911/2006
Visual search with Quintura
By Jesper Lind
811/2006
Procedure ... expects parameter ... which was not supplied : ADO.NET Error
I had some problems with figuring out the cause about this error.
Procedure <procedure name> expects parameter <parameter name>, which was not supplied : ADO.NET Error
At last I found the solution on Data Mining Developers.
Example of the problem
string ColumnName = null;
//error will be thrown if the variabe ColumnName is null
if(ColumnName ==null)
ColumnName=string.Empty;
SqlParameter param = new SqlParameter("@ColumnName", SqlDbType.NVarChar, 100);
param.Value = ColumnName;
cmd.Parameters.Add(param);
cmd.Execute();
//error will be thrown if the variabe ColumnName is null
if(ColumnName ==null)
ColumnName=string.Empty;
SqlParameter param = new SqlParameter("@ColumnName", SqlDbType.NVarChar, 100);
param.Value = ColumnName;
cmd.Parameters.Add(param);
cmd.Execute();
By Jesper Lind
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511/2006
Tag frequency and popularity acceleration
Alex Hillman headlines his blog with the sentence "tagging isnt just for hoodlums anymore" and I couldn't agree more. Tags and social bookmarks are just everywhere and part of most Web2.0 services.
On my web site there's not that much content yet. But I feel I need to upgrade my categories soon and perhaps add a tag cloud.
Jason Kottke is having similar thoughts and writes an interesting post about how to calculate how much the popularity of the tags are accelerating. In this way you can produce a list of tags that represents what's been going on recently on the site. Sort of like the "hot tags" on Flickr.
By Jesper Lind
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111/2006
This autumns CSS Reboot has begun
Yes! I have finally completed my contribution for this autumn's CSS Reboot. An affair where hundreds of web developers are encouraged to update their web sites simultaneously.
The process
I am not an web designer but foremost an programmer. I can not compete with the other contributions of the reboot but wanted to take part anyway. My goal with this design was to create an web standard correct site without any CSS-hacks at all. I was really tired of the old look and wanted to improve. I wanted to use rounded corners on some places and for this I used the teriffic Nifty Corners Tube. But since it is not possible to have transparency on the outside of the corners I also used another technique found on 456bereastreet.com.
No support for IE6
I decided not to have any support for IE6 or earlier versions of Internet Explorer and I wanted to use transparent PNG images (which does not work in IE6). So if you can't see my logo in the top or if the borders look strange - you are probably using IE6.
Other rebooters
There are a lot of nice rebooters this time. I will update this section as I find more web sites that I like. Here are some of them in no particular order.
I especially like 32framespersecond.com with the nice collage of images.
The german designer site Mein Brandenburg has done an absolute masterpiece. Very nice images in the gallery as well.
I also like the contribution from the developer Edoardo Sabadelli. A nice design with an intresting three-column layout with the meny in the middle. Works really well.
Weknowhtml.com has done a stylish layout against a dark gray background. Love that frog! Simple and clean html, these are definitely an company I would trust if I needed a site design.
Gradient Dropshadow Curve has a light design. I really like that AJAX search-box as well.
By Jesper Lind
9 kommentarer
2710/2006
The confusing cursor:hand declaration
How to make make an cursor as a hand on elements is something that been confusing me for a while. Now I have understood what I've been doing wrong. Cursor:hand is not a valid CSS declaration but only a own invention from Microsoft. You should instead use the standardized declaration cursor:pointer. Cursor:pointer works in IE6 and IE7 but not in the older IE5 and IE5.5. If you have users with old Microsoft browsers you can use a dubble declaration.
element { cursor: pointer; cursor: hand; }
The order of the declarations is important, the modern browsers will ignore the last declaration. This can cause CSS validation errors so I think I will choose to leave the old IE versions to their destiny and only use cursor:pointer in the future.
Read more about cursor styles
http://www.quirksmode.org/css/cursor.html
By Jesper Lind
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2610/2006
APE (Actionscript Physics Engine)
Alec Cove who has earlier released the physics engine Flade is now releasing APE (Actionscript Physics Engine). It is written in AS3 and comes with an API.
By Jesper Lind
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2610/2006
New 3D Engine for flash
By Jesper Lind
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2410/2006
How to make a link destinct?
There are several ways of making links visible in a block of text. Here are some examples.
This is a link right here but you couldn't see it right? Perhaps we should make them appear with dots beneath them like this or in another color. The yellow shade is a bit too pale, you can hardly see it can you? Or should all links be in bold, inverted or perhaps underlined? Which is your favorite link design?
