.NetFramework2.0中提供了进制之间进行转化的方法：
Convert.ToString(int value,int i)
//从十进制转化成其他进制
//value即需要转化的十进制数；i目标进制
Convert.ToInt32(string value,int i)
//从其他进制转化成十进制
//value即需要转化的其他进制的数,i进制数
具体代码如下：Button1事件比较啰唆，也比较笨；Button2事件推荐使用
aspx页面：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!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>进制转换</title></head><body> <form id="form1" runat="server"> <div> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="转化" /> <asp:DropDownList ID="DropDownList1" runat="server"> <asp:ListItem Value="2">二进制</asp:ListItem> <asp:ListItem Value="8">八进制</asp:ListItem> <asp:ListItem Value="10">十进制</asp:ListItem> <asp:ListItem Value="16">十六进制</asp:ListItem> </asp:DropDownList> <asp:DropDownList ID="DropDownList2" runat="server"> <asp:ListItem Value="2">二进制</asp:ListItem> <asp:ListItem Value="8">八进制</asp:ListItem> <asp:ListItem Value="10">十进制</asp:ListItem> <asp:ListItem Value="16">十六进制</asp:ListItem> </asp:DropDownList> 转换前<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> 转换后<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox> <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="Button" /></div> </form></body></html>cs页面文件：
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;
public partial class Default2 : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) {
}
protected void Button1_Click(object sender, EventArgs e) { if (DropDownList1.SelectedValue == DropDownList2.SelectedValue) { TextBox2.Text = TextBox1.Text; } else { switch (DropDownList1.SelectedValue) { case "2": if (DropDownList2.SelectedValue == "10") { TextBox2.Text = Convert.ToInt32(TextBox1.Text, 2).ToString(); } if (DropDownList2.SelectedValue == "8")//二进制转化八进制：先转化成十进制在转化成8进制 { TextBox2.Text = Convert.ToString(Convert.ToInt32(TextBox1.Text, 2), 8); } if (DropDownList2.SelectedValue == "16") { TextBox2.Text = Convert.ToString(Convert.ToInt32(TextBox1.Text, 2), 16); } break; case "10": if (DropDownList2.SelectedValue == "2") { TextBox2.Text = Convert.ToString(int.Parse(TextBox1.Text), 2); } if (DropDownList2.SelectedValue == "8") { TextBox2.Text = Convert.ToString(int.Parse(TextBox1.Text), 8); } if (DropDownList2.SelectedValue == "16") { TextBox2.Text = Convert.ToString(int.Parse(TextBox1.Text), 16); } break; case "8": if (DropDownList2.SelectedValue == "2") { TextBox2.Text = Convert.ToString(Convert.ToInt32(TextBox1.Text,10), 2); } if (DropDownList2.SelectedValue == "10") { TextBox2.Text = Convert.ToInt32(TextBox1.Text, 8).ToString(); } if (DropDownList2.SelectedValue == "16") { TextBox2.Text = Convert.ToString(Convert.ToInt32(TextBox1.Text, 10), 16); } break; case "16": if (DropDownList2.SelectedValue == "2") { TextBox2.Text = Convert.ToString(Convert.ToInt32(TextBox1.Text, 10), 2); } if (DropDownList2.SelectedValue == "10") { TextBox2.Text = Convert.ToInt32(TextBox1.Text, 16).ToString(); } if (DropDownList2.SelectedValue == "8") { TextBox2.Text = Convert.ToString(Convert.ToInt32(TextBox1.Text, 10), 8); } break; default: TextBox2.Text = TextBox1.Text; break; } }
} /// <summary> /// 轻松实现进制之间的相互转换 /// </summary> /// <param name="value">初始值</param> /// <param name="fromBase">原来的进制</param> /// <param name="toBase">新的进制</param> /// <returns>转化后的值</returns> public string ConvertString(string value, int fromBase, int toBase) { try { int intValue = Convert.ToInt32(value, fromBase);
return Convert.ToString(intValue, toBase); } catch (Exception ex) { return ex.Message; } }
protected void Button2_Click(object sender, EventArgs e) { TextBox2.Text = ConvertString(TextBox1.Text, int.Parse(DropDownList1.SelectedValue), int.Parse(DropDownList2.SelectedValue)); }}
