I’m new to Asp .net core, I was trying to build form using CRUD opertaions.Since i’m trying to save the new data it redirecting to form action instead of homepage where my list is visible. I want my data to show on studentlist since im redirecting it to StudentList but this isnt happening. Look on the internet but couldn’t find any relevant answer to it.
Form Page
After Saving the data
```Controller
using Microsoft.AspNetCore.Mvc;
using WebAppDotNetCoreCrudNew.Models;
namespace WebAppDotNetCoreCrudNew.Controllers
{
public class StudentController : Controller
{
private readonly StudentContext _Db;
public StudentController(StudentContext Db)
{
_Db = Db;
}
public IActionResult StudentList()
{
try
{
var stdList = from a in _Db.tbl_Student
join b in _Db.tbl_Department
on a.DepID equals
b.ID into Dep
from b in Dep.DefaultIfEmpty()
select new Student
{
ID = a.ID,
Name = a.Name,
Fname=a.Fname,
Mobile=a.Mobile,
Email=a.Email,
Description=a.Description,
DepID=a.DepID,
Department=b==null?"":b.Department
};
return View(stdList);
}
catch (Exception ex)
{
return View();
}
}
public IActionResult Create()
{
loadDDL();
return View();
}
[HttpPost]
public async Task<IActionResult> AddStudent(Student obj)
{
try
{
if(ModelState.IsValid)
{
if (obj.ID == 0)
{
_Db.tbl_Student.Add(obj);
await _Db.SaveChangesAsync();
}
return RedirectToAction("StudentList");
}
return View();
}
catch (Exception ex )
{
return RedirectToAction("StudentList");
}
}
private void loadDDL()
{
try
{
List<Departments> depList = new List<Departments>();
depList = _Db.tbl_Department.ToList();
depList.Insert(0, new Departments { ID = 0, Department = "Please Select" });
ViewBag.DepList = depList;
}
catch (Exception ex)
{
}
}
}
}@model WebAppDotNetCoreCrudNew.Models.Student
@{
ViewData["Title"] = "Create";
}
<h1>Create</h1>
<hr />
<div class="row">
<div class="col-md-4">
<form asp-action="AddStudent">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
<input type="hidden" asp-for="ID" />
<label asp-for="Name" class="control-label"></label>
<input asp-for="Name" class="form-control" />
<span asp-validation-for="Name" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Fname" class="control-label"></label>
<input asp-for="Fname" class="form-control" />
<span asp-validation-for="Fname" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Email" class="control-label"></label>
<input asp-for="Email" class="form-control" />
<span asp-validation-for="Email" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Mobile" class="control-label"></label>
<input asp-for="Mobile" class="form-control" />
<span asp-validation-for="Mobile" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Department" class="control-label"></label>
<select asp-for="DepID" class="form-control" asp-items="@(new SelectList(ViewBag.DepList,"ID","Department"))">
</select>
</div>
<div class="form-group">
<label asp-for="Description" class="control-label"></label>
<input asp-for="Description" class="form-control" />
<span asp-validation-for="Description" class="text-danger"></span>
</div>
<div class="form-group">
<input type="submit" value="Save" class="btn btn-primary" />
<a asp-action="StudentList" class="btn btn-outline-success">Student List</a>
</div>
</form>
</div>
</div>
@section Scripts {
@{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}
2
Answers
Just change the redirect to return View() under the Add Student action
Problem: 1:
Have gone through your error. This is very obvious because the error clearly stated that it doesn’t find the
AddStudent viewas it’s not there.How To Resolve:
As your
student addview is named ascreateso your code should be as below:Note: You cannot write
return View()as yourstudent add viewcreated asCreateso after addingnew studentif you return justView()it will eventually encounter that error which you are currently encountering.Problem: 2:
Another problem is your
ModelState.IsValidinAddStudent(Student obj)will always befalseas you have set<input type="hidden" asp-for="ID" />in your view which doesn’t make any sense. Because inAddStudent page(that isCreatein your scenario)IDwill always be0there’s no point of set this as hidden which is setModelState.IsValidvalue as false. So your code should be as below:Create View:
Controller:
Output: