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如题一样,我才刚学的C#现在想写个导入excel,但是老是出现这个问题,请大家帮我看看啊
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 Microsoft.Office.Interop.Excel;
using System.Reflection;
using System.IO;
using System.Data.OleDb;
namespace 导入excel
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
DataSet ds = new DataSet(); //全局变量
private void button1_Click(object sender, EventArgs e)
{
//测试,将excel中的sheet1导入到sqlserver中
string connString = "server=localhost;uid=sa;pwd=sqlgis;database=master";
System.Windows.Forms.OpenFileDialog fd = new OpenFileDialog();
if (fd.ShowDialog() == DialogResult.OK)
{
TransferData(fd.FileName, "sheet1", connString);
}
}
public void TransferData(string excelFile, string sheetName, string connectionString)
{
DataSet ds = new DataSet();
try
{
//获取全部数据
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + excelFile + ";" + "Extended Properties=Excel 8.0;";
OleDbConnection conn = new OleDbConnection(strConn);
conn.Open();
string strExcel = "";
OleDbDataAdapter myCommand = null;
strExcel = string.Format("select * from [{0}$]", sheetName);
myCommand = new OleDbDataAdapter(strExcel, strConn);
{myCommand.Fill(ds, sheetName);
//如果目标表不存在则创建 exce文件的第一行为列标题,从第二行开始全部都是数据记录
string strSql = string.Format("if object_id('{0}') is null create table {0}(", sheetName); //以sheetName为表名
foreach (System.Data.DataColumn c in ds.Tables[0].Columns)
{
strSql+= string.Format("[{0}] varchar(255),", c.ColumnName);
}
strSql = strSql.Trim(',') + ")";
using (System.Data.SqlClient.SqlConnection sqlconn = new System.Data.SqlClient.SqlConnection(connectionString))
sqlconn.Open();
System.Data.SqlClient.SqlCommand command = sqlconn.CreateCommand();
command.CommandText = strSql;
command.ExecuteNonQuery();
sqlconn.Close();
}
//用bcp导入数据
//excel文件中列的顺序必须和数据表的列顺序一致,因为数据导入时,是从excel文件的第二行数据开始,不管数据表的结构是什么样的,反正就是第一列的数据会插入到数据表的第一列字段中,第二列的数据插入到数据表的第二列字段中,以此类推,它本身不会去判断要插入的数据是对应数据表中哪一个字段的
using (System.Data.SqlClient.SqlBulkCopy bcp = new System.Data.SqlClient.SqlBulkCopy(connectionString))
{
bcp.SqlRowsCopied += new System.Data.SqlClient.SqlRowsCopiedEventHandler(bcp_SqlRowsCopied);
bcp.BatchSize = 100;//每次传输的行数
bcp.NotifyAfter = 100;//进度提示的行数
bcp.DestinationTableName = sheetName;//目标表
bcp.WriteToServer(ds.Tables[0]);
}
}
catch (Exception ex)
{
System.Windows.Forms.MessageBox.Show(ex.Message);
}
}
//进度显示
void bcp_SqlRowsCopied(object sender, System.Data.SqlClient.SqlRowsCopiedEventArgs e)
{
this.Text = e.RowsCopied.ToString();
this.Update();
}
}
}
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老是会提示上下文中不存在名称sqlconn,望各位大侠看看.
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