In this post I'd like to point out one important mistake I noticed that many beginners of .NET do: They forget to create a reference to related the .NET assembly.
Even if you are preparing for an interview question or doing the actual programming, you have to know you need to create an assembly reference in .net so that your compiler can compile the program.
An example to this mistake: The programmer includes the below code to the top of the C# class file.
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Tcp;
However, he/she forgets to tell the compiler where to find the actual assembly file (dll).
Correct the mistake by:
right click the solution, and click on "Add Reference".Select the System.Runtime.Remoting assembly in the list.This is like only telling someone to get sugar from Walmart.
How can that person know where Walmart is, if you don't tell him?!
Don't expect the person to guess or find out himself because the subject in question is NOT a person. He is a computer! And computers are stupid!
Tuesday, October 30, 2007
HTML Templates
In this tutorial, I'll provide the basic html codes used in website designs. In web application development most developers use WYSIWYG (What You See Is What You Get) type programs like Frontpage, Dreamveawer and Visual Studio. But if you want to take advanced control of your website, sticking to the html codes is inevitable and most developers directly work on the html tags. Let's not forget to say HTML stand for "Hyper-Text Markup Language".
Let's take a look at how the html structure of a web page is:
<html>
<head><title>New Page</title></head>
<body>
</body>
</html>
Above is the html template code that has to be present in EVERY html page so that it can be displayed by the browsers like Firefox, Internet Explorer, Netscape etc. Notice that this script is well-formed i.e. each tag has a matching closing tag.
There are two major code manipulations to make a web page work.
CSS stands for "Cascading Style Sheets". As it's name implies, it is used to manipulate the style, look and feel of a web page.
In addition to these two code manipulations, you need to deal with a third type of code which is server side scripting and programming if you need a dynamic page. C#, VB.NET, PHP, ASP CGI are examples of server side programming.
Here comes the difference between Javascript and C#. One is client side coding and the other one is server side coding. For instance C# runs and processes the user input in the server and responds to a users request while Javascript runs in the users computer and validates user input or triggers some funny effects when the users moves their mouse.
We will code html template with more functionalities in the next posts. So bear with me and feel free to share your comments.
Let's take a look at how the html structure of a web page is:
<html>
<head><title>New Page</title></head>
<body>
</body>
</html>
Above is the html template code that has to be present in EVERY html page so that it can be displayed by the browsers like Firefox, Internet Explorer, Netscape etc. Notice that this script is well-formed i.e. each tag has a matching closing tag.
There are two major code manipulations to make a web page work.
- Javascript
- CSS
CSS stands for "Cascading Style Sheets". As it's name implies, it is used to manipulate the style, look and feel of a web page.
In addition to these two code manipulations, you need to deal with a third type of code which is server side scripting and programming if you need a dynamic page. C#, VB.NET, PHP, ASP CGI are examples of server side programming.
Here comes the difference between Javascript and C#. One is client side coding and the other one is server side coding. For instance C# runs and processes the user input in the server and responds to a users request while Javascript runs in the users computer and validates user input or triggers some funny effects when the users moves their mouse.
We will code html template with more functionalities in the next posts. So bear with me and feel free to share your comments.
Wednesday, October 10, 2007
DataGrid Paging and Sorting Implementation
Unless you use ASP.NET's auto designer mode and auto features, you have to implement sorting and paging methods for the Datagrid in C# or VB.NET codes.
Declare the page index changed event and its handler in InitializeComponent() method of the C# code.
Implement the method which will set the index to the new page index.
private void DataGrid1_PageIndexChanged(object source, DataGridPageChangedEventArgs e) {
}
Do the same for sorting.
If the database query returns huge number or records, you may wanna consider Caching the recordset. Otherwise, each PageIndexChanged event will cause hitting the database again and again which results in a performance decrease.
Use the method Cache.Insert(dataset) to do this.
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