ToNullableString()
Calling Value.ToString on a System.Nullable<T> type where the value is null will result in an "Nullable object must have a value." exception being thrown. This extension method can be used in place of .ToString to prevent this exception from occurring.
Source
public static string ToNullableString<T>(this System.Nullable<T> param) where T : struct
{
if (param.HasValue)
{
return param.Value.ToString();
}
else
{
return string.Empty;
}
}Example
System.Nullable<byte> value = GetValueFromDatabase();
Textbox1.Text = value.ToNullableString();
' GetValueFromDatabase is simulating retrieving a System.Nullable<byte> value from the database.