CSS for the links above
<style type="text/css">
a.noStyle, a.noStyle:link, a.noStyle:active, a.noStyle:visited { color: #000; text-decoration:none; }
a.noStyle:hover { }
a.dotted, a.dotted:link, a.dotted:active, a.dotted:visited { color: #000; text-decoration:none; border-bottom:1px dotted #333; }
a.dotted:hover { border-bottom:1px solid #000; }
a.invert, a.invert:link, a.invert:active, a.invert:visited { color: #fff;background-color: #000; text-decoration:none; border-bottom:1px dotted #333; }
a.invert:hover { border-bottom:1px solid #000; }
a.yellow, a.yellow:link, a.yellow:active, a.yellow:visited { color: #E2D459; text-decoration:none; }
a.yellow:hover { text-decoration:underline;}
a.underlined,a.underlined:link,a.underlined:
active,a.underlined:visited{text-decoration:underline;}
a.underlined:hover { text-decoration:underline;}</style>
a.noStyle, a.noStyle:link, a.noStyle:active, a.noStyle:visited { color: #000; text-decoration:none; }
a.noStyle:hover { }
a.dotted, a.dotted:link, a.dotted:active, a.dotted:visited { color: #000; text-decoration:none; border-bottom:1px dotted #333; }
a.dotted:hover { border-bottom:1px solid #000; }
a.invert, a.invert:link, a.invert:active, a.invert:visited { color: #fff;background-color: #000; text-decoration:none; border-bottom:1px dotted #333; }
a.invert:hover { border-bottom:1px solid #000; }
a.yellow, a.yellow:link, a.yellow:active, a.yellow:visited { color: #E2D459; text-decoration:none; }
a.yellow:hover { text-decoration:underline;}
a.underlined,a.underlined:link,a.underlined:
active,a.underlined:visited{text-decoration:underline;}
a.underlined:hover { text-decoration:underline;}</style>
By Jesper Lind
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1010/2006
Get currency rates using Web Service
Update: The web service used in this example is not availible any more.
I was inspired by an article about currency conversion on Code Project when I made my own example. Please read the article in the link below to find out how to add an Web Service to your project. I am using a Web Service from xmethods.net.
<%@ Page Language="C#" Trace="true" validateRequest="false" EnableSessionState="True" EnableViewState="true" SmartNavigation="false"%>
<script Language="c#" runat="server">
protected void Page_Load(object sender, EventArgs e)
{
try
{
Rate_WS.CurrencyExchangeService to_currency = new Rate_WS.CurrencyExchangeService();
float Euro_Dollar = to_currency.getRate("euro", "united states");
float Dollar_Sek = to_currency.getRate("united states", "sweden");
float Euro_Sek = to_currency.getRate("euro", "sweden");
float Sek_Yen = to_currency.getRate("sweden", "japan");
lblEuro_Sek.Text = Euro_Sek.ToString();
lblDollar_Sek.Text = Dollar_Sek.ToString();
lblEuro_Dollar.Text = Euro_Dollar.ToString();
lblSek_Yen.Text = Sek_Yen.ToString();
}
catch (Exception) { }
}
</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Currency converter in ASP.NET</title>
<link rel="stylesheet" href="../example.css" type="text/css" />
</head>
<body>
<div id="content">
<b>Currency example using web service</b>
<br /><br />
1 US Dollar = <asp:Label ID="lblDollar_Sek" runat="server" /> SEK
<br /><br />
1 Euro = <asp:Label ID="lblEuro_Sek" runat="server" /> SEK
<br /><br />
1 Euro = <asp:Label ID="lblEuro_Dollar" runat="server" /> US Dollar
<br /><br />
1 SEK = <asp:Label ID="lblSek_Yen" runat="server" /> Yen
</div>
</body>
</html>
<script Language="c#" runat="server">
protected void Page_Load(object sender, EventArgs e)
{
try
{
Rate_WS.CurrencyExchangeService to_currency = new Rate_WS.CurrencyExchangeService();
float Euro_Dollar = to_currency.getRate("euro", "united states");
float Dollar_Sek = to_currency.getRate("united states", "sweden");
float Euro_Sek = to_currency.getRate("euro", "sweden");
float Sek_Yen = to_currency.getRate("sweden", "japan");
lblEuro_Sek.Text = Euro_Sek.ToString();
lblDollar_Sek.Text = Dollar_Sek.ToString();
lblEuro_Dollar.Text = Euro_Dollar.ToString();
lblSek_Yen.Text = Sek_Yen.ToString();
}
catch (Exception) { }
}
</script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Currency converter in ASP.NET</title>
<link rel="stylesheet" href="../example.css" type="text/css" />
</head>
<body>
<div id="content">
<b>Currency example using web service</b>
<br /><br />
1 US Dollar = <asp:Label ID="lblDollar_Sek" runat="server" /> SEK
<br /><br />
1 Euro = <asp:Label ID="lblEuro_Sek" runat="server" /> SEK
<br /><br />
1 Euro = <asp:Label ID="lblEuro_Dollar" runat="server" /> US Dollar
<br /><br />
1 SEK = <asp:Label ID="lblSek_Yen" runat="server" /> Yen
</div>
</body>
</html>
By Jesper Lind
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910/2006
Ping to Google Blog Search
It's now possible to submit your blog url or rss feed to Googles Blog Search. Many blogengines support automatic ping to the services you like to notify. More info: Read about how to ping Google Google Blog Search Ping Service
By Jesper Lind
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