feat: support Files List, Get, Upload, Download, Delete

PiperOrigin-RevId: 839889197

Author: yyyu-google

DemoApp/Files/Files.cs

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using Google.GenAI;
+using Google.GenAI.Types;
+
+public class Files {
+  public static async Task SendRequestAsync() {
+    string apiKey = System.Environment.GetEnvironmentVariable("GOOGLE_API_KEY");
+    var geminiClient = new Client(apiKey: apiKey);
+    try {
+      var uploadResponse1 = await geminiClient.Files.UploadAsync(filePath: "./google.png");
+      Console.WriteLine("Gemini API Files UploadAsync Response from file path for png:");
+      Console.WriteLine(uploadResponse1);
+
+      var uploadResponse2 = await geminiClient.Files.UploadAsync(filePath: "./google.jpg");
+      Console.WriteLine("Gemini API Files UploadAsync Response from file path for jpg:");
+      Console.WriteLine(uploadResponse2);
+
+      var uploadResponse3 = await geminiClient.Files.UploadAsync(filePath: "./story.txt");
+      Console.WriteLine("Gemini API Files UploadAsync Response from file path for txt:");
+      Console.WriteLine(uploadResponse3);
+
+      var uploadResponse4 = await geminiClient.Files.UploadAsync(filePath: "./story.pdf");
+      Console.WriteLine("Gemini API Files UploadAsync Response from file path for pdf:");
+      Console.WriteLine(uploadResponse4);
+
+      var uploadResponse5 = await geminiClient.Files.UploadAsync(filePath: "./pixel.m4a");
+      Console.WriteLine("Gemini API Files UploadAsync Response from file path for m4a:");
+      Console.WriteLine(uploadResponse5);
+
+      byte[] fileBytes = await System.IO.File.ReadAllBytesAsync("./google.png");
+      var uploadResponse6 = await geminiClient.Files.UploadAsync(
+          bytes: fileBytes,
+          fileName: "google.png"
+      );
+      Console.WriteLine("Gemini API Files UploadAsync Response from bytes:");
+      Console.WriteLine(uploadResponse6);
+
+
+      var pager = await geminiClient.Files.ListAsync();
+      await foreach (var page in pager) {
+        Console.WriteLine("Gemini API Files ListAsync Response page:");
+        Console.WriteLine(page);
+      }
+
+      string fileName = uploadResponse6.Name.ToString();
+      Console.WriteLine($"File name: {fileName}");
+      var getResponse = await geminiClient.Files.GetAsync(name: fileName);
+      Console.WriteLine("Gemini API Files GetAsync Response GetAsync:");
+      Console.WriteLine(getResponse);
+
+      var deleteResponse = await geminiClient.Files.DeleteAsync(name: fileName);
+      Console.WriteLine("Gemini API Files DeleteAsync Response deleted file:");
+      Console.WriteLine(deleteResponse);
+    } catch (HttpRequestException ex) {
+      Console.WriteLine($"An error occurred with Gemini API: {ex.ToString()}");
+    }
+  }
+}

DemoApp/Files/Files.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Google.GenAI\Google.GenAI.csproj" />
+  </ItemGroup>
+
+</Project>

DemoApp/Files/Program.cs

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+/*
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/// <summary>
+/// The main entry point for the application.
+/// </summary>
+public class Program
+{
+  /// <summary>
+  /// Runs the Files features of the SDK.
+  /// </summary>
+  /// <param name="args">Command-line arguments (not used).</param>
+  public static async Task Main(string[] args)
+  {
+    try
+    {
+      await Files.SendRequestAsync();
+    }
+    catch (Exception ex)
+    {
+      Console.WriteLine($"A critical error occurred: {ex.Message}");
+    }
+  }
+}

DemoApp/Files/README.md

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+1. assume you are in the directory of this README file.
+2. set your Google AI Studio api key to env var `GOOGLE_API_KEY`.
+3. run `dotnet run`