我有一个MVC webapi项目，它使用jquery文件上传插件将jpg发送并转换为带有数据字段的二进制映像到我的sql server。这工作得很好。我需要帮助检索表单数据并将图像转换回jpg以显示视图中的所有表单数据。它起初是一个角度项目，但我发现上传的解决方案是jquery。我无法找到将二进制图像与数据字段一起转换的示例。任何帮助表示赞赏
Api控制器
public apiItemController(ITexasIceAdapter adapter)
{
_adapter = adapter;
}
//// GET api/<controller>
public IHttpActionResult Get()
{
var item = _adapter.GetItems();
return Ok(item);
}
// GET api/<controller>/5
public IHttpActionResult Get(int id)
{
Item item = new Item();
item = _adapter.GetItem(id);
if (item == null)
{
return NotFound();
}
return Ok(item);
}
//POST
public async Task<object> PostFile()
{
if (!Request.Content.IsMimeMultipartContent())
throw new Exception();
var provider = new MultipartMemoryStreamProvider();
var result = new { files = new List<object>() };
var item = new Item();
item.ItemName = HttpContext.Current.Request.Form["itemName"];
item.ItemDescription = HttpContext.Current.Request.Form["itemDescription"];
item.ItemCategory = HttpContext.Current.Request.Form["itemCategory"];
item.ItemPrice = HttpContext.Current.Request.Form["itemPrice"];
await Request.Content.ReadAsMultipartAsync(provider)
.ContinueWith(async (a) =>
{
foreach (var file in provider.Contents)
{
if (file.Headers.ContentLength > 1000)
{
var filename = file.Headers.ContentDisposition.FileName.Trim('\"');
var contentType = file.Headers.ContentType.ToString();
await file.ReadAsByteArrayAsync().ContinueWith(b => { item.Image = b.Result; });
}
}
}).Unwrap();
new TexasIceDataAdapter().PostNewItem(item);
return result;
}
数据适配器
public List<Item> PostNewItem(Item newItem)
{
db.Items.Add(newItem);
db.SaveChanges();
return db.Items.ToList();
}
public List<Item> GetItems()
{
List<Item> items = new List<Item>();
items = db.Items.ToList();
return items;
}
public Item GetItem(int id)
{
Item model = new Item();
model = db.Items.Where(j => j.ItemId == id)
.FirstOrDefault();
return model;
}
主控制器
app.controller('MainCtrl', function ($scope, $location, $anchorScroll, $ekathuwa, $q, $http) {
$http({
method: "GET",
url: "/api/apiItem/",
}).success(function (data, status) {
$scope.itemArray = data;
console.log(data);
});
Jquery Ui-文件上传
var url = "/api/apiItem/File",
uploadButton = $('<button/>')
.addClass('btn btn-primary')
.prop('disabled', true)
.text('Processing...')
.on('click', function () {
var $this = $(this),
data = $this.data();
$this.off('click').text('Abort').on('click', function () {
$this.remove();
data.abort();
});
data.submit().always(function () {
$this.remove();
});
});
$('#fileupload').fileupload({
url: url,
dataType: 'json',
autoUpload: true,
maxFileSize: 5000000, // 5 MB
disableImageResize: /Android(?!.*Chrome)|Opera/
.test(window.navigator.userAgent),
previewMaxWidth: 100,
previewMaxHeight: 100,
previewCrop: true
, submit: function (e, data) {
// The example input, doesn't have to be part of the upload form:
var itemName = $('#itemName');
var itemDescription = $('#itemDescription');
var itemCategory = $('#itemCategory');
var itemPrice = $('#itemPrice');
data.formData = {};
data.formData.itemName = itemName.val();
data.formData.itemDescription = itemDescription.val();
data.formData.itemCategory = itemCategory.val();
data.formData.itemPrice = itemPrice.val();
}
}).on('fileuploadadd', function (e, data) {
data.context = $('<div/>').appendTo('#files');
$.each(data.files, function (index, file) {
var node = $('<p/>')
.append($('<span/>').text(file.name));
if (!index) {
node
.append('<br>')
.append(uploadButton.clone(true).data(data));
}
node.appendTo(data.context);
});
}).on('fileuploadprocessalways', function (e, data) {
