.net数据库实现Excel的导入与导出

1.default.aspx文件

<form id="form1" runat="server">
    <table style=" 858px">
        <tr>
            <td style=" 334px">
                <asp:Button ID="readFromDB" runat="server"

OnClick="readFromDB_Click" Text="从数据库读取数据" />
                <asp:GridView ID="GridView1" runat="server"

AutoGenerateColumns="True" BackColor="White" BorderColor="#E7E7FF"

BorderStyle="None" BorderWidth="1px" CellPadding="3" Font-Names="Arial"

Font-Size="12px" GridLines="Horizontal" RowStyle-HorizontalAlign="Center"

Width="98%">
                <FooterStyle BackColor="#B5C7DE" ForeColor="#4A3C8C" />

<RowStyle BackColor="#E7E7FF" ForeColor="#4A3C8C"

HorizontalAlign="Center" />
                <SelectedRowStyle BackColor="#738A9C" Font-Bold="True"

ForeColor="#F7F7F7" />
                <PagerStyle BackColor="#E7E7FF" ForeColor="#4A3C8C"

HorizontalAlign="Right" />
                <HeaderStyle BackColor="#4A3C8C" Font-Bold="True"

ForeColor="#F7F7F7" HorizontalAlign="Center" />
                <AlternatingRowStyle BackColor="#F7F7F7" /> </asp:GridView>
                <asp:FileUpload ID="FileUpload1" runat="server" />
                <asp:Button ID="Import" runat="server" OnClick="Import_Click" Text="

导入" />
                <asp:Button ID="output" runat="server" OnClick="btnOut_Click" Text="

导出" />
            </td>
        </tr>
    </table>
    </form>

2.default.aspx.cs文件

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Data.OleDb;
using System.Text;
using JJoobb.Web;
using System.IO;
public partial class _Default : System.Web.UI.Page
{
    string strConn = SiteSetting.ConnectionString;
    string sqlSelectALL = SiteSetting.sqlSelALL;
    string exToDB = SiteSetting.ExToDB;
    protected void Page_Load(object sender, EventArgs e)
    {
     
    }
    protected void readFromDB_Click(object sender, EventArgs e)
    {
        Bind();
    }
    public void btnOut_Click(object sender, EventArgs e)
    {
        try
        {
            CreateExcel(getds());
            Response.Write("<script>alert('数据导出成功!')</script>");
        }
        catch
        {
            Response.Write("<script>alert('数据导出失败!')</script>");
        }
    }
    public void CreateExcel(DataSet ds)
    {
        string outPutPath=SiteSetting.OutPutPath +DateTime.Now.ToString

("yyyyMMddHHmmss-")+SiteSetting.FileName;
        FileStream file = new FileStream(outPutPath, FileMode.Create);
        StreamWriter sw = new StreamWriter(file,Encoding.Default);//设置编码为当

面页面编码
        string colHeaders = "", ls_item = "";
        //定义表对象与行对象，同时用DataSet对其值进行初始化
        DataTable dt = ds.Tables[0];
        DataRow[] myRow = dt.Select();//可以类似dt.Select("id>10")之形式达到数

据筛选目的
        int i = 0;
        int cl = dt.Columns.Count;
        //取得数据表各列标题，各标题之间以\t分割，最后一个列标题后加回车

符
        for (i = 0; i < cl; i++)
        {
            if (i == (cl - 1))//最后一列，加\n
            {
                colHeaders += dt.Columns[i].Caption.ToString() + "\n";
            }
            else
            {
                colHeaders += dt.Columns[i].Caption.ToString() + "\t";
            }
        }
        sw.Write(colHeaders);
        foreach (DataRow row in myRow)
        {
            //当前行数据写入输出流，并且置空ls_item以便下行数据    
            for (i = 0; i < cl; i++)
            {
                if (i == (cl - 1))
                {
                    ls_item += row[i].ToString() + "\n";
                }
                else
                {
                    ls_item += row[i].ToString() + "\t";
                }
            }
            sw.Write(ls_item);
            ls_item = "";
        }
        sw.Flush();
        sw.Close();
        file.Close();
    }

