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

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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 插入语句怎么写

"insert into point_info values(' " " ' point_count ' , " " ' p1.label1.Text ' , " " 28,18,70,30 ")"

Vb.net添加字符

有甚多办法，我说个最简单的

dim xstr as string = "abcde"

Xstr = "(" xstr ")"

用VB.NET载入网页源码中的字符

'首先用webclient获得贴吧首页的源码。这里以vb,net贴吧为例

Private Sub BtnGetNum_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnGetNum.Click

Dim url As String = ""'vb.net吧的首页

Dim MyClient As System.Net.WebClient = New System.Net.WebClient

Dim MyReader As New System.IO.StreamReader(MyClient.OpenRead(url), System.Text.Encoding.Default) '定义新的文件流并读取网页文件数据

Dim longTxt As String = MyReader.ReadToEnd '写入

'分析源码，获取主题数

Dim startStr As String = "共有主题数"

Dim startNum As Long = InStr(longTxt, startStr) + Len(startStr) + 18

Dim resStr As String = ""

Do Until Mid(longTxt, startNum, 1) = “"

resStr = resStr Mid(longTxt, startNum, 1)

startNum = startNum + 1

Loop

Label1.Text = resStr '显示主题数

End Sub

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