vb.net获取系统键盘 vb获取控制台返回结果

vb.net在for循环中如何获取键盘按键Public Sub TextBox_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs)
Dim SplitStr As String = ","
Dim SelectionStart As Integer = sender.SelectionStart
Dim TextLength As Integer = sender.Text.Length
'------------------------------------------------------------------
Select Case Asc(e.KeyChar)
Case Is = 8 '"回删"
Dim str As String = sender.text
Dim Array = Split(sender.text, ",", -1)
If sender.SelectionStart = str.Length Then
If str.Contains(",") Then
Dim text = ""
For x = 0 To UBound(Array) - 1
If text = "" Then
text= Array(x)
Else
text= ","Array(x)
End If
Next
sender.text = text
sender.SelectionStart = text.Length
e.KeyChar = Chr(0)
End If
End If
Case Asc("0") To Asc("9") '" 0 to 9 "
e.KeyChar = e.KeyChar
Case Is = 44, 45 '","
Select Case TextLength
Case Is = 0
e.KeyChar = Chr(0)
Case Else
Select Case SelectionStart
Case 0
e.KeyChar = Chr(0)
Case 1 To TextLength - 1
If Mid(sender.text, SelectionStart, 1) = SplitStr Or Mid(sender.text, SelectionStart1, 1) = SplitStr Then
e.KeyChar = Chr(0)
Else
e.KeyChar = e.KeyChar
End If
Case TextLength
If Mid(sender.text, SelectionStart, 1) = SplitStr Then
e.KeyChar = Chr(0)
Else
e.KeyChar = e.KeyChar
End If
End Select
End Select
Case Else
e.KeyChar = Chr(0)
End Select
End Sub
这是我的程序中复制过来的,只能输入数据字与逗号还有下划线,你查一下F和J的Ass吗是多少,改写一下就OK
vb.net 获取键盘输入的字符参考方法如下,具体解释已经注解在代码中;
/定义变量
public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
static int hKeyboardHook = 0;
HookProc KeyboardHookProcedure;
/*************************
* 声明API函数
* ***********************/
// 安装钩子 (using System.Runtime.InteropServices;)
[DllImport("user32.dll",CharSet=CharSet.Auto, CallingC.StdCall)]
public static extern int SetWindowsHookEx(int idHook,HookProc lpfn, IntPtr hInstance, int threadId);
// 卸载钩子
[DllImport("user32.dll",CharSet=CharSet.Auto, CallingC.StdCall)]
public static extern bool UnhookWindowsHookEx(int idHook);
// 继续下一个钩子
[DllImport("user32.dll",CharSet=CharSet.Auto, CallingC.StdCall)]
public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);
// 取得当前线程编号(线程钩子需要用到)
[DllImport("kernel32.dll")]
static extern int GetCurrentThreadId();
//钩子子程:就是钩子所要做的事情
private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
{
if (nCode = 0)
{
/****************
//线程键盘钩子判断是否按下键
Keys keyData = https://www.04ip.com/post/(Keys)wParam;
if(lParam.ToInt32()0)
{
// 键盘按下
}
if(lParam.ToInt32()0)
{
// 键盘抬起
}
****************/
/****************
//全局键盘钩子判断是否按下键
wParam = = 0x100 // 键盘按下
wParam = = 0x101 // 键盘抬起
****************/
KeyMSG m = (KeyMSG) Marshal.PtrToStructure(lParam, typeof(KeyMSG));//键盘
// 在这里添加你想要做是事情(比如把键盘nCode记录下来,搞个邮件发送程序发到自己的邮箱去)
return 0;//如果返回1 , 则结束消息,这个消息到此为止,不再传递 。如果返回0或调用CallNextHookEx函数则消息出了这个钩子继续往下传递 , 也就是传给消息真正的接受者
}
return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
}
//键盘结构
public struct KeyMSG
{
public int vkCode; //键值
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
// 安装钩子
public void HookStart()
{
if(hKeyboardHook == 0)
{
// 创建HookProc实例
KeyboardHookProcedure = new HookProc(KeyboardHookProc);
// 设置线程钩子
hKeyboardHook = SetWindowsHookEx( 13,KeyboardHookProcedure,Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0);
//************************************
//键盘线程钩子
//SetWindowsHookEx( 2,KeyboardHookProcedure, IntPtr.Zero, GetCurrentThreadId()); //GetCurrentThreadId()为要监视的线程ID,你完全可以自己写个方法获取QQ的线程哦
//键盘全局钩子,需要引用空间(using System.Reflection;)
//SetWindowsHookEx( 13,KeyboardHookProcedure,Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0);
//
//关于SetWindowsHookEx (int idHook, HookProc lpfn, IntPtr hInstance, int threadId)函数将钩子加入到钩子链表中,说明一下四个参数:
//idHook 钩子类型,即确定钩子监听何种消息,上面的代码中设为2,即监听键盘消息并且是线程钩子,如果是全局钩子监听键盘消息应设为13,
//线程钩子监听鼠标消息设为7,全局钩子监听鼠标消息设为14 。
//
//lpfn 钩子子程的地址指针 。如果dwThreadId参数为0 或是一个由别的进程创建的线程的标识 , lpfn必须指向DLL中的钩子子程 。除此以外,lpfn可
//以指向当前进程的一段钩子子程代码 。钩子函数的入口地址,当钩子钩到任何消息后便调用这个函数 。
【vb.net获取系统键盘 vb获取控制台返回结果】//
//hInstance应用程序实例的句柄 。标识包含lpfn所指的子程的DLL 。如果threadId 标识当前进程创建的一个线程,而且子程代码位于当前
//进程,hInstance必须为NULL 。可以很简单的设定其为本应用程序的实例句柄 。
//
//threadedId 与安装的钩子子程相关联的线程的标识符 。如果为0,钩子子程与所有的线程关联,即为全局钩子 。
//************************************
// 如果设置钩子失败
if(hKeyboardHook == 0 )
{
HookStop();
throw new Exception("SetWindowsHookEx failed.");
}
}
}
// 卸载钩子
public void HookStop()
{
bool retKeyboard = true;
if(hKeyboardHook != 0)
{
retKeyboard = UnhookWindowsHookEx(hKeyboardHook);
hKeyboardHook = 0;
}
if (!( retKeyboard))
throw new Exception("UnhookWindowsHookEx failed.");
}
VB.net 中如何获取键盘输入的ASCii码Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
If Asc(0) Then
textbox1.text="0"
end if
end sub
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