I. asp+
a. asp+ vs. asp
| asp.net/asp+ : - a unifd web dev platform providg services necessary for enterprise-class web apps [msdn]; a prog framewk built on the CLR usable on server to build powerful web apps. |
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WinForms | ||
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| .net code |-----> | dll (in MSIL) | -------> | CLR |
compiled assembly compile to native code
+ execs
Machine.config:
<processModel enable="true" timeout="Infinite" {restart}
shutDownTimeOut="00:00:05" {terminate proc after this time}
requestLimit="Infinite"
memoryLimit="95" {phys.mem. toconsume before proc restarted}
responseRestartDeadlockInterval="00:03:00" {time to wait before restartg deadlocked proc}
responseDeadlockInterval="00:03:00"
requestQueueLimit="5000" {no. queued requests allowed before 503 (server too busy) returned};
clientConnectedCheck="0:00:05" {chk if clt connected}
maxWorkerThreads="25" {max thrds / processor} maxIOThreads="25">
c. Directives
d. Built-in Objects
II. Web Forms (System.Web.UI) Web Form = cross html page + Winform; define UI of web app., but unlike WinForms run on webserver.
a. Categories of Webforms
| Feature | WebForms | WinForms |
| Tools | cant use Win ctrls | WinForms |
| UI | browser-depdt | - |
| Lifetime | sent to browser + discarded | exist aslong as requd |
| Executn | exec pts reside on webserver | - |
| web forms : - scalable server-side CLR prog model to dynamically generate web pages; for UI of web aps, uses RAD (rapid app. dev.); .aspx extension |
| feature | server ctrl | html ctrl |
| server evts | cantrigger | only page-level evts on server (postback) |
| state mgt | maintained across requests | not maintained, mustbe stored |
| adaptn | auto-detect browser + display adaptn | no auto-adaptn |
| props | more than html | html attribs |
b. Server Controls
<%@ Page Language="C#" AutoEventWireup="True" %> <html> <head> ... <table id="myTable" Border="1" BorderColor="black" runat="server"> ... <script runat="server"> myTable.BgColor = aselect.Value; myTable.Border = Convert.ToInt32(bselect.Value); myTable.BorderColor = cselect.Value; </script>
<style> .myStyle{...} </style> ...
<script language="C#" runat="server"> myaspid.CssClass = myStyle; </script>
<form><asp:Label id="xLabel" Font-Name="Verdana" Font-Names="Verdana, Courier" Font-Size="10pt" Font-Bold="true" Font-Italic="true" Font-Underline="true" Font-Strikeout="false" Text="myText" runat="server/> </form> ... myLabel.Font.Underline = false; myLabel.Font.Bold= false;
<asp:Image id="id_Image" runat="server"
AlternateText="txt" {used by XP Narrator + accessibility sw}
ImageUrl="f.jpg"
ImageAlign="NotSet|Left|Right|BaseLine|Top|Middle|
Bottom|AbsBottom|AbsMiddle|TextTop" /> ...
xImage.ImageAlign = ImageAlign.Right;
Label l = new Label(); l.BorderStyle = BorderStyle.Solid; l.Text = "This is a new Label"; Page.Controls.Add(l);
<asp:Panel id="xPanel" runat="server" BackColor="gainsboro"
HorizontalAlign="Center" Height="200px" Width="300px"> ...
xPanel.Visible=false; xPanel.Controls.Add(b);
xPanel.Visible = oCheckBox.Checked;
xPanel.Controls.Add(new LiteralControl("<br>"));
<asp:RadioButton id=rb1 Text="a" Checked="True" GroupName="xgroup" runat="server" /> <asp:RadioButton id=rb2 Text="b" GroupName="xgroup" runat="server"/> ... if (rb1.Checked) ...
<asp:Table id="xTable" CellPadding=10 GridLines="Horizontal | Vertical | Both"
CellPadding="3" CellSpacing="3" BackImageUrl="f.jpg"
BackColor="green" {inherits from WebControl}
BorderStyle="Dotted" BorderWidth="2" runat="server">
<asp:TableRow>
<asp:TableCell Text="(0,0)"> Row 0, Col 0 </asp:TableCell>
<asp:TableCell> Row 0, Col 1 </asp:TableCell>
</asp:TableRow>
<asp:Table> ...
