So i am building a website where i want to implement a add banner form when the User can Upload his banner image as banner Profile.

And here is where the problem i raise, when i run the code, it return always as null.

Here is my controller:

[HttpPost]
        public async Task<ActionResult> AddBannerDataAsync(BannerViewModels abd)
        {
            if (ModelState.IsValid)
            {


                string uniqueFileName = null;
                if (abd.BannerImg1 != null)
                {
                    string uploadsFolder = Path.Combine(WebHostEnvironment.WebRootPath, "Images");
                    uniqueFileName = Guid.NewGuid().ToString()   "_"   abd.BannerImg1.FileName;
                    using (var fs = new FileStream(Path.Combine(uploadsFolder, uniqueFileName), FileMode.Create))
                    {
                        await abd.BannerImg1.CopyToAsync(fs);
                    }


                }
                Banner bnr = new Banner
                {
                    BannerTitle = abd.BannerTitle,
                    BannerDescription = abd.BannerDescription,
                    //BannerImg = abd.BannerImg,
                    //BannerImg = uniqueFileName,
                    BannerUrl = abd.BannerUrl,
                    BannerIndex = abd.BannerIndex
                };
                _db.Banner.Add(bnr);
                _db.SaveChanges();

                
            }
            return Redirect("addbanner");

        } 

Here is my viewmodel:

using Microsoft.AspNetCore.Http;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using SZGMC.Web.Models;

namespace SZGMC.Web.Areas.Admin.ViewModels
{
    public class BannerViewModels
    {
        public int BannerId { get; set; }
        public string BannerTitle { get; set; }
        public string BannerDescription { get; set; }
        public string BannerImg { get; set; }
        public IFormFile BannerImg1 { get; set; }
        public string BannerUrl { get; set; }
        public string BannerIndex { get; set; }
        public int? BMasterId { get; set; }
        public byte? IsDeleted { get; set; }

        public virtual BannerMaster BMaster { get; set; }
    }
}

Here is my view file:

<form asp-controller="Home" asp-action="AddBannerData" method="post" autocomplete="off">

    <div id="main-content">
        <div >
            <!-- Page header section  -->
            <div >
                <div >
                    <div >
                        <h1>Hi, Welcomeback!</h1>
                        <span>You can add banner here</span>
                    </div>
                    <div >
                        <div >
                            <div >
                                @*<a href="setting.html" >Settings</a>*@
                                <a asp-action="BannerDetails" >Banner List</a>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <div >
                <div >
                    <div >
                        <div >

                            <div >
                                <h2><strong>Enter Banner Details</strong></h2>
                            </div>
                            <br />

                            <div >
                                <div >
                                    <div >
                                        <div >
                                            <div >
                                                <span ></span>
                                            </div>
                                            <input type="text"  asp-for="BannerTitle" placeholder="Banner Title" aria-label="bannertitle" aria-describedby="basic-addon1">
                                        </div>
                                    </div>
                                </div>
                            </div>
                            <div >
                                <div >
                                    <div >
                                        <div >
                                            <div >
                                                <span ></span>
                                            </div>
                                            <input type="text"  asp-for="BannerUrl" placeholder="Banner Url" aria-label="bannerurl" aria-describedby="basic-addon1">
                                        </div>
                                    </div>
                                </div>
                            </div>
                            <div >
                                <div >
                                    <div >
                                        <label>Banner Description</label>
                                        <div >
                                            <textarea  asp-for="BannerDescription" aria-label="Banner Description" rows="6"></textarea>
                                        </div>
                                    </div>
                                </div>
                                <div >
                                    <div >
                                        <span >Drop file here or click to upload</span>
                                        <input type="file" asp-for="BannerImg1" name="BannerImg1"  accept="image/*" data-allowed-file-extensions='["jpg", "png" , "jpeg"]' required>
                                    </div>
                                </div>
                              </div>
                                <div >
                                    <div >
                                        <div >
                                            <div >
                                                <div >
                                                    <span ></span>
                                                </div>
                                                <input type="text"  asp-for="BannerIndex" placeholder="Banner Index" aria-label="bannerindex" aria-describedby="basic-addon1">
                                            </div>
                                        </div>
                                    </div>
                                    <div >
                                        <div >
                                            @Html.DropDownListFor(x => x.BMasterId, ViewBag.MasterBanner as SelectList, "Choose Banner Type", new { @class = "form-control" })
                                        </div>
                                    </div>
                                </div>

                                <div  align="center">
                                    <button type="submit" >Add Banner</button>
                                </div>
                            </div>

                        </div>
                    </div>
                </div>
            </div>
        </div>
</form>

When i try To upload the img in the browser it doesn't Throw any exception, it just doesn't Upload the image to the database and the column is NULL.

thank you in advance to everybody for any help or advice.

CodePudding user response：

you must use enctype="multipart/form-data" attribute on form tag.

<form asp-controller="Home" asp-action="AddBannerData" method="post" autocomplete="off" enctype="multipart/form-data">

    <div id="main-content">
 ....