问题
I get the following exception in my system.This system worked properly. But suddenly got and exception. I tried doing debugging. But I couldn't find the anything. This is about a profile picture upload. I did some removing of code and I got the error. But then I again add those codes but nothing happen. I tried some solutions in the internet but didn't work. I'm new to this work so please help me if you can. I tried removing some of the codes then I got an error saying invalid operation.
How can I fix this?
I tried to debug and find where the problem occurs, unfortunately I couldn't find where it is.But I guess the problem should be in these codes. These two codes created the exception
Code part 1
@{
var imgUrl = @Url.Content("~/Content/profile/" + Model.SID + ".png") + "?time=" + DateTime.Now.ToString();
}
<img id="user_img" src="@imgUrl" height="50" width="50" style="margin-top:2px" />
</li>
Code part 2
@if (Model.SID != null)
{
var imgUrl = @Url.Content("Content/profile/" + Model.SID + ".png") + "?time=" + DateTime.Now.ToString();
<div class="input-field col s12">
<div class="input-field col s12">
<img id="user_img" src="@imgUrl" height="1" width="1" />
</div>
<div class="mngimg">
@using (Html.BeginForm("UploadPhoto", "Profile", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<div class="input-field col s12">
<input type="file" name="file" id="files" onchange="this.form.submit()" />
</div>
}
</div>
</div>
}
@section Scripts
{
<script>
$(document).ready(function () {
$.validator.setDefaults({
errorClass: 'invalid',
validClass: "valid",
errorPlacement: function (error, element) {
$(element)
.closest("form")
.find("label[for='" + element.attr("id") + "']")
.attr('data-error', error.text());
},
submitHandler: function () {
event.preventDefault();
var SID = $("[name='SID']").val();
var fName = $("[name='fname']").val();
var lName = $("[name='lname']").val();
var dob = $("[name='dob']").val();
var email = $("[name='email']").val();
var pw = $("[name='password']").val();
var confirmPw = $("[name='confirmPassword']").val();
var phone = $("[name='phone']").val();
var address = $("[name='address']").val();
var user = {
SID: SID,
FirstName: fName,
LastName: lName,
DOB: dob,
email: email,
Password: password,
Phone: phone,
Address: address
}
//console.log(SID + " " + email + " " + password);
$.ajax({
type: 'POST',
url: 'saveChanges',
contentType: 'application/json',
data: JSON.stringify(user),
dataType: 'Json',
async: true,
success: function (data) {
if (data == true) {
Materialize.toast('Details Updated Successfully !!!', 4000, 'blue')
}
}
});
}
});
$.validator.addMethod("regx", function (value, element, regexpr) {
return regexpr.test(value);
}, "must contain more than 8 characters & at least 1 Alphabet and 1 Number");
$("#form").validate({
rules: {
SID: {
required: true,
minlength: 10,
maxlength: 10
},
fName: {
required: true,
minlength: 4,
maxlength: 20
},
lName: {
required: true,
minlength: 4,
maxlength: 20
},
dob: {
required: true,
},
email: {
required: true,
email: true
},
Phone: {
required: true,
regx: /^\d{10}$/,
minlength: 10,
maxlength: 10
},
},
messages: {
fName: {
required: true,
minlength: "Should be minimum 4 characters",
maxlength: "Should be maximum 20 characters",
},
lName: {
required: true,
minlength: "Should be minimum 4 characters",
maxlength: "Should be maximum 20 characters"
},
Phone: {
minlength: "Enter valid phone number",
maxlength: "Enter valid phone number"
}
}
});
});
</script>
}<form id="form" style="width:100%; height:auto; margin-left:1%; margin-top:1%" method="post">
@*<div class="input-field col s12 ">
<i class="material-icons prefix">account_circle</i>
<input id="img" name="img" type="image" value="" readonly="readonly" style="margin-top:5%; margin-bottom:1%">
<label for="img">Profile Picture</label>
</div>*@
<div class="input-field col s12 ">
<i class="material-icons prefix">subtitles</i>
<input id="SID" name="SID" type="text" value="@Model.SID" readonly="readonly">
<label for="SID">Student ID</label>
</div>
<div class="input-field col s12">
<i class="material-icons prefix">account_circle</i>
<input id="fname" name="fname" type="text" class="validate" value="@Model.FirstName">
<label for="fname">First Name</label>
</div>
<div class="input-field col s12">
<i class="material-icons prefix">account_circle</i>
<input id="lname" name="lname" type="text" class="validate" value="@Model.LastName">