MyTable.Rows[0].Cells[0].Text = "cell 1";
MyTable.Rows[1].Cells[1].Text = "cell 1"; ...
TableRow tr = new TableRow(); TableCell tc = new TableCell();
oTableRow.Cells.Add(oTableCell); // cells collectn
oTable.Rows.Add(oTableRow); // rows collectn
TableItemStyle MyTableItemStyle = new TableItemStyle();
MyTableItemStyle.HorizontalAlign = HorizontalAlign.Center;
MyTableItemStyle.VerticalAlign = VerticalAlign.Middle;
MyTableItemStyle.Width = Unit.Pixel(100);
<asp:TextBox ID="id_TextBox" Rows="2" {ignored unless TextMode=MultiLine}
Columns="2" MaxLength="3" {max.no.chars}
ReadOnly="true" {unchangeable txt} Wrap="true" {multi-line?} Text="txt"
TextMode="SingleLine {deflt} | MultiLine | Password"
OnTextChanged="f" runat="server"/>
... int i = Convert.ToInt32(id_TextBox.Text);
int i = int.Parse(args.Value);
id_TextBox.Text = "string"; // get/set data
<script language="C#" runat="server">
void f(Object o_sender, EventArgs e) { ... } </script>
1.cmd btn:
<asp:Button id="id_Button" Text="Sort" CommandName="xc"
CommandArgument="xcarg" OnCommand="f" runat="server"/> ...
void f(Object o, CommandEventArgs e)
{ switch(e.Commandname)
{ case "xc": ... if((string)e.CommandArgument == "xcarg") ... break;
case "mySubmit": ... break;
default: ... break; } }
2.submit btn: OnClick = serverside evt
<asp:Button id="xid" Text="submit" OnClick="f" runat="server"/>
<asp:ImageButton id="id_ImageButton" runat="server" AlternateText="atxt"
ImageAlign="left" ImageUrl="f.jpg" OnClick="f"/>
<asp:ImageButton id="bImageButton" runat="server"
AlternateText="btxt" ImageUrl="f.jpg" OnCommand="f"
CommandName="xcmd" CommandArgument="Ascending"/>/> ...
void f(object o_sender, CommandEventArgs e)
{ if (e.CommandName == "Sort") ...
if (e.CommandName == "Sort" && e.CommandArgument.ToString() == "Ascending") ...
Console.WriteLine("x: " + e.X.ToString() + "y: " + e.Y.ToString()); } ...
void f(object o_sender, ImageClickEventArgs e) // just EventArgs for other 2 buttons
{ ... e.X ... e.Y ... } // coords
<asp:CheckBoxList id="myid" AutoPostBack="True" CellPadding="5" CellSpacing="5" RepeatColumns=2 RepeatDirection="Vertical" RepeatLayout="True" TextAlign="Right" OnSelectedIndexChanged="f" runat="server>> <asp:ListItem> Item 1 </asp:ListItem> <asp:ListItem> Item 2 </asp:ListItem> </asp:CheckBoxList>
<asp:DataList id="xDataList" BorderColor="black" CellPadding="5"
CellSpacing="5" RepeatDirection="Vertical" RepeatLayout="Table"
RepeatColumns="3" {no.cols.} ShowBorder="True" runat="server">
<HeaderStyle BackColor="#aaaadd"> </HeaderStyle>
<AlternatingItemStyle BackColor="Gainsboro"></AlternatingItemStyle>
<HeaderTemplate> List of items </HeaderTemplate>
<ItemTemplate>
Description: <%# DataBinder.Eval(Container.DataItem, "StringValue") %>
Price: <%# DataBinder.Eval(Container.DataItem, "CurrencyValue", "{0:c}") %>
<asp:Image id="ProductImage"
ImageUrl='<%# DataBinder.Eval(Container.DataItem, "ImageValue") %>'
runat="server"/>
</ItemTemplate>
</asp:DataList>
...
xDataList.DataSource = CreateDataSource();
xDataList.DataBind();
<asp:DropDownList id="xDropDownList" AutoPostBack="True"
OnSelectedIndexChanged="f_sic" runat="server">
<asp:ListItem Selected="True" Value="White"> White </asp:ListItem>
<asp:ListItem Value="Silver"> Silver </asp:ListItem>
</asp:DropDownList> ... void f_sic(Object sender, EventArgs e) { ... }
aDropDownList.Items.Add("txt");
<asp:ListBox id="xListBox" Rows="6" Width="100px" runat="server"
SelectionMode="Single|Multiple" onSelectedIndexChanged="f" AutoPostBack="true">
<asp:ListItem Selected="True">Item 1 </asp:ListItem>
<asp:ListItem>Item 2 </asp:ListItem>
<asp:ListItem>Item 3 </asp:ListItem>
</asp:ListBox> ...
