I'm having a problem with the FileUpload control in ASP.NET. It requires two postbacks to server in order to upload the file. In other words, after I select the file and click upload the page reloads but do nothing. Then I reselect the file and click upload then it works.
In my code I put a check for FileUpload.HasFile and it always fails (return false) on the first postback.
Following is my html designÂ
<asp:UpdatePanel ID="up1" runat="server"><ContentTemplate>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="upload" />
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>Â Â </ContentTemplate></asp:UpdatePanel>
andÂ
if (FileUpload1.PostedFile !=null) {
//my upload code here....
}
without update panel it works fine.after place all control inside update its not working. How to fix this...
I tried to use the asp.net fileupload control for uploading a picture or music file, from blackberry device to server. But, What happened is ; the file is uploaded , ie, the file is created with 0 bytes in it. That is, file is actually not uploaded. Since blackberry browser doesn't support other fileformats, the device contains only .png & .m4a fileformats in its samples. I have used these sample in blackberry for uploading. The same has occured in the case of .m4a files also... Why is it so...? One more thing... The blackberry browser which I am refering here is the blackberry browser simulator, bold 9700.
View 7 RepliesI have a FileUpload Control on the page with validation and it is working smoothly.
Later there is an important demand to have it partially updated so we enclose it with UpdatePanel.
Then problem comes up when user browse file and press upload button, no file is uploaded.
Is it we cannot do partial rendering with FileUploader ?
I am using .net 3.5 framework. I have a Tabcontainer inside that I have place asp.net fileupload control which is inside update panel. It's been known fact that fileupload control does not work under update panel unless we use Postback Triggers.
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I was able to find examples throughout the internet that more or less accomplished what I needed to be done, but now I have run into some problems. I need to be emailed the form data when the users submits it and then the user needs to be redirected to a thank you page, in this case "thanks.asp". I have been unable to get the form to redirect users to the thanks page, and in my efforts I think I might have messed the email process up as well.
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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( Â I want change Choose file text)
i have a problem with the fileupload, does not save anything
View 3 RepliesI am uploading an image using the FileUpload control. After I have uploaded the Image to the server and the image is saved there, I am trying to show this image in an ImageBox like in the code.But the image is not shown in the Imagebox. I had this problem for some time but now wonder why the Image isn´t showing in the ImageBox. I have also tried to use the Page_Load event to track the SessionVariable to show the Image but this does not work ?(The file gets uploaded and saved to the specified path anyway, that part works)
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How to get data (read file) chosen in FileUpload control without FileUpload.SaveAs Method on the server? Is it possible write it at once to some object?
View 2 RepliesI have a FileUpload control in an UpdatePanel and when user select a file, the full file path will will be stored in a hiddenfield, and during postback, i would like to assign the full file path in the hiddenfield back to the FileUpload control textbox, possible to achieve that?
View 1 Repliesi have a form which has two textboxes and a submit button.on entering data and submitting data gets stored in the database.but if i again refresh the page the same data again gets stored.How should this be prevented?
View 3 RepliesI have 4 file upload and one upload button.When i have used an update panel then file upload loses it's content.So i have used trigger with postback.But still a progress bar is not displayed?
View 3 RepliesI have a fileupload in my ASP.net as well as other fields, of which some are mandatory.
If I populate the fileupload with a file and press save, because some of the mandatory fields are missing I stop the save and show an error message. However when the screen refreshes ansd shows the error message I loose the file in fileupload. Is there a way of retaining this?
I can't use JavaScript, restriction placed on by who I work for.
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:FileUpload onchange="clickTheButton();" ID="FileUpload1" runat="server" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" />
</Triggers>
</asp:UpdatePanel>
Button 1 is outside the update panel and the javascript that gets run when a user adds a file in the upload box is this:
function clickTheButton() {
document.getElementById('<%= Button1.ClientID %>').click();
}
The problem is simple. FileUpload1.HasFile == false. I don't know why this is, but when I put it in the update panel it ceases to work.
I have seen some other threads on this. But none of them answer why this is happening, they just point to things you can download.
EDIT: Really my main reason for wanting to do this is so that I can get a ..Uploading File.. Tag to pop up while the client is uploading to the server and once it has completed, display it in a datalist. I just cant get the UpdateProgress to work.
I have a simple form that uses jQuery validation to notify the user of input errors, etc. When I add an ASP.NET CustomValidator to the form, it causes the page to postback and skip the jQuery validation. I need the form to not be submitted to the server until the client-validation is correct. Has anyone seen this before?
This is my form:
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I use a tabcontrol with 2 tabs. In the second tabpanel as seen in the code I use a Fileuploadcontrol to upload Images from a users computer.
The problem is that I need to surround the tabcontrol with an updatepanel as I dont want a fullpage postback when switching between these 2 tabpanels. In this code I have the tabcontrol inside an updatepanel but the problem is that the Fileupload controls does not seem to work inside an updatepanel.
How will I solve this problem as I dont want a fullpage postback when switching between the tabs ?
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I cannot use asyncFileUpload as it has too many restrictions which doesn't meet our requirement.
I'm able to add a updatepanel trigger to force the Button1 to perform a postback. after the file uploaded, I need to use a timer to do different tasks and return messages back to client with the timer. That is all fine.
However, when one upload is finished. I try to do it again. The FileUpload1.HasFile is "false". I don't know why. if I remove the timer, at the second time, the HasFile is "true". I think there must be something in the timer and disable the Button1's postback.
page:
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Code:
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Is there any way to use FileUpload control only for selecting a file and retrieving its path, without uploading its content?
View 5 RepliesI have one FileUpload Control on my webform. It should be validated with the following:
1.File should be "*.doc"
2.File should be more than 0 KB.
If it is satisfied with above conditions, the file should be rename with "sampledata.doc" and should be uploaded into remote server
I am writing a web part, and i need to clear the text box part of a fileupload control. Is ther any way you can do this in C# code?
View 1 RepliesI have a 2 FileUpload controls.
Once the user selects a file in the first control, I want to set the default value for the 2nd control to be the value from the first control.
For example, if it were textbox controls I would just use TextBox1.text = TextBox2.text.
How do I do this for FileUpload controls? I tried a few different properties, such as FileUpload1.FileName = FileUpload2.FileName but I get an error saying that they are Read Only.
I would like to simply have an image button on my page that would show an image that says something like "Upload File".When the user clicks the button I would like for it to automate popping up the "select file dialog" exactly like the "browse" button does on the FileUpload control now. Then if the user selects a file and click "OK" I want to do a post back where I can then initiate the upload. If the user clicks cancel from the dialog I would do nothing.So all I am trying to do her is make it so that the user does not see the text box for the file name and replace the plain old browse button with an image and do a postback if they click ok from the dialog.
View 3 RepliesI have 1button and 1 Text box in my pageÂ
i want when i click on button it do some thing like FileUpLoad control i means when click on button it open mycomputer window and we can select file and it upload file to server exactly like fileupload control How i can do it?
i have a file upload control to upload picture.i want the user can only upload picture not any other file .when i used file upload control ,user can insert word file also,this should not be done.user can only insert pictures,otherwise message should be appear,like--"please upload valid format"
View 1 Replies