i have an issue file instance always null , below is the code:
[HttpPost]
public ActionResult Create(ExamRegisterationModel model, HttpPostedFileBase file)
{
if (file != null && file.ContentLength > 0)
{
string path = AppDomain.CurrentDomain.BaseDirectory + "uploads/";
string filename = Path.GetFileName(Request.Files[0].FileName);
Request.Files[0].SaveAs(Path.Combine(path, filename));
}
}
Any Idea how to upload the file?
And my View :
<div class="input-group">
<label for="file">Upload Receipt:</label>
<input type="file" name="File" id="file" />
<input type="submit" name="Submit" id="Submit" value="upload" />
</div>
add a wrapper element.
<form action="/Controller/Create" method="post" enctype="multipart/form-data">
<div class="input-group">
<label for="file">Upload Receipt:</label>
<input type="file" name="File" id="file" />
<input type="submit" name="Submit" id="Submit" value="upload" />
</div>
</form>
It works after doing the following change:
#using (Html.BeginForm(new { enctype = "multipart/form-data" }))
Related
I am working on captcha authentication. I want to get user entered captcha value in controller's Index method. Below is my cshtml file code
#{
ViewData["Title"] = "Home Page";
}
<div class="container">
<label for="captcha"><b>Enter chaptcha - </b></label>
<label id="lblshowCaptcha"><b>#ViewData["captcha"]</b></label>
<input id="txtCapValue" type="text" placeholder="Enter captcha" name="cap" required>
<br/>
<button class="button" type="submit">Login</button>
<br />
</div>
When user entering captcha value in txtCapValue and click submit button I need that value in controller. Here is my controller
public IActionResult Index()
{
randnumber = RandomString(6);
ViewData["captcha"] = randnumber;
return View();
}
how can I get txtCapValue input control value when user click on submit button ?
One of the easy ways using the Form Tag Helper:
<form asp-controller="Controller_Name" asp-action="Captcha" method="post">
<div class="container">
<label for="captcha"><b>Enter chaptcha - </b></label>
<label id="lblshowCaptcha"><b>#ViewData["captcha"]</b></label>
<input id="txtCapValue" type="text" placeholder="Enter captcha" name="cap" required>
<br />
<button class="button" type="submit">Login</button>
<br />
</div>
</form>
And on the server side:
[HttpPost]
public IActionResult Captcha(string cap)
{
... using the `cap`
return View("Index");
}
I want to get user entered captcha value in controller's Index
method.
There are two options, you can try:
Option1: use Form Tag Helper
Index method:
public IActionResult Index(string cap)
{
ViewData["captcha"] = 6;//do your staff
return View();
}
Index view:
<form method="get" asp-action="Index">
<div class="container">
<label for="captcha"><b>Enter chaptcha - </b></label>
<label id="lblshowCaptcha"><b>#ViewData["captcha"]</b></label>
<input id="txtCapValue" type="text" placeholder="Enter captcha" name="cap" required>
<br />
<button class="button" type="submit">Login</button>
<br />
</div>
</form>
Option 2: use ajax
Index method:
public IActionResult Index(string cap)
{
ViewData["captcha"] = 6;
return View();
}
Index view:
<div class="container">
<label for="captcha"><b>Enter chaptcha - </b></label>
<label id="lblshowCaptcha"><b>#ViewData["captcha"]</b></label>
<input id="txtCapValue" type="text" placeholder="Enter captcha" name="cap" required>
<br />
<button id="buttonDemo1" class="button" type="submit">Login</button>
<br />
</div>
#section scripts{
<script type="text/javascript">
$(document).ready(function () {
$('#buttonDemo1').click(function () {
var cap = $("#txtCapValue");
$.ajax({
type: 'GET',
url: '/Home/Index',
data: cap
});
});
});
</script>
}
result:
I'm making a POST request through an MVC controller using ASP.NET MVC and while unit testing I'm getting 'Object reference not set to an instance of an Object' from an IHtmlFormElement's GetSubmission() method. The test finds the button and the button itself is not null, but when the test calls the GetSubmission() with the submit button as a parameter it returns null.
Everything works fine from browser.
This is my Add.cshtml file content:
#model MVCPhones.Data.Phone
<form method="post" asp-action="Add">
<div class="form-group">
<label asp-for="Make" class="control-label">Make</label>
<input asp-for="Make" type="text" class="form-control" />
</div>
<div class="form-group">
<label asp-for="Model" class="control-label">Model</label>
<input asp-for="Model" type="text" class="form-control" />
</div>
<div class="form-group">
<label asp-for="RAM" class="control-label">RAM</label>
<input asp-for="RAM" type="number" class="form-control" />
</div>
<div class="form-group">
<label asp-for="PublishDate" class="control-label">PublishDate</label>
<input asp-for="PublishDate" type="date" class="form-control" />
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
Here is my PhonesController post method:
public async Task<IActionResult> Add(Phone phone)
{
try
{
phone.Created = DateTime.Now;
phone.Modified = DateTime.Now;
await _context.Phones.AddAsync(phone);
await _context.SaveChangesAsync();
return RedirectToAction(nameof(Index));
}
catch
{
return View();
}
}
Here is the section that gives the error:
Error
I have following code on my view.
