我正在开发一个UI，允许用户在本地更新数据库，然后将其发布到服务器。当用户点击发布按钮时，应将本地文件（bk.db）上载到服务器，并将文本添加到日志文件中。它似乎按预期写入日志文件;但是，.db文件（在服务器上，而不是本地）总是以0字节结尾（基本上它没有正确复制文件）。问题可能是什么？
主要班级：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Data;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Forms;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Net;
using System.IO;
using System.Data.SQLite;
using System.Drawing;
namespace Burger_King_Database
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
private SQLiteConnection con;
private OpenFileDialog thumbDialog = new OpenFileDialog();
private OpenFileDialog fullDialog = new OpenFileDialog();
private System.Drawing.Image iconImage;
private System.Drawing.Image buildImage;
private string itemName;
private int itemLocation;
private int lto;
private ftp uploader = new ftp("host", "user", "pass");
public MainWindow()
{
InitializeComponent();
connect();
}
private void connect()
{
try
{
con = new SQLiteConnection("Data Source=Z:\\bk.db;Pooling=true;FailIfMissing=false");
con.Open();
}
catch (SQLiteException e)
{
System.Windows.MessageBox.Show("Error: " + e.Message);
}
}
public byte[] ConvertImgToArray(System.Drawing.Image image, System.Drawing.Imaging.ImageFormat format) {
byte[] result;
try {
using(MemoryStream m = new MemoryStream()) {
image.Save(m, format);
result = m.ToArray();
}
return result;
}
catch (Exception e) {
System.Windows.MessageBox.Show("Error: " + e);
}
return null;
}
private void adminWindow_Loaded(object sender, RoutedEventArgs e)
{
locationBox.Items.Add("Breakfast");
locationBox.Items.Add("Main Boards");
locationBox.Items.Add("Speciality");
thumbDialog.InitialDirectory = "c:\\";
thumbDialog.Filter = "Image Files | *.jpg";
thumbDialog.RestoreDirectory = true;
fullDialog.InitialDirectory = "c:\\";
fullDialog.Filter = "Image Files | *.jpg";
fullDialog.RestoreDirectory = true;
}
private void thumbImageButton_Click(object sender, RoutedEventArgs e)
{
if (thumbDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
try
{
thumb.Content = thumbDialog.FileName;
iconImage = System.Drawing.Image.FromFile(thumbDialog.FileName);
}
catch (Exception er)
{
System.Windows.MessageBox.Show("Error: " + er);
}
}
}
private void fullImageButton_Click(object sender, RoutedEventArgs e)
{
if (fullDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
try
{
build.Content = fullDialog.FileName;
buildImage = System.Drawing.Image.FromFile(fullDialog.FileName);
}
catch (Exception er)
{
System.Windows.MessageBox.Show("Error: " + er);
}
}
}
private void addButton_Click(object sender, RoutedEventArgs e)
{
bool valid = true;
string errorMessage = "Please correct the following errors: \n";
if((bool)ltoNo.IsChecked) {
lto = 0;
} else if ((bool)ltoYes.IsChecked) {
lto = 1;
}
else {valid = false;
errorMessage += "LTO option must be selected!\n";
}
if(locationBox.SelectedIndex != -1) {
itemLocation = locationBox.SelectedIndex + 1;
} else {
valid = false;
errorMessage += "Please select a location!\n";
}
if(nameBox.Text != "") {
itemName = nameBox.Text;
} else {
valid = false;
errorMessage += "Please enter a name for the item!\n";
}
if(iconImage == null || buildImage == null) {
valid = false;
errorMessage += "Please selected both a thumbnail and fullsize image!";
}
if(valid) {
byte[] iconImageBytes = ConvertImgToArray(iconImage, System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] buildImageBytes = ConvertImgToArray(buildImage, System.Drawing.Imaging.ImageFormat.Jpeg);
SQLiteCommand sql = new SQLiteCommand("INSERT INTO items (name, location, lto, icon, buildImage) values (@name, @location, @lto, @icon, @buildImage)", con);
sql.Parameters.Add("@name", DbType.String);
sql.Parameters.Add("@location", DbType.Int16);
sql.Parameters.Add("@lto", DbType.Int16);
sql.Parameters.Add("@icon", DbType.Binary);
sql.Parameters.Add("@buildImage", DbType.Binary);
sql.Parameters["@name"].Value = itemName;
sql.Parameters["@location"].Value = itemLocation;
sql.Parameters["@lto"].Value = lto;
sql.Parameters["@icon"].Value = iconImageBytes;
sql.Parameters["@buildImage"].Value = buildImageBytes;
sql.ExecuteNonQuery();
System.Windows.MessageBox.Show("Inserted: " + itemName);
// reset form
ltoNo.IsChecked = false;
ltoYes.IsChecked = false;
build.Content ="Select a Full Size Image:";
thumb.Content = "Select a Thumbnail Image";
nameBox.Text = "";
locationBox.SelectedIndex = -1;
}
else {System.Windows.MessageBox.Show(errorMessage);}
}
private void adminWindow_Closed(object sender, EventArgs e)
{
con.Close();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
DateTime now = DateTime.Now;
string updateText = "updated," + now + "\n";
uploader.uploadFile("Z:\\bk.db", "bk.db");
uploader.appendFile(updateText, "update.txt");
System.Windows.MessageBox.Show("Changes published to server");
}
}
}
和ftp类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;
namespace Burger_King_Database
{
class ftp
{
private string host;
private string user;
private string pass;
private FtpWebRequest request = null;
private Stream stream = null;
public ftp(string hostString, string userName, string password) {
this.host = hostString;
this.user = userName;
this.pass = password;
}
public void uploadFile(string local, string remote)
{
try
{
request = (FtpWebRequest)WebRequest.Create("ftp://" + host + "/" + remote);
request.Credentials = new NetworkCredential(user, pass);
request.Method = WebRequestMethods.Ftp.UploadFile;
request.KeepAlive = true;
stream = request.GetRequestStream();
FileStream localStream = new FileStream(local, FileMode.Open);
byte[] buffer = new byte[1024];
int read = localStream.Read(buffer, 0, 1024);
try
{
while (read != 0)
{
stream.Write(buffer, 0, read);
read = localStream.Read(buffer, 0, 1024);
}
}
catch (Exception e) { Console.WriteLine(e.Message); }
stream.Close();
localStream.Close();
request = null;
}
catch (Exception e) { Console.WriteLine(e.Message); }
return;
}
public void appendFile(string appendText, string remoteFile)
{
try
{
request = (FtpWebRequest)WebRequest.Create("ftp://" + host + "/" + remoteFile);
request.Credentials = new NetworkCredential(user, pass);
request.KeepAlive = true;
request.Method = WebRequestMethods.Ftp.AppendFile;
stream = request.GetRequestStream();
byte[] text = Encoding.ASCII.GetBytes(appendText);
stream.Write(text, 0, text.Length);
stream.Close();
request = null;
}
catch (Exception e) { Console.WriteLine(e.Message); }
}
}
}