What is the difference between a trace and a breakpoint

Editing Source Code 2 Find the appropriate code line, right-click in the left margin and select the 'Add Tracepoint Marker' option. Breakpoint Properties 3 Ensure the 'Trace statement' checkbox is selected. Trace Statements 5 Click on the OK button. Prev Next. Resources Resources UML 2. All rights Reserved.

Legal Privacy About us. Open the source code to debug in the source code editor. Editing Source Code. Breakpoint Properties. Ensure the 'Trace statement' checkbox is selected. A functional area is generally a line of code that will be executed when a program runs. Visual Studio will prevent the creation of breakpoints on non-functional lines, such as comments , blank lines or class declarations.

To demonstrate the use of breakpoints we will use a simple console application that calculates and displays multiplication tables.

Create a new console application and add the following code to the Main method :. There are several ways in which to set breakpoints. The first manner that we will explore is with the use of the Visual Studio menus. Using this method, a breakpoint is added by positioning the cursor on the desired line before selecting "Toggle Breakpoint" from the Debug menu. You can also press the F9 key for the same result.

To test this, position the cursor in the first line of code containing a Console. WriteLine statement. Press F9 to set the breakpoint. The line should change colour and you will see a circular icon appear in the grey margin area to the left of the code. This icon is called a breakpoint glyph.

The filled circle glyph indicates an active, normal breakpoint. The code can now be executed by pressing F5. When the breakpoint location is hit, the program enters break mode, allowing you to step through the code using the debugging tools. The B command can be used to define a breakpoint in a program. Variable name to be tested. Value to test the variable by. Can be a numeric value, a string, or another variable in the program.

If the value is a string, it must be enclosed in single or double quotes. A backslash is not accepted as a delimiter. Although spaces have been supplied above for clarity, spaces are not accepted in the syntax for the B command. To picture a breakpoint condition in mvBASIC language, think of it as being equivalent to entering the following throughout the program:.

Line numbers can be tested as well as variables. For example,. Conditions comparing line numbers can be combined with conditions comparing variables.