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SqlBulkCopy.BulkCopyTimeout 屬性

定義

完成作業逾時前的秒數。

public:
 property int BulkCopyTimeout { int get(); void set(int value); };
public int BulkCopyTimeout { get; set; }
member this.BulkCopyTimeout : int with get, set
Public Property BulkCopyTimeout As Integer

屬性值

BulkCopyTimeout 屬性的整數值。 預設值為 30 秒。 值為 0 表示沒有限制;大量複製則會無限期等候。

範例

下列主控台應用程式示範如何在大量載入資料時,將逾時修改為 60 秒。 在此範例中,來源資料會先從SQL Server資料表讀取到 SqlDataReader 實例。 來源資料不一定位於 SQL Server;您可以使用可讀取至 或載入 至 IDataReaderDataTable 的任何資料來源。

重要

除非您已建立如 大量複製範例安裝程式中所述的工作資料表,否則不會執行此範例。 這個程式碼僅是為了示範使用 SqlBulkCopy 的語法而提供。 如果來源和目的地資料表位於相同的SQL Server實例中,使用 Transact-SQL INSERT … SELECT 語句來複製資料會比較簡單且更快速。

using Microsoft.Data.SqlClient;

class Program
{
    static void Main()
    {
        string connectionString = GetConnectionString();

        // Open a sourceConnection to the AdventureWorks database.
        using (SqlConnection sourceConnection =
                   new SqlConnection(connectionString))
        {
            sourceConnection.Open();

            // Perform an initial count on the destination table.
            SqlCommand commandRowCount = new SqlCommand(
                "SELECT COUNT(*) FROM " +
                "dbo.BulkCopyDemoMatchingColumns;",
                sourceConnection);
            long countStart = System.Convert.ToInt32(
                commandRowCount.ExecuteScalar());
            Console.WriteLine("Starting row count = {0}", countStart);

            // Get data from the source table as a SqlDataReader.
            SqlCommand commandSourceData = new SqlCommand(
                "SELECT ProductID, Name, " +
                "ProductNumber " +
                "FROM Production.Product;", sourceConnection);
            SqlDataReader reader =
                commandSourceData.ExecuteReader();

            // Create the SqlBulkCopy object using a connection string. 
            // In the real world you would not use SqlBulkCopy to move
            // data from one table to the other in the same database.
            using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connectionString))
            {
                bulkCopy.DestinationTableName =
                    "dbo.BulkCopyDemoMatchingColumns";

                // Set the timeout.
                bulkCopy.BulkCopyTimeout = 60;

                try
                {
                    // Write from the source to the destination.
                    bulkCopy.WriteToServer(reader);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
                finally
                {
                    // Close the SqlDataReader. The SqlBulkCopy
                    // object is automatically closed at the end
                    // of the using block.
                    reader.Close();
                }
            }

            // Perform a final count on the destination 
            // table to see how many rows were added.
            long countEnd = System.Convert.ToInt32(
                commandRowCount.ExecuteScalar());
            Console.WriteLine("Ending row count = {0}", countEnd);
            Console.WriteLine("{0} rows were added.", countEnd - countStart);
            Console.WriteLine("Press Enter to finish.");
            Console.ReadLine();
        }
    }

    private static string GetConnectionString()
    // To avoid storing the sourceConnection string in your code, 
    // you can retrieve it from a configuration file. 
    {
        return "Data Source=(local); " +
            " Integrated Security=true;" +
            "Initial Catalog=AdventureWorks;";
    }
}

備註

如果作業逾時,交易不會認可,而且所有複製的資料列都會從目的地資料表中移除。

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