AutoCompleteCustomSource – Specified Cast is Not Valid

There was a requirement to implement a textbox with a databound AutoComple feature. As the Autocomplete source was a database, I have to go for a custom DataSource. The main requirements for an auto-complete textbox (in this scenario) are: AutoCompleteMode is set to Suggest(or SuggestAppend). AutoCompleteSource is set to CustomSource AutoCompleteCustomSource is set AutoCompleteStringCollection. A … Read more