Exam 8: String Manipulation

The Trim method is used to remove characters only from the end of a string.

Each menu element is considered a(n)____ and has a set of properties associated with it.

Which of the following shortcut keys should not be used in Windows applications that have an EDIT menu for menu items not on the EDIT menu?

Assume that the value of the string message is "Happy New Year".What value would message.IndexOf("New")yield?

A literal type character forces a literal constant to assume a data type other than the one its form indicates.

Case 1 - Human Resources Application An application used by the Human Resources (HR) department needs to be improved. You need to use various string manipulation properties and methods to ensure all data entered by a user is accurate and stored correctly. -The application needs to process benefits for full-time employees only.Which of the following statements determines whether the strEmpCode variable contains an employee code for a full-time employee?

The following sample of code contains errors. Rewrite the incorrect statements to correct all errors. -Private Sub btnDisplay_Click(ByVal sender As Object,ByVal e As System.EventArgs)Handles btnDisplay.Click ' displays a pay rate based on an employee's code ' Full Time employee pay rate is 11.50.Part Time ' employee pay rate for those working more than 30 hours ' is 10.50,otherwise it is 9.50 Dim strEmpCode As String Dim decPayRate As Integer strCode = txtEmpCode.Text.Snip ' validate the employee code If strEmpCode = "FT##" Then decPayRate = 11.50 ElseIf strEmpCode Like "PT30##" Then decPayRate = 9.50 Else decPayRate = 10.50 End If ' display pay rate lblPayRate.Text = decPayRate.ToString("N2") End Sub

What is the difference between a menu item's access key and shortcut key?

If an application expects the user to enter a seven-digit phone number or a five-digit ZIP code,the application's code should verify that the user entered the required number of characters.

Write the Visual Basic statements needed to format decNetPay with two decimal places,pad the formatted variable with asterisks until its length is 12,and then insert a dollar sign ($)as the first character.The result is assigned to the strNetPayFormat variable.

How many characters will be removed from the string below? Dim myString as string = "ABCDEFGH" MyString = myString.Remove(2,3)

Write the Visual Basic statement to assign the number of characters in the txtSSN control's Text property to the intSSNNumChar variable.

The strSerialNum variable contains the string "DRY259614".Write the Visual Basic statement that assigns the string "259614" from the strSerialNum variable to the strProductCode variable.

In Visual Basic 2015,you use a(n)____ to include one or more menus in an application.

The ____ allows you to use pattern-matching characters to determine whether one string is equal to another string.

Programmers use the ____ property of the menu element to refer to the menu element in code.

The following sample of code contains errors. Rewrite the incorrect statements to correct all errors. -Private Sub btnDisplay_Click(ByVal sender As Object,ByVal e As System.EventArgs)Handles btnDisplay.Click ' displays type of vehicle for the code entered by user Const strLENGTH_MSG As String = "The code must contain four characters." Const strTYPE_MSG As String = "The last character in the code must be C,T,or V." Dim strCode As String Dim strLastChar As String strCode = txtCode.Text.ToLower ' determine whether code contains exactly 4 characters If strCode.Chars < 4 Then lblType.Text = String.Empty MessageBox.Show(strLENGTH_MSG,"Code", MessageBoxButtons.OK, MessageBoxIcon.Information) Else ' determine whether the last character is valid strLastChar = strCode.Substring(4) Select Case strCode Case "C" lblType.Text = "Car" Case "T" lblType.Text = "Truck" Case "V" lblType.Text = "Van" Case Else lblType.Text = String.Empty MessageBox.Show(strType_MSG,"Type", MessageBoxButtons.OK, MessageBoxIcon.Information) End If End If End Sub

Write a Visual Basic statement that removes the last four digits of the credit card number and assigns it to the strCCLastFour variable. strCCNum = "4456778996352852"

Describe four of the six menu standards that should be followed when including a menu in an application.

The txtGrade control contains the string "95%".Write the Visual Basic statement to remove the percent sign from the txtGrade control as well as convert the contents of the control to a Decimal number.Assign the result to the decGrade variable.Use the TrimEnd method.