How to to render the blog data (blog description and blog type) inside the index view?

Question

User1421057020 posted

 I want to render the blog view , after table tag end and before starting BlogCreate.

student.cs

namespace DemoFFI.Models
{
    public class student
    {
        [Key]
        public int studid { get; set; }

        [Required(ErrorMessage = "please enter the first name")]
        public string firstname { get; set; }

        [Required(ErrorMessage = "please enter the last name")]
        public string lastname { get; set; }

        [Required(ErrorMessage = "please enter the user name")]
        public string username { get; set; }

        [Required(ErrorMessage = "please enter the password")]
        public string password { get; set; }

        [Required(ErrorMessage = "please enter the email")]
        public string email { get; set; }
    }

    public class blog
    {
        [Key]
        public int blogid { get; set; }

        [Required(ErrorMessage = "please enter the blogdescription")]
        public string blogdescription { get; set; }

        [Required(ErrorMessage = "please select the blog type")]
        public string blogtype { get; set; }
    }
}

HomeController.cs

        //public List<blog> getblogdata()
        //{
       //     List<blog> bloglist = new List<blog>();
       //     return bloglist;
       // }

        public ActionResult Index(student stud)
        {
            var v = dbstud.stud.ToList();

            return View(v);

        }

        public ActionResult BlogCreate()
        {
            return View();
        }

        [HttpPost]
        public ActionResult BlogCreate(blog blg)
        {
            var blogcreate =  dbstud.blog.Add(blg);

            ViewData["blogdatas"] = blg;

            dbstud.SaveChanges();
            return View(blogcreate);
        }

see debugging

index.cshtml

@model IEnumerable<DemoFFI.Models.student>

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")

</p>
<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.firstname)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.lastname)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.username)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.password)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.email)
        </th>
        <th></th>
    </tr>

    @foreach (var item in Model)
    {
        <tr>
            <td>
                @Html.DisplayFor(modelItem => item.firstname)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.lastname)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.username)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.password)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.email)
            </td>
            <td>
                @Html.ActionLink("Edit", "Edit", new { id = item.studid })
            </td>
        </tr>
    }

</table>


@{ Html.RenderAction("BlogCreate", "Home"); }

BlogCreate.cshtml

@model DemoFFI.Models.blog
@using DemoFFI.Models

@{
    ViewBag.Title = "BlogCreate";
    IEnumerable<blog> bloggs = ViewData["blogdatas"] as IEnumerable<blog>;
}

<h2>BlogCreate</h2>

@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()

    <div class="form-horizontal">
        <h4>blog</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.blogdescription, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.blogdescription, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.blogdescription, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.blogtype, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.DropDownListFor(x => x.blogtype, new List<SelectListItem>
    {
                        new SelectListItem() {Text = "public", Value="public"},
                        new SelectListItem() {Text = "private", Value="private"},
    })

                @*@Html.EditorFor(model => model.blogtype, new { htmlAttributes = new { @class = "form-control" } })*@
                @Html.ValidationMessageFor(model => model.blogtype, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}
<p><b>Blog Data</b></p>

<table>
    <tr>
        <th>blogdescription</th>
        <th>blogtype</th>
    </tr>

    @if (ViewData["blogdatas"] != null)
    {
        foreach (blog blg in bloggs)
        {
            <tr>
                <td>@blg.blogdescription</td>
                <td>@blg.blogtype</td>
            </tr>
        }
    }

    
</table>

viewdata giving the error object referance not set to an object

issue is after creating the blog then blogdescription and blogtype value not display? what I am doing wrong?

when create a new blog then filled data is not display on index page that is issue

please help?

Answer 1

User1421057020 posted

main issue is this line this line gives the null that is the reason object referance not set to an object

//issue is here bloggs gives the null that is the reason object referance not set to an object?

IEnumerable<blog> bloggs = ViewData["blogdatas"] as IEnumerable<blog>;   

how to solve this issue?

please help

Answer 2

User1686398519 posted

Hi,  raju bhai

Because "ViewData["blogdatas"]" is an object, problems will occur during type conversion, so "bloggs" is empty. You can modify your code like this.

Controller

        public ActionResult BlogCreate()
        {
            var blogall = dbstud.blog.ToList();
            ViewData["blogdatas"] = blogall;
            return View();
        }

        [HttpPost]
        public ActionResult BlogCreate(blog blg)
        {
            try
            {
                dbstud.blog.Add(blg);
                dbstud.SaveChanges();
            }
            catch(Exception e)
            {
                var q=e.Message;
            }
            var blogall = dbstud.blog.ToList();
            ViewData["blogdatas"] = blogall;
            return View();
        }

Here is the result.

 
Best Regards,

YihuiSun

Answer 3

User1421057020 posted

Thanks YihuiSun

can you give suggestion

    for example     

• when user(alex) login then create a private blog then only alex seeing the blog and again create a public blog then anyone seeing the blog when anyone login 
• wehn user(ton) login then does not displaying the alex private blog

can you give suggestion what can I do here?

Answer 4

User1686398519 posted

Hi,  raju bhai

I saw that you posted a new post about this question, I have already answered it in your new post, you can refer to it.

Best Regards,

YihuiSun