復選框使用vb.net在文本框中選擇逗號sepearted字符串中的值！

Question

我有3個復選框和1個文本框

checkbox1，checkbox2，checkbox3

當我檢查第一個checkbox1然后復選框3然后在文本框中它將顯示為1,3完全........ !!

僅使用vb.net .........

Answer 1

嘗試：

Private Sub CheckBox_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox3.CheckedChanged, CheckBox2.CheckedChanged, CheckBox1.CheckedChanged

    Dim sb As New System.Text.StringBuilder
    sb.Append(CStr(IIf(CheckBox1.Checked, "1 ", "")))
    sb.Append(CStr(IIf(CheckBox2.Checked, "2 ", "")))
    sb.Append(CStr(IIf(CheckBox3.Checked, "3 ", "")))
    TextBox1.Text = sb.ToString.Trim
End Sub