I Can't get value from list while Editing in MVC

siva nathan

9y1.1kLearn iOS Programming

name email

siva [email protected] Edit|Details|Delete

[HttpGet]

public ActionResult Edit(string name)

{

var model = new List();

Registration reg = model.FirstOrDefault(emp => emp.Name == name);

if (reg == null)

return HttpNotFound();

return View(reg);

}

while im clicking Edit link i'm getting name=null

how can i get name from this

20 Replies

Know the answer? Post it — somebody with the same question will find it here.

Ramesh Palanivel9y ago
Accepted answer
Hi Siva,

The Entity model will automattically create the relation ship for tables and we can directly bind the table to list and table to model etc...

Using entity model we can achieve everything in our applicaiton...

It reduce our code..

Note : I have changed your code 10 lines to two lines... Haaa haaa... The main reason to access the table and relationss
Rathrola Prem Kumar9y ago
My Kindly Suggestion and Possibilities for this cause,

1) may b u dnt have records on that name
2) if input parameter empty, then definetly you wont get any names
3) you have to check why input parameter is null
4) this is because, In the Edit actionlink the parameter which you are passing might be not correct, yes this is cause for null values in list....

I kindly suggest, please debugg by assuming some steps like above when you face any issue, then defnlty u will find it out and you will get cnfidence :)
siva nathan9y ago
I cant validate my mvc registration form,
i'm using custom validator for name like this
[Required(ErrorMessage = "Please enter name.")]
public string Name { get; set; }
i cant get any error message why?
siva nathan9y ago
Ramesh...,
Can You explain why we need to add ADO.net model in controller ,what is the use of it?
siva nathan9y ago
i got a solution ibrahim... thank you for your support
Ibrahim Siddique9y ago
Hi Siva ,

is your problem got resolved if you want i can help you with the solution.
Please check deguging that are you getting values in controller or not.

do share the details
Ramesh Palanivel9y ago
Hi Siva,

If you have team viewer,

send your teamviewer creadentials to my mail id, [email protected]

I will try to solve your problem
siva nathan9y ago
i will send my project to you Ramesh pls solve the problem.
i want to edit my data while clicking Edit link
My controller file is Menu
model file is Registration
Ramesh Palanivel9y ago
HI Siva,

Kindly attach your project file, I will solve your problem
siva nathan9y ago
this is my url link:
http://localhost:3851/Menu/Edit/1
Ramesh Palanivel9y ago
Hi Siva,

may i know your error details, which mean your error?

Can you show the error?
siva nathan9y ago
equence contains no matching element

[HttpGet]
public ActionResult Edit(int id)
{
var model = new List();
Registration reg = model.Single(emp => emp.Id == id);
if (reg == null)
return HttpNotFound();
return View(reg);
}
siva nathan9y ago
I'm getting error using below code in view why?
@Html.ActionLink("Edit", "Edit", new { name=item.Name /* id=item.PrimaryKey */ }) |
Ramesh Palanivel9y ago
Hi Siva,

@Html.ActionLink("Edit", "Edit", new { name=item.Name /* id=item.PrimaryKey */ })

Try this code Siva, this is your problem

siva nathan9y ago

public ActionResult Select()

{

string constr = ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;

using (SqlConnection con = new SqlConnection(constr))

{

string query = " select * from Registration";

var model = new List();

using (SqlCommand cmd = new SqlCommand(query,con))

{

con.Open();

SqlDataReader dr = cmd.ExecuteReader();

while(dr.Read())

{

var registration = new Registration();

registration.Id=Convert.ToInt32(dr["id"].ToString());

registration.Name = dr["Name"].ToString();

registration.Email = dr["Email"].ToString();

registration.Gender = dr["Gender"].ToString();

registration.Phone = dr["Phone"].ToString();

registration.Address = dr["Address"].ToString();

model.Add(registration);

}

return View(model);

}

-----------------

@model IEnumerable

ViewBag.Title = "Select";

}

Select

@Html.ActionLink("Create New", "RegistrationForm")

@foreach (var item in Model) {

}

@Html.DisplayNameFor(model => model.Id)	@Html.DisplayNameFor(model => model.Name)	@Html.DisplayNameFor(model => model.Email)	@Html.DisplayNameFor(model => model.Gender)	@Html.DisplayNameFor(model => model.Phone)	@Html.DisplayNameFor(model => model.Address)
@Html.DisplayFor(modelItem => item.Id)	@Html.DisplayFor(modelItem => item.Name)	@Html.DisplayFor(modelItem => item.Email)	@Html.DisplayFor(modelItem => item.Gender)	@Html.DisplayFor(modelItem => item.Phone)	@Html.DisplayFor(modelItem => item.Address)	@Html.ActionLink("Edit", "Edit", new { /* id=item.PrimaryKey / }) \| @Html.ActionLink("Details", "Details", new { / id=item.PrimaryKey / }) \| @Html.ActionLink("Delete", "Delete", new { / id=item.PrimaryKey */ })

Ramesh Palanivel9y ago
Hi Siva,

Sorry for inconvenient,

I am asking code for list page, which screen shot you have send, that view code I need
siva nathan9y ago
[HttpGet]
public ActionResult Edit(int id)
{
var model = new List();
Registration reg = model.Single(emp => emp.Id == id);
if (reg == null)
return HttpNotFound();
return View(reg);
}
Ramesh Palanivel9y ago
Kindly post your List view code Siva
siva nathan9y ago
this is my view code

@model WebApplication1.Models.Registration
@{
ViewBag.Title = "Edit";
}
Edit
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()

Registration

@Html.ValidationSummary(true)

@Html.LabelFor(model => model.Name, new { @class = "control-label col-md-2" })

@Html.EditorFor(model => model.Name)
@Html.ValidationMessageFor(model => model.Name)

@Html.LabelFor(model => model.Email, new { @class = "control-label col-md-2" })

@Html.EditorFor(model => model.Email)
@Html.ValidationMessageFor(model => model.Email)

@Html.LabelFor(model => model.Gender, new { @class = "control-label col-md-2" })

@Html.EditorFor(model => model.Gender)
@Html.ValidationMessageFor(model => model.Gender)

@Html.LabelFor(model => model.Phone, new { @class = "control-label col-md-2" })

@Html.EditorFor(model => model.Phone)
@Html.ValidationMessageFor(model => model.Phone)

@Html.LabelFor(model => model.Address, new { @class = "control-label col-md-2" })

@Html.EditorFor(model => model.Address)
@Html.ValidationMessageFor(model => model.Address)

}
@Html.ActionLink("Back to List", "RegistrationForm")
Ramesh Palanivel9y ago
Hi Siva,

Kindly check your view, The issue may be occur from the following reason,

1. You are posting the ID value instead of name from view to controller while clicking the edit button

2. Kindly check passing parameter should be same in view and controller

ex: @Html.ActionLink("ActionName","Controller Name",new {name : "Ramesh"}

controller :

public ActionResult Edit(string name)
{
}
Kindly check this both , if you are facing the issue still , Kindly post your view code