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;
}
}
///
/// Verifies the login and password that were given
///
/// the login
/// the password
/// returns the login id
/// returns the login type
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();
sqlCommand.Connection = sqlConnection;
}
///
/// Access to our sql command
///
protected SqlCommand Command
{
get { return sqlCommand; }
}
///
/// Access to our data adapter
///
protected SqlDataAdapter Adapter
{
get { return sqlDataAdapter; }
}
///
/// Makes sure that everything is clear and ready for a new query
///
protected void ResetSql()
{
if(sqlCommand != null)
{
sqlCommand = new SqlCommand();
sqlCommand.Connection = sqlConnection;
}
if(sqlDataAdapter != null)
sqlDataAdapter = new SqlDataAdapter();
if(sqlDataSet != null)
sqlDataSet = new DataSet();
}
///
/// Runs our command and returns the dataset
///
///
protected DataSet RunQuery()
{
sqlDataAdapter.SelectCommand = Command;
sqlConnection.Open();
sqlConnection.Close();
sqlDataAdapter.Fill(sqlDataSet);
return sqlDataSet;
}
}
}
http://blog.csdn.net/tielu0144/archive/2007/02/05/1502894.aspx
