How to upload a file in C#.net

vidyu

hai everybody,

can anyone explain me or give some idea abt uloading of a file.
thanq
vidyu

munavvar

Hi Vidyu,

Firstly put this below line in the Aspx page.

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<input id="fileUpload" type="file" name="fileUpload" runat="server">

write the below following code in the viewcode page

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        private void Button1_Click(object sender, System.EventArgs e)

        {

            string strFileName;
 
            if (File1.PostedFile != null) 

            {      

                strFileName = File1.PostedFile.FileName;

                strFileName = strFileName.Substring(strFileName.LastIndexOf("\\")+1);

                try 

                {

                    File1.PostedFile.SaveAs("c:\\upload\\"+strFileName);

                    lblMessage.Text = "Uploaded successfully: c:\\upload\\" + strFileName+"<br>";

                }

                catch (Exception err) 

                {

                    lblMessage.Text  = "Error Uploading c:\\upload\\" + strFileName+"<br>";

                }

            }

        }

This way you can upload the file to C:\Upload folder. Try out and get back to me if you still have any issues.

Munavvar

nickykln

Thanks very much for your help but unfortunatly I didn't manage to make your code work.

Find below another possible implementation that works for me and that is maybe easier.

Hope it helps,

Nico

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private void uploadFile(String p_sURL, String p_sFileName, NameValueCollection p_oParameters) 

{
 
    HttpWebRequest oRequest = (HttpWebRequest) WebRequest.Create(p_sURL);
 
    string boundary = Guid.NewGuid().ToString().Replace("-","");

    oRequest.ContentType = "multipart/form-data; boundary=" + boundary;

    oRequest.Method = "POST";
 
    MemoryStream postData = new MemoryStream();

    string newLine = "\r\n";

    StreamWriter sw = new StreamWriter(postData);
 
    // Create a part for each parameter sent in the post request
 
    foreach(string key in p_oParameters.Keys)

    {

        string sValue = p_oParameters[key];

        sw.Write("--" + boundary + newLine);

        sw.Write("Content-Disposition: form-data; name=\"{0}\"; {1}", key, newLine);

        sw.Write(newLine + sValue + newLine);

    }
 
    // Begining Part that contains the file content
 
    sw.Write("--" + boundary + newLine);

    sw.Write("Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"{2}", "file", p_sFileName, newLine);

    sw.Write("Content-Type: image/pjpeg " + newLine + newLine);

    sw.Flush();
 
    FileStream fileStream = new FileStream(p_sFileName, FileMode.Open, FileAccess.Read); 

    Console.Out.WriteLine("File = " + fileStream.Name + "length=" + fileStream.Length);
 
    byte[] buffer = new byte[1024]; 

    int bytesRead = 0; 
 
    Stream memStream = new System.IO.MemoryStream(); 
 
    while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0 ) 

    { 

        memStream.Write(buffer, 0, bytesRead); 

    } 
 
    memStream.Position = 0; 

    byte[] contents = new byte[memStream.Length]; 

    memStream.Read(contents,0,contents.Length); 

    memStream.Close(); 
 
    postData.Write(contents, 0, contents.Length);

    sw.Write(newLine);

    sw.Write("--{0}--{1}", boundary, newLine);

    sw.Flush();
 
    oRequest.ContentLength = postData.Length;

    using (Stream s = oRequest.GetRequestStream())

        postData.WriteTo(s);

    postData.Close();
 
}

Wooten26

Could this be modified to send data to a webform from a c# application? Or could I get a link to some source that will do that? (Not thru URL, but to the webforms on submit URL as if the form was filled in -- looking for a way to send larger amounts of data to a webpage than url encoding will allow, yet not large enough to require a file upload)

Thank You (and ya.. I know this is an old post.. found it googling)

-Norman

Wooten26

Nevermind, found good code class here to do it :))

himanshu1907

In aspx Page:

<tr>
<td align="center">
<asp:FileUpload ID="fileUploadBrowse" runat="server" CssClass="fileUpload" />
</td>
</tr>
<tr>
<td align="center">
<asp:Button ID="uploadButton" runat="server" CssClass="button" OnClick="UploadButton_Click"
Text="Upload" />
</td>
</tr>

In aspx.cs Page
private string Path = ConfigurationManager.AppSettings["DocumentUploadedFilePath"];
public Stream UploadedFile
{
get
{
HttpPostedFile file = fileUploadBrowse.PostedFile;
return file.InputStream;
}
}
public string ClientFilePath
{
get
{
return fileUploadBrowse.PostedFile.FileName.ToString();
}
}

public string FileName
{
get
{
HttpPostedFile file = fileUploadBrowse.PostedFile;
return System.IO.Path.GetFileName(this.ClientFilePath);
}
}

protected void UploadButton_Click(object sender, EventArgs e)
{
UploadFileToServer(this.FileName, this.UploadedFile);
}

public void UploadFileToServer(string fileName, Stream uploadedFile)
{
byte[] buffer = new byte[65000];
int bytesRead = 0;
try
{
while ((bytesRead = uploadedFile.Read(buffer, 0, 65000)) > 0)
{
this.AppendFileToServer(fileName, buffer, 0, bytesRead);
}
}
catch (Exception ex)
{
throw (ex);
}

}
private void AppendFileToServer(string fileName, byte[] data, int offset, int count)
{
try
{
string fileUploadedPath = this.Path + "\\" + fileName;
using (FileStream fileStream = new FileStream(fileUploadedPath, FileMode.Append, FileAccess.Write))
{
fileStream.Write(data, offset, count);
fileStream.Close();
}
}
catch (Exception ex)
{
throw (ex);
}
}

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