textbox无法保存时间信息

nidanfeng 2004-10-18 10:02:44

在这里能否再问一下textbox在绑定DataTime字段时一保存就丢失时间信息,如我在文本框中输入"2004-08-09 07:01:01",保存后文本框你变成"2004-08-09 00:00:00".保存后的数据库中也没有时间信息只有日期.
不知何缘故,请赐教,谢谢.yeke818@hotmail.com

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切换为时间正序

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nidanfeng 2004-10-18

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数据库字段肯定是日期时间格式的,access,sql多试过,代码也就这样:
BindingContext[objts,"表1"].EndCurrentEdit();
oleDbDataAdapter1.Update(objts);

gesnpt 2004-10-18

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代码问题，把代码贴出来

precipitant 2004-10-18

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应该与文本框没有关系，如果你数据库中的字段是日期时间格式的，肯定是你的保存代码有问题。有的时候用存储过程会出现一些问题

minrange 2004-10-18

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数据库中都没有拿说明是保存的问题。
把你保存的代码贴出来

新增加打开软件时从INI文件中读取端口号、波特率等信息并显示在控件中，关闭时将关闭前的端口状态保存在ini文件中，下次打开时显示上次关闭前显示的信息。用C#写的串口通讯程序，combobox选择端口号（获得系统存在的端口），波特率等，显示发送接收的字节数，可以清空显示，可以选择是否是16进制显示，可以选择显示发送，有两种显示框一个是textbox,简单显示发送接收的时间内容，一个是richtextbox，将发送接收分别显示为蓝色和红色，状态栏显示端口状态，自己仿照大傻串口调试软件写的，有不足的地方希望提出，继续改进，谢谢

