C#如何获取窗体的TextBox的值

stringstr=textboxtexttostring();

string[]strArr=strSplit(newchar[]{''});

strArr里每一个再用一个string转int的函数就可以了

Private Sub Command1_Click()

meshow

Dim x As Long, sum As Long, n As Long

n = Val(InputBox("输入N值"))

For i = 1 To n

x = 1

For j = 1 To i

x = x j

Next

sum = sum + x

Next

print sum

End Sub

一楼好搞笑 “你给的式子去掉感叹号就是了”

窗口程序获得键盘输入的值，你肯定得拖个textbox之类的文本框吧，然后在后台定义变量(双击你拖到面板上的文本框，进去后台)，用变量来获得你输入的值呀，比如

int

i=

ConvertToInt32(textboxtext);//ConvertToInt32是把你从键盘获得的值（字符）转换成整型，textboxtext是获取文本框的值，当然这个得看你的文本框的name属性是什么（第一个默认是textbox1，第二个默认是textbox2，以此类推），一般规范编程都要改名字的额，比我成UID（用户名），那么我获取就是UIDtext

1、父页面

代码如下:

<input type="text" id="name" value="zhangsan"/>

<a href="ahtml" target="_blank">预览</a>

2、子页面，也就是ahtml获取父页面中文本框的value

代码如下:

$(function(){

consoleinfo(windowopenerdocumentgetElementById("name")value);

});

这样控制台中出来的则是父页面文本框的值

全局键盘钩子，如下，你再把键盘钩子的数据弄到textbox就可以了。

using System;

using SystemRuntimeInteropServices;

using SystemReflection;

using SystemThreading;

using SystemWindowsForms;

using SystemDiagnostics;

using SystemCollectionsGeneric;

namespace HookGlobal

{

/// <summary>

/// 这个类可以让你得到一个在运行中程序的所有键盘事件

/// 并且引发一个带KeyEventArgs和MouseEventArgs参数的NET事件以便你很容易使用这些信息

/// </summary>

/// <remarks>

/// 修改:lihx

/// 修改时间:04118

/// </remarks>

public class KeyBordHook

{

private const int WM_KEYDOWN = 0x100;

private const int WM_KEYUP = 0x101;

private const int WM_SYSKEYDOWN = 0x104;

private const int WM_SYSKEYUP = 0x105;

//全局的事件

public event KeyEventHandler OnKeyDownEvent;

public event KeyEventHandler OnKeyUpEvent;

public event KeyPressEventHandler OnKeyPressEvent;

static int hKeyboardHook = 0; //键盘钩子句柄

//鼠标常量

public const int WH_KEYBOARD_LL = 13; //keyboard hook constant

HookProc KeyboardHookProcedure; //声明键盘钩子事件类型

//声明键盘钩子的封送结构类型

[StructLayout(LayoutKindSequential)]

public class KeyboardHookStruct

{

public int vkCode; //表示一个在1到254间的虚似键盘码

public int scanCode; //表示硬件扫描码

public int flags;

public int time;

public int dwExtraInfo;

}

//装置钩子的函数

[DllImport("user32dll", CharSet = CharSetAuto, CallingConvention = CallingConventionStdCall)]

public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);

//卸下钩子的函数

[DllImport("user32dll", CharSet = CharSetAuto, CallingConvention = CallingConventionStdCall)]

public static extern bool UnhookWindowsHookEx(int idHook);

//下一个钩挂的函数

[DllImport("user32dll", CharSet = CharSetAuto, CallingConvention = CallingConventionStdCall)]

public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);

[DllImport("user32")]

public static extern int ToAscii(int uVirtKey, int uScanCode, byte[] lpbKeyState, byte[] lpwTransKey, int fuState);

[DllImport("user32")]

public static extern int GetKeyboardState(byte[] pbKeyState);

[DllImport("kernel32dll", CharSet = CharSetAuto,

CallingConvention = CallingConventionStdCall)]

private static extern IntPtr GetModuleHandle(string lpModuleName);

public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);

//先前按下的键

public List<Keys> preKeys = new List<Keys>();

/// <summary>

/// 墨认的构造函数构造当前类的实例并自动的运行起来

/// </summary>

public KeyBordHook()

{

Start();

}

//析构函数

~KeyBordHook()

