Web Forms :: Maintain FileUpload.PostedFile.InputStream Value To Different Pages
Dec 20, 2010
I am working on FileUpload. I have sequence of forms showing in popup, In the starting form i am uploading the file and i have to get the PostedFile.InputStream at the end of the form. I am navigating the all form values until last form, but i am not able to get the PostedFile.InputStream value. Once page refreshed the fileupload control value is clearing. how can i get it until end of the form.
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Similar Messages:
Jan 21, 2010
I was wondering wich's the best way to "keep alive" the InputStream of the FileUpload Control.I would give you one example. Let's assume you have the FileUpload control in one WebForm, and you want process it in the next WebForm (after Response.Redirect).It would be great (unless for the memory) to have something similar to:
Session["PostedFile"] = this.FileUpload.PostedFile.InputStream.
Unfortunately, this results in:
System.ObjectDisposedException
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Jul 9, 2012
This is my button event code
protected void ImageButton2_Click1(object sender, ImageClickEventArgs e)
{
string data = Server.UrlDecode(Request.QueryString["BehCode3"]);
string filename = System.IO.Path.GetFileName(fup1.PostedFile.FileName);
string filename1 = System.IO.Path.GetFileName(fup2.PostedFile.FileName);
string filename2 = System.IO.Path.GetFileName(fup3.PostedFile.FileName);
[Code]...
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Aug 9, 2010
In my Application_BeginRequest I have code that gets query string value ?c=FR or ?c=US and store it in cookies.Based on query string value I have either US or FR,locale is selected from locale table.If ?c=FR then locale will be fr-FR and if it is US then locale will be en-US.My code is below.
void Application_BeginRequest(object sender, EventArgs e)
{
LocalizationInfo loc = GetLocalizationInfo();
if (Request.Cookies["Localization"] == null)
Response.Cookies.Add(new HttpCookie("Localization"));
Response.Cookies["Localization"]["Country"] = loc.Country;
CultureInfo objCI = new CultureInfo(loc.Locale);
Thread.CurrentThread.CurrentCulture = objCI;
Thread.CurrentThread.CurrentUICulture = objCI;
}
public static LocalizationInfo GetLocalizationInfo()
{
string countryCode = "";
string sLocale = "";
if (HttpContext.Current.Response.Cookies["Localization"]["Country"] != null)
countryCode = HttpContext.Current.Response.Cookies["Localization"]["Country"];
if (!string.IsNullOrEmpty(HttpContext.Current.Request.QueryString["c"]))
countryCode = HttpContext.Current.Request.QueryString["c"];
if (countryCode == "")
countryCode = "US";
sLocale = HertzRent2Buy.DataProvider.ListData.GetLocale(countryCode);
LocalizationInfo ret = new LocalizationInfo();
ret.Country = countryCode;
ret.Locale = sLocale;
return ret;
}
public struct LocalizationInfo
{
public string Country;
public string Locale;
}
Now when I run the project and in query string I set [URL] then for the very first page(home page itself) it shows me French translation,but on subsequent page,that query string parameter ?c=FR is lost and hence it shows be English translation not French translation since it does not pickup French resx file.If I manually append ?c=FR in subsequent page then it shows the French translation.Is there is way how I can make that query stringparameter available in all pages.Structure is there to hold Country and locale variables. In all pages I am calling GetLocalizationInfo() method as follow
LocalizationInfo info = some.DataProvider.Globalization.GetLocalizationInfo();
And I create instance info to pass locale and country as parameter. GetProductDetails(id,info.Country,info.locale). why my query string parameters get lost on subsequent pages.
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May 4, 2010
I'm using five FileUpload controls on a single web form. Besides allowing the user to upload a file I also am collecting user data. Problem I run into is during the server side validation if any of the user data is invalid on a post back when content it redisplayed the FileUpload controls loose the client url that was selected when browsing. How can I keep that path or set the pathing on the control so they do not have to keep rebrowsing for the files on data validation errors? Right now breaking up the two form sets user data and file upload into two pages is being frowned upon and requirments would like it to be on all one page.
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Jan 8, 2010
i am using Fileupload and 3 dropdown control in update panel, 3 dropdown will be post back on dropdown selected index change event (i.e like Country,states and city... get the value from db as per country,states and city)
THE PROBLEM IS
While postback the filename path is gone from the file upload control(as expected/ or Default property).
I am converting the file to byte array, to store in the database from file upload control.
How can i retain the value or Is there any way to solve this issue.
Is there any ajax control for file upload or any free controls which retain the value after postback also...?
Or it is possible to set the value to file upload control during postback ?
