いくつかのファイルを自動的にメールで送信するアプリケーションを作成しました。問題は、別のデータベース (sdf ファイル) に電子メールアドレスがあることです。
「q1869」のような「filenaam」の値を検索したい。その変数は、データベース (automail.sdf) で検索する必要があります。そして、「q1869」が含まれているものがある場合。次に、2 番目のフィールドでその行の値を取得します。これは、私の場合は "email" です。
今、私は多くのことを試しました。しかし、私は今問題に出くわしました。
このコードを実行すると、「オブジェクト参照がオブジェクトのインスタンスに設定されていません」というメッセージが表示されます。エラーstring emailaddress = getemail.ExecuteScalar().ToString();
System.Windows.Forms.Timer mytimer = new System.Windows.Forms.Timer();
//Automail mail = new Automail();
public Form1()
{
InitializeComponent();
//timer aanmaken, interval instellen en aanzetten + gegevens in datatable laden
mytimer.Tick +=mytimer_Tick;
mytimer.Interval = 10000;
Methods methods = new Methods();
Populate();
}
public OdbcConnection con = new OdbcConnection("Driver={iSeries Access ODBC Driver};uid=AYISHB;system=NLPROD;dbq=MMASHB MMASHB;dftpkglib=QGPL;languageid=ENU;pkg=QGPL/DEFAULT(IBM),2,0,1,0,512;qrystglmt=-1;signon=1;trace=2");
public iDB2Connection conn = new iDB2Connection("DataSource=NLPROD;UserID=AYISHB;Password=AYI;DataCompression=True;Default Collection=mmashb;");
public SqlCeConnection dbcon = new SqlCeConnection(@"Data Source=E:\Users\Ali\Documents\automail.sdf");
SmtpClient SmtpServer = new SmtpClient("smtp.dsv.com"); // smtp client maken
int aantalmails = 0;
public DataTable dt = new DataTable();
///////////////////////////methodes//////////////////////////
//Vul dataGridView1 methode
public void Populate()
{
dt.Clear();
OdbcCommand cm = new OdbcCommand("SELECT * FROM SELECTIE ORDER BY OMSCH",con); //querycommand om gegevens te openen
OdbcDataAdapter da = new OdbcDataAdapter();
da.SelectCommand = cm; // data adapter command aanmaken
da.Fill(dt); // datatable vullen met de data
}
public void sendMail()
{
while (true)
{
Populate();
if (dt.Rows.Count >= 1)
{
for (int x = dt.Rows.Count - 1; x >= 0; --x)
{
int i = x; //i is aantal rijen
int r = 1;
string query = dt.Rows[i][r].ToString();// zet de querynummer om in een string
string filenaam = query.Trim(); // haal de overtollige spaties uit de naam en filenaam is de querynmr
SqlCeCommand getemail = new SqlCeCommand("SELECT email" + " FROM Emails" + " WHERE (query LIKE @querynaam)" , dbcon);
getemail.Parameters.AddWithValue("@querynaam", filenaam);
string emailaddress = getemail.ExecuteScalar().ToString();
MessageBox.Show(emailaddress);
//try
//{
//}
//catch (Exception ex)
//{
// MessageBox.Show(ex.Message);
//}
System.Diagnostics.Process.Start(@"M:\dtf\" + filenaam + ".dtf"); // start de dtf bestand met de zelfde querynaam op de M schijf
Thread.Sleep(15000); // wacht 15 seconden
try
{
MailMessage mail = new MailMessage();//
mail.From = new MailAddress("ali.yilmaz@nl.dsv.com");
mail.To.Add(emailaddress.ToString());
mail.Subject = "Report " + filenaam + " DSV REPORT";
mail.Body = "Dear Customer,\nthis message is an automated mail sent by an unattended server. \nThe attachment included in this mail is: " + filenaam + "\nPlease do not reply to this email \n \nThis mail has been sent on " + string.Format("{0:HH:mm:ss:tt yyyy-MM-dd}", DateTime.Now);
System.Net.Mail.Attachment attachment;
attachment = new System.Net.Mail.Attachment(@"M:/" + filenaam + ".xls");
mail.Attachments.Add(attachment);
SmtpServer.Credentials = new System.Net.NetworkCredential("ali.yilmaz@nl.dsv.com", "Uran1234");
SmtpServer.Send(mail);
mail.Dispose();
Thread.Sleep(10000);
string sourcefile = @"M:\" + filenaam + ".xls";
string destinationfile = @"M:\verzondenreports\" + filenaam + ".xls";
if (System.IO.File.Exists(@"M:\verzondenreports\" + filenaam + ".xls"))
{
System.IO.File.Delete(@"M:\verzondenreports\" + filenaam + ".xls");
System.IO.File.Move(sourcefile, destinationfile);
}
else
{
System.IO.File.Move(sourcefile, destinationfile);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
Thread.Sleep(2000);
try
{
iDB2DataAdapter data = new iDB2DataAdapter("SELECT FROM SELECTIE ORDER BY OMSCH", conn);
data.DeleteCommand = new iDB2Command("DELETE FROM SELECTIE WHERE" + filenaam, conn);
data.DeleteCommand.ExecuteNonQuery();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
if (dt.Rows.Count > 0)
{
dt.Rows[i].Delete();
}
else
{
return;
}
dt.AcceptChanges();
filenaam = "";
}
dt.Clear();
}
else
{
dt.Clear();
Populate();
}
}
}
///////////////////////////methodes//////////////////////////
//wanneer form word opgestart
private void Form1_Shown(object sender, EventArgs e)
{
try
{
//open connecties
con.Open();
conn.Open();
dbcon.Open();
//vul de tabel met de gegevens
Populate();
}
catch(iDB2Exception ex)
{
// als connectie niet lukt weergeef foutmelding
MessageBox.Show(ex.Message);
}
}
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
con.Close();
conn.Close();
}
private void button1_Click(object sender, EventArgs e)
{
label2.Text = ("Running...");
mytimer.Enabled = true;
Thread t = GetT();
t.Start();
//Populate();
//if (dataGridView1.Rows.Count > 1)
//{
// int count = dataGridView1.Rows.Count;
// for (int x = 0; x <= dataGridView1.Rows.Count; x++)
// {
// int i = 0;
// int r = 1;
// string number = dataGridView1.Rows[i].Cells[r].Value.ToString();
// string filenaam = number.Trim();
// textBox1.Text = filenaam;
// System.Diagnostics.Process.Start(@"M:\dtf\" + filenaam + ".dtf");
// i = i++;
// Thread.Sleep(100);
// }
// //OdbcCommand cm = new OdbcCommand("DELETE FROM SELECTIE WHERE *", con);
// //OdbcDataAdapter da = new OdbcDataAdapter();
// //da.DeleteCommand = cm;
// iDB2DataAdapter data = new iDB2DataAdapter("SELECT FROM SELECTIE ORDER BY OMSCH", conn);
// conn.Open();
// data.DeleteCommand = new iDB2Command("DELETE FROM SELECTIE", conn);
// data.DeleteCommand.ExecuteNonQuery();
//}
//else
//{
// Populate();
//}
//conn.Close();
//Populate();
}
private Thread GetT()
{
Thread t = new Thread(new ThreadStart(sendMail));
return t;
}
void mytimer_Tick(object sender, EventArgs e)
{
//sendMail();
}
private void btnStop_Click(object sender, EventArgs e)
{
Thread t = GetT();
t.Abort();
label2.Text = ("Stopped...");
mytimer.Enabled = false;
}
private void label2_Click(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
}