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so what did i do wrong with the regex that its now allowing other document types to be uploaded. I need to make sure that ONLY pdf are allowed. What can i change to the validator and if anything add to the code behind to correct this?
i do have a form. inside specific asp:textboxes are "secured" by RequiredFieldValidator and RegularExpressionValidator running. in another div-element i do have buttons, which are expected to load different pages of my website. the problem is: when i click on either of these buttons it is not working as my validation-controls are fired prior to the onclick-button-events.
View 10 RepliesMy implementation is simple. I have a public static variable in a class called EmailHelper containing my regular expression as follows:
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I then have the following web controls on my page:
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The problem is that doesn't matter what regular expression I define as the value of my static public variable bound to the <asp:RegularExpressionValidator />, I always get an error (i.e. it aways says "invalid email")...
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The above control is firing the error message -- even when a valid email address is entered. Any idea what I am doing wrong?
I have a 'City' TextBox on one of my web pages but people from many European countries sometimes prefix the city name with the postcode instead of putting it in my dedicated 'Postcode/ZIP' TextBox. I have therefore just added a new RegularExpressionValidator to this TextBox. Its purpose is to prevent the user from entering any numeric characters but allow everything else. After browsing for a suitable regex (I am not a regex expert), I found the following code that was claimed to do what I want.
ValidationExpression="^D$"
Unfortunately, the RegularExpressionValidator does not work as expected. Instead of just rejecting numeric characters it appears to reject everything! Where might I be going wrong?
Hopefully someone can give me some pointers to get this working properly.
I have a webpage which I would like the ability to upload files to be stored in a database. Here's the layout of the page:
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The update panel is configured as such:
ChildrenAsTriggers="True" EnableViewState="True" RenderMode="Block" UpdateMode="Always" Visible="True" Runat="Server"
The reason I have the update panel outside the Tabcontainer is so that when switching between tabs, the screen doesn't flicker with refreshes, etc. But as a result, I can't get the FileUpload working properly. The FileUpload1.Filename is blank, so it errors out.
Is there anyway to get this working properly? I've tried the latest AsyncFileupload within the control toolkit, but this caused all kinds of problems with my pages so that's out of the question. I tried an iFrame too, but this also didnt work properly.
protected void wbtnup_Click(object sender, EventArgs e)
View 1 RepliesOn a page we have Fileupload control. It's not inside UpdatePanel. We use it to display pictures uploaded by user. Everything works fine until we save the state (button click causes postback). User adds picture and then click save. After that if we pick the file and try to upload it on server then PostedFile equals null. I know that FileUpload doesn't save it's file inside ViewState due to security reasons, but all we want to be able to use again FileUpload to upload further files after postback and so far it's impossible.
View 8 Replies I have a web app that allows users to upload images. Last week, all was well. This week, it appears the code is breaking. Here is the code:
Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpload.Click
If FileUploadControl.HasFile Then
Dim month As String = ddlMonth5.SelectedValue
Dim year As String = ddlYear7.SelectedValue
' Dim whatis As String = FileUploadControl.PostedFile.ContentType
Try
If (FileUploadControl.PostedFile.ContentType = "image/jpeg") Or (FileUploadControl.PostedFile.ContentType = "image/pjpeg") Or (FileUploadControl.PostedFile.ContentType = "image/gif") Or (FileUploadControl.PostedFile.ContentType = "image/x-png")
Then
Dim fs = New FileStream(FileUploadControl.PostedFile.FileName, FileMode.Open, FileAccess.Read)
'save file with new size
Using image As System.Drawing.Image = System.Drawing.Image.FromStream(fs)
Using bitmap As New Bitmap(image)
bitmap.Save("C:WebsitesimagesCusRespData.jpg", image.RawFormat)
bitmap.Save("C:Websitesimages" & month & year & "CusRespData.jpg", image.RawFormat)
End Using
End Using
StatusLabel.Text = "Upload status: File uploaded!"
fs.Close()
fs = Nothing
Else
StatusLabel.Text = "Upload status: Only .jpg,.jpeg,.gif and .png files are accepted!"
