在C#表单应用程序中使用不同的名称保存

// 保存为文本文件
string fileName = "data_" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".txt";
string filePath = @"C:\path\to\save\" + fileName;

// 写入数据到文件
string data = "Hello, World!";
File.WriteAllText(filePath, data);

// 从文件读取数据
string readData = File.ReadAllText(filePath);
Console.WriteLine(readData);

// 保存到数据库
string tableName = "data_table";
string connectionString = "Data Source=your_server;Initial Catalog=your_database;User ID=your_username;Password=your_password";

using (SqlConnection connection = new SqlConnection(connectionString))
{
    connection.Open();

    // 创建表（如果不存在）
    string createTableQuery = $"CREATE TABLE IF NOT EXISTS {tableName} (Id INT PRIMARY KEY IDENTITY, Data VARCHAR(255))";
    using (SqlCommand command = new SqlCommand(createTableQuery, connection))
    {
        command.ExecuteNonQuery();
    }

    // 插入数据
    string data = "Hello, World!";
    string insertQuery = $"INSERT INTO {tableName} (Data) VALUES (@Data)";
    using (SqlCommand command = new SqlCommand(insertQuery, connection))
    {
        command.Parameters.AddWithValue("@Data", data);
        command.ExecuteNonQuery();
    }

    // 查询数据
    string selectQuery = $"SELECT * FROM {tableName}";
    using (SqlCommand command = new SqlCommand(selectQuery, connection))
    {
        using (SqlDataReader reader = command.ExecuteReader())
        {
            while (reader.Read())
            {
                int id = (int)reader["Id"];
                string readData = (string)reader["Data"];
                Console.WriteLine($"Id: {id}, Data: {readData}");
            }
        }
    }
}

// 保存到腾讯云对象存储
string bucketName = "your_bucket";
string secretId = "your_secret_id";
string secretKey = "your_secret_key";
string region = "your_region";
string cosEndpoint = $"https://{bucketName}.cos.{region}.myqcloud.com";

string fileName = "data_" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".txt";
string filePath = @"C:\path\to\save\" + fileName;

// 初始化 COS 客户端
CosXmlConfig config = new CosXmlConfig.Builder()
    .SetRegion(region)
    .SetDebugLog(true)
    .Build();
CosXmlServer cosXml = new CosXmlServer(config, new DefaultQCloudCredentialProvider(secretId, secretKey));

// 上传文件
PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, fileName, filePath);
PutObjectResult putObjectResult = cosXml.PutObject(putObjectRequest);
Console.WriteLine("Upload success. ETag: " + putObjectResult.eTag);

// 下载文件
GetObjectRequest getObjectRequest = new GetObjectRequest(bucketName, fileName, @"C:\path\to\download\" + fileName);
GetObjectResult getObjectResult = cosXml.GetObject(getObjectRequest);
Console.WriteLine("Download success. ETag: " + getObjectResult.eTag);