using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Data.OleDb;

using System.Data.SqlClient;

using System.IO;

namespace WindowsFormsApplication1

{

    public partial class Form3 : Form

    {

        public Form3()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            string connString = "server=localhost;database=Test;uid=sa;pwd=123456";

            OpenFileDialog ofd = new OpenFileDialog();

            if (ofd.ShowDialog() == DialogResult.OK)

            {

                TransferData(ofd.FileName, connString);

            }

        }

        public void TransferData(string excelFile, string connectionString)

        {

            try

            {

                string fileType = Path.GetExtension(excelFile);

                //获取全部数据

                string strConn="";

                if (fileType == ".xls")

                {

                    strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + excelFile + ";" + "Extended Properties=Excel 8.0;";

                }

                else

                {

                    strConn = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + excelFile + ";" + ";Extended Properties=Excel 12.0";

                }

                    OleDbConnection conn = new OleDbConnection(strConn);

                conn.Open();

                DataSet ds = new DataSet();

                DataTable dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });

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

                {

                    string sheetName = dt.Rows[i]["Table_Name"].ToString();

                    if (sheetName.Contains("$") && !sheetName.Replace("'", "").EndsWith("$"))

                    {

                        continue;

                    }

                    string strExcel = string.Format("select * from [{0}]", sheetName);

                    OleDbDataAdapter myCommand = new OleDbDataAdapter(strExcel, conn);

                    DataSet dsItem = new DataSet();

                    myCommand.Fill(dsItem, sheetName);

                    dsItem.Tables[].TableName = sheetName.TrimEnd('$').Trim();//读取出来的表明会自动添加'$'符号，需要去掉。

                    ds.Tables.Add(dsItem.Tables[].Copy());

                }

                for (int i = ; i < ds.Tables.Count; i++)

                {

                    string sheetName = ds.Tables[i].TableName;

                    string strSql = string.Format("if object_id('{0}') is null create table {0}(", sheetName);

                    foreach (System.Data.DataColumn c in ds.Tables[].Columns)

                    {

                        strSql += string.Format("[{0}] varchar(255),", c.ColumnName);

                    }

                    strSql = strSql.Trim(',') + ")";

                    using (SqlConnection sqlConn = new SqlConnection(connectionString))

                    {

                        sqlConn.Open();

                        using (SqlCommand cmd = sqlConn.CreateCommand())

                        {

                            cmd.CommandText = strSql;

                            cmd.ExecuteNonQuery();

                        }

                    }

                    using (SqlBulkCopy bcp = new SqlBulkCopy(connectionString))

                    {

                        bcp.BatchSize = ;

                        bcp.DestinationTableName = sheetName;

                        //建立excel和sqlserver表之间的映射关系

                        bcp.ColumnMappings.Add(, );

                        bcp.ColumnMappings.Add(, );

                        bcp.ColumnMappings.Add(, );

                        bcp.WriteToServer(ds.Tables[i]);

                    }

                }

            }

            catch(Exception ex)

            {

                MessageBox.Show(ex.ToString());

            }

        }

    }

}