xListBox.SelectionMode = ListSelectionMode.Multiple;
xListBox.Items.Add(aTextBox.Text);
... xListBox.SelectedItem.Text; { rets ListItem | null }
<asp:RadioButtonList id=oRadioButtonList runat="server">
<asp:ListItem>Item 1 </asp:ListItem> <asp:ListItem>Item 2 </asp:ListItem>
</asp:RadioButtonList> ...
oRadioButtonList.RepeatDirection = RepeatDirection.Horizontal;
oRadioButtonList.RepeatLayout = RepeatLayout.Flow | Table;
oRadioButtonList.SelectedIndex {which butt checked}
... foreach (ListItem xListItem in oRadioButtonList.Items)
{ if(oListItem.Selected) { ... oListItem.Text ... }
<asp:Repeater id=aRepeater runat="server">
<HeaderTemplate><table><tr><td> col1 <td> col2 </td></tr></HeaderTemplate>
<ItemTemplate>
<tr><td> <%# DataBinder.Eval(Container.DataItem, "Name") %> </td>
<td> <%# DataBinder.Eval(Container.DataItem, "Ticker") %> </td></tr>
</ItemTemplate>
<FooterTemplate> </table> </FooterTemplate>
</asp:Repeater>
... Page_Load(){
MyDataAdapter.Fill(oDataSet);
oDataGrid.DataBind(); }
<asp:DataGrid id="xDataGrid" BorderColor="black" BorderWidth="1"
CellPadding="3" AutoGenerateColumns="true" runat="server">
<HeaderStyle BackColor="#00aaaa"></HeaderStyle>
<FooterStyle BackColor="#00aaaa"></FooterStyle>
<Columns>
<asp:BoundColumn HeaderText="Item" DataField="StringValue"/>
<asp:BoundColumn HeaderText="Number" DataField="IntegerValue">
<ItemStyle BackColor="yellow"></ItemStyle>
</Columns>
</asp:DataGrid> ...
DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("IntegerValue|StringValue|CurrencyValue",
typeof(Int32|string|double)));
DataRow dr;
for(...) dr = dt.NewRow(); dr[0] = i; dt.Rows.Add(dr);
DataView dv = new DataView(dt); ...
xDataGrid.DataSource = CreateDataSource();
xDataGrid.DataBind();
<form runat="server">
<asp:Calendar id="myCalendar" runat="server" SelectionMode="DayWeekMonth"
ShowGridLines="false" {deflt booleans shown} ShowDayHeader="true" {d of w: mon, ...}
ShowNextPrevMonth="true" {goto next/prev m} ShowTitle="true" {n of mon.}
OnPreRender="f_pr" {fired 1x before entire cal sent to html strm}
OnDayRender="f_dr" {fired as each d rendered}
OnSelectionChanged="f_osc" {if selectd d/w/m changed}
OnVisibleMonthChanged="f_vmc"/> {new m selectd}
<TitleStyle BackColor="Blue" ForeColor="White" Font-Bold="True"></TitleStyle>
<DayStyle ...> {dts in shown m} <DayHeaderStyle ...> {mon, tue...}
<TodayDayStyle ...> <SelectedDayStyle ...>
<OtherMonthDayStyle ...> {dts noton shown m} <WeekendDayStyle ...>
<SelectorStyle ...> {wk+m dt seln col.} <NextPrevStyle ..> {navign ctrls}
</asp:Calendar>
</form> ...
myCalendar.SelectionMode = CalendarSelectionMode.DayWeekMonth;
myCalendar.ShowNextPrevMonth = false; ...
