我需要在 .net 4.5 中显示 SQL 加载的进度。目的是展示正在发生的上传的“实时”流程。以便上传信息的人可以看到上传正在运行。
Controller 方法:
private void ProgressUpload(int? SystemGeneralAnnouncementId) {
var systemGeneralAnnouncement = (SystemGeneralAnnouncementId == null) ? null : _uow.SystemGeneralAnnouncementRepository.GetById(SystemGeneralAnnouncementId.Value);
List<Status> status = new List<Status>();
if (systemGeneralAnnouncement.Statuses.Length > 0)
{
status.AddRange(systemGeneralAnnouncement.Statuses.Split(',').Select(item => (Status)Enum.Parse(typeof(Status), item)));
}
var allEmailAddresses = new List<PointOfContact>();
var EmailAddresses = new List<PointOfContact>();
//retrieve all Point of contact based upon selected statuses per each loop
var result = new List<PointOfContact>();
foreach (var item in status)
{
result = _uow.PointOfContactRepository.GetAllByStatus(item).ToList();
allEmailAddresses.AddRange(result);
}
// Retrieve the email addresses based on the who is intended to receive the email message
if (systemGeneralAnnouncement.SendToRecipients.Contains("(1) All Three Contacts"))
{
EmailAddresses = allEmailAddresses;
}
else
{
if (systemGeneralAnnouncement.SendToRecipients.Contains("(2) All first Contacts"))
{
pocEmailAddresses.AddRange(allEmailAddresses.Where(r => r.PointOfContactType == PointOfContactTypes.Primary).ToList());
}
if (systemGeneralAnnouncement.SendToRecipients.Contains("(3) All Second Contacts"))
{
pocEmailAddresses.AddRange(allEmailAddresses.Where(r => r.PointOfContactType == PointOfContactTypes.Secondary).ToList());
}
if (systemGeneralAnnouncement.SendToRecipients.Contains("(4) All third contacts"))
{
pocEmailAddresses.AddRange(allEmailAddresses.Where(r => r.PointOfContactType == PointOfContactTypes.SigningAuthority).ToList());
}
if (systemGeneralAnnouncement.SendToRecipients.Contains("(5) All fourth Contacts"))
{
pocEmailAddresses.AddRange(allEmailAddresses.Where(r => r.PointOfContactType == PointOfContactTypes.TuitionRates).ToList());
}
if (systemGeneralAnnouncement.SendToRecipients.Contains("(6) Specified Email Address"))
{
var pocs = new List<PointOfContact>();
string[] emails = systemGeneralAnnouncement.EmailAddresses.Split(',');
foreach (string email in emails)
{
var addPoc = new PointOfContact { Email = email };
User user = _uow.UserRepository.GetByEmail(email);
if (user == null)
{
add.FirstName = "Not Created Account Yet";
}
else
{
addPoc.FirstName = user.FirstName;
addPoc.LastName = user.LastName;
}
List<PointOfContact> idAssociatedToUser =
_uow.PointOfContactRepository
.GetAllPocsByEmail(email)
.ToList();
if (idAssociatedToUser.Count == 0)
{
addPoc.IDNumber = "N/A";
}
else
{
string[] idArray = idAssociatedToUser
.Select(x => x.IDNumber)
.ToArray();
addPoc.IDNumber = string.Join(",", opeidArray);
}
pocs.Add(addPoc);
}
EmailAddresses.AddRange(pocs);
}
}
// if any poc addresses were found...
if (EmailAddresses.Count > 0)
{
string emailBody = WebUtility.HtmlDecode(systemGeneralAnnouncement.EmailBody);
foreach (PointOfContact emailAddress in EmailAddresses.Where(x => x.Email != "" && x.Email != null).ToList())
{
string firstName = emailAddress.FirstName == null ? "" : emailAddress.FirstName.Trim();
string lastName = emailAddress.LastName == null ? "" : emailAddress.LastName.Trim();
string userName = firstName + " " + lastName;
//Below I Used SqlCommand vs EF because EF has AutoDetectChangesEnabled and it slows things down when adding to the context. Instead of tuning it by turning it to false or
//configure it to use AddRange, SqlCommand is the best option for speed.
