VB.NET: Option Strict ON conversion

[toytoy]

I heard that working on codes with Option Strict ON give me a better way to learn programming....
Say I have turn the Option Strict ON....
all the coding works well when the option Strict is OFF.....

1) How to convert the error "String to Integer" in this case

Dim data As String
For Each nod As XmlNode In xdoc.SelectNodes("//time")
	data = nod.Attributes("hour").Value
	cboVHour.SelectedIndex = data
Next

2) Secondly, I have this String which take in Integer, how to solve the error "Integer to String" in the second case.

Dim dd As Integer
dd = Now.Day
lblDay.Text = dd

3) Lastly, I have an Xml String and I wanted to display an additional day to it in the Xml String. How to solve thr error "String to Double" in this third case.

 XmlString = <OK> dd + 1 </OK>

Thanks

 

[Paszt]

Turning Options Strict On is definitely something everyone should do, unless there's a very good reason (using lots of late binding for example). Having Option Strict On is a performance helper (by elimitating hidden type conversions) and catches lots of possible errors. In your first example for instance, if the XML file had a non-numeric value for some reason, the code would throw an exception (you should use Try/Catch blocks).

You'll want to use conversion functions to solve all these questions. Here's a good article that explains the best practives of those different conversion functions: Visual Basic .NET Internals. Look for a section called 'Conversion Functions, CType, DirectCast, and System.Convert'

'1:
For Each nod As XmlNode In xdoc.SelectNodes("//time")
    cboVHour.SelectedIndex = CInt(nod.Attributes("hour").Value)
Next

'2:
Dim dd As Integer
dd = Now.Day
lblday.Text = dd.ToString

'3:
???