ASP.NET 三层结构

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在页面上建用户名和密码的文本框,登录按钮-----------------------Login.aspx.csCODE:protected void Submit_Click(object sender, EventArgs e) { DataAccess.Class1 dac = new DataAccess.Class1(); if (dac.CheckLogin(this.UName.Text, this.pwd.Text)) //Response.Write("Success!"); //Response.Redirect("Default.aspx?"); Server.Transfer("Default.aspx"); else Response.Write("Failed!"); //Server.Transfer("Login.aspx"); }----------------------------------------------------Default.aspx在页面上建GridView,要写内容到数据库的文本框和按钮-------------------------Default.aspx.csCODE:protected void Page_Load(object sender, EventArgs e) { if(!IsPostBack) { BindData(); } } public void BindData() {//51aspx.com DataAccess.Class1 dac = new DataAccess.Class1(); DataSet ds = dac.getUsers(); this.GridView1.DataSource = ds.Tables[0].DefaultView; this.GridView1.DataBind(); } protected void Button1_Click(object sender, EventArgs e) { DataAccess.Class1 dac = new DataAccess.Class1(); DataSet ds = dac.getUsers(); DataRow dr = ds.Tables[0].NewRow(); dr["UsersName"] = this.TextBox1.Text; dr["Passwords"] = this.TextBox2.Text; dr["BlogName"] = this.TextBox3.Text; ds.Tables[0].Rows.Add(dr); dac.updataBystoredprocedure(ds); BindData();//51aspx.com }-------------------------------------------------------------Common类库:CODE: //cn public const string C; //Sql public const string Sql_getUser = "select * from Users"; //Table public const string table_Users = "Users"; //StoredProcedure public const string StoredProcedure_insert = "insertUsers";-------------------------------------------------------------------DataAccess类库(数据层):CODE: SqlConnection cn = new SqlConnection(Common.Class1.ConnectString); SqlDataAdapter da; DataSet ds=new DataSet(); //gettable public DataSet getUsers() { SqlCommand cmd = new SqlCommand(Common.Class1.Sql_getUser,cn); da = new SqlDataAdapter(cmd); da.Fill(ds,Common.Class1.table_Users); return ds; } //Login public bool CheckLogin(string name, string pwd) { try { SqlCommand cmd = new SqlCommand("select count(*) from Users where UsersName='" + name + "'and Passwords='" + pwd + "'", cn); cn.Open(); int count = -1; count = Convert.ToInt32(cmd.ExecuteScalar()); if (count < 1) return false; return true; } catch (Exception ex) { return false; } } //textbox updata public void updata(DataSet ds) { SqlCommand cmd = new SqlCommand("insert into Users(UsersName,Passwords,BlogName)valuse(@UsersName,@Passwords,@BlogName)", cn); cmd.Parameters.Add("@UsersName",SqlDbType.VarChar,20,"UsersName"); cmd.Parameters.Add("@Passwords", SqlDbType.VarChar, 50, "Passwords"); cmd.Parameters.Add("@BlogName", SqlDbType.VarChar, 20, "BlogName"); da=new SqlDataAdapter (); da.InsertCommand=cmd; cn.Open(); da.Update(ds,Common.Class1.table_Users); cn.Close(); } //stroedprocedure updata public void updataBystoredprocedure(DataSet ds) { SqlCommand cmd = new SqlCommand(Common.Class1.StoredProcedure_insert,cn); cmd.Parameters.Add("@UsersName",SqlDbType.VarChar,20,"UsersName"); cmd.Parameters.Add("@Passwords", SqlDbType.VarChar, 50, "Passwords"); cmd.Parameters.Add("@BlogName", SqlDbType.VarChar, 20, "BlogName"); cmd.CommandType = CommandType.StoredProcedure; da=new SqlDataAdapter(); da.InsertCommand=cmd; cn.Open(); da.Update(ds,Common.Class1.table_Users); cn.Close(); }