我在 asp.net core 6 中使用 coppie js，但是當 sned 模型專案 blob 為空時，發送到我的控制器但發送了一些資料就可以了嗎？請幫助我，為什么不能向控制器發送更多資料？
控制器代碼：
public class ImageController : Controller
{
private IHostingEnvironment Environment;
public ImageController(IHostingEnvironment _environment)
{
Environment = _environment;
}
[HttpGet]
public IActionResult Index()
{
return View();
}
[HttpPost]
public IActionResult Save()
{
string base64 = Request.Form["imgCropped"];
byte[] bytes = Convert.FromBase64String(base64.Split(',')[1]);
string filePath = Path.Combine(this.Environment.WebRootPath, "Images", "Cropped.png");
using (FileStream stream = new FileStream(filePath, FileMode.Create))
{
stream.Write(bytes, 0, bytes.Length);
stream.Flush();
}
return RedirectToAction("Index");
}
}
看法：
@addTagHelper*, Microsoft.AspNetCore.Mvc.TagHelpers
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<form method="post" enctype="multipart/form-data" asp-controller="Image" asp-action="Save">
<input type="file" id="FileUpload1" />
<br />
<br />
<table border="0" cellpadding="0" cellspacing="5">
<tr>
<td>
<img id="Image1" src="" alt="" style="display: none" />
</td>
<td>
<canvas id="canvas" height="5" width="5"></canvas>
</td>
</tr>
</table>
<br />
<input type="button" id="btnCrop" value="Crop" style="display: none" />
<input type="submit" id="btnUpload" value="Upload" style="display: none" />
<input type="hidden" name="imgX1" id="imgX1" />
<input type="hidden" name="imgY1" id="imgY1" />
<input type="hidden" name="imgWidth" id="imgWidth" />
<input type="hidden" name="imgHeight" id="imgHeight" />
<input type="hidden" name="imgCropped" id="imgCropped" />
</form>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery-jcrop/0.9.9/js/jquery.Jcrop.min.js"></script>
<script type="text/javascript">
$(function () {
$('#FileUpload1').change(function () {
$('#Image1').hide();
var reader = new FileReader();
reader.onload = function (e) {
$('#Image1').show();
$('#Image1').attr("src", e.target.result);
$('#Image1').Jcrop({
onChange: SetCoordinates,
onSelect: SetCoordinates
});
}
reader.readAsDataURL($(this)[0].files[0]);
});
$('#btnCrop').click(function () {
var x1 = $('#imgX1').val();
var y1 = $('#imgY1').val();
var width = $('#imgWidth').val();
var height = $('#imgHeight').val();
var canvas = $("#canvas")[0];
var context = canvas.getContext('2d');
var img = new Image();
img.onload = function () {
canvas.height = height;
canvas.width = width;
context.drawImage(img, x1, y1, width, height, 0, 0, width, height);
$('#imgCropped').val(canvas.toDataURL());
$('#btnUpload').show();
};
img.src = $('#Image1').attr("src");
});
});
function SetCoordinates(c) {
$('#imgX1').val(c.x);
$('#imgY1').val(c.y);
$('#imgWidth').val(c.w);
$('#imgHeight').val(c.h);
$('#btnCrop').show();
};
</script>
</body>
</html>
結果：
轉載請註明出處，本文鏈接：https://www.uj5u.com/gongcheng/422416.html
標籤：
上一篇：相對影像URL
下一篇：如何產生執行緒以同時發布多個帖子