }

But here the error messages are not showing, this is equal to RedirectToAction(), I need view()
Sorry I didn't get you. What do you mean by not getting error messages?
If the model is invalid, I can show some error message like length should be more than 6 or the password and confirm password do not match, it is not showing

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