Question

我有Azure timer function，可以将本地数据库中的数据复制到Azure托管数据库中。目前，我已经在函数中对表名进行了硬编码。

如果对它进行硬编码，可以将参数作为输入传递给函数吗？

public static void Run([TimerTrigger("0 */1 * * * *")]TimerInfo myTimer, TraceWriter log) {
            string srcConnection = @"on premises connecting string";
            string destConnection = @"Azure managed instance connection string";

            string srcTable = "SourceTableName"; //am trying to make this as parameter
            string destTable = "DestinationTableName"; //am trying to make this as parameter
            string tmpTable = "select top 0 * into #DestTable from " + destTable;

            using(SqlConnection
                        srcConn = new SqlConnection(srcConnection),
                        destConn = new SqlConnection(destConnection)
                    ) {
                using(SqlCommand
                        srcGetCmd = new SqlCommand(srcTable, srcConn)
                    ) {
                    srcConn.Open();

                    destConn.Open();

                    SqlCommand cmd = new SqlCommand(tmpTable, destConn);
                    cmd.CommandTimeout = 180;
                    cmd.ExecuteNonQuery();
                    log.Info($"Temp table generated at: {DateTime.Now}");

                    SqlDataReader reader = srcGetCmd.ExecuteReader();
                    log.Info($"Source data loaded at: {DateTime.Now}");

                    using(SqlBulkCopy bulk = new SqlBulkCopy(destConn)) {
                        bulk.DestinationTableName = "#DestTable";
                        bulk.WriteToServer(reader);
                    }

                    string mergeSql = @"<sql logic to insert/Update/delete the data>";

                    cmd.CommandText = mergeSql;
                    cmd.CommandTimeout = 180;
                    cmd.ExecuteNonQuery();
                    log.Info($"Data update from temp table to destination at: {DateTime.Now}");

                    //Execute the command to drop temp table
                    cmd = new SqlCommand("drop table #DestTable", destConn);
                    cmd.CommandTimeout = 180;
                    cmd.ExecuteNonQuery();
                    log.Info($"Drop temp table at: {DateTime.Now}");

                    srcConn.Close();
                    destConn.Close();
                }
            }
            log.Info($"C# Timer trigger function executed at: {DateTime.Now}");

        }

如您所见，我已经对表名进行了硬编码，可以将其设置为参数吗？

Answer 1

最简单的方法是使用这些名称（例如“ SourceTableName”）添加“应用程序设置”，然后从Environment获取它们：

string srcTable = Environment.GetEnvironmentVariable("SourceTableName");

要使其真正成为参数，您需要创建一个自定义绑定，类似于我在Authoring a Custom Binding for Azure Functions中所做的。可能有点矫kill过正。

如何将参数传递给Azure函数

1 个答案: