在AjaxFileUpload UploadComplete Event之后，无论如何都要更新（Gridview或Repeater数据）。我想要做的是使用AjaxFileUpload上传多张图片，一旦文件上传，它应该将这些图片显示到GridView或Repeater控件中。
除非触发按钮点击事件，否则无法执行此操作。
任何想法???
答案 0 :(得分：3)
将隐藏按钮放在表单上，并将此函数附加到扩展程序的OnClientUploadComplete事件处理程序
<asp:Button runat="server" ID="HiddenButton" OnClick="RefreshGridView" style="display:none;" />
function uploadComplete(sender, args) {
var done = true;
for (var index = 0; index < sender._filesInQueue.length; ++index) {
if (!sender._filesInQueue[index]._isUploaded) {
return;
}
}
__doPostBack("<%= HiddenButton.UniqueID %>", "");
})
然后，在此按钮的单击上刷新GridView。
答案 1 :(得分：1)
此代码检查上传的文件，创建包含文件信息的电子邮件，通过链接向该文件所针对的人发送电子邮件。它还将所有信息存储到数据库中。在上传页面上是一个gridview，列出了已上传的所有文件。它在加载文件后更新。我想你可以从中获得所需的东西。
Partial Class upload_Default
Inherits System.Web.UI.Page
Protected Sub UploadButton2_Click(sender As Object, e As EventArgs)
Dim fileGuid As String
fileGuid = Guid.NewGuid.ToString
If AsyncFileUpload1.HasFile Then
If AsyncFileUpload1.FileContent.Length < 20971500 Then
Try
Dim fileSizeB As Integer = AsyncFileUpload1.PostedFile.ContentLength
Dim fileSize = fileSizeB / 1024
Dim filename As String = Path.GetFileName(AsyncFileUpload1.FileName)
Dim fileNameTwo As String = Trim(fileGuid) + Trim(filename)
Dim ExistPdfFilenamOPO As String
ExistPdfFilenamOPO = Server.MapPath("~/uploads/files/") & filename
If File.Exists(ExistPdfFilenamOPO) Then
Label2.Text = "File is already there"
Else
Dim saveDir As String = "\Uploads\files\"
Dim appPath As String = Request.PhysicalApplicationPath
Dim savePath As String = appPath + saveDir + _
Server.HtmlEncode(AsyncFileUpload1.FileName)
AsyncFileUpload1.SaveAs(savePath)
UploadStatusLabel2.Text = "Upload status: File uploaded."
Label2.Text = ""
' Email
Dim sr As New StreamReader(appPath & "EmailTemplates/FileUpload.htm")
Dim FName As String = TextBoxFName.Text
Dim LName As String = TextBoxLName.Text
Dim Email As String = TextBoxEmail.Text
Dim fullPath As String
fullPath = "https://website.com/uploads/default.aspx?fileGuid=" + fileGuid
Dim message As New MailMessage()
message.IsBodyHtml = True
message.From = New MailAddress("Your email")
message.[To].Add(New MailAddress(Email))
message.Subject = "The file you requested from SRTR"
message.Body = sr.ReadToEnd()
sr.Close()
message.Body = message.Body.Replace("<%FName%>", FName)
message.Body = message.Body.Replace("<%LName%>", LName)
message.Body = message.Body.Replace("<%Email%>", Email)
message.Body = message.Body.Replace("<%FileName%>", filename)
message.Body = message.Body.Replace("<%VerificationUrl%>", fullPath)
Dim client As New SmtpClient()
client.Send(message)
'Insert in to t_UploadFiles
Dim datenow As Date = System.DateTime.Now()
Dim ExDate As Date = datenow.AddDays(15)
Dim Downloaded As Boolean = False
Dim connectionString As String = ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString
Dim updateSql As String = "INSERT t_UploadFiles (FileGuid, FileName, FileSize, FName, LName, Email, UploadDate, ExDate, Downloaded) SELECT @FileGuid, @FileName, @FileSize, @FName, @LName, @Email, @UploadDate, @ExDate, @Downloaded"
