导入Excel数据

using System;

using Microsoft.SharePoint;

using Microsoft.SharePoint.WebControls;

using Microsoft.Office.Interop.Excel;

using System.IO;

using System.Reflection;

using System.Web;

using System.Collections;

using System.Web.UI.WebControls;

using System.Collections.Generic;

using Microsoft.SharePoint.Administration;

using System.Data.OleDb;

using System.Data;

using System.Linq;

using System.Drawing;

using System.Data.SqlClient;



namespace MyDemo.Layouts.MyDemo

{

    public partial class Excel : LayoutsPageBase

    {

        string rootUrl = Common.rootUrl;//连接地址

        string strExcelConn;//Excel使用的Connction

            

        protected void Page_Load(object sender, EventArgs e)

        {

        }

        protected void ButImport_Click(object sender, EventArgs e)

        {

            if (FileUploadImport.HasFile)

            {

                string strLoginName = HttpContext.Current.User.Identity.Name.ToString();    //获取用户名

                string folderTemp = strLoginName.Substring(strLoginName.LastIndexOf('\\') + 1);

                SPSecurity.RunWithElevatedPrivileges(delegate()

                {

                    try

                    {

                        string FileException = System.IO.Path.GetExtension(FileUploadImport.FileName).ToLower();//选中文件的类型

                        //通过判断类型是否为xlsx和xls来判断是否为Excel文件

                        if (FileException == ".xlsx" || FileException == ".xls")

                        {

                            string FileFolder = Server.MapPath("~/_layouts/15/images/" + folderTemp + "Upfile/");//获取文件地址

                            if (!Directory.Exists(FileFolder))     //根目录 

                            {

                                Directory.CreateDirectory(FileFolder);//判断上传目录是否存在     自动创建 

                            }

                            string StrFilepath = FileFolder + FileUploadImport.FileName;//FileUpload文件路径

                            FileUploadImport.SaveAs(StrFilepath);//将导入文件保存在Web服务器上此路径

                            using (SPSite site = new SPSite(rootUrl))

                            {

                                //获取站点

                                SPWeb web = site.RootWeb;

                                SPList list = web.GetList(rootUrl + "/Lists/HomePage/AllItems.aspx");

                                //允许站点在GET请求上进行更新

                                web.AllowUnsafeUpdates = true;

                                //添加列表项                     

                                string strExcel = ExcelSheetName(StrFilepath)[0].ToString();//获取Excel表文件名

                                int ExcelRow = ExcelDataSource(StrFilepath, strExcel).Tables[0].Rows.Count;//获取Excel表中的行数

                                int ExcelColumn = ExcelDataSource(StrFilepath, strExcel).Tables[0].Columns.Count;//获取Excel表中的列数

                                try

                                {

                                    for (int i = 0; i < ExcelRow; i++)

                                    {

                                        SPListItem newItem = list.AddItem();

                                        for (int j = 0; j < ExcelColumn; j++)

                                        {

                                            newItem[ChangeRowName(list, ExcelDataSource(StrFilepath, strExcel).Tables[0].Columns[j].ColumnName)] = ExcelDataSource(StrFilepath, strExcel).Tables[0].Rows[i][j].ToString();

                                        }

                                        newItem.Update();

                                    }

                                }

                                catch (Exception ex)

                                {

                                    Page.ClientScript.RegisterStartupScript(Page.ClientScript.GetType(), "myscript", "<script  type='text/javascript'>alert('Excel表列名与系统不符合，请检查Excel表列名！');</script>");

                                }                           

                            }

                        }

                        else

                        {

                            Page.ClientScript.RegisterStartupScript(Page.ClientScript.GetType(), "myscript", "<script  type='text/javascript'>alert('您选择的文件不是Excel格式！');</script>");

                        }

                    }

                    catch (Exception ex)

                    {

                        throw ex;

                    }

                    finally

                    {

                        string strFileFolder = Server.MapPath("~/_layouts/15/images/" + folderTemp + "Upfile/");

                        if (Directory.Exists(strFileFolder))     //根目录 

                        {

                            //Directory.CreateDirectory(strFileFolder);//判断上传目录是否存在     自动创建 

                            Directory.Delete(strFileFolder, true);//删除临时文件

                        }

                    }

                });

            }

            else

            {

                Page.ClientScript.RegisterStartupScript(Page.ClientScript.GetType(), "myscript", "<script  type='text/javascript'>alert('上传失败！');</script>");

            }

            

        }



        protected void ButExport_Click(object sender, EventArgs e)

