前幾節開發Dapr應用程式時，我們使用 dapr cli 來啟動dapr服務，就像這樣：
dapr run --dapr-http-port 3501 --app-port 5001 --app-id frontend dotnet .\FrontEnd\bin\Debug\net5.0\FrontEnd.dll
如果你想要通過dapr除錯服務呢？在這里使用 dapr 運行時(daprd) 來幫助實作這一點，具體原理就是先從命令列中運行符合正確引數的 daprd，然后啟動您的代碼并附加除錯器，
1.配置launch.json
vscode打開專案，并創建launch.json
修改launch.json的preLaunchTask，自定義名字，preLaunchTask將參考在 tasks.json 檔案中定義的任務，
{ // Use IntelliSense to learn about possible attributes. // Hover to view descriptions of existing attributes. // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387 "version": "0.2.0", "configurations": [ { "name": "Frontend-.NET Core Launch (web)", "type": "coreclr", "request": "launch", //"preLaunchTask": "build", "preLaunchTask": "daprd-frontend", "program": "${workspaceFolder}/FrontEnd/bin/Debug/net5.0/FrontEnd.dll", "args": [], "cwd": "${workspaceFolder}/FrontEnd", "stopAtEntry": false, "serverReadyAction": { "action": "openExternally", "pattern": "\\bNow listening on:\\s+(https?://\\S+)" }, "env": { "ASPNETCORE_ENVIRONMENT": "Development" }, "sourceFileMap": { "/Views": "${workspaceFolder}/Views" } }, { "name": ".NET Core Attach", "type": "coreclr", "request": "attach" } ] }
2.配置task.json
需要在task.json檔案中定義一個 daprd task和問題匹配器（problem matcher）， 這里有兩個通過上述 preLaunchTask 成員參考， 在 dpred -frontend task下，還有一個dependsOn成員，它參考build任務，以確保最新的代碼正在運行/除錯， 用了 problemMatcher，這樣當 daprd 行程啟動和運行時，VSCode 就能夠知道，
{ "version": "2.0.0", "tasks": [ { "label": "build", "command": "dotnet", "type": "process", "args": [ "build", "${workspaceFolder}/FrontEnd/FrontEnd.csproj", "/property:GenerateFullPaths=true", "/consoleloggerparameters:NoSummary" ], "problemMatcher": "$msCompile" }, { "label": "publish", "command": "dotnet", "type": "process", "args": [ "publish", "${workspaceFolder}/FrontEnd/FrontEnd.csproj", "/property:GenerateFullPaths=true", "/consoleloggerparameters:NoSummary" ], "problemMatcher": "$msCompile" }, { "label": "watch", "command": "dotnet", "type": "process", "args": [ "watch", "run", "${workspaceFolder}/FrontEnd/FrontEnd.csproj", "/property:GenerateFullPaths=true", "/consoleloggerparameters:NoSummary" ], "problemMatcher": "$msCompile" }, { "label": "daprd-frontend", "command": "daprd", "args": [ "-app-id", "frontend", "-app-port", "5001", "-dapr-http-port", "3501", "-placement-host-address", "localhost:6050", "-components-path", "C:\\Users\\chesterychen\\.dapr\\components" ], "isBackground": true, "problemMatcher": { "pattern": [ { "regexp": ".", "file": 1, "location": 2, "message": 3 } ], "background": { "beginsPattern": "^.*starting Dapr Runtime.*", "endsPattern": "^.*waiting on port.*" } }, "dependsOn": "build" }, ] }
因為沒有使用 dapr run* cli 命令， 所以運行 daprd list 命令將不會顯示當前正在運行的應用串列，
3.除錯
在StateController.GetAsync中新增斷點，運行并呼叫http://192.168.43.94:3501/v1.0/invoke/frontend/method/State，
4.不用vscode除錯
cmd運行以下命令，監聽5001埠
daprd run -dapr-http-port 3501 -app-port 5001 -app-id frontend -placement-host-address localhost:6050 -components-path C:\\Users\\chesterychen\\.dapr\\components
然后直接vs運行專案，即可除錯
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標籤：.NET Core