End If
Catch ex As Exception
StatusLabel.Text = "Upload status: The file could not be uploaded. The following error occured: " & ex.Message
End Try
StatusLabel.Visible = True
End If
End Sub
On the development side, I see this error: The file could not be uploaded. The following error occurred: Could not find a part of the path. On the production side, this occurs: The following error occured: A generic error occurred in GDI+.
I have a site that needs the ability to upload image files. I copied this code from the Microsoft Website:
<%@ Page Language="C#" %>
<script runat="server">
protected void Button1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
try
{
FileUpload1.SaveAs("C:\Uploads\" +
FileUpload1.FileName);
Label1.Text = "File name: " +
FileUpload1.PostedFile.FileName + "<br>" +
FileUpload1.PostedFile.ContentLength + " kb<br>" +
"Content type: " +
FileUpload1.PostedFile.ContentType;
}
catch (Exception ex)
{
Label1.Text = "ERROR: " + ex.Message.ToString();
}
else
{
Label1.Text = "You have not specified a file.";
}
}
</script>..........................
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Public Sub CustomValidator1_ServerValidate(ByVal source As Object, ByVal args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles CustomValidator1.ServerValidate
' Get file name
Dim uploadAvatar As FileUpload = DirectCast(AdvertisementForm.FindControl("uploadAvatar"), FileUpload)
Dim UploadFileName As String = uploadAvatar.PostedFile.FileName
If UploadFileName = "" Then
' There is no file selected
args.IsValid = False
Else
Dim Extension As String = UploadFileName.Substring(UploadFileName.LastIndexOf(".") + 1).ToLower()
If Extension = "xls" Or Extension = "xml" Then
args.IsValid = True ' Valid file type
Else
args.IsValid = False ' Not valid file type
End If
End If
End Sub
<table>
<div>
<td><asp:FileUpload ID="uploadAvatar" runat="server" /></td>
<td><asp:LinkButton ID="BtnUpdate" runat="server" CausesValidation="True"
CommandName="Update" Text="Update" CssClass="updatebutton" OnClientClick="ValidateFileUpload();" /></td>
<asp:CustomValidator ID="CustomValidator1" runat="server"
ClientValidationFunction="ValidateFileUpload"
ErrorMessage="Please select valid .jpg or .bmp file" ></asp:CustomValidator>
<td><asp:LinkButton ID="LinkButton2" runat="server"
CausesValidation="False" CommandName="Cancel" Text="Cancel" CssClass="cancelbutton" /></td>
</tr>
</div>
</table>
I do not want to change the default settings for file upload, 4Mb is more than enough for the project I'm working on. After quite a bit of searching I found two approaches that were purported to work but neither one is preventing the "Maximum request length exceeded" error. The first approach[see ref. #1 below] performs validation with a custom validator and in code behind on the page that contains the FileUpload control. It doesn't work. The second approach [see ref #2 below] performs validation in the Application_BeginRequest event in Global.asax. The author stated that validation must be handled by this event. Quoting: "The way to get past is to use your Application_BeginRequest event to handle the problem.. This event takes place for each request to your application BEFORE the data has been completely uploaded. Here you can check for the content length of the request and then redirect to the some error page or the same page with some value in session or query string so that the page can show appropriate message to the user." Here is my code from Golbal.asax based on the above. As noted, this approach doesn't work either.
protected void Application_BeginRequest(object sender, EventArgs e)
{
const int maxFileSize = 4 * 1000000; // Slightly less than 4Mb
if (Request.ContentLength > maxFileSize)
{
Response.Redirect("~/FileUploadError.aspx");
}
}
One comment by a reader of the Global.asax approach was that the value returned by Request.Content.Length would include everything on the page, i.e. viewstate, image and text content, etc. I suppose one work-around would be to set the limit higher in web.config but validate for max. file size in code behind, but that seems kind of silly because I'm manipulating the uploaded files (images) to reduce the size anyway; storage space isn't the issue, performance is. Has anyone managed to solve this poblem?
