For the possible duplicate, I already know how to preview my image before uploading it, my issue as detailed below is that when I submit the Form, the image is being received as null.
I am trying to submit a form to an MVC controller that should submit a model, a string, and an Image File,
I made sure that the input has the same name as the parameter within the controller
Following is the Form Initialization code
#using (Html.BeginRouteForm(Sitecore.Mvc.Configuration.MvcSettings.SitecoreRouteName,
new
{
calendar = System.Convert.ToString(Request.QueryString["calendar"]),
ID = System.Convert.ToString(Request.QueryString["id"])
},
FormMethod.Post, new { enctype = "multipart/form-data" }))
{
//Model Input
<input style="opacity: 0;" name="EventImage" type="file" accept="image/jpeg, image/jpg" id="ImageUpload" onchange="readURL(this);" />
}
And the Controller Header
[HttpPost]
[ValidateInput(false)]
public ActionResult AddEvent(Event model, string calendar, HttpPostedFileBase EventImage)
The EventImage Parameter is being returned null and I can't seem to figure out why.
I thought that the ID might be causing the problem so I changed the name attribute to ImageUpload as well as the Parameter within the controller but to no avail as the value is still null.
Additional Info: when a User uploads an image, I let them preview it in an Image box, could that be causing it?
Thanks,
Update:
Here is the code for the readURL function
function readURL(input) {
if (input.files && input.files[0]) {
var ImageCorrect = false;
var file = input.files[0];
var reader = new FileReader();
reader.onload = function (e) {
// Concatenate our HTML image info
var ext = file.name.match(/\.([^\.]+)$/)[1];
switch (ext) {
case 'jpg':
case 'jpeg':
case 'JPG':
case 'JPEG':
{
if ((Math.round(file.size / 1024)) > 500) {
alert('Image is too Large');
}
else {
var image = new Image();
image.src = e.target.result;
image.onload = function () {
var width = parseInt(image.width);
if (width <= 500) {
$('#previewImage').attr('src', e.target.result);
$('#previewImage').show();
}
else {
alert('Image width exceeds maximum width');
}
}
}
}
break;
default:
alert('Image type not allowed')
}
}
reader.readAsDataURL(input.files[0]);
}
}
If I understood your question right you are trying to submit a file from your form to your controller and you get null in the controller.
I did this before, check the following:
cshtml (you can add your attributes to event image like JS call...etc ):
<div class="form-group">
#Sitecore.Globalization.Translate.Text("EventImage")<br>
#Html.TextBoxFor(m => m.EventImage, new { type = "file" })
</div>
Model:
[Display(Name = "Event Image")]
public HttpPostedFileBase EventImage { get; set; }
Controller Signature:
[HttpPost]
[ValidateInput(false)]
public ActionResult AddEvent(Event model)
Catching the Image field:
if (model.EventImage != null && model.EventImage.ContentLength > 0)
{
var fileName = Path.GetFileName(model.EventImage.FileName);
var tempPath = Server.MapPath("~/Temp/uploads");
var path = Path.Combine(tempPath, fileName);
if (!Directory.Exists(tempPath))
Directory.CreateDirectory(tempPath);
model.EventImage.SaveAs(path);
Sitecore.Resources.Media.MediaCreatorOptions options = new Sitecore.Resources.Media.MediaCreatorOptions();
options.FileBased = false;
options.IncludeExtensionInItemName = false;
options.KeepExisting = false;
options.Versioned = false;
options.Destination = "/sitecore/media library/Images/" + ItemUtil.ProposeValidItemName(Path.GetFileName(path));
options.Database = Sitecore.Configuration.Factory.GetDatabase(MasterDatabase);
// Now create the file
Sitecore.Resources.Media.MediaCreator creator = new Sitecore.Resources.Media.MediaCreator();
MediaItem mediaItem = creator.CreateFromFile(path, options);
ImageField _eventImage = (ImageField)_event.Fields[EventImage];
_eventImage.MediaID = mediaItem.ID;
PublishItem(mediaItem);
}
I wanted to print header data which are dynamic and will come from controller.
So how can I display that dynamic data in header using Rotativa pdf.
My header data include Name, Address, Contact info and other additional information, which are dynamic and generated from controller side.
