我正在处理我的WPF应用程序，最近我的客户告诉我，当他们想要将新客户端添加到应用程序中时，他们会随机。该应用程序是关于添加和管理客户端。
问题是我没有这个错误在我的VS上也无法解决它！
代码在这里这是我的插入按钮，用于将客户端详细信息添加到数据库中。
我正在使用大量的try和catch块来捕获此错误，但对我来说没有任何内容
我有这个标志，也可以使用插入按钮来保存编辑。
如果flag = 0将插入else去编辑
private void Button_Click_1(object sender, RoutedEventArgs e)
{
try
{
if (Class1.flag == 0)
{
DataClasses1DataContext db5 = new DataClasses1DataContext();
tbl_Gharar g = new tbl_Gharar
{
id = Convert.ToInt32(txt_Numgh.Text),
gh_Name = txt_Ghname.Text,
date_Sabt = txt_date2.Text,
date_Want = txt_Clientdate.Text,
list_Khadamat = txt_List.Text,
tozih = txt_Tozih.Text,
final_Price = Decimal.Parse(txt_Hazine.Text != String.Empty ? txt_Hazine.Text : "0"),
daryafti = txt_Daryafti.Text,
tell_hamrah = txt_tellhamrah.Text,
tell_home = txt_tellhome.Text,
gh_Pic = txt_picm.Text,
gh_Picwork = txt_picwork.Text,
// type = lst_type.SelectedItems.ToString()
};
db5.tbl_Gharars.InsertOnSubmit(g);
db5.SubmitChanges();
MessageBoxResult mres = PersianMessageBox_Mhclass.Show("saved", "info", PersianMessageBox_Mhclass.MsgMhButton.OK, PersianMessageBox_Mhclass.MsgMhIcon.Information);
this.Close();
var mainwin = System.Windows.Application.Current.Windows.Cast<Window>().FirstOrDefault(window => window is MainWindow) as MainWindow;
mainwin.mytabcont.SelectedIndex = 2;
}
else
{
try
{
DataClasses1DataContext db = new DataClasses1DataContext();
var qedit = db.tbl_Gharars.Where(c => c.id == id).SingleOrDefault();
qedit.id = Convert.ToInt32(txt_Numgh.Text);
qedit.gh_Name = txt_Ghname.Text;
qedit.date_Sabt = txt_date2.Text;
qedit.date_Want = txt_Clientdate.Text;
qedit.list_Khadamat = txt_List.Text;
qedit.tozih = txt_Tozih.Text;
qedit.final_Price = Convert.ToDecimal(txt_Hazine.Text);
qedit.daryafti = txt_Daryafti.Text;
qedit.tell_home = txt_tellhome.Text;
qedit.tell_hamrah = txt_tellhamrah.Text;
qedit.gh_Pic = txt_picm.Text;
qedit.gh_Picwork = txt_picwork.Text;
db.SubmitChanges();
MessageBoxResult mres = PersianMessageBox_Mhclass.Show("edit ", "info", PersianMessageBox_Mhclass.MsgMhButton.OK, PersianMessageBox_Mhclass.MsgMhIcon.Information);
}
catch (NullReferenceException ex)
{
System.Windows.MessageBox.Show("cant find anything",ex.Message);
}
Class1.flag = 0;
this.Close();
}
}
catch
{
}
}