1# PowerShell — Azure Functions Triggers & Bindings
2 
3> **Model**: PowerShell uses `function.json` for binding definitions + `run.ps1` for handler code.
4> Each function lives in its own directory: `<FunctionName>/function.json` + `run.ps1`
5 
6## Project Structure
7 
8```
9src/
10├── host.json
11├── local.settings.json
12├── requirements.psd1
13├── profile.ps1
14├── HttpFunction/
15│   ├── function.json
16│   └── run.ps1
17└── TimerFunction/
18    ├── function.json
19    └── run.ps1
20```
21 
22## HTTP Trigger
23 
24**function.json:**
25```json
26{
27  "bindings": [
28    { "authLevel": "anonymous", "type": "httpTrigger", "direction": "in",
29      "name": "Request", "methods": ["get", "post"] },
30    { "type": "http", "direction": "out", "name": "Response" }
31  ]
32}
33```
34 
35**run.ps1:**
36```powershell
37param($Request, $TriggerMetadata)
38$name = $Request.Query.Name
39Push-OutputBinding -Name Response -Value ([HttpResponseContext]@{
40    StatusCode = [HttpStatusCode]::OK
41    Body = "Hello, $name!"
42})
43```
44 
45## Blob Storage
46 
47**function.json:**
48```json
49{
50  "bindings": [
51    { "name": "InputBlob", "type": "blobTrigger", "direction": "in",
52      "path": "samples-workitems/{name}", "connection": "AzureWebJobsStorage" },
53    { "name": "OutputBlob", "type": "blob", "direction": "out",
54      "path": "output/{name}", "connection": "AzureWebJobsStorage" }
55  ]
56}
57```
58 
59**run.ps1:**
60```powershell
61param($InputBlob, $TriggerMetadata)
62Write-Host "Blob: $($TriggerMetadata.Name), Size: $($InputBlob.Length)"
63Push-OutputBinding -Name OutputBlob -Value $InputBlob
64```
65 
66## Queue Storage
67 
68**function.json:**
69```json
70{
71  "bindings": [
72    { "name": "QueueItem", "type": "queueTrigger", "direction": "in",
73      "queueName": "myqueue-items", "connection": "AzureWebJobsStorage" },
74    { "name": "OutputQueue", "type": "queue", "direction": "out",
75      "queueName": "outqueue", "connection": "AzureWebJobsStorage" }
76  ]
77}
78```
79 
80**run.ps1:**
81```powershell
82param($QueueItem, $TriggerMetadata)
83Write-Host "Queue message: $QueueItem"
84Push-OutputBinding -Name OutputQueue -Value "Processed: $QueueItem"
85```
86 
87## Timer
88 
89**function.json:**
90```json
91{
92  "bindings": [
93    { "name": "Timer", "type": "timerTrigger", "direction": "in",
94      "schedule": "0 */5 * * * *" }
95  ]
96}
97```
98 
99**run.ps1:**
100```powershell
101param($Timer)
102Write-Host "Timer triggered at: $(Get-Date)"
103```
104 
105## Event Grid
106 
107**function.json:**
108```json
109{
110  "bindings": [
111    { "name": "EventGridEvent", "type": "eventGridTrigger", "direction": "in" }
112  ]
113}
114```
115 
116**run.ps1:**
117```powershell
118param($EventGridEvent, $TriggerMetadata)
119Write-Host "Event: $($EventGridEvent.subject) - $($EventGridEvent.eventType)"
120```
121 
122## Cosmos DB
123 
124**function.json:**
125```json
126{
127  "bindings": [
128    { "name": "Documents", "type": "cosmosDBTrigger", "direction": "in",
129      "connectionStringSetting": "CosmosDBConnection", "databaseName": "mydb",
130      "containerName": "mycontainer", "createLeaseContainerIfNotExists": true },
131    { "name": "OutputDoc", "type": "cosmosDB", "direction": "out",
132      "connectionStringSetting": "CosmosDBConnection", "databaseName": "mydb",
133      "containerName": "outcontainer" }
134  ]
135}
136```
137 
138**run.ps1:**
139```powershell
140param($Documents, $TriggerMetadata)
141foreach ($doc in $Documents) {
142    Write-Host "Changed doc: $($doc.id)"
143}
144```
145 
146## Service Bus
147 
148**function.json:**
149```json
150{
151  "bindings": [
152    { "name": "Message", "type": "serviceBusTrigger", "direction": "in",
153      "queueName": "myqueue", "connection": "ServiceBusConnection" },
154    { "name": "OutputMessage", "type": "serviceBus", "direction": "out",
155      "queueName": "outqueue", "connection": "ServiceBusConnection" }
156  ]
157}
158```
159 
160**run.ps1:**
161```powershell
162param($Message, $TriggerMetadata)
163Write-Host "Message: $Message"
164Push-OutputBinding -Name OutputMessage -Value "Processed: $Message"
165```
166 
167## Event Hubs
168 
169**function.json:**
170```json
171{
172  "bindings": [
173    { "name": "Events", "type": "eventHubTrigger", "direction": "in",
174      "eventHubName": "myeventhub", "connection": "EventHubConnection",
175      "cardinality": "many" }
176  ]
177}
178```
179 
180## Table Storage
181 
182**function.json:**
183```json
184{
185  "bindings": [
186    { "name": "TableEntity", "type": "table", "direction": "in",
187      "tableName": "mytable", "partitionKey": "{pk}", "rowKey": "{rk}",
188      "connection": "AzureWebJobsStorage" },
189    { "name": "TableOut", "type": "table", "direction": "out",
190      "tableName": "mytable", "connection": "AzureWebJobsStorage" }
191  ]
192}
193```
194 
195## SQL
196 
197**function.json:**
198```json
199{
200  "bindings": [
201    { "name": "Changes", "type": "sqlTrigger", "direction": "in",
202      "tableName": "dbo.MyTable", "connectionStringSetting": "SqlConnection" }
203  ]
204}
205```
206 
207## SendGrid
208 
209**function.json:**
210```json
211{
212  "bindings": [
213    { "name": "Mail", "type": "sendGrid", "direction": "out",
214      "apiKey": "SendGridApiKey", "from": "[email protected]" }
215  ]
216}
217```
218 
219> **Note**: PowerShell always requires `function.json` — it does not support inline binding definitions.
220 
221> Full reference: [Azure Functions PowerShell developer guide](https://learn.microsoft.com/en-us/azure/azure-functions/functions-reference-powershell)
222