本文介绍了如何通过asp.net MVC 4中的ajax请求下载文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
下面是我的代码:
ActionResult DownloadAttachment(student st)
{
var file = db.EmailAttachmentReceived.FirstOrDefault(x => x.LisaId == st.Lisaid);
byte[] fileBytes = System.IO.File.ReadAllBytes(file.Filepath);
return File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet, file.Filename);
}
这是我正在使用的脚本
$(function () {
$("#DownloadAttachment").click(function () {
$.ajax({
url: '@Url.Action("DownloadAttachment", "PostDetail")',
contentType: 'application/json; charset=utf-8',
datatype: 'json',
type: "GET",
success: function () {
alert("sucess");
}
});
});
});
如何返回上述代码以下载文件?
How to return the file for download pursing above code?
推荐答案
请尝试以Ajax成功
success: function () {
window.location = '@Url.Action("DownloadAttachment", "PostDetail")';
}
更新的答案:
public ActionResult DownloadAttachment(int studentId)
{
// Find user by passed id
// Student student = db.Students.FirstOrDefault(s => s.Id == studentId);
var file = db.EmailAttachmentReceived.FirstOrDefault(x => x.LisaId == studentId);
byte[] fileBytes = System.IO.File.ReadAllBytes(file.Filepath);
return File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet, file.Filename);
}
Ajax请求:
$(function () {
$("#DownloadAttachment").click(function () {
$.ajax(
{
url: '@Url.Action("DownloadAttachment", "PostDetail")',
contentType: 'application/json; charset=utf-8',
datatype: 'json',
data: {
studentId: 123
},
type: "GET",
success: function () {
window.location = '@Url.Action("DownloadAttachment", "PostDetail", new { studentId = 123 })';
}
});
});
});
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