I have a User Control that contains a System.Web.UI.WebControls.FileUpload control as well as a button to 'Submit'.
When the button is clicked code similar to the following is executed:
If FileUploadControl.HasFile Then
'Save the file and do some other stuff
End If
This code works just fine with Windows XP. However, if I run it from a Windows 7 64-bit machine using IE8 32-bit the HasFile property always returns false and nothing is saved?
ASP.Net FileUpload not working in google chrome.It shows validation error,even after choosing right file type.
Here is a code :
<asp:FileUpload ID="FU1" runat="server" />
<asp:RegularExpressionValidator
id="FileUpLoadValidator" runat="server"
ErrorMessage="Upload jpg and gif only."
ValidationExpression="^(([a-zA-Z]:)|(\{2}w+)$?)(\(w[w].*))(.jpg|.JPG|.gif|.GIF)$"
ControlToValidate="FU1">
</asp:RegularExpressionValidator>
fileupload control is inside a grid, When Ajax is not used its s working correctly, so as wen i use a Update panel, am getting a error in uploading my file to thr database.
View 4 RepliesI am facing a problem in FileUpload controls that is available inside update panel along with CalendarExtender.
Now When I click on submit button after browse a file it is returning null fileobject value in codebehind page.
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I dont know what is the reason behind of this problem, can you let me know what is the cause and probable solution for this.
I want to uplaod my images into the database.it works fine if my images are inserted into the database on postback,but when i put my FileUpload control in UpdatePanel the FileUpload.PostedFile property shows NULL.remember my scriptmanager tag is in master page.
here is the code:
UploadImage.aspx
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
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</asp:Content>
i have to use two different Ajaxfileupload controls in a page .But when i upload file through second control the second event doesnot get fired(UploadComplete) everytime first event is fired.
<asp:AjaxFileUpload ID="AjaxFileUpload1" runat="server"
OnClientUploadComplete="onClientUploadComplete"
MaximumNumberOfFiles="10"
AllowedFileTypes="jpg,jpeg" OnUploadComplete="AjaxFileUpload1_UploadComplete" />
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I have Fileupload control in my page
1-i want delete the text that is beside of fileupload button text: no file choesn
2-i want change text of file upload button( I want change Choose file text)
I m using FileUpload Control , when i click the fileupload text box , Choose file window have to open.
View 6 Repliesi am developing web application and contain modal popup extender in which update panel made and it contain file upload control but file upload control not working in it.
This is my modal popup which contain fileupload control
and my modal popup source code
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In my WebForm I hv used an accordion and this accordion is in an UpdatePanel with UpdateMode="Conditional" .
In that accrdion , in last pane i hv a fileupload - when i select a file and click upload button then always the fileupload control has no file and it returns false everytime .
I have written trigger in UpdatePanel also still it doesn't work. Without updatepanel fileupload control works properly, this problem arise after i use UpdatePanel...
<asp:UpdatePanel ID="Acc_UpdatePanel" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<div id="acc" runat="server" style="position: inherit; height: auto;">
<div class="clear">
</div>
<div id="basic-accordian" style="border-radius: 4px;">
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I have a text field where user can enter either an URL or an Email address. How can I use a RegularExpressionValidator to validate that user have entered an URL or an Email address
View 8 RepliesI am using a RegularExpressionValidator in my code as follows:
<asp:RegularExpressionValidator ID="rev1" runat="server"
ValidationExpression="[a-zA-Z0-9]{5,7}"
ControlToValidate="txtTAM5" ErrorMessage="Please enter a valid value." SetFocusOnError="True"
Display="Dynamic" ValidationGroup="vg1"></asp:RegularExpressionValidator>
I have a query on RegularExpressionValidator. Although this question already asked in various time, I just want to confirm that if I want to validate "only alphanumeric or(and) double quote, single quote, exclamation, semicolon, colon, ampersand, dot, comma, hyphen, question mark, front slash, parentheses, space of 5-40 character length" then will the regular expression be this :
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