vb.net文本框遍历 vbs遍历文件
VB.net遍历某个文件夹,并读取子目录中的指定文件
vb.net:
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Dim path = System.IO.Directory.GetFiles("D:\Log\abc", "*.txt", SearchOption.AllDirectories):搜索该路径下的所有txt类型的目录及子目录
path.AddRange(path)
Dim _RecordInfo As String
Dim _Reader As StreamReader
_Reader = New StreamReader(file, System.Text.Encoding.Default):'以Default编码的形式读取file文件(文件写入的编码要与读取的编码一致)
关于遍历VB.net窗体里面控件的问题
可以的,需要判断控件类型并做一下类型转换。
For Each c As Control In Me.Controls
If TypeOf(c) Is TextBox Then
Dim t As TextBox = CType(c ,TextBox)
'调用t的方法即可
End If
Next
用vb.net如何 编程遍历页面上所有TextBox控件并给它赋值为string.Empty?
For Each ctl As Control In Me.Controls If TryCast(ctl, TextBox) Nothing Then Dim txt As TextBox = TryCast(ctl, TextBox) txt.Text = "" End If
VB.NET 遍历 DataGridView
遍历的例子:
Dim i, j As Integer
For i = 0 To DataGridView1.RowCount - 1
For j = 0 To DataGridView1.ColumnCount - 1
MsgBox(DataGridView1.Item(j, i).Value)
Next
Next
注意:与Excel的单元格命名规则不一样,这里的 Item(j, i) 中,列号 j 在前,行号 i 在后。
vb.net panel里的控件如何遍历
Public Sub ReSetText(Control ctrl)
Dim ct As Control
For Each ct In ctrl.Controls
Try
For Each ct2 As Control In ct.Controls
ReSetText(ct2)
Next
Catch
End Try
If (TypeOf ct Is TextBox) Then
ct.Text = ""
ElseIf (TypeOf ct Is ComboBox) Then
Dim cb As System.Windows.Forms.ComboBox = DirectCast(ct, System.Windows.Forms.ComboBox)
cb.SelectedIndex = -1
End If
Next
End Sub
因为textbox在窗体里的panel里,你只遍历窗体的控件是不够的。
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