I have created pdf with static header as below by using html page
string header = Server.MapPath("~/Static/NewFolder/PrintHeader.html");
string footer = Server.MapPath("~/Static/NewFolder/PrintFooter.html");
string customSwitches = string.Format("--header-html \"{0}\" " +
"--header-spacing \"0\" " +
"--footer-html \"{1}\" " +
"--footer-spacing \"10\" " +
"--footer-font-size \"10\" " +
"--header-font-size \"10\" ", header, footer);
return new ViewAsPdf("SchedulePrintPdf", modelData)
{
CustomSwitches = customSwitches,
PageOrientation = Orientation.Portrait,
PageMargins = { Top = 20, Bottom = 22 },
SaveOnServerPath = filePath, FileName = Path.GetFileName(fileName)
};
This is working well with Static header.
Now I need the header text will go from this controller dynamically.
I had a similar specification once and realized it with an extra View for Printing.
There you can get additional data from the controller and include a special CSS style.
When you use bootstrap, consider that the resolution used for PDF-printing is very small, so you have to use the col-xs-* classes.
In my case the Print-View was called ResultPrint.cshtml and in the Controller I had this function:
public ActionResult GeneratePDF(int id)
{
InputPrintModel model = db.InputPrintModel.Find(id);
if (model == null)
{
return HttpNotFound();
}
try
{
return new ViewAsPdf("ResultPrint", model);
}
catch (Exception ex)
{
// Error Dialog + Logging
return View("Result", model);
}
}
which was called in my Result.cshtml like this:
#Html.ActionLink("Generate PDF", "GeneratePDF", new { id = Model.Id })
EDIT
When you look at this answer https://stackoverflow.com/a/26544977/2660864 you can see, that you can use .cshtml files in your CustomActions (I did not test this code)
public ActionResult ViewPDF()
{
string cusomtSwitches = string.Format("--print-media-type --allow {0} --footer-html {0} --footer-spacing -10",
Url.Action("Footer", "Document", new { area = ""}, "https"));
return new ViewAsPdf("MyPDF.cshtml", model)
{
FileName = "MyPDF.pdf",
CustomSwitches = customSwitches
};
}
[AllowAnonymous]
public ActionResult Footer()
{
// get custom data for view
return View(model);
}
I have integrated Wysihtml5 text editor in my page.I have define parser rules from here (https://github.com/eyecatchup/wysihtml5/blob/master/parser_rules/allow-all-html5.js). When I get data from database,code formatted,link,image,bold,color,pre tag (define from textEditor) it is not working for me.It display text like here:
Only paragraph tag works.Can any one helps me?I am using struts2 and hibernate.
Here is description attribute in hibernate:
Blog.java
#Column(name="description",columnDefinition = "LONGTEXT",length = 65535)
public String getDescription() {
return this.description;
}
public void setDescription(final String description) {
this.description = description;
}
create.jsp
<div>
<s:textarea id="wysihtml5-editor" cssStyle="height:400px" name="blog.description"
key="blog.description" placeholder="Enter Description..."/>
</div>
<script>
var editor = new wysihtml5.Editor("wysihtml5-editor", {
toolbar: "wysihtml5-editor-toolbar",
stylesheets : ["<%=request.getContextPath()%>/css/editor.css"],
cleanUp: true,
parserRules: wysihtml5ParserRules,
useLineBreaks: false
});
</script>
Thanks!
All , Say you have a code in a View like this.
<img src='#Url.Action("GetCaptchaImg")' alt='' />
and of course there is an Action named GetCaptchaImg in the controller which return a FileContentResult to View.
After open this view in FireFox. I found the Html code is
<img alt="" src="/Controllername/GetCaptchaImg" />
the src is not the real physical path . So My question is what is the real physical path of this img, How can I change the image by Ajax call to an Action? Hope you can help me . thanks.
You can make an ajax call to the actionresult and from that return the name of the image and onsuccess of your ajax call change the image
Alternatively you can do this thing, which i've implemented in my project
Make your HTML form like this
#using (Html.BeginForm("ActionResult", "Controller", FormMethod.Post, new { #id = "ImgForm", #enctype = "multipart/form-data", name = "ImgForm", target = "UploadTarget" }))
{
}
Make an iframe as target of your form
<iframe id="UploadTarget" name="UploadTarget" onload="UploadImage_Complete();" style="position: absolute;
left: -999em; top: -999em;"></iframe>
Your upload control
Then upload the Image and Show it on your form
function UploadImage() {
$("#ImgForm").submit(); //form id
}
function UploadImage_Complete() {
try {
//Check to see if this is the first load of the iFrame
if (isFirstLoad == true) {
isFirstLoad = false;
return;
}
//Reset the image form so the file won't get uploaded again
document.getElementById("ImgForm").reset();
//Grab the content of the textarea we named jsonResult . This shold be loaded into
//the hidden iFrame.