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设置窗体的代码解释 Imports System.Diagnostics Public Class 设置窗体 Private shutTime As String '关机时间的字符串 Private IsToday As Boolean = True '判断是否是今天的变量 Private delay As Integer '延时多少秒放关机 Private lastTime As Integer '关机的倒计时 Private action As String '关机或重启或注销 Private shellText As String '执行的命令字符串 Private firstShow As Boolean = True Private SysTime As Boolean = False Private autoHide As Boolean = True '启动自动隐藏 Private TotalData As New System.Diagnostics.PerformanceCounter("Network Interface", "Bytes Total/sec", "MS TCP Loopback interface") Private proTime As New System.Diagnostics.PerformanceCounter("Processor", "% Processor Time", "_Total") '双击右下角的图标的响应事件 Private Sub NotifyIcon1_MouseDoubleClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles NotifyIcon1.MouseDoubleClick If (Me.Visible = False) Then Me.Show() End If End Sub '重载窗体的关闭事件,使窗体隐藏 Private Sub Form1_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing e.Cancel = True '取消窗体的关闭动作 delayTime.Value = delay '还原delayTime控件的值 StrToItems() '还原ListBox的值 Me.Hide() End Sub Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load ComboBox1.SelectedIndex = 2 '设置默认选项 "每天" ComboBox2.SelectedIndex = 4 '设置默认选项 "关机" Timer1.Start() readReg() '读取存放在注册表的信息 StrToItems() '把字符串的信息读取到ListBox delayTime.Value = delay '把延时时间读取到delayTime控件 DateTimePicker1.Value = Today End Sub Private Sub 退出程序ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 退出程序ToolStripMenuItem.Click Me.Dispose() End Sub Private Sub 立即取消关机ToolStripMenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即取消关机ToolStripMenuItem1.Click Timer2.Stop() 取消窗体.Close() Shell("shutdown -a") Timer1.Start() End Sub Private Sub 设置关机计划ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 设置关机计划ToolStripMenuItem.Click If Me.Visible = False Then Me.Show() End If End Sub '点击确定按钮的事件处理 Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click '判断是否要开机自动运行 If autoCheck.Checked Then 创建开机自动运行() Else 删除开机自动运行() End If If Me.HideCheck.Checked Then autoHide = True Else autoHide = False End If If Me.regCheck.Checked Then 禁止修改注册表() Else 取消禁止修改注册表() End If If Me.ManCheck.Checked Then 禁止使用任务管理器() Else 取消禁止使用任务管理器() End If If Me.SysTimeCheck.Checked Then SysTime = True Else SysTime = False End If '四舍五入delayTime控件的值 delay = Math.Round(delayTime.Value, MidpointRounding.AwayFromZero) Me.Hide() ItemsToStr() '把listBox的信息保存到字符串中 writeReg() '把字符串保存把注册表中 End Sub '取消按钮事件 Private Sub canelButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles canelButton.Click StrToItems() '还原ListBox的值 delayTime.Value = delay '还原delayTime控件的值 Me.Hide() End Sub '点击添加按钮 Private Sub addButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles addButton.Click Dim tempStr As String = "" If ComboBox1.Items.Item(ComboBox1.SelectedIndex) = "指定日期" Then tempStr = DateTimePicker1.Value.ToShortDateString Else tempStr = ComboBox1.SelectedItem End If tempStr &= "," & CStr(Math.Round(hourNum.Value, MidpointRounding.AwayFromZero)) & ":" & CStr(Math.Round(minNum.Value, MidpointRounding.AwayFromZero)) & ":" & CStr(Math.Round(secNum.Value, MidpointRounding.AwayFromZero)) & "," Select Case ComboBox2.SelectedItem Case "打开网址" tempStr &= "打开网址" & "[" & TextBox1.Text.Replace(";", "；").Replace(":", "：") & "]" Case "提醒信息" tempStr &= "提醒信息" & "[" & TextBox1.Text.Replace(";", "；").Replace(":", "：") & "]" Case "打开文件" tempStr &= "打开文件" & "[" & TextBox1.Text.Replace(";", "；").Replace(":", "：") & "]" Case Else tempStr &= ComboBox2.SelectedItem End Select ListBox1.Items.Add(tempStr) End Sub '点击清除按钮 Private Sub clearButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles clearButton.Click ListBox1.Items.Clear() End Sub '把ListBox的值保存到字符串ShutTime Private Sub ItemsToStr() Dim i As Integer shutTime = "" For i = 0 To ListBox1.Items.Count - 1 '把ListBox中的各项连接到shutTime shutTime &= ListBox1.Items.Item(i) & ";" Next If shutTime "" Then '去除最后一个 ";" shutTime = Mid(shutTime, 1, shutTime.Length - 1) End If End Sub '把字符串ShutTime的值还原到ListBox Private Sub StrToItems() If shutTime "" Then '如果shutTime有保存信息 Dim temp() As String = shutTime.Split(";") 'temp字符串数组存放shutTime以";"分隔的各个字符子串 Dim t As String 't存放temp字符串数组的一项 ListBox1.Items.Clear() For Each t In temp If Not (Mid(t, 1, 2) = "今天" And Not IsToday) Then '如果今天还没过了 ListBox1.Items.Add(t) End If Next End If End Sub '读取注册表保存的信息 Private Sub readReg() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey Try key = Microsoft.Win32.Registry.LocalMachine subkey = key.OpenSubKey("SOFTWARE\AutoShutdown") shutTime = subkey.GetValue("time") delay = CInt(subkey.GetValue("delayTime")) autoHide = subkey.GetValue("autoHide") If (CStr(Today()) subkey.GetValue("day")) Then IsToday = False End If Catch ex As Exception shutTime = "" IsToday = True End Try End Sub Private Sub 禁止修改注册表() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.CurrentUser subkey = key.CreateSubKey("software\microsoft\windows\currentversion\policies\system") subkey.SetValue("disableregistrytools", 1) End Sub Private Sub 取消禁止修改注册表() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.CurrentUser subkey = key.CreateSubKey("software\microsoft\windows\currentversion\policies\system") subkey.SetValue("disableregistrytools", 0) End Sub Private Sub 禁止使用任务管理器() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.CurrentUser subkey = key.CreateSubKey("software\microsoft\windows\currentversion\policies\system") subkey.SetValue("DisableTaskMgr", 1) End Sub Private Sub 取消禁止使用任务管理器() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.CurrentUser subkey = key.CreateSubKey("software\microsoft\windows\currentversion\policies\system") subkey.SetValue("DisableTaskMgr", 0) End Sub '将需要保存的信息写入注册表 Private Sub writeReg() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.LocalMachine subkey = key.CreateSubKey("SOFTWARE\AutoShutdown") subkey.SetValue("time", shutTime) subkey.SetValue("day", CStr(Today())) subkey.SetValue("delayTime", CStr(delay)) subkey.SetValue("autoHide", autoHide) End Sub '点击删除按钮 Private Sub delButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles delButton.Click Dim delIndex As Integer = ListBox1.SelectedIndex If delIndex -1 Then ListBox1.Items.RemoveAt(delIndex) End If End Sub '最小化窗体,这里指隐藏窗体 Private Sub 最小化ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 最小化ToolStripMenuItem.Click If Me.Visible = True Then StrToItems() delayTime.Value = delay Me.Hide() End If End Sub Private Sub 创建开机自动运行() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.LocalMachine subkey = key.CreateSubKey("SOFTWARE\Microsoft\Windows\CurrentVersion\Run") subkey.SetValue("定时自动关机", Application.ExecutablePath) End Sub Private Sub 删除开机自动运行() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.LocalMachine subkey = key.OpenSubKey("SOFTWARE\Microsoft\Windows\CurrentVersion\Run", True) subkey.DeleteValue("定时自动关机") End Sub '关闭显示器 Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Integer, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer Public Const WM_SYSCOMMAND = &H112 Public Const SC_MONITORPOWER = &HF170 '关闭显示器 Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hWnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long 'Timer1的Tick事件,来监视现在的时间是否应该关机或别的了 Private Sub Timer1_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Timer1.Tick Static nowTime As Date = Now updataMsg() If SysTime Then If (Now nowTime) Then Today = nowTime TimeOfDay = nowTime End If End If nowTime = nowTime.AddSeconds(1) If (shutTime "") Then Dim temp1() As String = shutTime.Split(";") 'temp1字符串数组存放shutTime以";"分隔的各个字符子串 Dim temp2() As String, i As Integer 'temp2字符串数组存放temp1某项的字符串以","或":"分隔的字符子串 Dim TimeOut As Boolean = False 'TimeOut存放是否时间到了 For i = 0 To temp1.Length - 1 temp2 = temp1(i).Split(New Char() {",", ":"}) If IsTimeOut(temp2) Then '判断时间是否到了 TimeOut = True action = temp2(4) '是"关机","注销","重启" End If Next If TimeOut Then '如果时间到 Select Case Mid(action, 1, 4) '根据action肯定命令字符串 Case "关闭计算" shellText = "shutdown -s -f -t 0" Case "重启计算" shellText = "shutdown -r -f -t 0" Case "注销用户" shellText = "shutdown -l -f -t 0" Case "关闭显示" SendMessage(Me.Handle.ToInt32(), WM_SYSCOMMAND, SC_MONITORPOWER, 1) Exit Sub Case "锁定计算" shellText = "rundll32.exe user32.dll, LockWorkStation" Case "打开文件" System.Diagnostics.Process.Start(Mid(action, 6, action.Length - 6).Replace("：", ":")) Exit Sub Case "提醒信息" MsgBox(Mid(action, 6, action.Length - 6), , "提醒信息") Exit Sub Case "打开网址" System.Diagnostics.Process.Start(Mid(action, 6, action.Length - 6).Replace("：", ":")) Exit Sub End Select lastTime = delay '倒计时等于延时 Timer2.Start() '倒计时开始取消窗体.Show() '倒计时窗口打开 Timer1.Stop() End If End If End Sub '判断时间是否到了 Private Function IsTimeOut(ByRef t() As String) As Boolean '如果时分秒都相等 If t(1) = CStr(Hour(Now())) And t(2) = CStr(Minute(Now()) And t(3) = Second(Now)) Then Select Case t(0) Case "每天" Return True Case "今天" Return True Case "每周二" If Weekday(Now) = FirstDayOfWeek.Tuesday Then Return True End If Case "每周六" If Weekday(Now) = FirstDayOfWeek.Saturday Then Return True End If Case "每周日" If Weekday(Now) = FirstDayOfWeek.Sunday Then Return True End If Case "每周三" If Weekday(Now) = FirstDayOfWeek.Wednesday Then Return True End If Case "每周四" If Weekday(Now) = FirstDayOfWeek.Thursday Then Return True End If Case "每周五" If Weekday(Now) = FirstDayOfWeek.Friday Then Return True End If Case "每周一" If Weekday(Now) = FirstDayOfWeek.Monday Then Return True End If Case "每周一至周五" If Weekday(Now) > FirstDayOfWeek.Sunday And Weekday(Now) < FirstDayOfWeek.Saturday Then Return True End If Case Else If (t(0) = Today.ToShortDateString) Then Return True End If End Select End If Return False End Function '刷新Msg控件 Private Sub updataMsg() Dim xingqi As String = "" Select Case Weekday(Now) Case 1 xingqi = "星期天" Case 2 xingqi = "星期一" Case 3 xingqi = "星期二" Case 4 xingqi = "星期三" Case 5 xingqi = "星期四" Case 6 xingqi = "星期五" Case 7 xingqi = "星期六" End Select msg.Text = "当前时间" & Now().ToLongDateString & " " & Now().ToLongTimeString & " " & xingqi & " CPU使用" & Format(proTime.NextValue, "#0") & "% 网速" & Format(TotalData.NextValue / 1024, "########0.00") & "KB/S" Me.NotifyIcon1.Text = msg.Text End Sub '倒计时处理事件 Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick If lastTime = 0 Then '如果时间到 Shell(shellText, AppWinStyle.Hide) 取消窗体.Label1.Text = "正在" & action Else 取消窗体.Label1.Text = "离" & action & "还有" & lastTime & "秒" '显示倒计时 lastTime -= 1 End If End Sub Private Sub 设置窗体_Shown(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Shown If autoHide Then Me.Hide() End If End Sub Private Sub ComboBox2_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox2.SelectedIndexChanged Select Case ComboBox2.SelectedItem Case "打开网址" Button1.Visible = False TextBox1.Width = 299 TextBox1.Visible = True Case "提醒信息" Button1.Visible = False TextBox1.Width = 299 TextBox1.Visible = True Case "打开文件" Button1.Visible = True TextBox1.Width = 209 TextBox1.Visible = True Case Else Button1.Visible = False TextBox1.Visible = False End Select End Sub Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged If ComboBox1.SelectedItem = "指定日期" Then DateTimePicker1.Visible = True Else DateTimePicker1.Visible = False End If End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click If OpenFileDialog1.ShowDialog() = Windows.Forms.DialogResult.OK Then TextBox1.Text = OpenFileDialog1.FileName End If End Sub Private Sub 立即关机ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即关机ToolStripMenuItem.Click Shell("shutdown -s -f -t 0") End Sub Private Sub 立即重启ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即重启ToolStripMenuItem.Click Shell("shutdown -r -f -t 0") End Sub Private Sub 立即注销ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即注销ToolStripMenuItem.Click Shell("shutdown -l -f -t 0") End Sub Private Sub 立即锁定计算机ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即锁定计算机ToolStripMenuItem.Click Shell("rundll32.exe user32.dll, LockWorkStation") End Sub Private Sub 立即关闭显示器ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即关闭显示器ToolStripMenuItem.Click SendMessage(Me.Handle.ToInt32(), WM_SYSCOMMAND, SC_MONITORPOWER, 1) End Sub Private Sub LinkLabel1_LinkClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.LinkLabelLinkClickedEventArgs) Handles LinkLabel1.LinkClicked System.Diagnostics.Process.Start("http://lywang.5d6d.com/space-uid-1.html") End Sub End Class

