C#对Excel的一些操作【一】

C#操作Excel的方式多种多样，以下为个人实践中的一些总结，留个笔记方便以后查看，陆续更新中。。。

进入正题：

一：将Excel的数据直接导入到SQL数据库中

这个需要Excel文件与数据库中的表的字段一致，或者指定每一个字段也行；
首先读取Excel里面的内容：

string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; " + "Data Source =" + this.txtPath.Text + ";Extended Properties=Excel 8.0";            OleDbConnection myConn = new OleDbConnection(strCon);            string sql = "SELECT * FROM [Sheet1$]";            try            {                myConn.Open();                OleDbDataAdapter oda = new OleDbDataAdapter(sql, myConn);                oda.Fill(ds, "[Sheet1$]");                myConn.Close();                this.dataGridView1.DataSource = ds.Tables[0];            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }

然后循环将每一条数据Insert到数据库中：

 string connectionString = @"server=SQL2008; database=ExcelDB; uid=sa;pwd=123123";            SqlConnection con = new SqlConnection(connectionString);            DataGrid mygrid = new DataGrid();            mygrid.SetDataBinding(ds, "[Sheet1$]");            int num = ds.Tables[0].Rows.Count;            for (int i = 0; i < num; i++)            {                string value1 = mygrid[i, 0].ToString();                string value2 = mygrid[i, 1].ToString();                string value3 = mygrid[i, 2].ToString();                string value4 = mygrid[i, 3].ToString();                string value5 = mygrid[i, 4].ToString();                string strsql = "INSERT INTO tb_01 VALUES('" + value1 + "','" + value2 + "','" + value3 + "','" + value4 + "','" + value5 + "')";                con.Open();                SqlCommand cmd = new SqlCommand(strsql, con);                cmd.ExecuteNonQuery();                con.Close();            }

 

二：将SQL数据库中的数据写入到Excel
通常有很多报表会要求将后台的数据写入到一个固定的模板文件中，那么可以这样操作：

 using Excel = Microsoft.Office.Interop.Excel;            Excel.Application xApp = new Excel.ApplicationClass();            Excel.Workbook xBook = xApp.Workbooks._Open(txtPath.Text.Trim(),              Missing.Value, Missing.Value, Missing.Value, Missing.Value              , Missing.Value, Missing.Value, Missing.Value, Missing.Value              , Missing.Value, Missing.Value, Missing.Value, Missing.Value);            Excel.Worksheet xSheet = (Excel.Worksheet)xBook.Sheets[1];            Excel.Range rng1 = xSheet.get_Range("A1", Missing.Value);            rng1.Value2 = this.txt01.Text.Trim();            Excel.Range rng2 = xSheet.get_Range("B1", Missing.Value);            rng2.Value2 = this.txt02.Text.Trim();            Excel.Range rng3 = xSheet.get_Range("C1", Missing.Value);            rng3.Value2 = this.txt03.Text.Trim();            Excel.Range rng4 = xSheet.get_Range("D1", Missing.Value);            rng4.Value2 = this.txt04.Text.Trim();            xBook.Save();            xApp.Quit();

A1,B1,C1,D1就是Excel里面的单元格坐标，这个根据要求可以任意更改，
Excel操作完成之后务必要将其退出来，不然服务器上面Excel的进程会
越来越多。

三.将WinForm里面DataGridView的数据导出到Excel里面。
该实例将所有的数据放到一个数组里面，然后再从数组里面导入到Excel，在速度上确实挺快的，
直接从DataGridView里面导入的话10000条数据大约要1分钟左右，但是从数组里面导出去的话
只有2秒钟不到的样子。

if (this.dataGridView1.Rows.Count > 0)            {                DateTime dt = DateTime.Now;               //导出Excel表时间                string title = "XXX报表  导出时间：" + dt.ToString(); //excel表头                Microsoft.Office.Interop.Excel.Application ep = new Microsoft.Office.Interop.Excel.ApplicationClass();                ep.Application.Workbooks.Add(true);                ep.get_Range("A1", "Z1").MergeCells = true;   //合并第一行                ep.Cells[1, 1] = title;                       //Excel添加表头到第一个单元格                ep.get_Range("A1", "Z1").MergeCells = true;   //合并第一行                ep.get_Range("A1", "Z1").HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignLeft; //表头居左                ep.get_Range("A1", "Z1").Font.Name = "宋体";    //设置字体                ep.get_Range("A1", "Z1").Font.Bold = true;                ep.get_Range("A1", "Z1").Font.Size = 15;        //文字大小                ep.get_Range("A1", "Z1").RowHeight = 35;        //设置标题行高                //列标题设置（字段，Excel表的第二行，从dataGridView1字段中获取）                for (int i = 1; i <= 5; i++)                {                    ep.Cells[2, i] = dataGridView1.Columns[i - 1].HeaderText.ToString();                }                ep.get_Range("A2", "Z2").Font.Name = "宋体";    //设置字体                ep.get_Range("A2", "Z2").Font.Bold = true;      //字体加粗                ep.get_Range("A2", "Z2").Font.Size = 10;        //文字大小                ep.get_Range("A2", "Z2").RowHeight = 20;        //设置标题行高                int rowCount = 0;                for (int i = 0; i < dataGridView1.Rows.Count; i++)    //统计dataGridView1有效行                {                    if (dataGridView1.Rows[i].Cells[0].Value.ToString() == "")                    {                        break;                    }                    else                    {                        rowCount++;                    }                }                string[,] dataArray = new string[rowCount, 5];                for (int i = 0; i < rowCount; i++)                {                    for (int j = 0; j < 5; j++)                    {                        dataArray[i, j] = dataGridView1.Rows[i].Cells[j].Value.ToString();                    }                }                ep.get_Range("A3", ep.Cells[rowCount + 2, 5]).Value2 = dataArray;     //填充数据                ep.get_Range("A2", ep.Cells[rowCount + 2, 2]).WrapText = true;      //设置文字自动换行                ep.get_Range("A2", ep.Cells[rowCount + 2, 5]).Font.Size = 10;       //字体大小设置                string strRange = "2:" + Convert.ToString(rowCount + 2);                ((Microsoft.Office.Interop.Excel.Range)ep.Rows[strRange, System.Type.Missing]).RowHeight = 40;   //所有行高为40                      ep.get_Range("A2", ep.Cells[rowCount + 2, 2 + 5]).EntireColumn.AutoFit();                ep.get_Range("A2", ep.Cells[rowCount + 2, 5]).Borders.LineStyle = 1;                SaveFileDialog saveFileDialog1 = new SaveFileDialog();                saveFileDialog1.FileName = DateTime.Now.ToLocalTime().ToString("yyyyMMddHHmmss");                saveFileDialog1.DefaultExt = "xls";                saveFileDialog1.Filter = " Excel files(*.xls)|*.xls|All files(*.*)|*.*";                saveFileDialog1.Title = "保存数据";                saveFileDialog1.FilterIndex = 2;                saveFileDialog1.RestoreDirectory = true;                if (saveFileDialog1.ShowDialog() == DialogResult.OK)                {                    ep.Workbooks[1].SaveAs(saveFileDialog1.FileName, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);                }                ep.Workbooks.Close();                ep.Quit();                MessageBox.Show(DateTime.Now.ToLocalTime().ToString("yyyyMMddHHmmss") + "的资料保存成功", "提示", MessageBoxButtons.OK);            }            else            {                MessageBox.Show("没有可导出数据");            }