f_DayRender(Object o, DayRenderEventArgs e)
{ // addg dropdown list to calendar cell
aDropDownList.Items.Add("vacation");
aDropDownList.Items.Add("vacation");
e.Cell.Controls.Add(aDropDownList); }
<asp:AdRotator id="xid" runat="server" Target="_self" AdvertisementFile="xAdFile.xml"/>
xAdFile.xml:
<Advertisements>
<Ad>
<ImageUrl> f.jpg </ImageUrl>
<NavigateUrl> http://www.ebay.com </NavigateUrl>
<AlternateText> ebay.com: alt attrib of img </AlternateText>
<Keyword> auction </Keyword>
<Impressions> 80 </Impressions>
</Ad>
</Advertisements>
<asp:CompareValidator id="myCompareValidator" ControlToValidate="textbox1" ControlToCompare="textbox2" EnableClientScript="False" Type="String|Integer|Double|Date|Currency" runat="server"/> ... myCompareValidator.Validate();
<asp:CustomValidator id="xid" ControlToValidate="xtextbox" Display="Static"
OnServerValidate="f_s" {serverside validn}
ClientValidationFunction="f.js | vb" {clt-side validn}
ErrorMessage="uneven nu." {detailed descriptn of error}
Text="error" {brief error msg} runat="server"/>
... f(object o_src, ServerValidateEventArgs e) ...
<asp:RangeValidator id="myRV" ControlToValidate="aTextBox" MinimumValue="1" MaximumValue="10" EnableClientScript="false" Text="mustbe 1 to 10" Type="Integer|Double|String|Date|Currency" runat="server"/> ... if (Page.IsValid) ...
<asp:RegularExpressionValidator id="myREV" ControlToValidate="aTextBox"
ValidationExpression="\d{5}" Display="Static" ErrorMessage="mustbe 5 digits"
EnableClientScript="False" runat="server"/>
... if (Page.IsValid) ...
<asp:RequiredFieldValidator id="id_RFV" ControlToValidate="aTextBox"
InitialValue="Deflt Value" Text="in" {shown in ctrl}
Display="Static" ErrorMessage="error" runat="server"/> ... if (Page.IsValid) ...
<asp:PlaceHolder id="id_PlaceHolder" runat="server"/> ... id_PlaceHolder.Controls.Add(myButton);
namespace aNamespace {
[ToolboxData("<{0}:MyCustomCtrl Text='txt' BackColor='White'
ForeColor='Blue' WarnLevel='0' runat='server'>")]
public class MyCustomCtrl ... // deflt props of custom ctrl
<@Register TagPrefix="MyTagPrefix" namespace="aNamespace"
assembly="MyAssembly" %> {uses MyAssembly.dll ass containg MyCustomCtrl}
<MyTagPrefix:MyCustomCtrl id="MyCustomCtrl1" Text="txt" BackColor="Color.White"
ForeColor="Blue" WarnLevel="0" OnMyEvent="f" runat="server" /> {madeby vs}
<asp:Xml id="id_Xml" runat="server" /> ...
XmlDocument xdoc = new XmlDocument(); xdoc.Load(Server.MapPath("f.xml"));
XslTransform xtrans = new XslTransform(); xtrans.Load(Server.MapPath("f.xsl"));
aXml.Document = doc; aXml.Transform = trans;
c. Custom Controls
[DefaultEvent("Click")] // deflt evt on dbl-click
public class CompositeCustomCtrl : WebControl
{... protected override void CreateChildControls()
{ Controls.Add(new LiteralControl( ">br> hello" ));
MyButton.Click += new EventHandler(f_click); } ...