或许不是做很好，请不要见怪基本用法：按自己的意愿布置明天所要背下来的单词，然后到了明天后当自己觉得已经背下来了，则可以使用本程序选择当天的任务（前天布置的）去测试一下背的效果。本程序的主要特点： 1，开机自动启动通过修改系统注册表实现的开机自动运行 2，会提示昨天是否有布置任务通过一个标志变量（储存于数据库）来判断当天是否有任务，确切的说应该是当作业布置完以后标志变量就被激活（为“1”的状态是激活的状态，为“0”时则未被激活）则在主人登入界面上会提示是否有任务。 3，定时自动关闭程序当程序启动后，会有20秒的时间让主人登入，否则超过了20秒后，程序自动关闭 4，自动统计答对的题数和正确率通过一些变量控制来实现对其自动统计 5，能将正确的和错误的单词明确的指出存放于TextBox 用两个变量分别实现，一个变量储存对字符串，另一个则储存错的字符串，最后根据触发事件分别显示到TextBox中 6，按钮同时具备显示和隐藏控件的效果两个按钮“答对的单词”和“答错的单词”分别用于显示对的和错的单词，按一下显示TextBox，按第二下则会隐藏TextBox 7，使用Engter键代替鼠标点击（确定按钮）或锁定控件焦点做这个功能主要用于方便文字的输入，每个窗体都具备此功能。尤其是在布置任务的窗体内更需要此功能附：本程序的初始密码为“123”