This HTML code is used for search in website.
This view is not strongly typed view, so I can apply use DataAnnotation through model.
What is best view to validate that, this textbox should accept only alpha numeric characters?
HTML
<form action="Search" method="post" >
<div class="col-md-8">
<input type="text" name="name" placeholder="search" class="fullwidth" onkeypress="return BlockingHtml(this,event);" />
</div>
<div class="col-md-4">
<input type="submit" title="Search" value="Search" />
</div>
</form>
Javascript
function BlockingHtml(txt) {
txt.value = txt.value.replace(/[^a-zA-Z 0-9\n\r.]+/g, '');
}
Model:-
[StringLength(100)]
[Display(Description = "Name")]
[RegularExpression("(/[^a-zA-Z 0-9\n\r.]+/g", ErrorMessage = "Enter only alphabets and numbers of Name")]
public string Name{ get; set; }
Updated:-
View:-
<form action="Search" method="post" >
<div class="col-md-8">
<input type="text" name="name" id="txt" placeholder="search" class="fullwidth" onkeypress="BlockingHtml(this);" />
</div>
<div class="col-md-4">
<input type="submit" title="Search" value="Search" />
</div>
</form>
function BlockingHtml(txt) {
txt.value = txt.value.replace(/[^a-zA-Z 0-9\n\r.]+/g, '');
}
<form action="Search" method="post" >
<div class="col-md-8">
<input type="text" name="name" placeholder="search" class="fullwidth" onblur="return BlockingHtml(this,event);" />
</div>
<div class="col-md-4">
<input type="submit" title="Search" value="Search" />
</div>
</form>
Changed event onkeypress to onblur.
How can I hide a webform button from controller action? or Do I do it in webform itself?
There is a condition to hide/disable the button:
if (StudentType != "Senior")
{
Hide Button
}
Display Button
View:
<form method="post" action="/Student/Dispatch/">
<label for="id">Student Number: </label>
<input type="text" name="id" value="" /> <br /><br />
<input type="submit" value="Get Student(xls)" name="xls" />  
<input type="submit" value="Get Student(pdf)" name="pdf" />
</form>
Controller:
[HttpPost]
public ActionResult Dispatch(string pdf, string id) {
if (!string.IsNullOrEmpty(pdf)) {
// GetPdf submit button was clicked
return StudentPdf(id);
}
// GetXls submit button was clicked
return StudentExcel(id);
}
You can use ViewData dictionary .
Controller:
if (StudentType != "Senior")
{
ViewData["isHideButton"] =true;
}
View:
<form method="post" action="/Student/Dispatch/">
<label for="id">Student Number: </label>
<input type="text" name="id" value="" /> <br /><br />
<% bool hideButton= false;
bool.TryParse(ViewData["isHideButton"],hideButton)%>
<%if(!hideButton)
{%>
<input type="submit" value="Get Student(xls)" name="xls" />
<%}%>
  <input type="submit" value="Get Student(pdf)" name="pdf" />
</form>
Is there any way to get information from my model during a result flagged HttpPost if I cannot pass it as a parameter?
[AcceptVerbs(HttpVerbs.Post)]
public FileUploadJsonResult Upload(HttpPostedFileBase file, IwantMyModelToo! )
I can't really get the actual view model to go through the method, though. Any thoughts?
Here is the primary view. (FoldersController)
<hr class="space" />
<div>
<% Html.RenderAction<Controllers.ImagesController>(i => i.Create(Model)); %>
</div>
<hr class="space" />
Here is the partial view (ImagesController, where the Create method resides)
// bunch of fun jQuery for jQuery Form Uploading.
</script>
<div class="span-24 last">
<fieldset>
<legend>Upload Image</legend>
<form id="ajaxUploadForm" action="<%= Url.Action("Upload", "Images")%>" method="post" enctype="multipart/form-data" >
<div>
<label for="file">Select Image</label><br />
<input type="file" name="file" />
</div>
<input id="ajaxUploadButton" type="submit" value="Upload" />
</form>
</fieldset>
</div>
In your code sample there are no properties connected to any model... Here I have added one (Foo) in a hidden form field, and created a class called MyModel.
View
<div class="span-24 last">
<fieldset>
<legend>Upload Image</legend>
<form id="ajaxUploadForm" action="<%= Url.Action("Upload", "Images")%>" method="post" enctype="multipart/form-data" >
<div>
<%= Html.Hidden("Foo", "bar") %>
</div>
<div>
<label for="file">Select Image</label><br />
<input type="file" name="file" />
</div>
<input id="ajaxUploadButton" type="submit" value="Upload" />
</form>
</fieldset>
</div>
Model
public class MyModel
{
public string Foo {get;set;}
}
Controller
public FileUploadJsonResult Upload(HttpPostedFileBase file, MyModel model)
{
//model.Foo should be accessible here
}