VS 2005 FileUpload - Can't Use JavaScript, Restriction Placed On By Who Work For
Aug 20, 2010
I 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.
I am using Visual Studio 2008 and SQL Server 2005 as my back-end.I saw this topic is already introduced in StackOverflow but I have different question related to this topic.I just want to directly get the file from my server/hard-disk and save it in the database.
I 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?
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'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.
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.
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 ?
I 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)
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.
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.
to allow users to download files. Our group uses a tool called SecureGateway which doesn't seem to like FTP as a protocol.
Smaller files don't seem to have a problem, but intermittently larger files (larger than 10K) will not download to the client properly. They will just abruptly end the transfer as if they are actually completed.
I use the following code:
{ System.IO. Stream iStream = null;// Buffer to read 10K bytes in chunk: byte[] buffer = new Byte[10000];// Length of the file: int length;// Total bytes to read: // string filepath = "DownloadFileName"; long dataToRead;// Identify the file to download including its path. String filepath = Request.Params["file"].ToString();// Identify the file name. string filename = System.IO.Path.GetFileName(filepath); try { // Open the file. iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,FileAccess.Read, System.IO.FileShare.Read); // Total bytes to read: dataToRead = iStream.Length; Response.ContentType = Response.AddHeader("application/octet-stream";"Content-Disposition", "attachment; filename="" + filename + """); // Read the bytes. while (dataToRead > 0) { // Verify that the client is connected. if (Response.IsClientConnected)// Read the data in buffer. { length = iStream.Read(buffer, 0, 10000); // Write the data to the current output stream. Response.OutputStream.Write(buffer, 0, length); // Flush the data to the HTML output. Response.Flush(); buffer = new Byte[10000]; dataToRead = dataToRead - length; } else { //prevent infinite loop if user disconnects dataToRead = -1; } } } { catch (Exception ex)// Trap the error, if any. { Response.Write("Error : " + ex.Message); } finally { if (iStream != null)//Close the file. iStream.Close(); } } }
I know that there is a preset size restriction that you have to override when uploading a file to the server, just wondering if someone knows of a similar issue with downloading to the client.
My Question is as follows:Using ASP.NET syntax for the RegularExpressionValidator control, how do you specify restriction of two consecutive characters, say character 'x'?
how can i restrict user to perform 'rules violating actions' like performing back button operation after logging in?
when a user logs in then unless that user presses logout button, it should not see login page again. if user presses back button after login then its current page should be reloaded.
have several aspx pages and one site.master. I defined *.js file with any javascript functions. And now I want to find ID of FileUpload control on one of this subpage.
function CheckFile() { var filePath = document.getElementById('<%= this.fileUp.ClientID %>').value;
This program in asp.net 2.0 is a Spanish/English Dictionary.
It consists of two textboxes,one button and a datalist. The datalist is bound to an acces database consisting of two columns; One Spanish and one English. When a user enters a Spanish word in textbox1 and clicks the button, the meaning of the word appears in textbox2. Now sometimes a user enters a word that is not in the database. I want, in this case, to have a javascript messagebox to popup saying “Either the word is not listed or misspelled”.
I tried several javascripts to popup in code behind but that did not work. I know that a clientside should be included but I am not able to do that.
The sub below is the one I am using to fetch the words and it is working perfect as long as I enter a word that is already in access database. The words in the rows in database are separated by hyphens so I am using a “Split” fuction which is also working perfectly.
I have a simple query on a table to calculate the sum of a field (This field is a calculated field from within SQL 2005)SELECT SUM(RunTime) AS TotaL FROM TimeSheets.It errors out with: Error Message: Operand data char type char is invalid for sum operator.If I use the MAX or MIN function, no isssues. The data in this field is numeric.
LDAP authentication required Internal users automatically authenticated, external users requires login Where do I store complex access control rights?
In the AD/LDAP or in the Application itself (asp.membership db).
Looking to build this in asp.net mvc 2 and using membership features, so best practice here i guess is that we roll our own custom provider to acomplish this...
I have file upload and Radio button list controls in the page
Requirement:
When the page load, the file upload control has to be enable = false when I click on the radio button list's Yes option then it has to be enable = true and when No option is clicked then enable = false
