C#操作Excel

1.System.Data.DataTable连接数据库

ExcelFile 是excel的完整路径

//OleDbConnection conExcel = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFile + ";Extended Properties=Excel 8.0");

            //if (conExcel.State == ConnectionState.Closed)

            //{

            //    conExcel.Open();

            //}

 

2.获取第一个sheet表名称

不建议写死，程序自动获取下也很快的

System.Data.DataTable dtTmp = conExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });

 string tableName = dtTmp.Rows[0][2].ToString().Trim();

 

3.获取datatable

"select * from [" + tableName + "]"

执行这个sql语句吧，剩下的就是datatable的操作了

根据DataTable可以获取各行各列的值，但似乎不稳定，有时只能获取空值而实际明明有值

 

4.com方式打开excel

需引用Microsoft.Office.Interop.Excel

 

object missing = System.Type.Missing;

Application app = new ApplicationClass();

////打开excel，注意空参数不可以用null

Workbook wBook = app.Workbooks.Open(ExcelFile, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing);

 

                 app.Visible = false;

                //设置禁止弹出保存和覆盖的询问提示框

                app.DisplayAlerts = false;

                app.AlertBeforeOverwriting = false;

 

////打开第一个Worksheet

 Worksheet wSheet = wBook.Worksheets[1] as Worksheet;

////写值

wSheet.Cells[行, 列] = "你想写的值";

////获取cell的值，注意不可用wSheet.Cells[行, 列]获取，这样一般得到"System.__ComObject"

Range ra = wSheet.get_Range(wSheet.Cells[i, j], wSheet.Cells[i, j]); ////此处是单元格范围，自己决定多大

string sVal = ra.Text.ToString();

 

////判断单元格是否有公式

ra.Formula.ToString().IndexOf("=") >= 0

 

////设置excel单元格样式，很多的，自己百度下吧

////这个是设置单元格的边框宽度

Range range = wSheet.get_Range(wSheetDes.Cells[i, j], wSheetDes.Cells[i, j]);

                            range.Borders[XlBordersIndex.xlEdgeBottom].Weight = 2;

                            range.Borders[XlBordersIndex.xlEdgeLeft].Weight = 2;

                            range.Borders[XlBordersIndex.xlEdgeRight].Weight = 2;

                            range.Borders[XlBordersIndex.xlEdgeTop].Weight = 2;

 

Range range = wSheetDes.get_Range(wSheet.Cells[i, j], wSheet.Cells[i, j]);

range.Borders.LineStyle = Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous;

 

range.BorderAround(XlLineStyle.xlContinuous, XlBorderWeight.xlThin, XlColorIndex.xlColorIndexAutomatic, System.Drawing.Color.Black.ToArgb());

 

//保存工作簿，方法很多，自己决定怎么用

                wSheet.SaveAs(ExcelFile, missing, missing, missing, missing, missing, missing, missing, missing, missing);

                wBook.Save();

                app.Save(ExcelFile);

               app.SaveWorkspace(ExcelFile);

 

////退出，比较麻烦

           wBook.Close(true, missing, missing);

           wSheet = null;

            wBook = null;

            app.Quit();

            app = null;

            System.GC.Collect();

            System.GC.WaitForFullGCComplete();

全部关掉然后置为null，再强制垃圾回收即可

 

 

常用的大概这么多，应该够用了