        {

            string strLoginName = HttpContext.Current.User.Identity.Name.ToString();    //获取用户名

            string folderTemp = strLoginName.Substring(strLoginName.LastIndexOf('\\') + 1);

            SPSecurity.RunWithElevatedPrivileges(delegate()

            {

                try

                {

                    string FileName = DateTime.Now.ToString("yyyy.MM.dd HH.mm.ss") + ".xlsx";//以日期定义要导出的文件名

                    string FileFolder = Server.MapPath("~/_layouts/15/images/" + folderTemp + "Upfile/");

                    if (!Directory.Exists(FileFolder))     //根目录 

                    {

                        Directory.CreateDirectory(FileFolder);//判断上传目录是否存在     自动创建 

                    }

                    string strFilePath = FileFolder + FileName;

                    System.Data.DataTable dt = new System.Data.DataTable();



                    using (SPWeb spweb = new SPSite(rootUrl).OpenWeb())

                    {

                        SPList spList = spweb.GetList(rootUrl + "/Lists/ProjectList/AllItems.aspx");

                        dt.Columns.Add("", typeof(string));

                        dt.Columns.Add("标题", typeof(string));

                        dt.Columns.Add("项目标题", typeof(string));

                        dt.Columns.Add("用户名", typeof(string));

                        SPListItemCollection itemColl = spList.Items;

                        foreach (SPListItem item in itemColl)

                        {

                            string strTitle = item["标题"].ToString();

                            string strManager = item["项目标题"].ToString();

                            string strSchedule = item["用户名"].ToString();

                            dt.Rows.Add("", strTitle, strManager, strSchedule);

                        }

                    }

                    //创建一个Excel应用程序对象，如果未创建成功则推出。

                    Application excel1 = new Application();

                    if (excel1 == null)

                    {

                        System.Web.HttpContext.Current.Response.Write("无法创建Excel对象，可能你的电脑未装Excel");

                    }

                    Workbooks workBooks1 = excel1.Workbooks;

                    Workbook workBook1 = workBooks1.Add(XlWBATemplate.xlWBATWorksheet);

                    Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)excel1.Worksheets[1];   //取得sheet1          



                    for (int i = 0; i < dt.Columns.Count; i++)

                    {



                        worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName.ToString();

                    }

                    //把DataTable的数据导入到Excel中（这里用的是两个for循环，当表中行，列比较少时       还 可以，但是比较多时，速度就会很慢，我电脑两万五千条用了尽量分钟）

                    for (int i = 0; i < dt.Rows.Count; i++)

                    {

                        for (int j = 0; j < dt.Columns.Count; j++)

                        {

                            worksheet.Cells[i + 2, j + 1] = dt.Rows[i][j].ToString();

                        }

                    }

                    try

                    {

                        //保存Excel

                        workBook1.Saved = true;

                        workBook1.SaveCopyAs(FileFolder+FileName);

                    }

                    catch (Exception ex)

                    {

                        System.Web.HttpContext.Current.Response.Write("导出文件时出错，文件可能正被打开!\n" + ex.ToString());

                    }

                    workBook1.Close();

                    excel1.Visible = true;

                    if (excel1 != null)

                    {

                        excel1.Workbooks.Close();

                        excel1.Quit();



                        int generation = System.GC.GetGeneration(excel1);

                        System.Runtime.InteropServices.Marshal.ReleaseComObject(excel1);



                        excel1 = null;

                        System.GC.Collect(generation);

                    }



                }

                catch (Exception ex)

                {

                    throw ex;

                } 

            });

        }

        //连接到Excel

         public DataSet ExcelDataSource( string filepath , string sheetname )

        {

            strExcelConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath + ";Extended Properties='Excel 12.0;HDR=YES'";

            OleDbConnection conn = new OleDbConnection(strExcelConn);

            OleDbDataAdapter oada = new OleDbDataAdapter("select * from [" + sheetname + "]", strExcelConn);

            DataSet ds = new DataSet();

            oada.Fill(ds);

            return ds;

        }



        //获得Excel中的所有sheetname。

        public ArrayList ExcelSheetName( string filepath )

        {

            strExcelConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath + ";Extended Properties='Excel 12.0;HDR=YES'";

            ArrayList al = new ArrayList();

            OleDbConnection conn = new OleDbConnection(strExcelConn);

            conn.Open();

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

            conn.Close();

            foreach ( DataRow dr in sheetNames.Rows )

            {

                al.Add(dr[2]);

            }

            return al;

        }

        public string ChangeRowName(SPList splist, string rowName)

        {

            try

            {

                return splist.Fields[rowName].InternalName;

            }

            catch (Exception)

            {

                return "";

            }

        }

    }

}