将dataGridView行导出到Excel或SQL Server数据库的最快方法是什么

Question

什么是将460328 - 800328范围内的DataGridView行导出到Excel或SQL Server数据库表中而不使用Microsoft Office互操作作为互操作的最快方法是在系统资源上非常缓慢和繁重？

Answer 1

对于导出到Excel,如果您不使用基于XML的2007或2010,Interop几乎是唯一的出路.尽管如此,它并没有它的声誉那么糟糕.我将列出一些解决方案.

1到Excel

首先将Microsoft.Office.Interop.Excel组件引用添加到项目中.这应该在Project - > Add Reference中的.NET选项卡下.将using语句添加到表单中:

使用Excel = Microsoft.Office.Interop.Excel;

添加一个按钮控件,并将此代码添加到它的正文中:

    private void btnExport_Click(object sender, EventArgs e)
    {

        Excel.Application app = new Excel.Application();
        app.Visible = true;
        Excel.Workbook wb = app.Workbooks.Add(1);
        Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets[1];
        // changing the name of active sheet
        ws.Name = "Exported from gridview";

        ws.Rows.HorizontalAlignment = HorizontalAlignment.Center;
        // storing header part in Excel
        for (int i = 1; i < dataGridView1.Columns.Count + 1; i++)
        {
            ws.Cells[1, i] = dataGridView1.Columns[i - 1].HeaderText;
        }


        // storing Each row and column value to excel sheet
        for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
        {
            for (int j = 0; j < dataGridView1.Columns.Count; j++)
            {
                ws.Cells[i + 2, j + 1] = dataGridView1.Rows[i].Cells[j].Value.ToString();
            }
        }

        // sizing the columns
        ws.Cells.EntireColumn.AutoFit();

        // save the application
        wb.SaveAs("c:\\output.xls",Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive , Type.Missing, Type.Missing, Type.Missing, Type.Missing);

        // Exit from the application
       app.Quit();
    }
}

2 - 到SQL Server

这不需要互操作.为了便于使用,将List对象传递给执行插入的事件.如果您将表设置为与网格视图列对应,则很容易.在这里,我使用了一个sproc.

    private void btnToSQL_Click(object sender, EventArgs e)
    {
        string connStr = @"Data Source=(local)\sqlexpress;Initial Catalog=rTALIS;Integrated Security=True";
        var cn = new SqlConnection(connStr);
        var cm = new SqlCommand("exec usp_InsertRecord", cn);
        cm.CommandType = System.Data.CommandType.StoredProcedure;
        try
        {
            cn.Open();
            foreach (Row r in rows)
            {
                cm.Parameters.Clear();
                cm.Parameters.AddWithValue("@Number1", r.Number1);
                cm.Parameters.AddWithValue("@Number2", r.Number2);
                cm.Parameters.AddWithValue("@Number3", r.Number3);
                cm.Parameters.AddWithValue("@Number4", r.Number4);
                cm.Parameters.AddWithValue("@Number5", r.Number5);
                cm.Parameters.AddWithValue("@Number6", r.Number6);
                cm.Parameters.AddWithValue("@Number7", r.Number7);
                cm.Parameters.AddWithValue("@Date1", r.Date1);
                cm.ExecuteNonQuery();
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
        finally
        {
            cn.Close();
        }
    }

如果我需要为您调整此信息,请告诉我.在原始示例中,我有List rows = new List(); 在form_Load方法中声明.这适用于该解决方案,但它的范围现在太有限了.我已将它向上/向上移动到类中,以便可以在窗体上的任何位置调用(特别是btnToSQL_Click).我在下面评论过:

    List<Row> rows = new List<Row>();

    private void Form1_Load(object sender, EventArgs e)
    {
        //var rows = new List<Row>();  //limited scope
        var sr = new StreamReader(@"C:\so_test.txt");
        while (!sr.EndOfStream)
        {
            string s = sr.ReadLine();
            if (!String.IsNullOrEmpty(s.Trim()))
            {
                rows.Add(new Row(s));
            }
        }
        sr.Close();
        dataGridView1.DataSource = rows;
    }