In Podcast 13 the PC Pro team asks whether Mobile Internet Devices are overhyped nonsense or the best thing since the 3G iPhone. And on the subject of hype, our hardware experts discuss if Intel’s Atom is all it’s cracked up to be. Plus, can you really power your gadgets by wind and solar power alone? Matthew Sparkes tries to persuade a cynical PC Pro panel you can.
We have been developing a whole new information system in ASP.NET (using VB not C#) which has highlighted quite a few interesting questions, which after much searching we have found answers to. My idea is to put the answers here on my blog, one after the other so that other developers who are learning ASP.NET might not fall into the same traps and problems that we have faced!
If you try to set the value of a textbox to a recordset item:
e.g. Me.txtWhatever.Text = dr("FieldName")
if the field in the Data Row (dr) is null you will get an error. The resolution is to encapsulate the statement with a check to see if the item is null first:
if NOT IsDBNull(dr("FieldName")) then
Me.txtWhatever.Text = dr("FieldName")
the "IsDBNull" is a built-in ASP.NET function for checking if field items are null.
I will be adding more ASP.NET tips as I can (when I get time!)