Answer / ashutosh tripathi

PreInit()
In this Page level event, all controls created during
design time are initialized with their default values. For
e.g., if you have a TextBox control with Text property
= “Hello”, it would be set by now. We can create dynamic
controls here.

This event occurs only for the Page class and
UserControls/MasterPages do not have this method to
override.

Sample code where you can override this method and add your
custom code:


protected override void OnPreInit(EventArgs e)

{
//custom code
base.OnPreInit(e);
}
Note that PreInit() is the only event where we can set
themes programmatically.

Special Case with MasterPages

It is important to note that Master Page is treated like a
control in the Content Pages.
So if a Page has a Master Page associated with it, then
the controls on the page will not be initialized and would
be null in this stage. Only after the Init() event starts,
you can access these controls directly from the page class.
Why?

The reason being that all controls placed in the Content
Page are within a ContentPlaceholder which is a child
control of a MasterPage. Now Master Page is merged and
treated like a control in the Content Pages. As I mentioned
earlier, all events except the Init() and Unload() are
fired from outermost to the innermost control. So PreInit()
in the Page is the first event to fire but User Controls or
MasterPage (which is itself a Usercontrol) do not have any
PreInit event . Therefore in the Page_PreInit() method,
neither the MasterPage nor any user control has been
initialized and only the controls inside the Page class are
set to their default values. Only after the Page_PreInit()
event the Init() events of other controls fire up.

Answer / pavan

PreInit()
In this Page level event, all controls created during
design time are initialized with their default values. For
e.g., if you have a TextBox control with Text property
= “Hello”, it would be set by now. We can create dynamic
controls here.

This event occurs only for the Page class and
UserControls/MasterPages do not have this method to
override.

Sample code where you can override this method and add your
custom code:


protected override void OnPreInit(EventArgs e)

{
//custom code
base.OnPreInit(e);
}
Note that PreInit() is the only event where we can set
themes programmatically.

Special Case with MasterPages

It is important to note that Master Page is treated like a
control in the Content Pages.
So if a Page has a Master Page associated with it, then
the controls on the page will not be initialized and would
be null in this stage. Only after the Init() event starts,
you can access these controls directly from the page class.
Why?

The reason being that all controls placed in the Content
Page are within a ContentPlaceholder which is a child
control of a MasterPage. Now Master Page is merged and
treated like a control in the Content Pages. As I mentioned
earlier, all events except the Init() and Unload() are
fired from outermost to the innermost control. So PreInit()
in the Page is the first event to fire but User Controls or
MasterPage (which is itself a Usercontrol) do not have any
PreInit event . Therefore in the Page_PreInit() method,
neither the MasterPage nor any user control has been
initialized and only the controls inside the Page class are
set to their default values. Only after the Page_PreInit()
event the Init() events of other controls fire up.

What is a web farm?

0 Answers  

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You create an ASP.NET application for a hotel. The application contains a page that displays current weather conditions for the city in which the hotel is located. The application calls an XML Web service every 10 minutes to update the current weather conditions. A new page is then displayed for subsequent requests. You want the same page to be cached and retrieved from the cache during the time between calls to the XML Web service. You decide to use a Page directive to accomplish this goal. Which Page directive should you use? A . <%@ Cache Seconds="600 '' VaryByParam="Page" %> B . <%@ OutputCache Time="600" %> C . <%@ OutputCache Duration="600" VaryByParam="None" %> D . <%@ OutputCache Duration="600" %>

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Hi this is the coding for adding data in to an xml table i want the coding for update and delete Try Dim emp_xml_doc As New XmlDocument If System.IO.File.Exists(Server.MapPath("emp.xml")) Then emp_xml_doc.Load(Server.MapPath("emp.xml")) Dim myrow_element As XmlElement myrow_element = emp_xml_doc.CreateElement("EmpDetails") Dim str As String str = "<EmpID>" & TxtEmpId.Text & "</EmpID>" & _ "<Empname>" & TxtName.Text & "</Empname>" & _ "<EmpSalary>" & TxtSalary.Text & "</EmpSalary>" myrow_element.InnerXml = str emp_xml_doc.DocumentElement.AppendChild(myrow_element) emp_xml_doc.Save(Server.MapPath("emp.xml")) Response.Write("Record Saved") Dim ds As New DataSet ds.ReadXml(Server.MapPath("emp.xml")) GridView1.DataSource = ds GridView1.DataBind() Else Response.Write("File does not exist.") End If Catch ex As Exception Response.Write(ex.ToString) End Try *********************** this is the xml file <?xml version="1.0" encoding="utf-8" ?> <Employee> <empdetails> <empid>100</empid> <empname>xxx</empname> <empsalary>2000</empsalary> </empdetails> <EmpDetails> <EmpID>yyy</EmpID> <Empname>dddd</Empname> <EmpSalary>77777</EmpSalary> </EmpDetails> <EmpDetails> <EmpID>rrrr</EmpID> <Empname>rrrr</Empname> <EmpSalary>6666</EmpSalary> </EmpDetails> <EmpDetails> <EmpID>qaqa</EmpID> <Empname>sini</Empname> <EmpSalary>50000</EmpSalary> </EmpDetails> <EmpDetails> <EmpID>errrrrrrrr</EmpID> <Empname>rrrrrrrrr</Empname> <EmpSalary>677777</EmpSalary> </EmpDetails> <EmpDetails> <EmpID>rrr</EmpID> <Empname>rrr</Empname> <EmpSalary>33</EmpSalary> </EmpDetails> </Employee>

0 Answers   InfoCom,

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What is a WebService and what is the underlying protocol used in it? Namespace?

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Write a standard lock() plus double check to create a critical section around a variable access?

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