前端准备：
//Download the template through "POST" request
function getTargertContainer() {
var $tagertContainer = $("#gridviewContainer");
if ($("#gridview_Import_dialog").size()) {
$tagertContainer = $("#gridview_Import_dialog").parent();
}
return $tagertContainer;
}
function downloadExcelTemplate() {
var criteria = $("#gridview").data("kendoGrid").options.temp.criteria;
criteria.GetIdCollectionOnlyAndIgnorePagination = true;
criteria.withData = true; if ($("#iframeforDownload").size()) {
$("#iframeforDownload").remove();
}
$("<iframe frameborder='1' width='0' height='0' src='about:blank' scrolling='no' id='iframeforDownload'>").appendTo("body");
var iframe = $("#iframeforDownload");
var iframeDocument = iframe[0].contentDocument || iframe[0].contentWindow.document;
var content = "<html><head><meta charset='utf-8' /></head><body><form action='/ExcelBulkEdit/DownloadTemplate' method='post'>";
for (var prop in criteria) {
if (typeof criteria[prop] == "object") {
for (var i = 0; i < criteria[prop].length; i++) {
for (var childprop in criteria[prop][i]) {
content += "<input name='" + prop + "[" + i + "]." + childprop + "' type='hidden' value='" + criteria[prop][i][childprop] + "'/>";
}
}
} else {
content += "<input name='" + prop + "' type='hidden' value='" + criteria[prop] + "'/>";
}
}
content += "</form></body></html>";
if (iframe[0].contentWindow.contents) {
iframe[0].contentWindow.contents = content;
} else {
iframe[0].contentWindow.document.open();
iframe[0].contentWindow.document.write(content);
iframe[0].contentWindow.document.close();
} $(iframeDocument).find("form").submit(); var maxTimeout = 5 * 60 * 1000; //Waiting 5 minutes
var ticks = 0;
var checkTimer = setInterval(function () {
var lowerCaseCookie = "fileDownload=true".toLowerCase();
if (document.cookie.toLowerCase().indexOf(lowerCaseCookie) > -1) {
clearInterval(checkTimer); //execute specified callback
getTargertContainer().stopProgressTimer(); //remove cookie
var cookieData = "fileDownload=; path=/; expires=" + new Date(0).toUTCString() + ";";
document.cookie = cookieData;
return;
}
if (ticks * 1000 > maxTimeout) {
clearInterval(checkTimer);
}
ticks++;
}, 1000);
}
后端准备：
public partial class ExcelBulkEditController : Controller
{
[AcceptVerbs(HttpVerbs.Get | HttpVerbs.Post), FileDownload]
public void DownloadTemplate(GridQueryCriteriaModel criteria, MetaType metaType, bool withData)
...........
[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = false)]
public class FileDownloadAttribute : ActionFilterAttribute
{
public FileDownloadAttribute(string cookieName = "fileDownload", string cookiePath = "/") {
CookieName = cookieName;
CookiePath = cookiePath;
} public string CookieName { get; set; } public string CookiePath { get; set; } /// <summary>
/// If the current response is a FileResult (an MVC base class for files) then write a
/// cookie to inform jquery.fileDownload that a successful file download has occured
/// </summary>
/// <param name="filterContext"></param>
private void CheckAndHandleFileResult(ActionExecutedContext filterContext) {
var httpContext = filterContext.HttpContext;
var response = httpContext.Response; if ( filterContext.Result is EmptyResult )
//jquery.fileDownload uses this cookie to determine that a file download has completed successfully
response.AppendCookie(new HttpCookie(CookieName, "true") { Path = CookiePath });
else
//ensure that the cookie is removed in case someone did a file download without using jquery.fileDownload
if ( httpContext.Request.Cookies[CookieName] != null ) {
response.AppendCookie(new HttpCookie(CookieName, "true") { Expires = DateTime.Now.AddYears(-), Path = CookiePath });
}
} public override void OnActionExecuted(ActionExecutedContext filterContext) {
CheckAndHandleFileResult(filterContext); base.OnActionExecuted(filterContext);
}
}