设置:
控制器包含一个方法public ActionResult SaveFile(),它返回一个FileContentResult.
什么工作:
该视图包含一个表单,它提交到此操作.结果是这个对话框:
什么不行:
该视图包含一些javascript来执行AJAX调用到表单将发布的相同的控制器操作.而不是触发上述对话框,甚至是AJAX成功函数,响应触发AJAX错误函数,XMLHttpRequest.responseText包含文件响应.
我需要做什么:
使用AJAX对文件进行请求,结果与提交表单时的结果相同.如何使AJAX请求提供提交表单的对话框?
解决方法@H_404_18@
这是一个快速的例子.这是LukLed正在调用SaveFile的概念,但是不要通过ajax返回文件内容,而是重定向到下载.
这是查看代码:
<script src="../../Scripts/jquery-1.3.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(function() {
// hide form code here
// upload to server
$('#btnUpload').click(function() {
$.ajax({
type: 'POST',dataType: 'json',url: '<%= Url.Action("SaveFile","Home") %>',success: function(fileId) {
window.location = '<%= Url.Action("DownloadFile","Home") %>?fileId=' + fileId;
},error: function() {
alert('An error occurred uploading data.');
}
});
});
});
</script>
<% using (Html.BeginForm()) { %>
<div>Field 1: <%= Html.TextBox("field1") %></div>
<div>Field 2: <%= Html.TextBox("field2") %></div>
<div>Field 3: <%= Html.TextBox("field3") %></div>
<button id="btnUpload" type="button">Upload</button>
<% } %>
这是控制器代码:
[HandleError]
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
public JsonResult SaveFile(string field1,string field2,string field3)
{
// save the data to the database or where ever
int savedFileId = 1;
// return the saved file id to the browser
return Json(savedFileId);
}
public FileContentResult DownloadFile(int fileId)
{
// load file content from db or file system
string fileContents = "field1,field2,field3";
// convert to byte array
// use a different encoding if needed
var encoding = new System.Text.ASCIIEncoding();
byte[] returnContent = encoding.GetBytes(fileContents);
return File(returnContent,"application/CSV","test.csv");
}
public ActionResult About()
{
return View();
}
}
这是查看代码:
<script src="../../Scripts/jquery-1.3.2.min.js" type="text/javascript"></script> <script type="text/javascript"> $(function() { // hide form code here // upload to server $('#btnUpload').click(function() { $.ajax({ type: 'POST',dataType: 'json',url: '<%= Url.Action("SaveFile","Home") %>',success: function(fileId) { window.location = '<%= Url.Action("DownloadFile","Home") %>?fileId=' + fileId; },error: function() { alert('An error occurred uploading data.'); } }); }); }); </script> <% using (Html.BeginForm()) { %> <div>Field 1: <%= Html.TextBox("field1") %></div> <div>Field 2: <%= Html.TextBox("field2") %></div> <div>Field 3: <%= Html.TextBox("field3") %></div> <button id="btnUpload" type="button">Upload</button> <% } %>
这是控制器代码:
[HandleError] public class HomeController : Controller { public ActionResult Index() { return View(); } public JsonResult SaveFile(string field1,string field2,string field3) { // save the data to the database or where ever int savedFileId = 1; // return the saved file id to the browser return Json(savedFileId); } public FileContentResult DownloadFile(int fileId) { // load file content from db or file system string fileContents = "field1,field2,field3"; // convert to byte array // use a different encoding if needed var encoding = new System.Text.ASCIIEncoding(); byte[] returnContent = encoding.GetBytes(fileContents); return File(returnContent,"application/CSV","test.csv"); } public ActionResult About() { return View(); } }