如何提高.NET窗口应用程序中保存多行的效率？

Question

在我的.NET Windows应用程序中,我需要每次插入大约1000万个数据.但是,根据我的低效代码,保存到SQL服务器需要5分钟以上.有任何最佳方法可以最大限度地减少保存这些数据所需的时间？

private void saveAllDataInGrid()
    {
        int rowCount = dataGridView1.RowCount;

        String str = "server=DESKTOP-TDV8JQ7;database=ExcelFileApp;Integrated Security=SSPI";
        SqlConnection con = new SqlConnection(str);
        con.Open();
        for (int count = 0; count < rowCount; count++)
        {
            try
            {
                String query = "insert into TemMainTable values (@p1,@p2,@p3,@p4,@p5,@p6,@p7,@p8,@p9,@p10,@p11,@p12,@p13,@p14,@p15,@p16,@p17,@p18,@p19,@p20,@p21,@p22,@p23)";
                SqlCommand cmd = new SqlCommand(query, con);

                cmd.Parameters.AddWithValue("@p1", dataGridView1.Rows[count].Cells[0].Value.ToString());
                cmd.Parameters.AddWithValue("@p2", dataGridView1.Rows[count].Cells[1].Value.ToString());
                cmd.Parameters.AddWithValue("@p3", dataGridView1.Rows[count].Cells[2].Value.ToString());
                cmd.Parameters.AddWithValue("@p4", dataGridView1.Rows[count].Cells[3].Value.ToString());
                cmd.Parameters.AddWithValue("@p5", dataGridView1.Rows[count].Cells[4].Value.ToString());
                cmd.Parameters.AddWithValue("@p6", dataGridView1.Rows[count].Cells[5].Value.ToString());
                cmd.Parameters.AddWithValue("@p7", dataGridView1.Rows[count].Cells[6].Value.ToString());
                cmd.Parameters.AddWithValue("@p8", dataGridView1.Rows[count].Cells[7].Value.ToString());
                cmd.Parameters.AddWithValue("@p9", dataGridView1.Rows[count].Cells[8].Value.ToString());
                cmd.Parameters.AddWithValue("@p10", dataGridView1.Rows[count].Cells[9].Value.ToString());
                cmd.Parameters.AddWithValue("@p11", dataGridView1.Rows[count].Cells[10].Value.ToString());
                cmd.Parameters.AddWithValue("@p12", dataGridView1.Rows[count].Cells[10].Value.ToString());
                cmd.Parameters.AddWithValue("@p13", dataGridView1.Rows[count].Cells[12].Value.ToString());
                cmd.Parameters.AddWithValue("@p14", dataGridView1.Rows[count].Cells[13].Value.ToString());
                cmd.Parameters.AddWithValue("@p15", dataGridView1.Rows[count].Cells[14].Value.ToString());
                cmd.Parameters.AddWithValue("@p16", dataGridView1.Rows[count].Cells[15].Value.ToString());
                cmd.Parameters.AddWithValue("@p17", dataGridView1.Rows[count].Cells[16].Value.ToString());
                cmd.Parameters.AddWithValue("@p18", dataGridView1.Rows[count].Cells[17].Value.ToString());
                cmd.Parameters.AddWithValue("@p19", dataGridView1.Rows[count].Cells[18].Value.ToString());
                cmd.Parameters.AddWithValue("@p20", dataGridView1.Rows[count].Cells[19].Value.ToString());
                cmd.Parameters.AddWithValue("@p21", dataGridView1.Rows[count].Cells[20].Value.ToString());
                cmd.Parameters.AddWithValue("@p22", dataGridView1.Rows[count].Cells[21].Value.ToString());
                cmd.Parameters.AddWithValue("@p23", dataGridView1.Rows[count].Cells[22].Value.ToString());

                int i = cmd.ExecuteNonQuery();

                lblDataSaved.Text = "No of rows Saved : " + rowCount;
            }
            catch (Exception es)
            {
                MessageBox.Show(es.Message);
            }
        }
        con.Close();
        MessageBox.Show("Successfully Saved");
    }

谢谢!!

Answer 1

您可以使用User-Defined Table Types批量插入.您需要User-Defined Table Types在数据库中创建一个SQL Server Management Studio >> Programability >> User-Defined Table Types

SQL脚本语法将像这样创建 User-Defined Table Types

CREATE TYPE [dbo].[TableList] AS TABLE(
    [SampleColumn1] [bigint] NOT NULL,
    [SampleColumn2] [nvarchar](100) NOT NULL    
)

Sample SQL Insert Query将如下所示 -

INSERT  INTO SampleTable
        ( SampleColumn1 ,
          SampleColumn2

        )
        SELECT  cusTbl.SampleColumn1 ,
                cusTbl.SampleColumn2
        FROM    @TableList AS cusTbl;

在C#代码中 - 要插入的常规语法如下 -

SqlCommand cmd = new SqlCommand(query, con);    
var tvparam = cmd.Parameters.AddWithValue("@TableList", tableList);
tvparam.SqlDbType = SqlDbType.Structured;
tvparam.TypeName = "dbo.TableList" 
cmd.Connection.Open();
cmd.ExecuteNonQuery();

注意:您已DataGridView在Windows应用程序中使用过.所以你可以很容易地传递DataTable你用来绑定它的东西DataGridView.请注意SQL Server数据库中DataTable具有相同ColumnName和DataType声明的内容User-Defined Table Types

我需要每次插入大约1000万个数据.但是,它需要超过5分钟.与将数据逐行 发送到SQL Server相比,插入的时间肯定会减少. 更多阅读在这里和在这个博客