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Jul 19, 2010
we developed two forms.asp x with Dynamic Controls,First form has one Dynamic button_Open ,this button has Click event ,through button_Open_Click event we need to open second form with dynamic controls through (window.open()),window opening but forms.asp x not displaying controls and Second form overwriting on first form ,we added code for Dynamic Controls in both pages Page_PreInit event.do the better way to maintain state of control both pages?
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May 7, 2015
My <input id="FileUpload1" name="FileUpload1" type="file"> and country dropdown both are inside update panel , now on selectedindexchanged it do postback , which i am triggering in update panel to avoid page refresh .
Now the problem is when i select any image in fileupload and then select country , my selectedimage vanishes but its path stays in textbox .
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Mar 8, 2010
I have a page showing user records in GridView. Users can do paging, sorting, filtering all on the page. All records inside GridView have typical edit and delete buttons. When user click Edit button I load complete record on the next page which user can edit and save. When user save record how can I send user back to the GridView page displaying the same record which user has editing. I means if I simply use Response.Redirect and send user back the page with GridView load again with first page of the grid and user can't see the same record which user has edited after moving forward few pages in the GridView.
Also when user save record on the editing page. Why user need to press browser back button twice to go back to GridView page? I think if I can create a link or button on the editing page which can send user two pages back by playing with browser history or javascript my problem can solve.
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Apr 7, 2010
I am working on an existing project, setup by another coder. I'm having some trouble understanding how state is being maintained between pages. There is a Class library which has some helper objects. Mostly these objects are just used for there static methods and rarely instantiated or inherited.
This is an example class I'm testing with.
public sealed class Application
{
public static string Test;
}
Now when i run something like the following in the base class of my page, I would expect the result to be "1: 2:Test" all the time (note that "1" is empty), but strangly its only this way the first time it is run. Then every time afterwards its "1:Test 2:Test". Somehow its maintaining the state of the static variable between pages and being refreshed??
Response.Write("1:" + SharedLibrary.Application.Test);
SharedLibrary.Application.Test = "Test";
Response.Write(" 2:" + SharedLibrary.Application.Test);
I need to create more classes like this, but want to understand why this is occurring in the first place.
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Sep 17, 2010
i am working in creating forms based wizard application.user interface is something similar of using ASP.Net wizard control. i like to create 5,6 pages with data collection forms (each page with each section) and final confirmation page. can any one tell me better way of building it using MVC. I am not sure how to maintain state across pages ( Model binding?) .
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May 28, 2010
I have a website which contains several ajax enabled pages. I need to maintain state in each page. I have added historypoints in each page. My back button works fine as far as I am on single page. But when I visit different page and then click back button to come to original page, only the last history state for that page is loaded and all other seem to get wiped out. What I mean is, clicking back button again takes me to previous page instead of loading same page again from history point. Is there any way to maintain history points even when I visit different pages
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Aug 31, 2010
I would like to validate the .txt or .csv file that is uploaded using PostedFile.ContentType:
<asp:FileUpload ID="fileUpload" runat="server" Width="525px" />
Is "text/plain" the correct value?
if (fileUpload.PostedFile.ContentType != "text/plain") ...
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Jan 20, 2011
i have a file upload control as below:
<input id="txtLocalResource" style="width:100%" type="file" size="16" name="txtLocalResource" runat="server">
in my code when i look at txtLocalResource.PostedFile.FileName it returns only the filename, the rest of the path is missing? i am using ie8 and vs2010.
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Nov 1, 2010
Simple upload has been working for quite a while now, yet it seems to all the sudden not work (but only for specific file types). mp3 can upload, flv cannot (remember, this was all working before).After a little debugging, I discovered that a portion of my code is never being entered because I test something first:
[Code]....
I have discovered that resourceMediaFile.PostedFile is not null, resourceMediaFile.PostedFile.ContentLength is the correct size for the uploaded file, yet resourceMediaFile.PostedFile.ContentType is now null. I've literally had this work over 1,000 times with several files (including the one I'm testing with) and it consistently came back "application/flv".
What would cause ContentType to be null if the other attributes are not?
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Oct 27, 2010
I have the following code in my UpdateParameters in a ListView
<UpdateParameters>
<asp:Parameter Name="MenuThumbImage" Type="String" />
</UpdateParameters>
And I'd like to update it to the value of FileUpload1.PostedFile.FileName I have this in a variable in the aspx.vb page as myFileName How would I use that value in the UpdateParameters section?
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Dec 23, 2010
In my file upload file I am getting Web.UI.WebControls.Button does not contain a definition for HasFile, FileName, SaveAs and PostedFile.
The code I am using is:[Code]....