var newImg = $.parseJSON($("#UploadTarget").contents().find("#jsonResult")[0].innerHTML);
if (newImg.IsValid) {
document.getElementById("dp").src = newImg.ImagePath;
document.getElementById('profile-pic').src = newImg.ThumbnailPath;
document.getElementById("change").style.display = "block";
}
// If there was an error, display it to the user
if (newImg.IsValid == false) {
alert(newImg.Message);
return;
}
}
catch (e) {
}
}
Your Action will look like this
public WrappedJsonResult ChangeImage(HttpPostedFileBase file)
{
}
and your WrappedJsonResult class will look likes
public class WrappedJsonResult : JsonResult
{
public override void ExecuteResult(ControllerContext context)
{
context.HttpContext.Response.Write("<html><body><textarea id=\"jsonResult\" name=\"jsonResult\">");
base.ExecuteResult(context);
context.HttpContext.Response.Write("</textarea></body></html>");
context.HttpContext.Response.ContentType = "text/html";
}
}
I need to validate 3 or more input fields (required at lest one). For example I have Email, Fax, Phone.
I require at least ONE to be filled in. I need both server and client 'unobtrusive validation'. please help. I looked into "Compare" method and tried modifying it but no luck. please help.
thanks
You could write a custom attribute:
public class AtLeastOneRequiredAttribute : ValidationAttribute, IClientValidatable
{
private readonly string[] _properties;
public AtLeastOneRequiredAttribute(params string[] properties)
{
_properties = properties;
}
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
if (_properties == null || _properties.Length < 1)
{
return null;
}
foreach (var property in _properties)
{
var propertyInfo = validationContext.ObjectType.GetProperty(property);
if (propertyInfo == null)
{
return new ValidationResult(string.Format("unknown property {0}", property));
}
var propertyValue = propertyInfo.GetValue(validationContext.ObjectInstance, null);
if (propertyValue is string && !string.IsNullOrEmpty(propertyValue as string))
{
return null;
}
if (propertyValue != null)
{
return null;
}
}
return new ValidationResult(FormatErrorMessage(validationContext.DisplayName));
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var rule = new ModelClientValidationRule
{
ErrorMessage = ErrorMessage,
ValidationType = "atleastonerequired"
};
rule.ValidationParameters["properties"] = string.Join(",", _properties);
yield return rule;
}
}
which could be used to decorate one of your view model properties (the one you want to get highlighted if validation fails):
public class MyViewModel
{
[AtLeastOneRequired("Email", "Fax", "Phone", ErrorMessage = "At least Email, Fax or Phone is required")]
public string Email { get; set; }
public string Fax { get; set; }
public string Phone { get; set; }
}
and then a simple controller:
public class HomeController : Controller
{
public ActionResult Index()
{
var model = new MyViewModel();
return View(model);
}
[HttpPost]
public ActionResult Index(MyViewModel model)
{
return View(model);
}
}
Rendering the following view which will take care of defining the custom client side validator adapter:
#model MyViewModel
<script src="#Url.Content("~/Scripts/jquery.validate.js")" type="text/javascript"></script>
<script src="#Url.Content("~/Scripts/jquery.validate.unobtrusive.js")" type="text/javascript"></script>
<script type="text/javascript">
jQuery.validator.unobtrusive.adapters.add(
'atleastonerequired', ['properties'], function (options) {
options.rules['atleastonerequired'] = options.params;
options.messages['atleastonerequired'] = options.message;
}
);
jQuery.validator.addMethod('atleastonerequired', function (value, element, params) {
var properties = params.properties.split(',');
var values = $.map(properties, function (property, index) {
var val = $('#' + property).val();
return val != '' ? val : null;
});
return values.length > 0;
}, '');
</script>
#using (Html.BeginForm())
{
#Html.ValidationSummary(false)
<div>
#Html.LabelFor(x => x.Email)
#Html.EditorFor(x => x.Email)
</div>
<div>
#Html.LabelFor(x => x.Fax)
#Html.EditorFor(x => x.Fax)
</div>
<div>
#Html.LabelFor(x => x.Phone)
#Html.EditorFor(x => x.Phone)
</div>
<input type="submit" value="OK" />
}
Of course the custom adapter and validator rule should be externalized into a separate javascript file to avoid mixing script with markup.
I spent more than 36 hours why the code did not work for me.. At the end , I found out that in my case , I was not supposed to use the property names in this line of code
[AtLeastOneRequired("Email", "Fax", "Phone", ErrorMessage = "At least Email, Fax or Phone is required")]
But I had to use the HTMl element Ids in place of the property names and it worked like magic.
