.net 按行切割数组

aspx

<asp:TextBox ID="TextBox1" runat="server" Rows="10" style="margin-bottom: 0px" 
    TextMode="MultiLine">1&#13;2&#13;3&#13;4</asp:TextBox>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />

cs

protected void Button1_Click(object sender, EventArgs e)
        { 
            string str = this.TextBox1.Text;
            string[] arr = str.Split('\n');
            for (int i = 0; i < arr.Length; i++) {
                Response.Write(arr[i]+"<br>");
            }
            Response.End();
        }