C#：SQL Server ADO.NET 連線

示範如何使用 ADO.NET System.Data.Common 套件，開啟及關閉與 SQL Server 適用的 Cloud SQL 的連線，藉此執行 SQL INSERT 陳述式。

程式碼範例

C#

如要向 SQL Server 適用的 Cloud SQL 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

insertTimestamp = DateTime.UtcNow;
try
{
    using(var connection = new SqlConnection(_connectionString.ConnectionString))
    { 
        connection.OpenWithRetry();
        // Insert a vote for SPACE or TAB with a timestamp.
        using (var insertVoteCommand = connection.CreateCommand())
        {
            insertVoteCommand.CommandText =
                @"INSERT INTO votes (candidate, time_cast) VALUES (@candidate, @time_cast)";
            var candidate = insertVoteCommand.CreateParameter();
            candidate.ParameterName = "@candidate";
            candidate.DbType = DbType.String;
            candidate.Value = team;
            insertVoteCommand.Parameters.Add(candidate);
            var timeCast = insertVoteCommand.CreateParameter();
            timeCast.ParameterName = "@time_cast";
            timeCast.DbType = DbType.DateTime;
            timeCast.Value = insertTimestamp;
            insertVoteCommand.Parameters.Add(timeCast);
            await insertVoteCommand.ExecuteNonQueryAsync();
        }
    }
    return Content($"Vote successfully cast for '{team}' at time {insertTimestamp}!");
}
catch (Exception ex)
{
    // If something goes wrong, handle the error in this
    // section. This might involve retrying or adjusting
    // parameters depending on the situation.
    return StatusCode((int)HttpStatusCode.InternalServerError, ex);
}

後續步驟

如要搜尋及篩選其他 Google Cloud 產品的程式碼範例，請參閱Google Cloud 範例瀏覽器。