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Feb 24, 2011
I have the following form page (aspx)
<form id="form1" runat="server" enctype="multipart/form-data" method="post">
<forms:FormDisplay ID="UserProfileForm1" runat="server" />
</form>
The UserProfileForm1 control is a form builder that creates a form based on the profile design. When the form is posted, I am looking through the controls in the form and handling each one as needed. We there is a file upload control it shows up as a htmlinputfile control but the postedfile property is always nothing.When I look at the Request.Files collection the first file (Request.Files(0)) is the file I selected to upload. Why is this not being mapped back to the control under .postedfile?I have a control builder which uses the following code to create the control
Dim file As New HtmlInputFile
file.ID = "fil" & md.DataID & md.Name
Return file
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May 28, 2010
I have a page posting data to me via HTTP POST. What i want is write posted data into mp4 video format file. Here my code how to write that file:
string strFilePath = "D:\Video.mp4";
using (FileStream fs = new FileStream(strFilePath, FileMode.Create))
{
byte[] bytes = new byte[Request.InputStream.Length];
Request.InputStream.Read(bytes, 0, (int)Request.InputStream.Length);
fs.Write(bytes, 0, bytes.Length);
}
My problem is that i got the file, but it's corrupt when playback. Is there any problem with my stream or i missing some decode for mp4 file?
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May 21, 2010
[Code]....
My fu.PostedFile shows data in it. Each index of the array has different value in it. But arrFileByte shows all the index have 0 as their value. I've used this very code to upload files in the database before. What might be the resaon it is not working now.
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Apr 19, 2010
I am getting lot of errors for HttpRequestValidationException in my event log.
Is it possible to HTMLEncode all the inputs from override of ProcessRequest on web page. I have tried this but it gives context.Request.InputStream.CanWrite == false always.
Is there any way to HTMLEncode all the feilds when request is made?
public override void ProcessRequest(HttpContext context)
{
if (context.Request.InputStream.CanRead)
{
IEnumerator en = HttpContext.Current.Request.Form.GetEnumerator();
while (en.MoveNext())
{
//Response.Write(Server.HtmlEncode(en.Current + " = " +
//HttpContext.Current.Request.Form[(string)en.Current]));
}
long nLen = context.Request.InputStream.Length;
if (nLen > 0)
{
string strInputStream = string.Empty;
context.Request.InputStream.Position = 0;
byte[] bytes = new byte[nLen];
context.Request.InputStream.Read(bytes, 0, Convert.ToInt32(nLen));
strInputStream = Encoding.Default.GetString(bytes);
if (!string.IsNullOrEmpty(strInputStream))
{
List<string> stream = strInputStream.Split('&').ToList<string>();
Dictionary<int, string> data = new Dictionary<int, string>();
if (stream != null && stream.Count > 0)
{
int index = 0;
foreach (string str in stream)
{
if (str.Length > 3 && str.Substring(0, 3) == "txt")
{
string textBoxData = str;
string temp = Server.HtmlEncode(str);
//stream[index] = temp;
data.Add(index, temp);
index++;
}
}
if (data.Count > 0)
{
List<string> streamNew = stream;
foreach (KeyValuePair<int, string> kvp in data)
{
streamNew[kvp.Key] = kvp.Value;
}
string newStream = string.Join("", streamNew.ToArray());
byte[] bytesNew = Encoding.Default.GetBytes(newStream);
if (context.Request.InputStream.CanWrite)
{
context.Request.InputStream.Flush();
context.Request.InputStream.Position = 0;
context.Request.InputStream.Write(bytesNew, 0, bytesNew.Length);
//Request.InputStream.Close();
//Request.InputStream.Dispose();
}
}
}
}
}
}
base.ProcessRequest(context);
}
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Jun 27, 2012
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)
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Mar 19, 2010
I m using FileUpload Control , when i click the fileupload text box , Choose file window have to open.
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Mar 29, 2010
I am using an asp:upload control to upload an image and am using the postedfile property to insert the path to the database. In my form I have a dropdown with autopostback=true where the user can select a topic to populate a checkbox list of categories. During that postback, the postedfile value is being lost and after a little research I have discovered that the posted file value is not maintained in viewstate for security reasons.
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Feb 1, 2011
I have a couple methods to handle the saving of an image using Request.InputStream. I have two extensions that share the HttpContext. In one of my methods, I'm using a BinaryReader to read in the contents and do the processing. However, naturally, when disposing the BinaryReader, it closes off the InputStream property on Request. My SECOND method uses the same input stream to create a thumbnail.
Bascially, I need a way to keep the Request.InputStream property alive after disposing the reader in the first method. Is this possible? Here are my two methods. SaveImageStream() is called first, then GenerateThumbnail().
[Code]....
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