EnsureChildControls();
}
public class RenderedCustomCtrl : WebControl
{ // 1. render
protected override void Render(HtmlTextWriter htw)
{ htw.Write("<h3> Rendered </h3>");
htw.WriteBeginTag("INPUT"):
htw.WriteAttribute("type", "button");
htw.WriteAttribute("onclick","javascript:alert('!')");
htw.WriteEndTag("INPUT");
... // 2. or create html attribs in any sequence
htw.RenderBeginTag("INPUT"); // insert <INPUT
htw.RenderEndTag(); // insert >
}
}
<CustCtrl:MyControl ForeColor="Color.Red" runat="server">
public int ForeColor
{ get { return myTextBox.ForeColor; }
set { myTextBox.ForeColor = Value; } }
a. ado.net layers
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RDO (Remote Data Objects): ms api usg ms lower-layer DAO (Data Access Objs) for relational db (not non-relational) access; llimited use as as objs couldnt be marshalled across net. evolved into ADO (ActiveX Data Objects). [searchDatabase.com] ADO (ActiveX Data Objects): OO ms api for db access to relational and non-relational db. improved support for disconnected db; a disconnected recordset can marshall over n/w. pt of Universal Data Access strategy: provide universal access to various kds of db rather than buildg universal db. (oracle) ADO.net (not ActiveX Data Objects): "the data access model for .NET-based applications" [mackman 2003]; a disconnected and distributed data access technology based on XML, largely indepdt of data src. |
_____ _____________ / \---------> ( Data Provider ) |\______/| ( Connection ) | | -------------- | Data | | | Store | | | | da.Update() ------------ da.Fill(ds)-------- / | |<---------- ( DataAdapter ) -------->|DataSet|--------> Data View -< | | ( _________ ) | | \ \______/ --------
|
Additional classes:
| Object | Description |
|---|---|
| CommandBuilder | A helper object that will automatically generate command properties of a DataAdapter or will derive parameter information from a stored procedure and populate the Parameters collection of a Command object. |
| Parameter | Defines input, output, and return value parameters for commands and stored procedures. |
| Exception | Returned when an error is encountered at the data source. For an error encountered at the client, .NET Framework data providers throw a .NET Framework exception. |
| Error | Exposes the information from a warning or error returned by a data source. |
| ClientPermission | Provided for .NET Framework data provider code access security attributes. |
xDataSet.Tables["aTable"].Columns["aColumn"}.Caption = "@Home"; // untyped refs xDataSet,aTable.aColumn.Caption = "@Home"; // typed refs(old ado: only untyped refs to data objs)
Web.config: <configuration> <appSettings> <add key=SQLConnection value="conn string"> </appSettings> <configuration>
b. System.Data
Sql | OracleConnection MyConnection = new
SqlConnection("server=(local);"+"database=tbl; Trusted_Connection=yes");
SqlCommand MyCommand = new SqlCommand("SELECT col1, col2 FROM aTable",MyConnection);
MyConnection.Open();
Sql | OracleDataReader MyDataReader = MyCommand.ExecuteReader();
while(MyDataReader.Read())
{ foreach(object item in items)...
myReader.GetInt32(0); myReader.GetString(1) .. }
Sql | OracleConnection MyConnection = new // 1. create conn obj
SqlConnection("server=(local);"+"database=tbl; Trusted_Connection=yes");
SqlDataAdapter MyDataAdapter = // 2. create data adapter
new SqlDataAdaper("select * from oTable", MyConnection);
// or new SqlDataAdapter("SELECT * FROM aTable",
// "server=(local); database=aTable; Trusted_Connection=yes");
DataSet oDataSet = new DataSet(); // 3. create data set
MyDataAdapter.Fill(oDataSet)
| (ds,"tbl"); // 4. fill/update data set
oDataGrid.DataSource = oDataSet.Tables["tbl"].DefaultView;
oDataGrid.DataBind(); // 5. show data from dataset usg say data bindg
SqlDataReader myReader = myCommand.ExecuteReader();
if (myReader.HasRows){ while (myReader.Read()) {
Console.WriteLine("\t{0}\t{1}", myReader.GetInt32(0), myReader.GetString(1)); } }
myReader.Close();
... this.PreRender += new EventHandler(f_PreRender); ... // after all ctrl
// evts processed
public void f_PreRender(object o_sender, EventArgs e)
{ MySqlAdapter.Update(MyDataSet); aDataGrid.DataBind(); }
// Data adapter, combines sql cmd + connectn string
oDataAdapter.Fill(oDataTable);
oDataAdapter.SelectCommand.CommandText =
"SELECT * FROM bTable"; // change adapter's SELECT cmd
DataSet aDataSet = new DataSet("xxx");
aDataSet.Tables.Add(aDataTable);
aDataSet.Tables.Add(bDataTable); // add both tbls to dataset
aDropDownList.DataBind():
aDataSet.Tables[".."].DefaultView.RowFilter = "conctactId=" +
aDropDownList.SelectedItem.Value.ToString();
<asp:DropDownList id="aDropDownList" runat="server" DataSource="<%# aDataSet %>" DataTextField='aName' DataValueField="aValue"></asp:DropDownList> ... aSqlDataAdapter.Fill(aDataSet); aDropDownList.DataBind(); ...
