Some of Bing map and Google map services are not free, For example, They will not provide a free Geo database to developer. Fortunately there are some open source geo information websites. Geonames.org is the one great open source and free geo services provider. About Geonames.org: The GeoNames geographical database is available for download free [Read More ...]
ADO.NET can work on either connected mode or disconnected mode. Connected mode implies the database connection is open, for example, if you use DataReader, the database connection state keeps on open; If you use DataSet or DataAdapter, the database connection status is cloesed, it is ADO.NET disconnected mode; When DataAdapter Fill() data to DataSet, the [Read More ...]
Aug 102011
HTTP protocol is a stateless protocol. So ASP.NET need to manage the state. ASP.NET comes with built-in supports for state management both at the server and client side. Server Side State Management: State information can be managed using Application, Session or Cache objects; Application Object: Application object can store the information for all users who [Read More ...]
ASP.NET Application Life Cycle: The life cycle of an ASP.NET application starts with a request sent by a browser to the Web server (IIS). ASP.NET Application Life Cycle can be different due to different version of web server: IIS7.0 is different from IIS 6.0 / 5.0. The main difference in processing stages between IIS 7.0 [Read More ...]
Jun 302011
The ClientID of Control is the ID that client script can access a server control. As a .NET programmer, you should know how difficult if you want to load your server side control using Java scripts in Client. Because you don’t know control’s ID until runtime. Normally we just could put our Javascript in code [Read More ...]
Before ASP.NET 4.0, you could add meta keywords and description using HTML in asp.net web page. In ASP.NET 4.0, you can set keywords and descriptions for your web pages declaratively. There are two keywords MetaDescription and MetaKeywords in Page tag. For example: <%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" MetaDescription = "This is Description" [Read More ...]
When you run ASP.NET web application, and when you try to do a Role operation such as adding a role, you might get an error message: The Role Manager feature has not been enabled. This error message is not from your code, it is from ASP.NET. The reason is that By default the Roles provider [Read More ...]
Mar 292011