常用控件的使用(期间参杂着VS快捷键/常用设置) 公共控件: WinForm窗体 Button 按钮 Textbox 文本框 ComboBox 下拉列表框 Checkbox 复选框 RadioButton 单选框 GroupBox 分组控件 Label 标签 ListBox 列表框 PictureBox 图片框 DateTimePicker 日期时间控件 ProgressBar 进度条 NumericUpDown 数字输入框 ToolTip 气泡提示 NotifyIcon 托盘控件 TreeView 树控件 ListView 列表控件容器: Panel 面板 SplitContainer 分隔容器 TabControl 选项卡控件菜单和工具栏: ContextMenuStrip 右键菜单 MenuStrip 菜单控件 StatusStrip 状态栏控件 ToolStrip 工具栏控件 ImageList 图片集合 Timer 时间控件对话框: FolderBrowserDialog 文件夹选择 OpenFileDialog 打开文件 SaveFileDialog 保存文件一些小技巧: 部分异常全局异常日志的重要性门: 合理的使用控件面向对象的方式使用控件控件多的时候如何操作. 动态加载和组合控件自定义控件(用户控件) 遁: 窗体美化如何使用皮肤来美化控件(SkinH) 制作我们自己的窗体甲: 案例大集合读取文件到列表框显示/保存数据为csv/txt等格式. 一个简单的登录案列. 闯关游戏.

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