一。删除
1.
while (usrListView.SelectedIndex != -1) { var currentSelectIndex = usrListView.SelectedIndex; var item = usrView[currentSelectIndex]; using (StockManageDataContext smDataContext = new StockManageDataContext()) { try { smDataContext.ExecuteCommand("DELETE FROM USERS WHERE ID={0}", item.ID); usrView.RemoveAt(currentSelectIndex); } catch (Exception ex) { MessageBox.Show(ex.Message); } } }
2.
private void MenuItemDelete_Click(object sender, RoutedEventArgs e) { if (AddressList.SelectedIndex == -1) { MessageBox.Show("请选择一项!"); return; } if (MessageBox.Show("确认删除所选定的供应商信息?", "提示", MessageBoxButton.OKCancel) == MessageBoxResult.OK) { while (AddressList.SelectedIndex != -1){ var currentSelectIndex = AddressList.SelectedIndex; SHDZ selectedAddress = (SHDZ)AddressList.SelectedValue; using (WJKCDataContext wjkc = new WJKCDataContext()) { try { wjkc.ExecuteCommand("DELETE FROM SHDZ WHERE CODE={0}", selectedAddress.CODE); addressView.RemoveAt(currentSelectIndex); } catch (Exception ex) { MessageBox.Show(ex.Message); } } return; } } } }
3.
var item = smDataContext.Suppliers.SingleOrDefault(c => c.ID == (int)hl.Tag); if (item != null) { try2016-04-04 { smDataContext.Suppliers.DeleteOnSubmit(item); smDataContext.SubmitChanges(); MessageBox.Show("删除成功!"); GetSupplierData(); } catch (Exception ex) { MessageBox.Show("删除时发生错误!错误信息:"+ex.Message); } } smDataContext.Dispose(); }
二。插入
1.
try { using (StockManageDataContext smDataContext = new StockManageDataContext()) { smDataContext.Users.InsertOnSubmit(new User { UserName = usrName.Text, Password = pwd, Permission = permissionLevel }); smDataContext.SubmitChanges(); MessageBox.Show("添加用户改成功!"); usrView.Clear(); GetData(); usrName.IsEnabled = false; PasswordBox1.IsEnabled = false; PasswordBox2.IsEnabled = false; PermimissionLevels.IsEnabled = false; button1.IsEnabled = false; usrName.Text = string.Empty; PasswordBox1.Password = string.Empty; PasswordBox2.Password = string.Empty; PermimissionLevels.SelectedIndex = 0; } }
2.
try { wjkc.ExecuteCommand(" insert into SHDZ (CODE,DZ,DETAIL,ISTY) values({0},{1},{2},{3})", Code, txtAName.Text.Trim(), txtADetails.Text.Trim(), address.ISTY); lableMsg.Content = "信息添加成功!"; lableMsg.Foreground = new SolidColorBrush(Color.FromRgb(0, 0, 255)); ClearControls(); winParent.Close(); // AddressInfoWindow win = new AddressInfoWindow(); // win.Show(); }
三 编辑
1.
确保 编辑的对象是所选对象,所以传入参数要注意,并且编辑时要先填充控件。
try { wjkc.ExecuteCommand("update SHDZ set DETAIL={0},DZ={1},ISTY={2} where CODE={3};" , txtADetails.Text.Trim(), txtAName.Text.Trim(),address.ISTY,address.CODE); lblMsg.Content = "信息修改成功!"; lblMsg.Foreground = new SolidColorBrush(Color.FromRgb(0, 0, 255)); // this.Window_Closed(); this.Close(); } catch (Exception ex) { MessageBox.Show(ex.Message); }
2,。
try { using (StockManageDataContext smDataContext = new StockManageDataContext()) { string usrname = (this.Parent as LoginWindow).User; var s = smDataContext.Users.Single(c => c.UserName == usrname); s.Password = pwd; smDataContext.SubmitChanges(); MessageBox.Show("密码添加成功!"); this.NavigationService.Navigate(new Uri("LoginPage.xaml", UriKind.Relative)); } } catch (Exception ex) { MessageBox.Show(ex.Message); label_warning.Content = "提示:密码修改失败!"; }
四,根据Index的值 来判断要编辑item还是要新增item。
此步是获得index,前提是父窗口或者子窗口已经传入一个带参。
public int Index { get; set; } public SupplierAM(int index) { Index = index; InitializeComponent(); if (Index > 0) { header.Content = "修改供应商信息"; StockManageDataContext smDataContext = new StockManageDataContext(); var item = smDataContext.Suppliers.SingleOrDefault(c => c.ID == Index); textBox_name.Text = item.PsName; textBox_contacter.Text = item.PsContacter; textBox_tel.Text = item.PsTel; textBox_fax.Text = item.PsFax; } else header.Content = "添加供应商信息"; }
此步是提交按钮的事件。
private void button_submit_Click(object sender, RoutedEventArgs e) { StockManageDataContext smDataContext = new StockManageDataContext(); if (Index > 0) { var item = smDataContext.Suppliers.SingleOrDefault(c => c.ID == Index); item.PsName = textBox_name.Text; item.PsContacter = textBox_contacter.Text; item.PsTel = textBox_tel.Text; item.PsFax = textBox_fax.Text; } else { Supplier item = new Supplier(); item.PsName = textBox_name.Text; item.PsContacter = textBox_contacter.Text; item.PsTel = textBox_tel.Text; item.PsFax = textBox_fax.Text; smDataContext.Suppliers.InsertOnSubmit(item); } try { smDataContext.SubmitChanges(); MessageBox.Show("操作成功!"); DialogResult = true; Close(); } catch (Exception ex) { MessageBox.Show("发生错误!错误信息:" + ex.Message); } finally { smDataContext.Dispose(); } }