Nikolaos Kantzelis ASP.Net Blog

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Web server controls in ASP.Net - part 2

In this second post of presenting the basic web server controls in ASP.Net we will look into the Adrotator control. You can find the first post here.

I think that people who begin now with ASP.Net will find these posts useful.

We can use the Adrotator control and to serve up random banners in our web site.

I will use a hands-on an example with C# version.I will use an XML file that will serve as the source for my banners.

The AdRotator was included in ASP.Net 2.0 version.

I will be using VS 2010 Ultimate edition to create a simple asp.net application.

1) Launch Visual Studio 2010/2008/2005 (or express editions).

2) Create a new website and choose an approriate name.

3) From your toolbox just drag and drop an AdRotator Control in the Default.aspx page

5) Click on your project from the Solution explorer and create an Images folder

6) Place your random images in the folder above

7) Add a new item to your site. IName it “advs.xml”. Place it in the App_Data special folder that is already created in your project structure.

8) Copy and paste the following XML code inside the “advs.xml” file. 

<?xml version=”1.0″ encoding=”utf-8″ ?>
<Advertisements xmlns=”http://schemas.microsoft.com/AspNet/AdRotator-Schedule-File”>
</Advertisements>
<Ad>
<ImageUrl>~/images/ajax-logo.gif</ImageUrl>
<NavigateUrl>http://www.asp.net/ajax/</NavigateUrl>
<AlternateText>ASP.NET AJAX is a free framework for quickly creating efficient and interactive Web applications that work across all popular browsers</AlternateText>
<Keyword>asp.net ajax</Keyword>
<Impressions>100</Impressions>
</Ad>
<Ad>
<ImageUrl>~/images/asp-logo.png</ImageUrl>
<NavigateUrl>http://www.asp.net</NavigateUrl>
<AlternateText>ASP.NET is a free technology that allows anyone to create a modern web site</AlternateText>
<Keyword>Asp.Net</Keyword>
<Impressions>150</Impressions>
</Ad>
<Ad>
<ImageUrl>~/images/NET-logo.png</ImageUrl>
<NavigateUrl>http://www.microsoft.com/NET/</NavigateUrl>
<AlternateText>The .NET Framework is Microsoft’s comprehensive and consistent programming model for building applications </AlternateText>
<Keyword>.NET</Keyword>
<Impressions>250</Impressions>
</Ad>
</Advertisements>

Make sure you change the name of the images in the <ImageUrl> attribute to reflect the images you placed in the Images folder in your project.

9) Now select the AdRotaror control and from the properties window in VS select the property called AdvertisementFile .Click on the ellipsis button and navigate until you find the “advs.xml” file.

10) Run your application and observe all the banners specified in the .xml file appearing randomly according to their weight (Impressions attribute).

If you want to enable some sort of filtering in your ads, you can do so.

If you place a DropDownlist control in your default.aspx page and add as items these names

  • asp.net ajax
  • Asp.Net
  • .NET

Enable AutoPostBack property for this control.By clicking on this control in the Default.aspx.cs,

You will be presented with the event handling routine for the standard event(SelectedIndexChanged).

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
AdRotator1.KeywordFilter = DropDownList1.SelectedItem.Value;
}


We set the property Keywordfilter of the AdRotator control to the value of the selected item from the list, thus selecting only the banners that match the keyword.

Run your application and choose different items from the dropdownlist . In my example there are 3 banners with 3 different keywords so only one banner will be shown every time you choose a different item.

I would like to show you how you can retrieve the ads if we have a Sql Server database as our source file.

1) First we need to create the database . Select the App_Data special folder and add a new item, a Sql Server Database. Call it banners.mdf.We need to create a table and we will call it ads

The definition for this table, for fields and data types could be


1st row

ImageUrl = ~/images/asp-logo.png
NavigateUrl=http://www.asp.net
AlternateText=ASP.NET is a free technology that allows anyone to create a modern web site
Keyword=Asp.Net
Impressions=150
2nd row

ImageUrl = ~/images/ajax-logo.gif
NavigateUrl=http://www.asp.net/ajax
AlternateText=ASP.NET AJAX is a free framework for quickly creating efficient and interactive Web applications that work across all popular browsers
Keyword=asp.net ajax
Impressions=100

3rd row

ImageUrl = ~/images/NET-logo.png
NavigateUrl=http://www.microsoft.com/NET
AlternateText=The .NET Framework is Microsoft’s comprehensive and consistent programming model for building applications
Keyword=.Net
Impressions=250

 

Now create a new .aspx page and make it the Start page.Name it as you want.

Place a new AdRotator control in the newly created page.

Now we must have a datasource control that points to the database we created and tie this datasource control with the rotator control.

Click on the little arrow in the rotator control and choose New Data Source, choose database from the window and then from the Configure DataSource window, select the banner database and click Next.

Then select the ads table and select all the fields from the table. Test the query and click Finish.

Run your application and see the ads to apper now from the database.

You can email me if you want the source code or leave a comment.

Hope it helps!!!!

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