Chapter7

Label server control is used to display text in the browser.. Property: Text: is used set or get value < asp :Label ID =“lblMsg" runat ="server"> String strName=lblMsg.Text; Or lblMsg.T

CHAPTER 7

ASP.NET WEB SERVER

CONTROLS

ASP.Net Web Server Control

Syntax ASP.Net Web Server Control:

<asp:TagName ListAttribute >

You want to format control , you

right-click control->properties

Label server control is used to display text in the

browser

Property:

Text: is used set or get value

< asp :Label ID =“lblMsg" runat ="server"></ asp :Label>

String strName=lblMsg.Text;

Or

lblMsg.Text=“Value”;

Textbox is one of the main feautures of Web page It permit user input data from Client

Property:

TextMode: SingleLine, Password, MultiLine

Text: set or get value

< asp :TextBox ID =“txtName" runat ="server"></ asp :TextBox> String strName=txtName.Text;

Or

txtName.Text=“Value”;

Buttons are the usual element used to submit forms

Property:

Text: set or get value

<asp:Button ID=“btnName" runat="server“

Text=“Caption”></asp:Button>

String strName=btnName.Text;

Or

btnName.Text=“Value”;

ButtonCommandName: permit multiple buttons your form all

working from a single event

<asp:TextBox ID=“btnName" runat="server“

Text=“Caption” CommandName=“cmdName”/>

<asp:Button ID=“btnName" runat="server“

Text=“Caption” OnClientClick=“F_Client()”

OnCommand=“F_Server1” OnClick=“F_Server2”/>

Example Button

< asp :Button ID =“btnSend" runat ="server“ Text =“Send”

OnClientClick =“Greeting()” OnCommand =“Process_Command” CommandName =“cmdSend”/>

< asp :Button ID =“btnUpdate" runat ="server“ Text =“Update”

Checkbox and RadioButton

< asp :CheckBox ID =“chkName" runat ="server“

Text =“Value”/>

< asp :RadioButton ID =“chkName" runat ="server“

Text =“Value”/>

Property :

Text : get or set value

Checked : true or false

AutoPostBack : true or false

Events of Button :

OnCheckedChanged: event are created when user click CheckBox or Radiobutton Control

List Control group

List Control group (cont)

<asp:ListControlName Id=“IdName” runat=“Server”>

< asp : ListItem Value =”value” Text =“text”></ asp :ListItem>

</asp:ListControlName>

Or

<asp:ListControlName Id=“IdName” runat=“Server”>

< asp : ListItem Value =”value”>text</ asp :ListItem>

</asp:ListControlName>

List Control group (cont)

<asp:CheckBoxList Id=“chkLanguage” runat=“Server”> <asp:ListItem Value=”English”> And</asp:ListItem> <asp:ListItem Selected=“true” Value=”French”>

Pháp</asp:ListItem>

<asp:ListItem Value=”Chinese”> Hoa</asp:ListItem>

</asp:ListControlName>

List Control group (cont)

Property:

AutoPostBack: true or false

Items: returns ListItem collection Items array which contain every item So, you want to access to item using index: Items[i]

Which i=0,n-1 (n=Items.Count)

Items.Count: return amount item

Items.Add(ListItem): add item in ListControl

Items.Remove(ListItem): remove item in ListControl

Items.Clear(): Remove all item

Items[i].Selected: return true or false Return true if

List Control group (cont)

Items[i].Text: Return item text

Items[i].Value: Return item value

SelectedIndex: return selected index

SelectedItem:return selected item

SelectedValue: return selected value

DataSource: set value from DataSource such as

DataTable,DataSet,Array,Collection,DataView

DataTextField: set text item from DataSource

DataValueField: set value item from DataSource

List Control group (cont)

List Control group (cont)

List Control group (cont)

foreach(ListItem obj in ListControl.Items)

{

varName=obj.Value;

}

List Control group (cont)

foreach(ListItem obj in ListControl.Items)

if(obj.Selected==true)

{

varName=obj.Value;

}

List Control group (cont)

Create ListControl(Id=lstName) 5 elements

ListItem obj=new ListItem() ;

List Control group (cont)

foreach(ListItem obj in ListControl.Items)

if(obj.Selected==true)

{

ListControl.Items.Remove(obj);

}

List Control group (cont)

OleDbDataAdapter adap;

adap= new OleDbDataAdapter(strSQL,con);

DataSet ds=new DataSet();