resolves #46379

resolves MicrosoftDocs/azure-docs#46379

Author: mikeurnun

articles/azure-functions/functions-bindings-expressions-patterns.md

@@ -127,7 +127,19 @@ public static void Run(
 
 ```
 
-You can also create expressions for parts of the file name such as the extension. For more information on how to use expressions and patterns in the Blob path string, see the [Storage blob binding reference](functions-bindings-storage-blob.md).
+You can also create expressions for parts of the file name. In the following example, function is triggered only on file names that match a pattern: `anyname-anyfile.csv`
+
+```json
+{
+    "name": "myBlob",
+    "type": "blobTrigger",
+    "direction": "in",
+    "path": "testContainerName/{date}-{filetype}.csv",
+    "connection": "OrderStorageConnection"
+}
+```
+
+For more information on how to use expressions and patterns in the Blob path string, see the [Storage blob binding reference](functions-bindings-storage-blob.md).
 
 ## Trigger metadata