C＃Web应用程序入门典范笔记（上册）【C#.Net教程】,C＃Web

近来看了《Beginning C# Web Applications Wtith Visual Studio .Net 》。觉得这本书在一些细节方面写的不错，特做笔记，为后来者供应一些也许有效的东东。本日先写出来一些，年前准确整理完。

当前日期：

Lbll.Text = DateTime.Now.ToLongDataString();
This.controls.Add(lbl);
URL:
HyperLink reg = new HyperLink();
Reg.Text = “Register;
Reg.NavigateUrl = Context.Request.ApplicationPath + “Myfirst.aspx”;

推断用户受权:

Context.User.Identity.IsAuthenticated;

表格相干：

1. 新建一图片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);

将已考证身份的用户重定向回最初要求的URL

public static void RedirectFromLoginPage(string userName,bool createPersistentCookie);

参数
userName
用于 Cookie 身份考证的用户称号。这不须要映照到帐户称号，并将由 URL 身份考证运用。
createPersistentCookie
指定是不是应该发出持久性 Cookie（跨浏览器会话保留的 Cookie）。

规范数据库操纵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();

规范数据库操纵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()要领推断是不是真的返回了值

If (reader.Read()) 
...{ 
     This.Email.Text = reader[“Email”].ToString(); 
} 
DataSet 基础操纵 
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”);

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