C# - Download File From Webservice - In ASP.NET Site
Feb 10, 2010
I want to push a file to the browser from a website using a webservice. I'm currently reading the file into a base64 byte array, and returning that from the webservice. This webservice is called from a website, and i'm stuck on how to push this as the original file to the browser. Ideally I would like to read the byte array into a memory stream, and then just write it to the Response stream if possible so the end user just downloads the file.
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Similar Messages:
Jan 17, 2011
I am trying to automate the creation of an excel workbook from data retrieved from a SQL server. I have successfully automated the process and the file successfully saves in a pre-determined location as a 57kb xlsx file. However, when I run the Response.TransferFile code, a file is downloaded that is 18kb in size, and when you try to open the file, it says that the file has an invalid extension. Here is the relevent code:
[Code]....
I have tried multiple content types and different ways of specifying the content type (Response.ContentType = XXX, Response.ContentType = "application/excel","vnd.ms-excel",etc). Nothing works. I can't figure out why the filesize is different even if the extension is wrong.
I can navigate to H:/test/filename and open it just fine, so the excel portion of the code is working fine. I don't understand because this code is so simple yet goes so horribly wrong.
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Jan 4, 2010
i am using amazon s3 service. now i want to show download dialog box in my asp.net application when user come on download page. i am using amazon sdk.
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Oct 13, 2010
I'm about to submit my pad file to multiple sharware sites but the pad file has to have a direct link to the download file and can't link to a download page which is what I would like to do, so I can track the traffic and get the downloader's email before allowing the download. I am running an ASP.NET site in VB. Is there a way to tell the web app to redirect to a specific aspx page when it receives a request for a specific file?
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Jun 10, 2013
I have added linkbutton inside gridview to download, below is my code..
protected void lnkDownload_Click(object sender, EventArgs e)
{
try
{
[Code].....
its giving me following error
"Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack"
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Sep 2, 2013
I need to download  a .mp3 file from a folder. during download a new blank page should open and after downloading it should close automatically.
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Mar 18, 2011
Here it goes, I've been asked here to create a WebService that will work on .NET framework 1.1 so other project can interact with it to get the job a little .dll(1.1 also) can do.
The main idea behind this is to be able to upgrade the application and the rest of the projects while being able to use this old .dll through the WebService.
Is it possible to comunicate with a WebService that works on the framework 1.1 from an ASP application working on 2.0 or higher.
Actually, what I've tried raise an error like so : The request failed with the state HTTP:401 : Access Denied.
But when I access the webservice(asmx page), it does work, the page shows all the method available. Also the project build perfectly.
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Jul 15, 2010
ve got a site running on php and I need my form to post data to an ASP.Net web service. All I have from the ASP.Net web service is a url ending in .svc and then I open up the url I get another link that I can click on which ends in .svc?wdslThis is all pretty new to me so I'm not sure where to begin, any pointers?
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May 10, 2010
I have a new asmx web service (written with .Net 3.5), I'll be accessing this service from a Silverlight 3 app, and I want to add the service to an existing asp.net web site (written with .Net 2.0). How do I go about doing that? I tried the obvious route of just copying the entire project folder to the web site, but I experienced a number of errors when trying to view the asmx page from a browser.
There's already a service on the web site, and all it has is the asmx file, the dll and a web.config in the folder, and that's where I'm at right now with me new service. It appears to instantiate just fine, but when I call a method in t, nothing happens (the AsyncCompleted events never fire).
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Mar 17, 2011
I have an existing website that I am adding a webservice (asmx) file too so that I can make client call backs to a certain function.I found this article on securing webmethods in an API [URL] a...ntication.aspx But is there a way to set the security up for the API itself instead of each individual webmethod? Kinda like have a page load method that gets called regardless of what API you are using and checks if you have a valid session.
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Mar 3, 2011
I have a production web application that uses <authentication mode="Windows"/> I have added an .asmx page with a method in it. I'd like to test making calls to it from a separate client web app. When I do this I get the error: The request failed with HTTP status 401: Access Denied What do I need to do in my client app to access this webservice?
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Dec 10, 2010
i m creating asp.net Mobile website page to download symbian .sis file to mobile ,but its not geting download properly.its working perfectly on desktop.
