[原创]屏蔽某IP段访问网页(完美无错版)
很多网上贴的都有点问题,数据转换成十六进制数时没做判断.
public partial class index : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//读取客户端IP地址
string Ip = Page.Request.UserHostAddress.ToString();
//LabelViewIp.Text = Ip;
//去掉IP地址中带‘.’
string[] Ip_List = Ip.Split(".".ToCharArray());
string X_Ip = "";
//循环string数组，把数据转换成十六进制数，并合并数组
foreach (string ip in Ip_List)
{
if (Convert.ToInt16(ip) < 16)
X_Ip += "0" + Convert.ToInt16(ip).ToString("x");
else
X_Ip += Convert.ToInt16(ip).ToString("x");
}
//将十六进制数转换成十进制数
long N_Ip = long.Parse(X_Ip, System.Globalization.NumberStyles.HexNumber);
IpDataIf ipdataIf = new IpDataIf();
ipdataIf.Iplong = N_Ip;
if (ipdataIf.Ifxm == 1) //string.IndexOf()
{
//Response.Write("<script language='javascript'>alert('YO YO!')</script>");
//跳转URL，终止当前页
Response.Redirect("http://www.google.com/",true);
}
else
{
//Response.Write("<script language='javascript'>alert('YO YO!')</script>");
Response.Redirect("Default.aspx");
}
}
}
}
public class IpDataIf
{
//数据库连接串
public static string constr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=IP.mdb;Jet OLEDB:Database Password=admin";
private static long iplong;
public long Iplong
{
get { return iplong; }
set { iplong = value; }
}
public int ifxm;
public int Ifxm
{
get
{
string sql = "select ifxm from address where '" + this.Iplong + "'>=ip1 and '" + this.Iplong + "'<= ip2";
ifxm = this.getcount(sql);
return ifxm;
}
}
返回受影响的行数/第一行第一列结果
}
public partial class index : System.Web.UI.Page{
protected void Page_Load(object sender, EventArgs e){if (!IsPostBack){//读取客户端IP地址string Ip = Page.Request.UserHostAddress.ToString();//LabelViewIp.Text = Ip;//去掉IP地址中带‘.’string[] Ip_List = Ip.Split(".".ToCharArray());string X_Ip = "";//循环string数组，把数据转换成十六进制数，并合并数组foreach (string ip in Ip_List){if (Convert.ToInt16(ip) < 16) X_Ip += "0" + Convert.ToInt16(ip).ToString("x"); else X_Ip += Convert.ToInt16(ip).ToString("x");}//将十六进制数转换成十进制数long N_Ip = long.Parse(X_Ip, System.Globalization.NumberStyles.HexNumber);IpDataIf ipdataIf = new IpDataIf();ipdataIf.Iplong = N_Ip;if (ipdataIf.Ifxm == 1) //string.IndexOf(){//Response.Write("<script language='javascript'>alert('YO YO!')</script>");//跳转URL，终止当前页Response.Redirect("http://www.google.com/",true); }else{//Response.Write("<script language='javascript'>alert('YO YO!')</script>");Response.Redirect("Default.aspx"); }}}}public class IpDataIf{//数据库连接串public static string constr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=IP.mdb;Jet OLEDB:Database Password=admin";private static long iplong;public long Iplong{get { return iplong; }set { iplong = value; }}public int ifxm;public int Ifxm{get{string sql = "select ifxm from address where '" + this.Iplong + "'>=ip1 and '" + this.Iplong + "'<= ip2";ifxm = this.getcount(sql);return ifxm;}}返回受影响的行数/第一行第一列结果} 
