My.Settings problem

[swingyswongy]

on close i use

My.Settings.SET20 = Form4.TextBox3.Text
My.Settings.SET21 = Form1.ComboBox2.SelectedIndex

on run i use

Form4.TextBox3.Text = My.Settings.SET20
ComboBox2.SelectedIndex = My.Settings.SET21

and then i get this error at runtime, but only the first time. Once i run it the second time its good from there on out



Help?

[paulg4ije]

Do you have correct data types in the "settings" properties of the project? It looks like SET20 needs to be a string and SET21 an integer. Sorry if this is obvious stuff that you have already checked. I've only just recently used My.Settings for the first time Also, I assume you have My.Settings.Save somewhere ...

[techgnome]

when you first create the settings, they have no value... so it's possible that My.Settings.SET21 is empty... and VB doesn't know how to convert that into a number... or ... the value being returned by the settings doesn't match any indexes in combobox... suggestion - default the value of SET21 to -1 in the settings screen... then that way first time it'll have a value of -1, which means nothing will be selected.

-tg

[swingyswongy]

edit:nm

[swingyswongy]

when you first create the settings, they have no value... so it's possible that My.Settings.SET21 is empty... and VB doesn't know how to convert that into a number... or ... the value being returned by the settings doesn't match any indexes in combobox... suggestion - default the value of SET21 to -1 in the settings screen... then that way first time it'll have a value of -1, which means nothing will be selected.

-tg

yeah that worked! thanks!

[jmcilhinney]

How could SET21 possibly contain an empty string unless it was type String to begin with? If the setting is to hold an Integer then it should be type Integer. You will then have to give it a numeric value. The default would be zero. ALWAYS use the correct types for EVERYTHING. If something represents a number then ALWAYS us a numeric type, etc.