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Jul 26, 2010
I am downloading file from database using the following code. This code downloads an excel file from the database which has a macro attached to it when it is opened. This macro reads file name of the excel file and uses it for its computation. Everthing works file if user saves the file on his harddisk and then open if but if he directly opens the file from the dialog(by hitting 'Open' button) then file name of the opened excel file comes out be the name of the webform that has the above code and this leads to error in the macro. Is there any option through which i can control the name of the file if user directly opens the file from dialog or the option to disable or remove 'Open' button form the dialog?
[Code]....
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May 5, 2010
I am running asp storefront version 9. I am creating a website that offers audio therapy to people. I want to make it so they have an option to preview a clip of the audio (maybe 30 secs). Then also have an option to pay for the audio file then download it from the site.
I am not sure of the best way to go about this. Right now I have each product set up as a generic product calling xml package .product.simpleproduct.xml.config.(I just set it up)
Is there a way to have the two options (preview or buy) for each product right on the product page?
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Feb 12, 2010
Does anyone have links to good tutorial on how to programatically (using vb) connect to a remote site to download and save xml files to local server? Thank you very much. The remote site is using REST and queues but I do not think that should matter or?
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Apr 5, 2010
I have an asp.net that produces a Word document. I want to allow users to download the file to their local drive. I use a hyperlink to achieve this and it works fine from my development site. However, when the website is accessed from a non development machine, I am sent to the proper directory, but instead of the open/save/cancel dialog I am presented with a "Convert File" dialog. Any of the selected file types I select download unusable files. I think this has to do with office being installed on the local machine on which I am attempting the download. Is there any way I can simply download a file from a virtual file to my local drive?
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Mar 31, 2011
I would really appriciate if someone could show me example of how to use api webservice of another site and retreive content (or whatever data is returned) and publish that content localy on omy own site. Api webservice I´m planning to use has support for HTTP GET & POST and SOAP 1.1 and 1.2.
I created my site with webmatrix and razor.I tryed searching on the net but I'm having hard time finding relevant content.
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Mar 9, 2011
I'm getting an exception when trying to access an .asmx webservice within a MVC site. I've tried numerous things like updating the web reference within the console application and building another quick app to test, but can't get passed this issue. If I pull the URL out of the svc variable, I can browse to it directly.
Exception Details
System.Web.Services.Protocols.SoapException
occurred Message=Server was unable
to process request. ---> Value cannot
be null. Parameter name: uriString
Source=System.Web.Services Actor=""
Lang="" Node="" Role=""
StackTrace:
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage
message, WebResponse response, Stream
responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String
methodName, Object[] parameters)
at ClarityIntegration.SendTrackerDataToClarity()
in [REDACTED].Reference.cs:line 78
at [REDACTED].Program.Main(String[] args)
in [REDACTED].Program.cs:line 33
InnerException:
CONSOLE APP CODE
var svc = new TrackerClarityService.ClarityIntegration()
{
Url = url,
Credentials =
new System.Net.NetworkCredential("user", "pass", "domain")
};
svc.SendTrackerDataToClarity();
svc.Dispose();
The exception was coming out of the Web Service itself. There were some global variables not being initialized directly through the .asmx call that were being initialized by the application itself.
Some simple checks on variables within the Web Service and setting what needs to be set have fixed up the issue.
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Mar 3, 2010
At one point this was working, but somewhere something happened. What I am trying to do is simply download a page from our local site. I keep getting the 401 unauthorized.
I have tried NetworkCredential("user", "password", "domain")
and
CredentialCache cc = new CredentialCache();
cc.Add(new Uri("http://site/"), "Windows", new System.Net.NetworkCredential("user", "password", "domain"));
but that didnt work . We are using Windows authentication with no anonymous access.
Here is what was once working:
WebClient wc = new WebClient();
string FileName = Server.MapPath(\App_Data\rpt.htm);
wc.Credentials = CredentialCache.DefaultCredentials;
wc.DownloadFile("http://site/Report.aspx?OrderNum=7534&Type=inv&BE=1", FileName);
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Feb 1, 2010
I've recently been given the task of diagnosing and fixing an internally written asp site that is used to transfer large files internally and externally.
The user uploads a file and enters the receivers email address. The receiver can then click on the link which takes them to the retrieval section of the site.
The issue is although we currently have an upload limit of 100MB set within the web.config file "maxRequestLength=102400", when a user uploads a file of more than 60MB although the upload works and the file is copied to the server when the receiver tries to access it the page simply displays "Internet Explorer cannot display this page".
The site works fine for files that are smaller than 60MB so I don't think it's a code issue, but I can't be 100% certain.
