C# - How To Specify Form Parameter When Using Webclient To Upload File
Nov 21, 2010As title, how to specify additional form parameters when uploading file using webclient?
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Apr 1, 2011I have an aspx website and I'd like to upload a file to it. The file is being processed later, so I need to support some extra information with it.
This is the website I have to far:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Upload.aspx.cs" Inherits="ABC.Web.Upload" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<head runat="server">
<title></title>
</head>
<body>
<form id="Form1" method="post" enctype="multipart/form-data" runat="server">
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This (and the code behind) works very well when using a browser and clicking through the form. But I want to upload the file using the WebClient from C# code. I don't have to use the WebClient. I can also modify the upload.aspx to suit me, there is no requirement that it works from a browser, but this is the only example I've got working.
Looking at fiddler (I just started using it, so I probably have missed it) I could not figure out how I would create such a request from code.
At the moment when using the WebClient I am specifying the address and the local filename. I have a breakpoint in the code behind in my website but the File1 and FileId are not set (as expected).
How do I have to modify the website and how do I have to use the WebClient to get the upload working?
EDIT: Just found out about the Request.Files, that will give me the file, but how about the other fields?
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Apr 3, 2012I've sp :
ALTER PROCEDURE dbo.FileUpload (
@Filename nvarchar(250),
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@FileId int OUTPUT
[Code] ....
Everything works fine like this but i would like use the parameter output to do this when i want named the upload file like this :
cmd.Parameters.AddWithValue("@FileName", Request.QueryString["IDP"] + p + "_" + filename);
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Apr 10, 2010I'm not sure where this should go (I don't know whether it's a database problem, or a code problem), but I think it's a code problem, so I'm posting here.
I'm working with a database that is storing images (actually, it's a modified version of the AdventureWorks database from Microsoft), and I'm creating a form that will let you upload a file. I've got a business object based on the table that I'm using (Production.ProductPhoto) and I'm using two stored procedures to either get (Production.ProductPhoto_Get) or add (Production.ProductPhoto_Add) an entry from/to the table. The image is being stored as a varbinary field in the database, and a Byte() in my business object.
The problem I'm having is that when I'm adding a new entry and uploading a file, the length of the file uploaded is correct (so I assume everything is going smoothly), and it gets passed along to my ProductPhotoProvider DAL class where I create a DbCommand and add the parameters for my stored procedure. The information is all added to the database successfully, and I'm returned the identity of the new entry as expected -- however, when I try to read this image back, it seems that the length is 1. I've put in break points and stepped through everything, and I don't know what's going on.
I think that I know my ProductPhotoProvider class is at least reading things correctly -- I can display other images from the database (that came with the database, that is) just fine. Mine just all come back with a length of 1.
I'm just hoping someone knows what the hell I'm talking about; I have a lot of programming experience, but this is my first major venture into ASP.NET. I have no idea which parts of my code are relevant, so I'll just post my Add and Lookup functions for now?!
[Code]....
My ProductPhotoProvider class is based off of an abstract class called AbstractDALProvider (which I can also provide if needed). I can provide the rest of my project, if needed, too.
Oh, and for good measure: I was told that when you used to store images in Microsoft Access, there was some sort of problem when retrieving the data and you'd have to strip the first 72 bytes of data from it, or something. I can only assume that this is not a problem here, because I have no problem displaying other photos that were not created by me.
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Mar 27, 2010I'm using SqlDataSource to update image stored in the database. Everything is working fine using the code below but I don't know how to access the Property Name to get the content type of the image. How can I have the pass the File upload's content type to the parameter @imgType?
[Code]....
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[code]....
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the code I am using to download is:
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WebClient webClient = new WebClient(); [code]...
When i deploy it on the server; and run my program, i get a message saying that download has completed successfully. But the problem is that the file is downloaded on the server machine in the filefolder (LocalFileFolder). I want it to be downloaded on the local machine. What is it that I am doing wrong?
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Updated code:
private static void GoGetIt(HttpContext context)
{
var directoryInfoOfWhereTheDirectoryFullOfFilesShouldBe = new FileInfo(......); [code]....
This was working fine, and returning the zip, otherwise if the file didn't exist returning 404. Then on the client side I could handle this:
public bool Download()
{
try
{
using (var client = new WebClient()) [code]....
But the problem now is two things.
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2) Now that a different exception is throwing on the server side instead of the file not found, it would seem I can't use this set up for the application, because back on client side, any exception is assumed to be filenotfound.]
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