最近看了《Beginning C# Web Applications Wtith Visual Studio .Net 》。感覺這本書在一些細節方面寫的不錯,特做筆記,為後來者提供一些或許有用的東東。今天先寫出來一些,年前正確整理完。
當前日期:
Lbll.Text = DateTime.Now.ToLongDataString();
This.controls.Add(lbl);
URL:
HyperLink reg = new HyperLink();
Reg.Text = “Register;
Reg.NavigateUrl = Context.Request.ApplicationPath + “Myfirst.aspx”;
判斷使用者授權:
Context.User.Identity.IsAuthenticated;
表格相關:
1. 建立一圖片img
2. img添加到cell
3. cell添加到row
4. row添加到Table
5. Table添加到PlaceHolder
Table tb = new Table(); TableRow row = new TableRow(); Image img = new Image(); img.ImageUrl = "Images/winbook.gif"; img.ImageAlign = ImageAlign.Middle; img.Width = new Unit(24, UnitType.Pixel); img.Height = new Unit(24, UnitType.Pixel); cell = new TableCell(); cell.Controls.Add(img); row.Cells.Add(cell); HyperLink lnk = new HyperLink(); lnk.Text = "News"; lnk.NavigateUrl = "News.aspx"; row.Cells.Add(cell); tb.Rows.Add(row); phNav.Controls.Add(tb);
將已驗證身份的使用者重新導向回最初請求的URL
public static void RedirectFromLoginPage(string userName,bool createPersistentCookie);
參數
userName
用於 Cookie 身分識別驗證的使用者名稱稱。這不需要映射到帳戶名稱,並將由 URL 身分識別驗證使用。
createPersistentCookie
指定是否應當發出持久性 Cookie(跨瀏覽器會話儲存的 Cookie)。
標準資料庫操作1
String sql; SqlCommand cmd; SqlConnection conn; Sql = “insert into …”; conn = new SqlConnection (“data source = (local); initial catalog = caoxicao;userid = sa”); cmd = new SqlCommand (sql,conn); conn.open(); cmd.ExecuteNonQuery();
標準資料庫操作2
SqlConnection conn; SqlCommand cmd; SqlDataReader reader; string sql; sql = “select * from TableName”; conn = new SqlConnection (“data source = (local); initial catalog = caoxicao;userid = sa”) cmd = new SqlCommand(sql,conn); conn.open(); reader = cmd.ExecuteReader();
可以用reader的Read()方法判斷是否真的返回了值
If (reader.Read()) ...{ This.Email.Text = reader[“Email”].ToString(); } DataSet 基本操作 DataSet dsCaoxicao; String sql; SqlConnection conn; SqlDataAdapter adPlaces; conn = new SqlConnection (“data source = (local); initial catalog = caoxicao;userid = sa”) adPlaces = new SqlDataAdapter(sql,conn); dsCaoxiCao = new DataSet(); conn.Open(); adPlaces.Fill(dsCaoxiCao,”Places”);