Re: [.NET] vb2005的問題?

[catchtest (蕭雲)]

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
        Dim txt As New System.Text.StringBuilder

        For i As Integer = 0 To TextBox1.Text.Length - 1
            txt.Append(Hex(Asc(TextBox1.Text(i))).ToString)
        Next

        TextBox1.Text = txt.ToString
    End Sub

※ 引述《lineage90160 ()》之銘言：
: 我想把輸入的字元轉換成ascii碼(7->55 A->65 B->66)
: EX:7AB 轉成 556566
: 然後用另外一個for迴圈每兩個抓一組換成16進位
: EX:55->37 65->41 ......
: 以下是我寫的  但是跑的結果例外
: [從字串 "" 至型別 'Long' 的轉換是無效的。]
:     Private Sub butTran_Click(ByVal sender As System.Object, ByVal e As
: System.EventArgs) Handles butTran.Click
:         Dim a As Integer
:         For i As Integer = 1 To Len(txtKr.Text)
:             a = Asc(Mid(txtKr.Text, i, i))
:         Next i
:         For j As Integer = 1 To Len(a) Step 2
:             txtKu.Text &= Hex(Mid(a, j, j + 2))
:         Next
:     End Sub

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→ fumizuki:要習慣呼叫函式要加括弧→   txt.ToString()