Using myConnection As New SqlConnection(connectionString)
myConnection.Open()
Dim myCommand As New SqlCommand(updateSql, myConnection)
myCommand.Parameters.AddWithValue("@FileGuid", fileGuid.Trim())
myCommand.Parameters.AddWithValue("@FileName", filename.Trim())
myCommand.Parameters.AddWithValue("@FileSize", fileSize)
myCommand.Parameters.AddWithValue("@FName", FName.Trim())
myCommand.Parameters.AddWithValue("@LName", LName.Trim())
myCommand.Parameters.AddWithValue("@Email", Email)
myCommand.Parameters.AddWithValue("@UploadDate", datenow)
myCommand.Parameters.AddWithValue("@ExDate", ExDate)
myCommand.Parameters.AddWithValue("@Downloaded", Downloaded)
myCommand.ExecuteNonQuery()
myConnection.Close()
End Using
articleListXX.DataBind()
End If
Catch ex As Exception
UploadStatusLabel2.Text = "Upload status: The file could not be uploaded.<br/>The following error occured: " + ex.Message
End Try
Else
UploadStatusLabel2.Text = "File is too large."
End If
Else
UploadStatusLabel2.Text = "You did not specify a file to upload."
End If
End Sub
End Class
答案 2 :(得分：0)
好的家伙感谢您的贡献，并对不起让我的查询有点不清楚。我终于弄清楚了，但这只是因为你的想法。这是我的代码。这同样适用于gridview。主要目的是使用AjaxFileUpload控件上传图片，并在OnUploadComplete="AjaxFileUpload1_UploadComplete"事件调用上创建缩略图图像的方法。创建缩略图后，调用方法populatePic()，在javascript _doPostBack（）方法的帮助下将缩略图图像填充到转发器控件中，而无需用户触发按钮。
<script type="text/javascript">
function showUploadedPic()
{
__doPostBack('btnAdd', null);
}
</script>
<cc1:AjaxFileUpload ID="AjaxFileUpload1" runat="server" OnUploadComplete="AjaxFileUpload1_UploadComplete" ThrobberID="myThrobber" MaximumNumberOfFiles="10" AllowedFileTypes="jpg,jpeg" OnClientUploadComplete="showUploadedPic" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<asp:Repeater ID="Repeater1" runat="server">
<ItemTemplate>
<asp:Image ID="Image1" runat="server" ImageUrl="<%# Container.DataItem %>" height="100"/>
</ItemTemplate>
</asp:Repeater>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnAdd" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
代码背后
protected void btnAdd_Click(object sender, EventArgs e)
{
populatePic();
}
protected void AjaxFileUpload1_UploadComplete(object sender, AjaxControlToolkit.AjaxFileUploadEventArgs e)
{
string filePath = Server.MapPath("~/files/") + e.FileName;
AjaxFileUpload1.SaveAs(filePath);
createThumbnail();
}
答案 3 :(得分：0)
以下代码经过测试并有效。
<asp:Button runat="server" ID="HiddenButtonFileUpload"
的OnClick =＆＃34; RefreshGridView＆＃34;风格=＆＃34;显示：无;＆＃34; /＆GT;
<ajax:AjaxFileUpload ID="AjaxFileUpload11" runat="server"
MaximumNumberOfFiles="3" AllowedFileTypes="txt,xls,xlsx,doc,docx,pdf"
Width="400px"
OnUploadComplete="OnUploadComplete"
OnClientUploadStart="UploadStart" OnClientUploadCompleteAll="UploadComplete"
ClearFileListAfterUpload="true" />
function UploadComplete() {
unblock();
__doPostBack("<%= HiddenButtonFileUpload.UniqueID %>", "");
}
Code Behind :
protected void RefreshGridView(object sender, EventArgs e)
{
BindForm(); // refresh your gridview
}