<label for="lname">Last Name</label>
</div>
<div class="input-field col s12">
<i class="material-icons prefix">Address</i>
<input id="address" name="address" type="text" class="validate" value="@Model.Address">
<label for="lname">Address</label>
</div>
<div class="input-field col s12">
<i class="material-icons prefix">phone</i>
<input id="phone" name="phone" type="text" class="validate" value="@Model.Phone">
<label for="lname">Phone</label>
</div>
<label for="dob" style="margin-left:10%">Date of Birth</label>
<div class="input-field col s12">
<i class="material-icons prefix">D</i>
<input id="dob" name="dob" type="date" class="validate" value="@Model.DOB.Value.ToString("dd/ MM/ yyyy")"> @*@Model.DOB.Value.ToString("mm/dd/yyyy")*@
</div>
<div class="input-field col s12">
<i class="material-icons prefix">email</i>
<input id="email" name="email" type="email" class="validate" value="@Model.email">
<label for="email">Email</label>
</div>
<div class="input-field col s12">
<i class="material-icons prefix">lock_outline</i>
<input id="password" name="password" type="password" class="validate">
<label for="password">Password</label>
</div>
<div class="input-field col s12">
<i class="material-icons prefix">lock_outline</i>
<input id="confirmPassword" name="confirmPassword" type="password" class="validate" onkeyup="check()">
<label for="confirmPassword">Confirm Password</label>
<lable name="checkpassword"></lable>
</div>
<div class="input-field col s12">
<input class="btn waves-effect waves-light" id="submit" type="submit" name="action" style="width:33%; margin-left:20%; margin-bottom:4%">
</div>
@*</div>*@
</form>Controller
public ActionResult Index()
{
Session["userID"] = "IT14111884";
string sessionValue = Session["userID"].ToString();
if (Session["userID"].ToString() == null) return View("Login");
person1 = repo.GetPeronById(sessionValue);
var model = person1;
//DateTime da = (DateTime)person1.DOB;
//DateTime date2 = ;
//DateTime.ToString("dd MMM yyyy")
return View(model);
}
[HttpPost]
public JsonResult saveChanges(person person1)
{
person _person = new person();
_person.SID = person1.SID;
_person.FirstName = person1.FirstName;
_person.LastName = person1.LastName;
_person.Address = person1.Address;
_person.Phone = person1.Phone;
_person.DOB = person1.DOB;
_person.password = person1.password;
_person.email = person1.email;
//Session["_person"] = _person;
string sessionValue = Session["userID"].ToString();
bool status;
if (!ModelState.IsValid) return Json(false, JsonRequestBehavior.AllowGet);
status = repo.updatePerson(sessionValue,_person);
return Json(status, JsonRequestBehavior.AllowGet);
}
[HttpPost]
public ActionResult UploadPhoto(HttpPostedFileBase file)
{
if (file != null && file.ContentLength > 0)
{
var user = Session["userID"].ToString();
var fileExt = Path.GetExtension(file.FileName);
if (fileExt.ToLower().EndsWith(".png") || fileExt.ToLower().EndsWith(".jpg"))
{
var fileName = user + ".png";
var filePath = HostingEnvironment.MapPath("~/Content/profile/") + fileName;
var directory = new DirectoryInfo(HostingEnvironment.MapPath("~/Content/profile/"));
if (directory.Exists == false)
{
directory.Create();
}
ViewBag.FilePath = filePath.ToString();
file.SaveAs(filePath);
return RedirectToAction("Index", new { Message = ManageMessageId.PhotoUploadSuccess });
}
else
{
return RedirectToAction("Index", new { Message = ManageMessageId.FileExtensionError });
}
}
return RedirectToAction("Index", new { Message = ManageMessageId.Error });
}
public enum ManageMessageId
{
Error,
PhotoUploadSuccess,
FileExtensionError
}
Reporsitory class
public bool updatePerson(string ID,person _objPerson)
{
//_dbContext.people.Add(_objPerson);
person temp = null;
try
{
temp = (from p in _dbContext.people
where p.SID == ID
select p).SingleOrDefault();
temp.FirstName = _objPerson.FirstName;
temp.LastName = _objPerson.LastName;
temp.Address = _objPerson.Address;
temp.Phone = _objPerson.Phone;
temp.DOB = _objPerson.DOB;
temp.password = _objPerson.password;
temp.email = _objPerson.email;
//_dbContext.SaveChanges();
//Guid id = _objPerson.Person_ID;
if (_dbContext.SaveChanges() > 0)
{
return true;
}
}
catch (DbUpdateException e)
{
string msg = (e.InnerException.Message);
//Console.ReadLine();
}
return false;
}
来源：https://stackoverflow.com/questions/41120975/how-to-fix-microsoft-csharp-runtimebinder-runtimebinderexception-cannot-perform