Wanna Upload file in a asynchronise way in .Net ? Here I create a simple demo to upload your file to the webservice.
The code below is pretty useful especially creating three-tier applications and your desktop form application is not directly connecting to database.
The code below is pretty useful especially creating three-tier applications and your desktop form application is not directly connecting to database.
public partial class FileUploader : Form
{
public FileUploader()
{
InitializeComponent();
}
private void btnBrowse_Click(object sender, EventArgs e)
{
using (OpenFileDialog dialog = new OpenFileDialog())
{
dialog.Title = "Open File";
dialog.Filter = "All Files|*.*";
dialog.FileName = "";
try
{
dialog.InitialDirectory = "C:\\Temp";
}
catch
{
// skip it
}
dialog.ShowDialog();
if (dialog.FileName == "")
{
return;
}
else
{
txtFileName.Text = dialog.FileName;
}
}
}
private void UploadFile(string filename)
{
try
{
// get the exact file name from the path
String strFile = System.IO.Path.GetFileName(filename);
// create an instance of the web service
localhost_test.GetInfo ws = new formapp.localhost_test.GetInfo();
ws.Credentials = System.Net.CredentialCache.DefaultCredentials;
// get the file information form the selected file
FileInfo fInfo = new FileInfo(filename);
// get the length of the file to see if it is possible
// to upload it (with the standard 4 MB limit)
long numBytes = fInfo.Length;
double dLen = Convert.ToDouble(fInfo.Length / 1000000);
// Default limit of 128 MB on web server
// have to change the web.config to if
// you want to allow larger uploads
if (dLen < 128)
{
// set up a file stream and binary reader for the selected file
FileStream fStream = new FileStream(filename,FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fStream);
// convert the file to a byte array
byte[] data = br.ReadBytes((int)numBytes);
br.Close();
// pass the byte array (file) and file name to the web service using asynchronise way
ws.UploadFileCompleted += new UploadFileCompletedEventHandler(this.UploadFileCompleted);
ws.UploadFileAsync(data, strFile);
fStream.Close();
fStream.Dispose();
//// pass the byte array (file) and file name to the web service using synchronise way
//string sTmp = ws.UploadFile(data, strFile);
//fStream.Close();
//fStream.Dispose();
//// this will always say OK unless an error occurs,
//// if an error occurs, the service returns the error message
//MessageBox.Show("File Upload Status: " + sTmp, "File Upload");
}
else
{
// Display message if the file was too large to upload
MessageBox.Show("The file selected exceeds the size limit for uploads.", "File Size");
}
}
catch (Exception ex)
{
// display an error message to the user
MessageBox.Show(ex.Message.ToString(), "Upload Error");
}
}
private void btnUpload_Click(object sender, EventArgs e)
{
if (txtFileName.Text != string.Empty)
{
UploadFile(txtFileName.Text);
}
else
{
MessageBox.Show("You must select a file first.", "No File Selected");
}
}
private void UploadFileCompleted(object sender, UploadFileCompletedEventArgs args)
{
//Bind returned results to the UI data grid
MessageBox.Show("File Upload Status: " + args.Result + " File Uploaded.");
}
}
