To delete the Object ID, right-click the variable in the Locals window and select Delete Object ID. For example, if the variable item is the object to be added to the collection, select Is true and type item = $, where is the object ID number.Įxecution will break at the point when that object is to be added to the collection. Use the Object ID in the Conditional Expression field. Right-click the breakpoint and select Conditions. This is the object ID.Īdd a new breakpoint at the point you want to investigate for example, when the object is to be added to the collection. You should see a $ plus a number in the Locals window. Start debugging, and when execution pauses at the breakpoint, select Debug > Windows > Locals (or press Ctrl + Alt + V, L) to open the Locals window.įind the specific object instance in the Locals window, right-click it, and select Make Object ID. Set a breakpoint in the code some place after the object has been created. The object ID is generated by the common language runtime (CLR) debugging services and associated with the object. In C# and F#, you can create object IDs for specific instances of reference types, and use them in breakpoint conditions. For example, you might want to find out why an object was inserted into a collection more than once. There are times when you want to observe the behavior of a specific object. Use Object IDs in conditional expressions (C# and F# only) Or hover over the breakpoint symbol, select the Settings icon, and then select Conditions in the Breakpoint Settings window.įor the When changed field, the debugger doesn't consider the first evaluation of the condition to be a change, so doesn't hit the breakpoint on the first evaluation. Right-click the breakpoint symbol and select Conditions (or press Alt + F9, C). For more information about valid expressions, see Expressions in the debugger. The condition can be any valid expression that the debugger recognizes. You can control when and where a breakpoint executes by setting conditions. For detailed instructions, see Use tracepoints in the Visual Studio debugger. You create a tracepoint by setting a special action in the Breakpoint Settings window. A tracepoint can act like a temporary trace statement in the programming language and does not pause the execution of code. Set conditions and actions, add and edit labels, or export a breakpoint by right-clicking it and selecting the appropriate command, or hovering over it and selecting the Settings icon.Ī tracepoint is a breakpoint that prints a message to the Output window. To re-enable a breakpoint, hover over or right-click it, and select Enable breakpoint. Disabled breakpoints appear as empty dots in the left margin or the Breakpoints window. To disable a breakpoint without deleting it, hover over or right-click it, and select Disable breakpoint. You can click it, press F9, or use Debug > Toggle Breakpoint to delete or reinsert it. Here are a few general instructions for working with breakpoints. When the debugger stops at the breakpoint, you can look at the current state of the app, including variable values and the call stack. So, the value hasn't changed since the variable was initialized (set to a value of 1) because the statement in yellow hasn't yet executed. For C++ code, you can turn on highlighting of breakpoint and current lines by selecting Tools (or Debug) > Options > Debugging > Highlight entire source line for breakpoints and current statement (C++ only).Īt the breakpoint in the following example, the value of testInt is still 1. The breakpoint appears as a red dot in the left margin.įor most languages including C#, breakpoint and current execution lines are automatically highlighted. You can also select the line and press F9, select Debug > Toggle Breakpoint, or right-click and select Breakpoint > Insert breakpoint.
0 Comments
Leave a Reply. |