DataColumn dc1 = myDataSet.Tables["aTable"].Columns["SameCol"]; DataColumn dc2 = myDataSet.Tables["cTable"].Columns["SameCol"]; ForeignKeyConstraint fkc = new ForeignKeyConstraint["oTable",dc1,dc2]; fkc.UpdateRule = Rule.Cascade; fkc.DeleteRule = Rule.Cascade; fkc.AcceptRejectRule = AcceptRejectRule.Cascade; myDataSet.Tables["Chemicals"].Constraints.Add[fkc]; myDataSet.EnforceConstraints = true;
DataTableMapping dtm = myDataAdapter.TableMappings.Add("MyMap","aTable");
// create dtm from the data adapter, & add col mappgs to dtm usg Add
dtm.ColumnMappings.Add("newcol","oldcol");
DataSet ds = new DataSet();
myDataAdapter.Fill(ds, "MyMap"); // use dtm instead of DataTable
foreach (DataRow myRow in ds.Tables["aTable"].Rows)
{ string s = myRow["newcol"].ToString(); } // use idx or col name
object o = {"samar","abbas"}; MyDataView.Find(o);
MyDataView.Sort("fname","lname"); MyDataView.Table = ...;
MyDataView.Sort(ocol DESC) {reverse sort, descendg}
SqlCommandBuilder cb = new SqlCommandBuilder(oDataAdapter); // create insert, del, update cmds auto oDataAdapter.Update(oDataTable); // [webb.248]
c. T-SQL
d. Transactions
Transactn: grp of cmds treated as a single unit, all-or-nothg fashion: if 1 cmd failed, all fail + data removed.
MyDataSet.RejectChanges(); // restore DataSet to original state MyDataGrid.DataBind(); ... // refresh the datagrid int i = MyAdapter.Update(MyDataSet); // update db from dataset Session["MyDataSet"] = MyDataSet; // save changes to state var MyDataGrid.DataBind(); // refresh data grid
SqlTransaction MyTrans = MyConnection.BeginTransaaction(); SqlCommand MyCommand = new SqlCommand(); MyCommand.Transaction = MyTrans; MyCommand.CommandText = "..."; MyCommand.ExecuteNonQuery(); MyTrans.Commit(); MyConnection.Close();
try{ MyTransactn.Commit(); }
catch(Exception e) { MyTransactn.Rollback(); } // cancel pendg cmds
finally { MyConnection.Close(); }
Sql|OracleTransaction MyTransaction =
MyConnection.BeginTransaction(IsolationLevel.ReadCommitted);
SqlCommand MyCommand = new SqlCommand("DELETE ...", MyConnection, MyTransaction);
try{ int i_rows = MyCommand.ExecuteNonQuery();
MyTransaction.Commit(); } // commit the transactn
catch{ MyTransaction.Rollback(); }
IV. Security
a. Authenticn & Authorizn (System.Web.Security)
|
<table> ... <span id="MySpan1" runat="server"> ....
private void Page_Load(object o_sender, System.EventArgs ea)
{ MySpan1.InnerText = User.Identity.IsAuthenticated.ToString();
MySpan2.InnerText = User.Identity.Name;
MySpan3.InnerText = User.Identity.AuthenticationType;
if(User.IsInRole("Administrators") ... }
subdir/Web.config:
<authorization><allow roles="MyRole" />
<deny users="*" /></authorization>
<authorization> <allow users="user1, bhost\user2" /> <deny users="user3, user4" /> </authorization>
Web.config: {set auth mode}
<authentication mode="Forms | Windows | Passport">
<forms loginUrl="f.aspx"> {if no valid cookies found}
<credentials passwordFormat="SHA1 | MD5 | Clear">
{user list}
<user name="auser" password="xyz">
<user name="buser" password="xyz">
</credentials>
</forms>
</authentication>
using System.Web.Security; ...
// chk against <credentials>
f_login(object o_sender, EventArgs ea)
{ if (FormsAuthentication.Authenticate(user_TextBox.Text, passwd_TextBox.Text))
{ FormsAuthentication.RedirectFromLoginPage(user_TextBox.Text, true); }
else{ Resonse.Redirect("denied.htm"); ...} ... }
f_logout(object o_sender, EventArgs ea)
{ FormsAuthentication.SignOut();
Response.Redirect("login.aspx"); }
protected void PassportAuthentication_OnAuthenticate(Object o_sender,
PassportAuthenticationEventArgs ea)
{ if (ea.Identity.IsAuthenticated) ...
