[英]Adding images to ASP.net core
我想添加一個圖像作為模型類的一部分,並將其顯示在索引視圖上。 我有問題要么將圖像分類為byte []或iFormFile。
這就是我想要實現的目標
創建一個頁面以插入員工列表
在索引頁面中,能夠列出員工並查看他們的圖像。
這是模型。
Employee.cs
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
namespace MvcMovie.Models
{
public class Employee
{
public int ID { get; set; }
[Required]
public string FirstName { get; set; }
[Required]
public string LastName { get; set; }
[Required]
public string Nationality { get; set; }
[Required]
public string NRIC { get; set; }
[Required]
public string StaffID { get; set; }
[Required]
public int AccessRights { get; set; }
[Required]
public DateTime DOB { get; set; }
[Required(ErrorMessage = "Please Upload a Valid Image File. Only jpg format allowed")]
[DataType(DataType.Upload)]
[Display(Name = "Upload Product Image")]
[FileExtensions(Extensions = "jpg")]
public IFormFile Image { get; set; }
public string ImageName { get; set; }
}
}
這是生成錯誤的控制器代碼部分。
EmployeeController.cs
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create(Employee employee, IFormFile Image)
{
if (ModelState.IsValid)
{
if (Image != null && Image.Length > 0)
{
var file = Image;
var uploads = Path.Combine(_environment.WebRootPath, "uploads\\img\\employees");
if (file.Length > 0)
{
var fileName = ContentDispositionHeaderValue.Parse
(file.ContentDisposition).FileName.Trim('"');
System.Console.WriteLine(fileName);
using (var fileStream = new FileStream(Path.Combine(uploads, file.FileName), FileMode.Create))
{
await file.CopyToAsync(fileStream);
employee.ImageName = Path.Combine(uploads, file.FileName);
}
var imageUrl = Path.Combine(uploads + file.FileName);
}
}
_context.Add(employee);
await _context.SaveChangesAsync();
return RedirectToAction("Index");
}
else
{
var errors = ModelState.Values.SelectMany(v => v.Errors);
}
return View(employee);
}
Create.cshtml
<form asp-action="Create" enctype="multipart/form-data" asp-antiforgery="true" method="post">
<div>
...
<div class="form-group">
<label asp-for="Image" class="control-label col-md-2"></label>
<div class="col-md-10">
<input asp-for="Image" class="form-control" />
<span class="text-danger"></span>
</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>
</form>
我設法將圖像上傳到正確的文件夾中。 但是,我對語句“_context.Add(employee)”有疑問。 它說我無法添加iform文件。 我對其他領域沒有任何問題。
我嘗試將Employee.Image更改為字節數組。 但是,我很困惑如何構建我的視圖以將此信息傳遞給create函數。
像ar27111994建議的那樣,我存儲了圖像名稱和擴展名。 圖像保存在wwwroot中的某個位置。
這是改變
Employee.cs
public class Employee
{
[Key]
public int ID { get; set; }
[Required]
public string FirstName { get; set; }
[Required]
public string LastName { get; set; }
[Required]
public string Nationality { get; set; }
[Required]
public string NRIC { get; set; }
[Required]
public string StaffIdentity { get; set; }
[Required]
public int AccessRights { get; set; }
[Required]
public DateTime DOB { get; set; }
public string ImageName { get; set; }
}
create.cshtml
<div class="form-group">
<label class="col-md-2 control-label">Employee Image</label>
<div class="col-md-10">
<input class="form-control" type="file" name="pic" accept="image/*"/>
</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>
EmployeeController.cs
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Create([Bind("ID,AccessRights,DOB,FirstName,LastName,NRIC,Nationality,StaffIdentity")]Employee employee)
{
if (ModelState.IsValid)
{
var files = HttpContext.Request.Form.Files;
foreach (var Image in files)
{
if (Image != null && Image.Length > 0)
{
var file = Image;
var uploads = Path.Combine(_environment.WebRootPath, "uploads\\img\\employees");
if (file.Length > 0)
{
var fileName = ContentDispositionHeaderValue.Parse
(file.ContentDisposition).FileName.Trim('"');
System.Console.WriteLine(fileName);
using (var fileStream = new FileStream(Path.Combine(uploads, file.FileName), FileMode.Create))
{
await file.CopyToAsync(fileStream);
employee.ImageName = file.FileName;
}
}
}
}
_context.Add(employee);
await _context.SaveChangesAsync();
return RedirectToAction("Index");
}
else
{
var errors = ModelState.Values.SelectMany(v => v.Errors);
}
return View(employee);
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.