保存到数据库:
SaveToDatabase(emailAddress.Email, emailBody, systemGeneralAnnouncement.Subject, UserIdentityHelper.GetUserEmailAddress + " (" + UserIdentityHelper.GetUserId + ")", systemGeneralAnnouncement.SystemGeneralAnnouncementId, userName, emailAddress.IDNumber);
LogInstitutionEmail(systemGeneralAnnouncement.Subject, emailBody, emailAddress.Email, emailAddress.IDNumber, systemGeneralAnnouncement.EmailAttachmentLocation);
}
}
}
private void LogInstitutionEmail(string subject, string emailBody, string email, string opeidNumber, string emailAttachment)
{
try
{
using (var conn = new SqlConnection(ConfigurationManager.ConnectionStrings["MasterContext"].ConnectionString))
{
conn.Open();
SqlCommand cmd;
if (string.IsNullOrEmpty(emailAttachment))
{
cmd = new SqlCommand("Insert Into Emails (Since, Subject, Email, EmailAddress, OpeidNumber, FirstReadDateTime) VALUES(@Since, @Subject, @Email, @EmailAddress, @OpeidNumber, NULL)", conn);
}
else
{
cmd = new SqlCommand("Insert Into Emails (Since, Subject, Email, EmailAddress, OpeidNumber, FirstReadDateTime, Attachment) VALUES(@Since, @Subject, @Email, @EmailAddress, @IDNumber, NULL, @Attachment)", conn);
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@Attachment", Value = emailAttachment });
}
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@Since", Value = DateTime.Now });
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@Subject", Value = subject });
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@Email", Value = emailBody });
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@EmailAddress", Value = email });
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@idNumber", Value = idNumber });
cmd.CommandType = CommandType.Text;
cmd.ExecuteNonQuery();
conn.Close();
}
}
catch (Exception ex)
{
Elmah.ErrorSignal.FromCurrentContext().Raise(ex);
}
}
private void SaveToDatabase(string emailRecipient, string emailBody, string subject, string userWhoSentIt, int systemGeneralAnnouncementId, string userName, string opeidNumber)
{
try
{
using (var conn = new SqlConnection(ConfigurationManager.ConnectionStrings["MasterContext"].ConnectionString))
{
conn.Open();
var cmd = new SqlCommand("Insert Into EmailQueue (EmailRecipients, EmailBody, EmailSubject, UserWhoSentIt, QueueDate, SystemGeneralAnnouncementId, UserName, OpeidNumber) VALUES(@EmailRecipients, @EmailBody, @EmailSubject, @UserWhoSentIt, @QueueDate, @SystemGeneralAnnouncementId, @UserName, @OpeidNumber)", conn);
cmd.CommandType = CommandType.Text;
cmd.Parameters.Add(new SqlParameter() {ParameterName = "@EmailRecipients", Value = emailRecipient });
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@EmailBody", Value = emailBody });
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@EmailSubject", Value = subject });
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@UserWhoSentIt", Value = userWhoSentIt });
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@QueueDate", Value = DateTime.Now });
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@SystemGeneralAnnouncementId", Value = systemGeneralAnnouncementId });
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@UserName", Value = userName });
cmd.Parameters.Add(new SqlParameter() { ParameterName = "@idNumber", Value = idNumber });
cmd.ExecuteNonQuery();
conn.Close();
}
}
catch (Exception ex)
{
