Answer Posted / chandra sekhar dola

The difference between a callback and postback is that, as
with a postback, a callback does not refresh the currently
viewed page (i.e. does not redraw the page). You can think
of it as a quick trip back to get some data etc. For
example if there were two drop down boxes, the second
dependant on the value of the first, when a user selects a
value of a the first, rather then posting the whole page,
doing some server side calculations and returning a new
whole page to the client, a callback can enable you to only
go fetch the required data. Obviously from this, View State
is not updated with a callback (it's the same instance of
the page just updated!!!).

What is break mode?

929

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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 = "" & TxtEmpId.Text & "" & _ "" & TxtName.Text & "" & _ "" & TxtSalary.Text & "" 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 100 xxx 2000 yyy dddd 77777 rrrr rrrr 6666 qaqa sini 50000 errrrrrrrr rrrrrrrrr 677777 rrr rrr 33

2125

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If iam developing an application that must accomodate multiple security levels though secure login and my asp.net web appplication is spanned across three web-servers (using round-robbin load balancing) what would be the best approach to maintain login-in state for the users?

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Define xmlvalidatingreader class.

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How to store checkbox value in database in asp.net mvc? : Asp.Net MVC

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Web API supports which protocol?

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How we can force all the validation controls to run?

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