 

四.将后台数据转换为图表格式

using Excel = Microsoft.Office.Interop.Excel; Excel.Application ThisApplication = null;Excel.Workbooks m_objBooks = null;Excel._Workbook ThisWorkbook = null;Excel.Worksheet xlSheet = null;  string strCon = @"server=sql2008;database=exceldb;uid=sa;pwd=123123";        private void FrmChart_Load(object sender, EventArgs e)        {            SqlConnection con = new SqlConnection(strCon);            DataSet ds = new DataSet();            con.Open();            SqlDataAdapter da = new SqlDataAdapter("select * from tb_02", con);            da.Fill(ds, "tb_02");            this.dataGridView1.DataSource = ds.Tables[0];            con.Close();                   }   private void CreateDatasheet()        {            xlSheet = (Excel.Worksheet)ThisWorkbook.                Worksheets.Add(Type.Missing, ThisWorkbook.ActiveSheet,                Type.Missing, Type.Missing);            xlSheet.Name = "DataList";        }        private void CreateData()        {                       for (int i = 1; i <= 12; i++)            {                xlSheet.Cells[i, 1] = dataGridView1.Rows[i - 1].Cells[1].Value.ToString();                xlSheet.Cells[i, 2] = dataGridView1.Rows[i-1].Cells[4].Value.ToString();            }        } private void btnCreateChart_Click(object sender, EventArgs e)        {            try            {                ThisApplication = new Excel.Application();                m_objBooks = (Excel.Workbooks)ThisApplication.Workbooks;                ThisWorkbook = (Excel._Workbook)(m_objBooks.Add(Type.Missing));                ThisApplication.DisplayAlerts = false;                                this.CreateDatasheet();                this.CreateData();                CreateChart();                ThisWorkbook.SaveAs(@"C:\TEST.xls", Type.Missing, Type.Missing,                            Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange,                        Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }            finally            {                ThisWorkbook.Close(Type.Missing, Type.Missing, Type.Missing);                ThisApplication.Workbooks.Close();                ThisApplication.Quit();                System.Runtime.InteropServices.Marshal.ReleaseComObject(ThisWorkbook);                System.Runtime.InteropServices.Marshal.ReleaseComObject(ThisApplication);                ThisWorkbook = null;                ThisApplication = null;                GC.Collect();                this.Close();            }        } private void CreateChart(){Excel.Chart xlChart = (Excel.Chart)ThisWorkbook.Charts.Add(Type.Missing, xlSheet, Type.Missing, Type.Missing);Excel.Range cellRange = (Excel.Range)xlSheet.Cells[1, 1];xlChart.ChartWizard(cellRange.CurrentRegion,Excel.XlChartType.xl3DColumn, Type.Missing,Excel.XlRowCol.xlColumns, 1, 0, true,"Prod OutPut", "Month", "OutPut","");xlChart.Name = "Chart";Excel.ChartGroup grp = (Excel.ChartGroup)xlChart.ChartGroups(1);grp.GapWidth = 20;grp.VaryByCategories = true;Excel.Series s = (Excel.Series)grp.SeriesCollection(1);s.BarShape = XlBarShape.xlCylinder;s.HasDataLabels = true;xlChart.Legend.Position = XlLegendPosition.xlLegendPositionTop;xlChart.ChartTitle.Font.Size = 24;xlChart.ChartTitle.Shadow = true;xlChart.ChartTitle.Border.LineStyle = Excel.XlLineStyle.xlContinuous;Excel.Axis valueAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlValue, XlAxisGroup.xlPrimary);valueAxis.AxisTitle.Orientation = -90;Excel.Axis categoryAxis = (Excel.Axis)xlChart.Axes(Excel.XlAxisType.xlCategory, XlAxisGroup.xlPrimary);}