asp.net_Excel数据导入数据库

      之前做过一个这样的项目，需要把Excel的数据导入到数据库，并实时在gridview上面分页显示出来(数据大于gridview一页显示的数量的时候分页,这里是显示4条)，现在先收集起来。

DB db = new DB();
static int num,fy; //excel数据条数,分页
//批量添加
protected void txtMoreadd_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile == false)//HasFile用来检查FileUpload是否有指定文件
{
ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('请您选择Excel文件')</script> ");
return;//当无文件时,返回
}
string IsXls = System.IO.Path.GetExtension(FileUpload1.FileName).ToString().ToLower();//System.IO.Path.GetExtension获得文件的扩展名
if (IsXls != ".xls")
{
ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('只可以选择Excel文件')</script>");
return;//当选择的不是Excel文件时,返回
}
string filename = FileUpload1.FileName;              //获取Execle文件名  DateTime日期函数
string savePath = Server.MapPath(("upfiles\\") + filename);//Server.MapPath 获得虚拟服务器相对路径
FileUpload1.SaveAs(savePath);                        //SaveAs 将上传的文件内容保存在服务器上
DataSet ds = ExcelSqlConnection(savePath, filename);           //调用自定义方法
DataRow[] dr = ds.Tables[0].Select();            //定义一个DataRow数组
int rowsnum = ds.Tables[0].Rows.Count;
num = dr.Length;
if (rowsnum == 0)
{
ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('Excel表为空表,无数据!')</script>");   //当Excel表为空时,对用户进行提示
}
else
{
for (int i = 0; i < dr.Length; i++)
{
//前面除了你需要在建立一个“upfiles”的文件夹外，其他的都不用管了，你只需要通过下面的方式获取Excel的值，然后再将这些值用你的方式去插入到数据库里面
string user_name = dr[i]["user_name"].ToString();
string dept_id = dr[i]["dept_id"].ToString();
string spc_id = dr[i]["spc_id"].ToString();
string class_id = dr[i]["class_id"].ToString();
string room = dr[i]["room"].ToString();
string pic = dr[i]["pic"].ToString();

string strsql = "insert into users(user_name,dept_id,spc_id,class_id,room,pic)values('" + user_name + "','" + dept_id + "','" + spc_id + "','" + class_id + "','" + room + "','" + pic + "')";  //添加到数据库
db.sqlEx(strsql);
}

ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('Excle表成功导入" + num + "条数据!')</script>");
upfilecheck();
}
}

#region 连接Excel  读取Excel数据   并返回DataSet数据集合
/// <summary>
/// 连接Excel  读取Excel数据   并返回DataSet数据集合
/// </summary>
/// <param name="filepath">Excel服务器路径</param>
/// <param name="tableName">Excel表名称</param>
/// <returns></returns>
public static System.Data.DataSet ExcelSqlConnection(string filepath, string tableName)
{
string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;HDR=YES;IMEX=1'";
OleDbConnection ExcelConn = new OleDbConnection(strCon);
try
{
string strCom = string.Format("SELECT * FROM [Sheet1$]");
ExcelConn.Open();
OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, ExcelConn);
DataSet ds = new DataSet();
myCommand.Fill(ds, "[" + tableName + "$]");
ExcelConn.Close();
return ds;
}
catch
{
ExcelConn.Close();
return null;
}
}
#endregion

//gridview显示批量上传的数据
public void upfilecheck()
{
string strsql2 = @"SELECT top " + num + @" users.user_name, department.dept_name, special.spc_name, class.class_name,
users.room FROM users INNER JOIN
department ON users.dept_id = department.dept_id INNER JOIN
special ON users.spc_id = special.spc_id INNER JOIN
class ON users.class_id = class.class_id order by user_id desc";
DataTable dt = db.reDt(strsql2);
GridView1.DataSource = dt;
GridView1.DataBind();
Label3.Text = "共有：" + num + "条记录。";
fy = 2;
}

表的格式如下:  9条数据



一按批量添加按钮,就有在gridview上面显示,而且自动分好页:









付DB.cs文件代码:
using System;
.......

/// <summary>
///DB 的摘要说明
/// </summary>
public class DB
{
public DB()
{
//
//TODO: 在此处添加构造函数逻辑
//
}

public SqlConnection GetCon()
{
string strcon = ConfigurationManager.AppSettings["sql"];
return new SqlConnection(strcon);
}

///<summary>
///执行SQL语句
///</summary>
///<param name="cmdstr">SQL语句</param>
///<returns>返回值为int型：成功返1，失败返0</returns>
public int sqlEx(string cmdstr)
{
SqlConnection con = GetCon(); //连接数据库
con.Open();//打开连接
SqlCommand cmd = new SqlCommand(cmdstr, con);
try
{
cmd.ExecuteNonQuery();//执行SQL语句并返回受影响的行数
return 1;//成功返回1
}
catch
{
return 0;//失败返回0
}
finally
{
con.Dispose();//释放连接对象资源，比close彻底
}
}

///<summary>
///执行SQL查询语句
///</summary>
///<param name="cmdstr">查询语句</param>
///<returns>返回DataTable数据表</returns>
public DataTable reDt(string cmdstr)
{
SqlConnection con = GetCon();
SqlDataAdapter da = new SqlDataAdapter(cmdstr, con);
DataSet ds = new DataSet();
da.Fill(ds);
return (ds.Tables[0]);

}

///<summary>
///执行SQL查询语句
///</summary>
///<param name="cmdstr">查询语句</param>
///<returns>返回SqlDataReader对象dr</returns>
public SqlDataReader reDr(string str)
{
SqlConnection con = GetCon();//连接数据库
con.Open();//并打开了连接
SqlCommand cmd = new SqlCommand(str, con);
SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return dr;//返回SqlDataReader对象dr
}
}