Posting this here if it might help somebody.
Since you are using MVC 3, take a look at great video Brad Wilson had on mvcConf. There's everything you need to create client + server Unobtrusive Validation
#Darin Dimitrov 's solution is probably the standard of creating a custom validation attribute that works with unobtrusive validation. However, using custom validation attributes for unobtrusive validation have some disadvantages such as:
The custom validation attribute is only attached to one properties, so client validation will not work if there's a change event on the other two inputs.
The error message works fine with ValidationSummary, but if you want to display 1 error message for the whole group (which I think is the norm), it would be nearly impossible.
To avoid the first problem, we can add custom validation attribute to each element in the group, which will cause another problem: we have to validate all elements of the group, instead of stopping at the first invalid group element. And of course, the second problem - separate error messages for each element - still remains.
There's another way to handle client side validation of group of inputs, using groups setting in jquery validator (https://jqueryvalidation.org/validate/#groups). The only problem (and a big one) is that unobtrusive validation doesn't support jquery validation's groups by default, so we have to customize a little bit.
Although this answer is hardly "unobtrusive", in my opinion, it is worth trying to get rid of unnecessary complication of code, if your final goal is to validate a group of inputs while using Microsoft's unobtrusive validator library.
First, because groups settings of default jquery validator is not available in jquery unobtrusive validator, we have to override unobtrusive settings (ref. How can I customize the unobtrusive validation in ASP.NET MVC 3 to match my style?)
$("form").on('submit', function () {
var form = this;
var validator = $(this).data("validator");
if (validator.settings && !validator.settings.submitHandler) {
$.extend(true, validator.settings.rules, validationSettings.rules);
$.extend(true, validator.settings.groups, validationSettings.groups);
initGroups(validator);
var fnErrorReplacement = validator.settings.errorPlacement;
validator.settings.errorPlacement = function (error, element) {
validationSettings.errorPlacement(error, element, fnErrorReplacement, form);
}
validator.settings.submitHandler = formSubmitHandler;
}
});
function formSubmitHandler(form) {
form.submit();
}
After that, override unobtrusive validator's groups, rules and errorPlacement settings.
var validationSettings = {
groups: {
checkboxgroup: "Email Fax Phone"
},
rules: {
Email: {
required: function () {
return validateCheckboxGroup(["#Email", "#Fax", "#Phone"]);
}
},
Fax: {
required: function () {
return validateCheckboxGroup(["#Email", "#Fax", "#Phone"]);
}
},
Phone: {
required: function () {
return validateCheckboxGroup(["#Email", "#Fax", "#Phone"]);
}
}
}
,
errorPlacement: function (error, element, fnUnobtrusive, form) {
switch (element.attr("name")) {
case "Email":
case "Fax":
case "Phone":
onGroupError(error, "CheckBoxGroup", form);
break;
default:
fnUnobtrusive(error, element);
break;
}
}
}
function validateCheckboxGroup(names) {
var result = true;
$.each(names, function (index, value) {
if ($(value).is(":checked")) {
result = false;
}
});
return result;
}
Because unobtrusive validator does not implement groups setting of jquery validator, we need to reuse two functions from the two libraries to: (1).split group names (reusing code from jquery validator) and (2) append error element without remove 'input-validation-error' class (reusing function onError from unobtrusive library).
function initGroups(validators) {
validators.groups = {};
$.each(validators.settings.groups,
function (key, value) {
if (typeof value === "string") {
value = value.split(/\s/);
}
$.each(value,
function (index, name) {
validators.groups[name] = key;
});
});
}
function onGroupError(error, inputElementName, form) {
var container = $(form).find("[data-valmsg-for='" + inputElementName + "']"),
replaceAttrValue = container.attr("data-valmsg-replace"),
replace = replaceAttrValue ? $.parseJSON(replaceAttrValue) !== false : null;
container.removeClass("field-validation-valid").addClass("field-validation-error");
error.data("unobtrusiveContainer", container);
if (replace) {
container.empty();
error.appendTo(container);
}
else {
error.hide();
}
}
Finally, use HtmlExtensions.ValidationMessage to create error span of the checkbox group.
#Html.ValidationMessage("CheckBoxGroup", new { #class = "text-danger" })
The keeping of "input-validation-error" class is necessary, so that jquery validator will validate all 3 elements (Email, Phone, Fax) of checkbox group as a whole, instead of validating one by one. The unobtrusive validation library remove this class by default on function onError, so we have to customize this as shown in function onGroupError above.