在ASP.NET中创建安全的web站点（配置）

<asp:textbox id="password" Runat="server"
Width="120" TextMode="Password">
</asp:textbox>
</td>
</tr>
<tr>
<td vAlign="top" align="left">
<asp:checkbox id="saveLogin" Runat="server"
Text="<b>Save my login</b>">
</asp:checkbox>
</td>
</tr>
<tr>
<td vAlign="top" align="right">
<asp:imagebutton id="btnLogin" Runat="server"
ImageUrl="/images/w2k/login/btnLogin.gif">
</asp:imagebutton>
</td>
</tr>
</table>
</form>
</body>
</HTML>

界面做好之后，就开始编写提交按钮事件，首先需要注册该事件，代码如下：

private void InitializeComponent()
{
this.btnLogin.Click = new System.Web.UI.ImageClickEventHandler(this.btnLogin_Click);
.
.
.
}
事件注册好之后，自然就是编写事件处理函数了：

private void btnLogin_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
CCommonDB sql = new CCommonDB();
string redirect = "";

if((redirect = sql.AuthenticateUser(this.Session, this.Response,
username.Text, password.Text, saveLogin.Checked)) != string.Empty)
{
// Redirect the user
Response.Redirect(redirect);
}
else
{
Message.Text = "Login Failed!";
}
}
读者看完上面的代码之后一定想问CCommonDB是哪里来的东东，这是我编写的一个类，用来处理用户登录信息的，如果成功则把相关信息写入session、Cookie和SQL数据库，同时跳到default.aspx页面。具体如下：

CCommonDB.cs

namespace secure.Components
{
public class CCommonDB : CSql
{
public CCommonDB() : base() { }

public string AuthenticateUser(
System.Web.SessionState.HttpSessionState objSession, // Session Variable
System.Web.HttpResponse objResponse, // Response Variable
string email, // Login
string password, // Password
bool bPersist // Persist login
)
{
int nLoginID = 0;
int nLoginType = 0;

// Log the user in
Login(email, password, ref nLoginID, ref nLoginType);

if(nLoginID != 0) // Success
{
// Log the user in
System.Web.Security.FormsAuthentication.SetAuthCookie(nLoginID.ToString(), bPersist);

// Set the session varaibles
objSession["loginID"] = nLoginID.ToString();
objSession["loginType"] = nLoginType.ToString();

// Set cookie information incase they made it persistant
System.Web.HttpCookie wrapperCookie = new System.Web.HttpCookie("wrapper");
wrapperCookie.Value = objSession["wrapper"].ToString();
wrapperCookie.Expires = DateTime.Now.AddDays(30);

System.Web.HttpCookie lgnTypeCookie = new System.Web.HttpCookie("loginType");
lgnTypeCookie.Value = objSession["loginType"].ToString();
lgnTypeCookie.Expires = DateTime.Now.AddDays(30);

// Add the cookie to the response
objResponse.Cookies.Add(wrapperCookie);
objResponse.Cookies.Add(lgnTypeCookie);

return "/candidate/default.aspx";
}
case 1: // Admin Login
{
return "/admin/default.aspx";
}
case 2: // Reporting Login
{
return "/reports/default.aspx";
}
default:
{
return string.Empty;
}
}
}
else
{
return string.Empty;
}
}

/// <summary>
/// Verifies the login and password that were given
/// </summary>
/// <param name="email">the login</param>
/// <param name="password">the password</param>
/// <param name="nLoginID">returns the login id</param>
/// <param name="nLoginType">returns the login type</param>
public void Login(string email, string password, ref int nLoginID, ref int nLoginType)
{
ResetSql();

DataSet ds = new DataSet();

// Set our parameters
SqlParameter paramLogin = new SqlParameter("@username", SqlDbType.VarChar, 100);
paramLogin.Value = email;

SqlParameter paramPassword = new SqlParameter("@password", SqlDbType.VarChar, 20);
paramPassword.Value = password;

Command.CommandType = CommandType.StoredProcedure;
Command.CommandText = "glbl_Login";
Command.Parameters.Add(paramLogin);
Command.Parameters.Add(paramPassword);

Adapter.TableMappings.Add("Table", "Login");
Adapter.SelectCommand = Command;
Adapter.Fill(ds);

if(ds.Tables.Count != 0)
{
DataRow row = ds.Tables[0].Rows[0];

// Get the login id and the login type
nLoginID = Convert.ToInt32(row["Login_ID"].ToString());
nLoginType = Convert.ToInt32(row["Login_Type"].ToString());
}
else
{
nLoginID = 0;
nLoginType = 0;
}
}
}

abstract public class CSql
{
private SqlConnection sqlConnection; // Connection string
private SqlCommand sqlCommand; // Command
private SqlDataAdapter sqlDataAdapter; // Data Adapter
private DataSet sqlDataSet; // Data Set

public CSql()
{
sqlConnection = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionString"]);
sqlCommand = new SqlCommand();
sqlDataAdapter = new SqlDataAdapter();
sqlDataSet = new DataSet();

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