Question

我无法在我的MVC应用程序中上传图片。有谁知道如何解决这个错误？

模特图片：

jsonSerialize

索引视图：

namespace HelloWorld.Models
{
    public class Image
    {
        [Required]
        [DataType(DataType.MultilineText)]
        public string ImagePath { get; set; }

        public int ImageId { get; set; }
    }
}

创建视图：

@model IEnumerable<HelloWorld.Models.Image>

@{
    ViewBag.Title = "Index";
}

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

@foreach (var item in Model) {
     <img src="@Html.DisplayFor(modelItem => item.ImagePath)">
}

创建操作：

@model HelloWorld.Models.Image
@{
    ViewBag.Title = "Create";
}

 <form method="post" action="@Url.Action("Create", "Images")">
    <div>
        <h4>Image</h4>
        <hr />

        <input type="file" name="file">
        <input type="submit" value="Upload">
    </div>
</form>

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

我认为我的问题是我的模型状态无效。因为我有RedirectToAction（＆＃34;创建＆＃34;，＆＃34;图像＆＃34;）;

Answer 1

发布文件时，您需要在表单上包含multipart / form-data enctype。

<?php
$target_dir = "admin/upload/".$_POST['tab']."/";
// $target_dir ="/domains/i310033.iris.fhict.nl/public_html/SmokeStik/admin/upload/".$_POST['tab']."/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);

// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
$check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
if($check !== false) {
    echo "File is an image - " . $check["mime"] . ".";
    $uploadOk = 1;
} else {
    echo "File is not an image.";
    $uploadOk = 0;
}
}
// Check if file already exists
if (file_exists($target_file)) {
echo "Sorry, file already exists.";
$uploadOk = 0;
}

// Check file size
if ($_FILES["fileToUpload"]["size"] > 1000000) {
echo "Sorry, your file is too large.";
$uploadOk = 0;
}

// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
$uploadOk = 0;
}

// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
if (move_uploaded_file($_FILES["fileToUpload"]["name"], $target_file)) {
    echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
} else {
    echo "Sorry, there was an error uploading your file.";
}
}

include 'connection.php';

$titel = $_POST['titel'];
$imagelink = $target_dir.$_FILES["fileToUpload"]["name"];
$omschrijving = $_POST['content'];
$prijs = $_POST['prijs'];
$tab = $_POST['tab'];

$sql = "INSERT INTO $tab (titel, imagelink, omschrijving, prijs, tab)
VALUES ('$titel', '$imagelink', '$omschrijving', '$prijs', '$tab')";

if ($conn->query($sql) === TRUE) {
echo "New record created successfully";
echo $imagelink;
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();

?>

<强>更新

为您的文件创建视图模型

<form method="post" action="@Url.Action("Create", "Images")" enctype="multipart/form-data">
    <div>
        <h4>Image</h4>
        <hr />

        <input type="file" name="file">
        <input type="submit" value="Upload">
    </div>
</form>

然后按以下步骤更新您的操作

public class FileViewModel
{
    [Required]
    public HttpPostedFileBase file { get; set; }
}

无法在ASP .NET MVC4中上传图像

1 个答案: