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The last declar at ion in t he Page_Load ev ent pr ocedur e is for an int eger value ( int 1) t hat serv es as an index value for t he array m em bers in t he passedkeys array Aft er t he declarat ions, t he pr ocedur e st art s work ing on t he query st ring collect ion The first st ep is t o pass t he query st ring collect ion t o col1 Next t he procedur e t akes t he collect ion of k ey nam es in col1 and saves it in passedkeys Then t he procedure perform s a loop fr om 0 t hrough 1 less t han t he count of elem ent s in t he passedkeys ar rays.

Use WithEvents to be able to trap events from this object. Dim WithEvents fsw As New FileSystemWatcher()

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The Get Upper Bound m et hod w it h an argum ent of 0 aut om at ically ret ur ns t he count of array elem ent s less 1 This loop enum erat es t he m em bers of t he passedkeys array When t he loop det ect s a passedkeys array value wit h a nam e of eit her UserI D or Password, t he code saves t he cor responding value fr om col1 in t he first elem ent of t he passedvalues array Then a Select Case st at em ent sort s out w het her t he key is a user id or a password and assigns t he passedvalues elem ent t o an appropriat ely nam ed st r ing value.

Table 37-6.

This is exactly the same position as the RequiredFieldValidator control for the employeeID text box. Specifying the same location for these two error messages is not a problem because the validations performed by these controls are mutually exclusive (if the employee ID is blank, the RangeValidator control cannot test the value entered by the user), so only one of the error messages can be displayed. 3. Click anywhere in the HTML code for the RangeValidator1 control. In the Properties window, set the ControlToValidate property to employeeID. Enter The employee ID must be between 1 and 5000 in the ErrorMessage property. Set the MaximumValue property to 5000, the MinimumValue property to 1, and the Type property to Integer. Note You can use the RangeValidator control to restrict the range of non-numeric data

At t he conclusion of t he Page_Load event procedur e, t he st ruser id and st rpassword st rings cont ain t he Text propert y set t ings for t he UserI D and Password t ext boxes at t he t im e t he page left t he br owser I f t he user clicked But t on1, t he But t on1_Click ev ent pr ocedur e concat enat es t hese t w o st r ings and assigns t hem t o t he Text pr opert y of Text Box1 Dim struserid As StringDim strpassword As String Private Sub Page_Load(ByVal sender As SystemObject, _ ByVal e As SystemEventArgs) Handles MyBaseLoad Declare query string parsing variables Dim coll As _ SystemCollectionsSpecialized.

Table 8-3 summarizes the most important properties and methods of the SortedList class. You have already met most of them, and the new ones are almost self-explana tory, so I won t describe them in detail. The SortedList class compares keys in case-sensitive mode, with lowercase characters coming before their uppercase versions (for example with Ann coming before ANN, which in turn comes before Bob). If you want to compare keys without taking case into account, you can create a case-insensitive SortedList object using the auxiliary Collec tionsUtil object in the System.Collections.Specialized namespace:

You should always run your databases in the 90 compatibility level for SQL Server 2005 and avoid setting the compatibility level to an earlier version to permanently work around any incompatibilities you encounter after an upgrade.

NameValueCollection Dim passedkeys(), passedvalues() As String Dim int1 As Integer Use QueryString property of Request object to pass query string to col1, a NameValueCollection variable, and return all key names to passedkeys string array coll = RequestQueryString passedkeys = collAllKeys Loop through keys and get value for.

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