VB.NET下遍歷TextBox組件的方法

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    Private Sub TextBox1_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
        Dim ch As Char = e.KeyChar
        If Not Regex.IsMatch(ch.ToString(), "^[\b\r0-9a-fA-F]$") Then
            e.KeyChar = "" '放棄輸入的非法字符
            MessageBox.Show("請(qǐng)正確輸入16進(jìn)制數(shù)!!!", "系統(tǒng)提示", MessageBoxButtons.OK, MessageBoxIcon.Error)
        Else
            e.KeyChar = Char.ToUpper(ch) '強(qiáng)制轉(zhuǎn)換為大寫(xiě)字母,放過(guò)退格和回車符
        End If
    End Sub
    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        Dim Addr As UInt16
        Dim Val As Byte
        Dim Index As Integer
        Try
            Addr = Convert.ToUInt16(ComboBox1.Text, 16) + 1 '取狀態(tài)口地址
            Val = WinIoPort(Addr) '讀出并口控制口數(shù)據(jù)
            TextBox26.Text = Val.ToString("X02") '顯示字節(jié)數(shù)據(jù)
        Catch ex As Exception '異常捕捉
            MessageBox.Show(ex.Message, "系統(tǒng)提示", MessageBoxButtons.OK, MessageBoxIcon.Error)
        End Try
        For Each c As Control In GroupBox2.Controls '遍歷GroupBox2上的控件
            If TypeOf (c) Is TextBox Then '只遍歷TextBox類型的控件
                If c.TabIndex <> TextBox26.TabIndex Then '排除TextBox26控件
                    Index = TextBox10.TabIndex - c.TabIndex '計(jì)算相對(duì)位D0~D7
                    c.Text = ((Val And (1 << Index)) >> Index).ToString("0") '填入數(shù)據(jù)位
                End If
            End If
        Next
    End Sub
    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
        Dim Addr As UInt16
        Dim Val As Byte
        Dim Index As Integer
        Try
            Addr = Convert.ToUInt16(ComboBox1.Text, 16) + 2 '取控制口地址
            Val = WinIoPort(Addr) '讀出并口控制口數(shù)據(jù)
        Catch ex As Exception '異常捕捉
            MessageBox.Show(ex.Message, "系統(tǒng)提示", MessageBoxButtons.OK, MessageBoxIcon.Error)
        End Try
        For Each c As Control In GroupBox3.Controls '遍歷GroupBox3上的控件
            If TypeOf (c) Is TextBox Then '只遍歷TextBox類型的控件
                Index = TextBox18.TabIndex - c.TabIndex '計(jì)算相對(duì)位D0~D7
                c.Text = ((Val And (1 << Index)) >> Index).ToString("0") '填入數(shù)據(jù)位
            End If
        Next
    End Sub
    Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
        Dim Addr As UInt16
        Dim Val As Byte = 0
        Dim Index As Integer
        Try
            Addr = Convert.ToUInt16(ComboBox1.Text, 16) + 2 '取控制口地址
            For Each c As Control In GroupBox3.Controls '遍歷GroupBox3上的控件
                If TypeOf (c) Is TextBox Then '只遍歷TextBox類型的控件
                    Index = TextBox18.TabIndex - c.TabIndex '計(jì)算相對(duì)位D0~D7
                    If c.Text = "1" Then
                        Val = Val Or (1 << Index) '組裝數(shù)據(jù)位
                    End If
                End If
            Next
            WinIoPort(Addr) = Val '寫(xiě)入并口字節(jié)數(shù)據(jù)
        Catch ex As Exception '異常捕捉
            MessageBox.Show(ex.Message, "系統(tǒng)提示", MessageBoxButtons.OK, MessageBoxIcon.Error)
        End Try
    End Sub