var index = data.index,
file = data.files[index],
node = $(data.context.children()[index]);
if (file.preview) {
node.prepend('<br>').prepend(file.preview);
}
if (file.error) {
node.append('<br>').append($('<span class="text-danger"/>').text(file.error));
}
if (index + 1 === data.files.length) {
data.context.find('button').text('Upload').prop('disabled', !!data.files.error);
}
}).on('fileuploadprogressall', function (e, data) {
var progress = parseInt(data.loaded / data.total * 100, 10);
$('#progress .progress-bar').css('width', progress + '%');
}).on('fileuploaddone', function (e, data) {
$.each(data.result.files, function (index, file) {
if (file.url) {
var link = $('<a>').attr('target', '_blank').prop('href', file.url);
$(data.context.children()[index]).wrap(link);
} else if (file.error) {
var error = $('<span class="text-danger"/>').text(file.error);
$(data.context.children()[index]).append('<br>').append(error);
}
});
}).on('fileuploadfail', function (e, data) {
$.each(data.files, function (index, file) {
var error = $('<span class="text-danger"/>').text('File upload failed.');
$(data.context.children()[index]).append('<br>').append(error);
});
}).bind('fileuploadalways', function (e, data) {
console.log(data);
if (data._response.textStatus === "success") {
for (var i = 0; i < data._response.jqXHR.responseJSON.files.length; i++) {
}
$('#progress .progress-bar').css('width', '0%');
}
}).prop('disabled', !$.support.fileInput)
.parent().addClass($.support.fileInput ? undefined : 'disabled');
查看
<table class="table table-hover">
<tr>
<th>Category</th>
<th>Name</th>
<th>Description</th>
<th>Price</th>
</tr>
<tr ng-repeat="item in itemArray | filter:{ItemCategory:ItemItemCategory}" style="font-size:18px;">
<td src="{{item.Image}}" class="img-responsive" ng-click="open(photo)">{{item.Image}}</td>
<td><a data-toggle="modal" data-target=".bs-example-modal-lg">{{item.Image}}</a> </td>
<td style="color: #3953a5; width: 100px;"><strong>{{item.ItemCategory}}</strong></td>
<td style="width: 100px;"><strong>{{item.ItemName}}</strong></td>
<td style="width:640px;">{{item.ItemDescription}}</td>
<td>$ {{item.ItemPrice}}</td>
</tr>
提交表单视图
<form class="form-horizontal" id="fileupload" enctype="multipart/form-data">
<fieldset>
<!-- Text input-->
<div class="form-group">
<label class="col-md-2 control-label">Name :</label>
<div class="col-md-8">
<input id="itemName" type="text" class="form-control input-md">
</div>
</div>
<!-- Textarea -->
<div class="form-group">
<label class="col-md-2 control-label">Description :</label>
<div class="col-md-8">
<input class="form-control" type="text" id="itemDescription">
</div>
</div>
<!-- Textarea -->
<div class="form-group">
<label class="col-md-2 control-label">Category :</label>
<div class="col-md-8">
<input class="form-control" type="text" id="itemCategory" />
</div>
</div>
<!-- Textarea -->
<div class="form-group">
<label class="col-md-2 control-label">Price :</label>
<div class="col-md-8">
<input class="form-control" type="text" id="itemPrice" />
</div>
</div>
<!-- Textarea -->
<div class="form-group">
<label class="col-md-2 control-label">File :</label>
<div class="col-md-8">
<input type="file" name="Image" />
</div>
</div>
<!-- Button -->
<div class="form-group">
<label class="col-md-2 control-label" for="send"></label>
<div class="col-md-8">
<button type="submit" class="btn btn-primary">Send</button>
</div>
</div>
</fieldset>
</form>
答案 0 :(得分：1)
找到解决方案
<img class="img-responsive" ng-alt="" src="{{'data:image/jpg;base64,'+item.Image}}"/>