vb.net文本框预输入 vb文本框的输入和输出语句

VB.NET 向指定(网页或软件)的输入框内输入字符,如何实现?假如Form1有个TextBox1,双击TextBox1填入123
Public Class Form1
Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Integer, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Integer
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub TextBox1_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.DoubleClick
System.Windows.Forms.SendKeys.Send("123")
End Sub
End Class
看你的VB.NET 版本了
用 My.Computer.Keyboard.SendKeys("123", True)代替 System.Windows.Forms.SendKeys.Send("123") 也可以
原码:
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub TextBox1_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.DoubleClick
My.Computer.Keyboard.SendKeys("123", True)
End Sub
End Class
vb.net用文本框输入数组的所有元素,数值之间用逗号分隔,统计数组中正数的个数,并显示最大值的元素下标Dim str As String = "", temp, n As Integer
Dim str1 As String = "12,45,2,9,41,31,66,83,2,1,-9,-91,-21"
Dim a() As String = Split(str1, ",")
For i = 1 To UBound(a) Step 1
a(i) = Val(a(i))
Next
temp = 0
n = 0
For i = 1 To UBound(a)
If a(i)temp Then
temp = a(i)
End If
If a(i)0 Then
n = n1
End If
Next
str = str"正数的个数为 "n
str = str"最大元素的下标为 "
For i = 1 To UBound(a)
If a(i) = temp Then
str = stri" "
End If
Next
TextBox6.Text = str
在VB.NET中加一个文本框 , 实现只能输入IP地址,像Windows的本地连接 属性里的那样用正则表达式可以实现:
Regex.IsMatch(this.textBox1.Text, @"^([1-9]|[1-9]\d|1\d{2}|2[0-1]\d|22[0-3])(\.(\d|[1-9]\d|1\d{2}|2[0-4]\d|25[0-5])){3}$")
返回是bool型vb.net文本框预输入的,调试通过vb.net文本框预输入了,可以加入到IF语句判断,楼主可以试试.
VB.NET,文本框限制输入数字个数 。例如不低于5位数而不大于11位数 。违反则有提示 。input type="text" maxlength="11" /这是控制最大输入字数至于不能少于11个字,需要在点击保存按钮时,通过.length来控制
vb.net如何在文本框里输入字符,已经绑定数据源的Listbox里面就自动跳转到该条目Private Sub Text1_Change()
For x = 0 To List1.ListCount - 1
If Text1.Text = List1.List(x) Then
List1.Selected(x) = True
End If
Next x
End Sub
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