ea.Identity["FirstName" | "LastName" | "City" | "PreferredEmail" ];
}
Web.config:
<configuration>
<system.web>
<identity impersonate="true">
{ or: identity impersonate="true" username="Administrator" password="xyz">}
</system.web>
</configuration>
System.Security.Principal.WindowsIdentity.GetCurrent().Name
tosee impersonated winuser id.
b. Session Mgt, State Mgt & Client-Side Scriptg
HttpCookie MyHttpCookie = new HttpCookie("a string",
System.Guid.NewGuid().ToString(); // ?error
if(Request.Browser.Cookies) // chk if cookies enabled on clt
{ HttpCookie aHttpCookie = new HttpCookie("cName");
// or = HttpCookie("cName", DateTime.Now.ToString());
// or = Request.Cookies["cName"]; to get cookies
aHttpCookie["aKey"] = "a key"; // use a key within cookie
aHttpCookie["bKey"] = "b key";
aHttpCookie.Value = "English";
aHttpCookie.Expires = DateTime.Now.AddDays(1); // expires tomorrow
Response.Cookies.Add(aHttpCookie); ...
Session["Lang"] = Request.Cookies["cName"].Value;
}
foreach (StateItem Item in ViewState.Values)
{ ... aTableCell.Text = Item.Value.ToString(); ... }
c. Unmanaged Code
Win32 datatype .net sqlserver datatype BSTRS String word Int16 dword Int32 int: 4 bytes (-231)-(231-1)
[DllImport("KERNEL32.DLL", EntryPoint="MoveFile", SetLastError=true,
CharSet=CharSet.Unicode, ExactSpellling=false,
CallingConvention=CallingConvention.StdCall)]
if (MoveFile(...)) { ... } // nonzero if success
else
{ switch( Marshal.GetLastWin32Error() )
{ case 2: s = "file not found"; break;
case 5: s = "access denied"; break; }
}
using System.Runtime.InteropServices // 1. use namespace [webb.355]
// 2. identify unmanaged proc tocall
[DllImport("KERNEL32.DLL", EntryPoint="GetSystemInfo", SetLastError=true,
CharSet=CharSet.Unicode, ExactSpelling=true,
CallingConvention=CalllingConvention.StdCall)]
public static extern void f(ref XSTRUCT xstruct);
// 3. def types for unmgd proc params usg sequential (deflt) layout
[StructLayout(LayoutKind.Sequential)] public struct XSTRUCT
{ ... public Int32 MyDataType ; ... }
// [StructLayout(LayoutKind.Explicit)] public struct XSTRUCT
// { ... [FieldOffset(0)]public Int32 MyDataType ; .. } explicit struct layout
// 4. call unmgd proc
private void Page_Load(object o_sender, System.EventArgs ea)
{ XSTRUCT MyXStruct;
f(ref MyXStruct); ... MyXStruct.MyDaataType; }
d. COM, COM+
[assembly: ComVisible(false)] ...// hide public members from Com by deflt
[ComVisible(true)] public class MyClass : AClass { ... }
e. Client-Side Scripting
System.Web.Mail.MailMessage MyMailMessage = new MailMessage();
MyMailMessage.From = "from@a.com";
MyMailMessage.To = "to@z.com";
MyMailMessage.Subject = "sub line";
MyMailMessage.Body = "msg body";
MailAttachment MyMailAttachment
= new MailAttachment(Server.MapPath(".") + "\\f.jpg");
V. Testing
Automated tests; reproducible, measurable (success/fail)
a. Types of Test
b. Errors & Debugging: Debug & Trace
Debug.Listeners.Add(new TextWriterTraceListener(Console.Out) );
Debug.WriteLine("error");
Debug.Listeners.Add(new TextWriterTraceListener("f.log");
Debug.WriteLine("error");
Debug.Flush(); // wrote o/p to file
EventLog myEventLog = new EventLog();
myEventLog.Source = "mySource";
myEventLog.WriteEntry("a string");
EventLogTraceListener eltl = new EventLogTraceListener("log");
Trace.Listeners.Add(eltl);
Trace.WriteLine(aString);
c. Exception Handlg
Exception = unusual occurrence, = error; dealg with exceptns = exceptn handlg; unhandled exceptns = errors not dealt with in code
public class MyException : System.ApplicationException
{ public MyException() : this("a string", null)
{ ... }