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Oct 11, 2010
I am currently working on a document management system in ASP.NET 3.5 using the Telerik AJAX toolkit. It consists of masterpage with a title banner across the top and a RadTreeview down the left hand side for navigation through the site. The treeview uses a combination of static nodes and dynamic ones. The dynamic nodes are populated via a webservice. When a node is clicked the relevant page is navigated to, reloading the masterpage and displaying the content of the target page.
The problem comes from the fact the treeview's dynamic nodes are populated via a webservice and therefore as the user navigates through the tree to find a document the treeview behaves as you would expect. However, when you get to the bottom of a tree of dynamic nodes the navigation to the page of the navigateurl causes the relevant page to be loaded and then the treeview resets itself to a collapsed state. This means the user could be deep in a nest of documents but when they view one, the tree collapses and they have to start their navigation all over again. This limitation is not going to be acceptable from an ease of use perspective.
According to Telerik, this is the designed behaviour for performance reasons - the node only ever worries about populating the next set of nodes and therefore the treeviews state is not remembered in viewstate.
So, the meat of question is. Is the masterpage/async treeview navigation design pattern a valid one? Are there any other ways to have an ajax treeview on a masterpage, that remembers it's state when another page is navigated to? I have considered a siglepage/updatepanel/partial page rendering model but the opinions I've seen on the net infer that this is bad idea. It confuses users that expect back/forward browser behaviour to navigate through the site but in a single page world they would end up leaving the site.
I also thought that maybe using a single page container and an iframe may work but this seems to be moving away from the "standard" design pattern of using masterpages.
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Sep 6, 2010
This is my webservice code which performs constructs xml file and stores to particular destination ,Is this the correct way to store the resultant xml file ,or let me know if their are any alternate procedure to do so.
[WebService(Namespace = "[URL]")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.Web.Script.Services.ScriptService]
public class JsonWebService : System.Web.Services.WebService
{
XmlDocument xmlDoc = new XmlDocument();
public string keyword;
public JsonWebService () {
//Uncomment the following line if using designed components
//InitializeComponent();
}
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public bool GetList(string keyword1, string streetname, string lat, string lng, string radius)
{
XmlDocument xmlDoc= CreateXML( keyword1,streetname,lat,lng,radius);
//save file to application folder which will be refferd by client application
xmlDoc.Save(@"C:Documents and SettingsDesktop lockBlock3.xml");
return true;
}
I am not able to refer that xml file constructed at webservice ,from clientside applicaton this will be my code on clientside ,is this the right way to refer saved xml file
function searchLocationsNear() {var searchUrl ="[URL]"; //reference for xml file stored in application folder
GDownloadUrl(searchUrl, function(data) {
var xml = GXml.parse(data);
var markers = xml.documentElement.getElementsByTagName('marker');
map.clearOverlays();
..........................
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Nov 28, 2010
When I have a HttpHandler class in C#/ASP.NET mapped to a file extension in IIS any file with that extension fails to download/display in web browsers (it's downloaded as a 0-byte file in some browsers and nothing at all in other browsers). After removing the application mapping for the HttpHandler in IIS so it doesn't call the IHttpHandler class in C#, the web browser downloads the file successfully.
This was tested with an IHttpHandler class in C# that has an empty ProcessRequest method.
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Nov 16, 2010
In our application, we allow user to upload documents which can be PDF, Doc, XLS, TXT. Uploaded documents will be saved on web server. We need to display link for each document user uploaded and when user click on that link, it should open relevant document. it is expected to have required software to open relevant documents.
To upload document, we use saveAs method of FileUpload control and it works absolutely fine.Now, how to view it?I believe, i need to copy/download file to local user machine and need to open it using Process.Start.For that i need to find user local temp directory. if i put path.GetTempPath(), it gives me web server directory and copy file there.
File.Copy(
sPath + dataReader["url"].ToString(),
Path.GetTempPath() + dataReader["url"].ToString(),
true);
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Mar 26, 2011
This below code i have used in my aspx page for file download.
Response.AppendHeader("content-disposition", "attachment; filename="" + emailAttachment.FileName + "";");
Response.ContentType = "application/octet-stream";
Response.OutputStream.Write(emailAttachment.Data, 0, emailAttachment.Data.Length);
Response.End();
This block of code display Download file Dialog for Open or Save the attached file.It's working fine in Mozila Firefox and IE8 but doesn't display Download file Dialog box in IE 7
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