字符编码

aspx页面：

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " CodeNew.aspx.cs "  Inherits = " CodeNew "   %>

<! DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< html xmlns = " http://www.w3.org/1999/xhtml "   >
< head runat = " server " >
     < title > 无标题页 </ title >
</ head >
< body >
     < form id = " form1 "  runat = " server " >
     < div >
    form id = " Form2 "  runat = " server " >
请输入字符串:
  < asp:textbox id = " textbox_1 "  runat = " server " />
  < asp:button id = " button_1 "  text = " 提交 "  runat = " server " />
< br />
您输入的字符串长度:
< asp:label id = " label_0 "  runat = " server " />< br />
字符码为: & nbsp;
         < asp:Label ID = " Label_1 "  runat = " server "  Text = " Label "  Width = " 50px " ></ asp:Label >< br />
ascii码编码:
< asp:label id = " label_2 "  runat = " server " ></ asp:label >< br />
html编码为:
< asp:label id = " label_3 "  runat = " server " ></ asp:label >< br />
html编码以字符输出:
< asp:label id = " label_4 "  runat = " server " />< br />  
     </ div >
     </ form >
</ body >
</ html >

C#代码：

using  System;
using  System.Data;
using  System.Configuration;
using  System.Collections;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;
using  System.Drawing;
using  System.Text;

public  partial  class  CodeNew : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    
        if (!IsPostBack)
        {
           Response.Write("还没有输入任何字符!<br><br>");
        }
        else
        {
            Label_1.Text = "";
            label_2.Text = "";
            label_0.Text = Convert.ToString((textbox_1.Text).Length);
            //ascii编码输出
            bytefunction(textbox_1.Text);
            //字符码输出
            charfunction(textbox_1.Text);
            //html编码输出
            htmlfunction(textbox_1.Text);
        }
    }
    //ascii编码输出函数
    void bytefunction(string str)
    {
        byte[] mybytes = System.Text.Encoding.ASCII.GetBytes(str);
        for (int i = 0; i < str.Length; i++)
        {
            label_2.Text += Convert.ToString(mybytes[i]) + " ";
        }
    }
    //字符码输出函数
    void charfunction(string str)
    {
        byte[] mybytes = System.Text.Encoding.ASCII.GetBytes(str);
        char[] mychars = System.Text.Encoding.ASCII.GetChars(mybytes);
        //label_2.text=new string(mychars);
        for (int i = 0; i < str.Length; i++)
        {
            Label_1.Text += Convert.ToString(mychars[i]) + " ";
        }
    }
    //html编码输出函数
    void htmlfunction(string str)
    {
        string str_html = (Server.HtmlEncode(str));
        label_3.Text = str_html;
        label_4.Text = Server.HtmlEncode(str_html);
    }
}