}
private void Page_Error(object o_sender, System.EventArgs ea)
{
Exception e = Server.GetLastError(); // obtain last exceptn
Session["Error"] = e.Message; // store the msg
Server.ClearError(); // handle exceptn st it doesnt trigger error
// evts/appear to user
}
<customErrors mode="RemoteOnly (deflt)| On" defaultRedirect="f.aspx">
{cust errs only to remote clts not on localhost, detailed asp.net
errors on webserver | show cust err pgs on localhost}
<error statusCode="401" redirect="f1.aspx">
<error statusCode="404" redirect="f2.htm">
</customErrors>
c. Help
d. Windows Installer
VI. XML & XSLT
MyDataSet.ReadXml( Server.MapPath(".") + "\\f.xml");
MyDataSet.ReadXmlSchema( Server.MapPath(".") + "\\f.xsd");
... // search for key
DataRow MyDataRow = MyDataSet.Tables["aTable"].Rows.Find(aKey); [webb.351]
VII. Globalization (System.Globalization)
|
Globalizatn = proc of designg + developg applicn supportg
localized UI and regnal data for users in multiple cultures
Localizatn = process of accomodatg cultural differences in an app (currency, calendar, writg dirn, ...) |
Thread.CurrentThread.CurrentCulture =
CultureInfo.CreateSpecificCulture(Request.UserLanguages[0]);
Thread.CurrentThread.CurrentUICulture =
new CultureInfo(Request.UserLanguages[0]); // which sat.assembly toload
protected ResourceManager rm = // create assemblies
new ResourceManager("rootns.resrcbase",typeof(Satellite).Assembly);
where 2nd arg = currt executable assembly.
CultureInfo myCI = new CultureInfo( "es-ES" | 0x040A, false );
Console.Write(" : " + myCI.CompareInfo + myCI.DisplayName +
myCI.EnglishName + myCI.IsNeutralCulture + myCI.IsReadOnly +
myCI.LCID + myCI.Name + myCI.NativeName + myCI.Parent + myCI.TextInfo
myCI.ThreeLetterISOLanguageName + myCI.ThreeLetterWindowsLanguageName +
myCI.TwoLetterISOLanguageName;
foreach ( CultureInfo ci in
CultureInfo.GetCultures( CultureTypes.SpecificCultures ) ) {
if ( ci.TwoLetterISOLanguageName == "zh" ) ...
Console.Write( "0x{0} {1} {2,-37}", ci.LCID.ToString("X4"),
ci.Name, ci.EnglishName );
CultureInfo ci = new CultureInfo("th-TH");
if (ci.Calendar is GregorianCalendar) ... else
Console.WriteLine ("{0} deflt cal:", ci.DisplayName.ToString(),
ci.Calendar.ToString()
for(int i = ci.OptionalCalendars.GetLowerBound(0);
i <=ci.OptionalCalendars.GetUpperBound(0); i++)
Console.WriteLine (ci.OptionalCalendars[i].ToString());
CultureInfo ci = new CultureInfo("ja-JP");
ci.DateTimeFormat.Calendar = new JapaneseCalendar();
DateTime dt = DateTime.Now; Console.WriteLine(""
+ ci.DateTimeFormat.Calendar.GetDayOfMonth(dt) | GetMonth(dt) | GetYear(dt);
+ ci.DisplayName.ToString() + ci.DateTimeFormat.Calendar.ToString() );
VIII. Web Server
a. IIS
b. Performance & Optimization: Caching
Cache.Add(oKey, oValue, oCacheDependancy, oDateTime, oTimeSpan, CacheItemPriority.NotRemoveable | High | AboveNormal | Normal | Default | BelowNormal | Low , onRemoveCallback);
public override string GetVaryByCustomString(HttpContext MyHttpContext,
string arg) {... "astring" ...MyHttpContext.Request.Browser.Browser; ...}
Response.Cache.SetExpires( System.DateTime.Now.AddSeconds(5) ); Response.Cache.VaryByParams["None"] = true; Response.Cache.SetCacheability(HttpCacheability.Public);
[PartialCaching(60)] public class MyCachedCtrl : System.Web.UI.UserControl
c. Building & Deployment: Windows Installer, Xcopy Deployg: installg the app on webserver
IX. XML Web Services (System.Web.Services)
| xml web services : - a compont containg business functnality exposed through internet protocols, enablg apps to exchange info usg http and xml through firewall |