    //从数据库取出要导出的Detset数据集
    private DataSet getds()
    {
        SqlConnection conns = new SqlConnection(strConn);
        SqlDataAdapter da = new SqlDataAdapter(sqlSelectALL, conns);
        DataSet ds = new DataSet();
        da.Fill(ds);
        conns.Close();
        conns.Dispose();
        return ds;
    }
    //绑定数据
    public void Bind()
    {
        DataSet ds = new DataSet();
        using (SqlConnection conn = new SqlConnection())
        {
            SqlDataAdapter sda = new SqlDataAdapter(sqlSelectALL, strConn);
            sda.Fill(ds, "ex_test");
        }
        GridView1.DataSource = ds.Tables["ex_test"];
        GridView1.DataBind();
    }
    //导入数据
    protected void Import_Click(object sender, EventArgs e)
    {
        string getErrMsg = "";
        DataSet excelDs = new DataSet();
        if (FileUpload1.PostedFile.FileName == "")
        {
            Response.Write("<script language=javascript>alert('请选择要上传的文件

！');</script>");
            return;
        }
        //从Excel读取数据
        string filePath = FileUpload1.PostedFile.FileName;
        string connString = exToDB + filePath;
        OleDbConnection excelConn = new OleDbConnection(connString);
        OleDbDataAdapter ExcelDA = new OleDbDataAdapter("SELECT * FROM

[Sheet1$]", excelConn);
        try
        {
            ExcelDA.Fill(excelDs, "ex_test");
        }
        catch (Exception err)
        {
            Response.Write(err.Message);
        }
        finally
        {
            excelConn.Close();
            excelConn = null;
        }
        //将数据写入数据库
        if (excelDs.Tables[0].Rows.Count != 0)
        {
            SqlConnection sqlConn = new SqlConnection(strConn);
            sqlConn.Open();
            SqlCommand myCommand = sqlConn.CreateCommand();
            SqlTransaction myTrans = sqlConn.BeginTransaction();
            myCommand.Transaction = myTrans;
            try
            {
                for (int i = 0; i < excelDs.Tables[0].Rows.Count; i++)
                {
                    string sql = "insert into ex_test(id, name, sex,email,address) values('"

+ excelDs.Tables[0].Rows[i]["编号"].ToString() + "','" + excelDs.Tables[0].Rows[i]["

姓名"].ToString() + "','" + excelDs.Tables[0].Rows[i]["性别"].ToString() + "','" +

excelDs.Tables[0].Rows[i]["邮箱"].ToString() + "','" + excelDs.Tables[0].Rows[i]["地

址"].ToString() + "')";
                    myCommand.CommandText = sql; myCommand.ExecuteNonQuery();
                }
                myTrans.Commit();
            }
            catch (Exception ex)
            {
                getErrMsg = ex.Message.ToString();
                Response.Write(ex.Message.ToString());
                myTrans.Rollback();
            }
            finally
            {
                sqlConn.Close();
                sqlConn = null;
            }

        }
        //返回提示信息
        if (getErrMsg == "" || getErrMsg == null)
        {
            Response.Write("<script language='Javascript'>alert('导入成功！')

</script>");
            Bind();
        }
        else
        {
            Response.Write("<script language='Javascript'>alert('导入失败！')

</script>");
            return;
        }
    }

}

3.SiteSetting.cs

using System;
using System.Configuration;
using System.Collections.Generic;
using System.Text;

/// <summary>
/// SiteSetting 的摘要说明
/// </summary>
namespace JJoobb.Web
{
    public class SiteSetting
    {
        //数据库连接字符串
        public static string ConnectionString =

ConfigurationManager.ConnectionStrings["connectionString"].ConnectionString;

        //导出文件名称
        public static string FileName = "OutPut.xls";

        //导出文件地址
        public static string OutPutPath = "C:\\Documents and

Settings\\Administrator\\桌面\\excleFile\\";

        //sql语句
        public static string sqlSelALL = "select

id,title,contents,userName,phone,email,CONVERT(varchar(100), AddDate, 20)

AddDate,ReContents from Feedback";

        //从excel读数据
        public static string ExToDB = "Provider=Microsoft.Jet.OLEDB.4.0;Extended

Properties=\"Excel 8.0;HDR=Yes;IMEX=1\";Data Source=";
    }
}

4.web.config

<connectionStrings>
<add name="connectionString"

connectionString="server=local;uid=sa;pwd=pwd;database=TestExcel"

providerName="System.Data.SqlClient"/>
</connectionStrings>