Question

asp.net实现excel导入到sql

asp.net如何实现excel导入到sql或者根据需要再将sql中的数据导出到excel表格中。C#语言代码怎么实现？帮忙解决高分相送！

Answer 1

首先这个文件必须上传到服务器，然后读取里面的内容放在ds里面，然后在导入sql
具体做法：
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
using System.Configuration;

namespace ETable
{
/// <summary>
/// ETable 的摘要说明。
/// </summary>
public class ETable : System.Web.UI.Page
{
protected System.Web.UI.HtmlControls.HtmlInputFile File1;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.DataGrid DataGrid1;
public Random rd;

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
}

#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Button1.Click += new System.EventHandler(this.Button1_Click);
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

private void Button1_Click(object sender, System.EventArgs e)
{
if (File1.PostedFile!=null)
{ rd=new Random(1);
string filename=DateTime.Now.Date.ToString("yyyymmdd")+DateTime.Now.ToLongTimeString().Replace(":","")+rd.Next(9999).ToString()+".xls";
File1.PostedFile.SaveAs(@Server.MapPath("file/")+filename);
//Response.Write(File1.PostedFile.FileName.ToString());
//Response.Write("上传成功");
Label1.Text="文件名为"+filename;
string conn = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source ="+Server.MapPath("file")+"/"+filename+";Extended Properties=Excel 8.0" ;
OleDbConnection thisconnection=new OleDbConnection(conn);
thisconnection.Open();
string Sql="select * from [Sheet1$]";
OleDbDataAdapter mycommand=new OleDbDataAdapter(Sql,thisconnection);
DataSet ds=new DataSet();
mycommand.Fill(ds,"[Sheet1$]");
thisconnection.Close();
DataGrid1.DataSource=ds;
DataGrid1.DataBind();

string conn1="User ID=sa;Data Source=127.0.0.1;Password=sa;Initial Catalog=index;Provider=SQLOLEDB.1;";
OleDbConnection thisconnection1=new OleDbConnection(conn1);
thisconnection1.Open();
int count=ds.Tables["[Sheet1$]"].Rows.Count;

for (int i=0;i<count;i++)
{
string id,id_1,id_2,id_3;
id=ds.Tables["[Sheet1$]"].Rows[i]["id"].ToString();
id_1=ds.Tables["[Sheet1$]"].Rows[i]["id_1"].ToString();
id_2=ds.Tables["[Sheet1$]"].Rows[i]["id_2"].ToString();
id_3=ds.Tables["[Sheet1$]"].Rows[i]["id_3"].ToString();
string excelsql="insert into excel(id,id_1,id_2,id_3) values ('"+id+"','"+id_1+"','"+id_2+"','"+id_3+"') ";
OleDbCommand mycommand1=new OleDbCommand(excelsql,thisconnection1);
mycommand1.ExecuteNonQuery();
}
Response.Write("更新成功");
thisconnection1.Close();

//FileStream fileStream = new FileStream(@Server.MapPath("file/")+filename);
System.IO.File.Delete(@Server.MapPath("file/")+filename);

}
}
}
}

C#

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
using System.Configuration;

namespace ETable
{
/// <summary>
/// ETable 的摘要说明。
/// </summary>
public class ETable : System.Web.UI.Page
{
protected System.Web.UI.HtmlControls.HtmlInputFile File1;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.DataGrid DataGrid1;
public Random rd;

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
}

#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Button1.Click += new System.EventHandler(this.Button1_Click);
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

private void Button1_Click(object sender, System.EventArgs e)
{
if (File1.PostedFile!=null)
{ rd=new Random(1);
string filename=DateTime.Now.Date.ToString("yyyymmdd")+DateTime.Now.ToLongTimeString().Replace(":","")+rd.Next(9999).ToString()+".xls";
File1.PostedFile.SaveAs(@Server.MapPath("file/")+filename);
//Response.Write(File1.PostedFile.FileName.ToString());
//Response.Write("上传成功");
Label1.Text="文件名为"+filename;
string conn = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source ="+Server.MapPath("file")+"/"+filename+";Extended Properties=Excel 8.0" ;
OleDbConnection thisconnection=new OleDbConnection(conn);
thisconnection.Open();
string Sql="select * from [Sheet1$]";
OleDbDataAdapter mycommand=new OleDbDataAdapter(Sql,thisconnection);
DataSet ds=new DataSet();
mycommand.Fill(ds,"[Sheet1$]");
thisconnection.Close();
DataGrid1.DataSource=ds;
DataGrid1.DataBind();

string conn1="User ID=sa;Data Source=127.0.0.1;Password=sa;Initial Catalog=index;Provider=SQLOLEDB.1;";
OleDbConnection thisconnection1=new OleDbConnection(conn1);
thisconnection1.Open();
int count=ds.Tables["[Sheet1$]"].Rows.Count;

for (int i=0;i<count;i++)
{
string id,id_1,id_2,id_3;
id=ds.Tables["[Sheet1$]"].Rows[i]["id"].ToString();
id_1=ds.Tables["[Sheet1$]"].Rows[i]["id_1"].ToString();
id_2=ds.Tables["[Sheet1$]"].Rows[i]["id_2"].ToString();
id_3=ds.Tables["[Sheet1$]"].Rows[i]["id_3"].ToString();
string excelsql="insert into excel(id,id_1,id_2,id_3) values ('"+id+"','"+id_1+"','"+id_2+"','"+id_3+"') ";
OleDbCommand mycommand1=new OleDbCommand(excelsql,thisconnection1);
mycommand1.ExecuteNonQuery();
}
Response.Write("更新成功");
thisconnection1.Close();

}
}
}
}