Elmah.ErrorSignal.FromCurrentContext().Raise(ex);
}
}
调用 Post 方法的 View :
@model DODMOU.Model.Entities.SystemGeneralAnnouncement
@{
ViewBag.Title = "Send Email";
Layout = "~/Views/Shared/_AdministratorLayout.cshtml";
}
<div class="title">
<h2>Send Email</h2>
</div>
<hr />
<div class="title">
<h2>Are you sure you want to Send this Email?</h2>
</div>
<div class="row">
<div class="col-sm-offset-2 col-sm-9">
<table class="table table-striped table-hover table-bordered table-responsive">
<tr>
<th scope="row" class="col-md-1">@Html.DisplayNameFor(model => model.SendToRecipients) :</th>
<td class="col-md-8">@Html.DisplayFor(model => model.SendToRecipients)</td>
</tr>
<tr>
<th scope="row">@Html.DisplayNameFor(model => model.Subject) :</th>
<td>@Html.DisplayFor(model => model.Subject)</td>
</tr>
<tr>
<th scope="row">@Html.DisplayNameFor(model => model.EmailBody) :</th>
<td class="col-sm-8">@MvcHtmlString.Create(HttpUtility.HtmlDecode(Model.EmailBody))</td>
</tr>
<tr>
<th scope="row">@Html.DisplayNameFor(model => model.Since) :</th>
<td>@Html.DisplayFor(model => model.Since)</td>
</tr>
</table>
</div>
<div class="row col-sm-offset-2 col-sm-9 text-right">
<div class="row col-sm-offset-2 col-sm-9 text-right">
@using (Html.BeginForm("ConfirmSend", "SystemGeneralAnnouncement", FormMethod.Post))
{
@Html.AntiForgeryToken()
@Html.HiddenFor(model => model.SystemGeneralAnnouncementId)
<div class="form-actions no-color">
<input type="submit" value="Send" class="btn btn-primary" /> |
@Html.ActionLink("Back to List", "Index")
</div>
}
</div>
</div>
</div>
接收上传信息的 View :
<div class="col-xs-12" style="text-align: center">
<p>
<div class="alert alert-success Loading">
<h2 class="title">General Announcement is Loading...</h2>
<br />
</div>
The selected general announcements are being uploaded...<br />
<div class="progress"> <div class="progress-bar" role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100" style="width: 0%;"></div> </div>
@Html.ActionLink("Return to the System General Announcement page.", "Index", "SystemGeneralAnnouncement")
</p>
<div id="success" style="display:none">
<div class="alert alert-success">
<h2 class="title">General Announcement Successfully Generated!</h2>
</div>
The selected general announcement has been successfully generated and will begin sending to the appropriate recipients within the next few minutes.<br />
@Html.ActionLink("Return to the System General Announcement page.", "Index", "SystemGeneralAnnouncement")
</div>
</div>
@section scripts{
<script>
$.ajax({
type: 'POST',
url: "ProgressUpload, systemGeneralAnnouncement",
data: {},
success: function (data) {
$(".Loading").hide();
$("#success").css("display","block");
},
xhr: function () {
var xhr = new window.XMLHttpRequest();
xhr.upload.addEventListener("progress", function (evt) {
if (evt.lengthComputable) {
var percentComplete = evt.loaded / evt.total;
}
}, false);
return xhr;
},
});
</script>
}
如上所述，这里的最终目标是允许用户在上传文件时在页面上看到“实时”进度。成功返回将在 100% 后显示，让他们知道上传完成。
我的问题是，我缺少什么来公开要上传的当前值？它应该来自事件监听器，但不显示任何上传进度。
最佳答案
我建议使用 SignalR 将进度数据更新到客户端。
假设您的上传数据是 IEnumerable 类型，您需要在 foreach 循环中捕获每次更新到 DB 并使用 SignalR 将数据更新到客户端。
查看此链接: https://www.codeproject.com/Articles/1124691/SignalR-Progress-Bar-Simple-Example-Sending-Live-D
关于c# - 跟踪保存在 "live"进度条中的数据库的进度 asp.net mvc，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43194188/