{

Stop();

}

public void Start()

{

//安装键盘钩子

if (hKeyboardHook == 0)

{

KeyboardHookProcedure = new HookProc(KeyboardHookProc);

//hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, MarshalGetHINSTANCE(AssemblyGetExecutingAssembly()GetModules()[0]), 0);

Process curProcess = ProcessGetCurrentProcess();

ProcessModule curModule = curProcessMainModule;

hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, GetModuleHandle(curModuleModuleName), 0);

if (hKeyboardHook == 0)

{

Stop();

throw new Exception("SetWindowsHookEx ist failed");

}

}

}

public void Stop()

{

bool retKeyboard = true;

if (hKeyboardHook != 0)

{

retKeyboard = UnhookWindowsHookEx(hKeyboardHook);

hKeyboardHook = 0;

}

//如果卸下钩子失败

if (!(retKeyboard)) throw new Exception("UnhookWindowsHookEx failed");

}

private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)

{

if ((nCode >= 0) && (OnKeyDownEvent != null || OnKeyUpEvent != null || OnKeyPressEvent != null))

{

KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)MarshalPtrToStructure(lParam, typeof(KeyboardHookStruct));

//当有OnKeyDownEvent 或 OnKeyPressEvent不为null时,ctrl alt shift keyup时 preKeys

//中的对应的键增加

if ((OnKeyDownEvent != null || OnKeyPressEvent != null) && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))

{

Keys keyData = (Keys)MyKeyboardHookStructvkCode;

if (IsCtrlAltShiftKeys(keyData) && preKeysIndexOf(keyData) == -1)

{

preKeysAdd(keyData);

}

}

//引发OnKeyDownEvent

if (OnKeyDownEvent != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))

{

Keys keyData = (Keys)MyKeyboardHookStructvkCode;

KeyEventArgs e = new KeyEventArgs(GetDownKeys(keyData));

OnKeyDownEvent(this, e);

}

//引发OnKeyPressEvent

if (OnKeyPressEvent != null && wParam == WM_KEYDOWN)

{

byte[] keyState = new byte[256];

GetKeyboardState(keyState);

byte[] inBuffer = new byte[2];

if (ToAscii(MyKeyboardHookStructvkCode,

MyKeyboardHookStructscanCode,

keyState,

inBuffer,

MyKeyboardHookStructflags) == 1)

{

KeyPressEventArgs e = new KeyPressEventArgs((char)inBuffer[0]);

OnKeyPressEvent(this, e);

}

}

//当有OnKeyDownEvent 或 OnKeyPressEvent不为null时,ctrl alt shift keyup时 preKeys

//中的对应的键删除

if ((OnKeyDownEvent != null || OnKeyPressEvent != null) && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP))

{

Keys keyData = (Keys)MyKeyboardHookStructvkCode;

if (IsCtrlAltShiftKeys(keyData))

{

for (int i = preKeysCount - 1; i >= 0; i--)

{

if (preKeys[i] == keyData)

{

preKeysRemoveAt(i);

}

}

}

}

//引发OnKeyUpEvent

if (OnKeyUpEvent != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP))

{

Keys keyData = (Keys)MyKeyboardHookStructvkCode;

KeyEventArgs e = new KeyEventArgs(GetDownKeys(keyData));

OnKeyUpEvent(this, e);

}

}

return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);

}

private Keys GetDownKeys(Keys key)

{

Keys rtnKey = KeysNone;

foreach (Keys keyTemp in preKeys)

{

switch (keyTemp)

{

case KeysLControlKey:

case KeysRControlKey:

rtnKey = rtnKey | KeysControl;

break;

case KeysLMenu:

case KeysRMenu:

rtnKey = rtnKey | KeysAlt;

break;

case KeysLShiftKey:

case KeysRShiftKey:

rtnKey = rtnKey | KeysShift;

break;

default:

break;

}

}

rtnKey = rtnKey | key;

return rtnKey;

}

private Boolean IsCtrlAltShiftKeys(Keys key)

{

switch (key)

{

case KeysLControlKey:

case KeysRControlKey:

case KeysLMenu:

case KeysRMenu:

case KeysLShiftKey:

case KeysRShiftKey:

return true;

default:

return false;

}

}

}

}

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