C#读取Excel和txt文件数据并把数据分别一次性添加到Mysql数据库
C#简单文件读写和简单操作数据库
1.连接Mysql数据库和简单操作数据库类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MySql.Data.MySqlClient;
using System.Data;
namespace mysqlToFile
{
class Connector
{
///
/// 建立MySql数据库连接.
///
/// 返回MySqlConnection对象
public MySqlConnection getmysqlcon()
{
string M_str_sqlcon = "server=127.0.0.1;user=root;"+
"database=tt;port=3306;password=;"; //根据自己的设置
MySqlConnection myCon = new MySqlConnection(M_str_sqlcon);
return myCon;
}
// 执行MySqlCommand命令
///
/// 执行MySqlCommand命令
///
/// SQL语句
public void getmysqlcom(string M_str_sqlstr)
{
MySqlConnection mysqlcon = this.getmysqlcon();
mysqlcon.Open();
MySqlCommand commn = new MySqlCommand("set names utf-8", mysqlcon);
MySqlCommand mysqlcom = new MySqlCommand(M_str_sqlstr, mysqlcon);
mysqlcom.ExecuteNonQuery();
mysqlcom.Dispose();
mysqlcon.Close();
mysqlcon.Dispose();
}
///
/// 创建一个MySqlDataReader对象,以便用于控制台输出表的内容
///
/// SQL语句
/// 返回MySqlDataReader对象
public MySqlDataReader getmysqlread(string M_str_sqlstr)
{
MySqlConnection mysqlcon = this.getmysqlcon();
MySqlCommand mysqlcom = new MySqlCommand(M_str_sqlstr, mysqlcon);
mysqlcon.Open();
MySqlDataReader mysqlread = mysqlcom.ExecuteReader(CommandBehavior.CloseConnection);
return mysqlread;
}
///
/// 创建一个DataTable对象,以便用于控制台及dataGridView控件输出表的内容
///
/// SQL语句
/// 返回MySqlDataReader对象
public DataTable getsqlread(string M_str_sqlstr)
{
MySqlConnection mysqlcon = this.getmysqlcon();
mysqlcon.Open();
MySqlCommand commn = new MySqlCommand("set names utf-8", mysqlcon);
MySqlDataAdapter mda = new MySqlDataAdapter(M_str_sqlstr, mysqlcon);
DataTable dt = new DataTable();
mda.Fill(dt);
return dt;
}
}
}
2.读写文件内容及批量写入数据库中
using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace mysqlToFile
{
public partial class MainOpereteForm : Form
{
public MainOpereteForm()
{
InitializeComponent();
}
Connector connector = new Connector();
///
/// 读取excel文件内容并存放在DataSet中.
///
/// 返回DataSet对象
public DataSet ExcelToDS(string path)
{
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;"
+ "Data Source=" + @path + ";" + "Extended Properties=Excel 8.0;";
OleDbConnection conn = new OleDbConnection(strConn);
conn.Open();
string strExcel = "";
OleDbDataAdapter myCommand = null;
DataSet ds = null;
strExcel = "select * from [sheet1$]";
myCommand = new OleDbDataAdapter(strExcel, strConn);
DataTable table1 = new DataTable();
ds = new DataSet();
myCommand.Fill(table1);
myCommand.Fill(ds);
return ds;
}
private void btnInsertXls_Click(object sender, EventArgs e)
{
InsertXls();
}
///
/// 读取List_Class1_Submit.xls文件的内容并一次性把内容插入到Mysql数据库tt的students表中.
///
private void InsertXls()
{
// 调用文件对话框，选择需要文件
OpenFileDialog openfile = new OpenFileDialog();
openfile.Filter = "工作薄(*.xls)|*.xls|所有文件(*.*)|*.*|工作薄(*.xlsx)|*.xlsx";
if (openfile.FilterIndex == 1 && openfile.ShowDialog() == DialogResult.OK)
{
DataSet dataSet = ExcelToDS(openfile.FileName);
String sqlSearch = "select * from students";
int count = 0;
string[] str = new string[4];
string sql;
foreach (DataTable table in dataSet.Tables)
{
foreach (DataRow row in table.Rows)
{
count = 0;
for (int i = 0; i < 4; i++)
{
str[i] = "*";
}
foreach (DataColumn column in table.Columns)
{
if (row[column] != null)
str[count] = row[column].ToString();
count++;
}
sql = string.Format("insert into students values('{0}','{1}','{2}','{3}')",
str[0], str[1], str[2], str[3]);
if (!str[0].Equals("*"))
{
connector.getmysqlcom(sql);
}
}
}
Reflash(sqlSearch);
}
}
private void btnInsertTxt_Click(object sender, EventArgs e)
{
InsertTxt();
}
///
/// 读取List_Class1.txt文件的内容并一次性把内容插入到Mysql数据库tt的studentss表中.
///
private void InsertTxt()
{
OpenFileDialog openfile = new OpenFileDialog();
openfile.Filter = "文本文件(*.txt)|*.txt|所有文件(*.*)|*.*|word文档(*.doc)|*.doc";
if (openfile.FilterIndex == 1 && openfile.ShowDialog() == DialogResult.OK)
{
String sqlSearch = "select * from studentss";
string[] str = new string[5];
string sql;
using (StreamReader sr = new StreamReader(openfile.FileName, Encoding.Default, false))
{
string line;
while ((line = sr.ReadLine()) != null)
{
line.Trim();
str = line.Split(new char[] { ' ' });
sql = string.Format("insert into studentss values('{0}','{1}','{2}','{3}','{4}')",
str[0], str[1], str[2], str[3], str[4]);
connector.getmysqlcom(sql);
}
}
Reflash(sqlSearch);
}
}
private void selectBtn_Click(object sender, EventArgs e)
{
String sqlSearch = "select studentss.stuName as 未提交作业网址学生 from studentss "+
"where studentss.stuNo not in (select students.stuNo from students)";
Reflash(sqlSearch);
}
///
/// 读取Grade_FirstExercise.xls文件的内容并一次性把内容插入到Mysql数据库tt的grades表中.
///
private void btnInsertGrade_Click(object sender, EventArgs e)
{
OpenFileDialog openfile = new OpenFileDialog();
openfile.Filter = "工作薄(*.xls)|*.xls|所有文件(*.*)|*.*|工作薄(*.xlsx)|*.xlsx";
if (openfile.FilterIndex == 1 && openfile.ShowDialog() == DialogResult.OK)
{
DataSet dataSet = ExcelToDS(openfile.FileName);
String sqlSearch = "select * from grades";
int count = 0;
double grade = 0;
string[] str = new string[3];
string sql;
foreach (DataTable table in dataSet.Tables)
{
foreach (DataRow row in table.Rows)
{
for (int i = 0; i < 3; i++)
{
str[i] = "*";
}
foreach (DataColumn column in table.Columns)
{
if (column.ColumnName == "学号")
{
str[0] = row[column].ToString();
}
if (column.ColumnName == "互评学生姓名")
{
str[1] = row[column].ToString();
}
count = 1;
if (column.ColumnName == "互评学生分数")
{
str[2] = row[column].ToString();
grade = Convert.ToDouble(str[2]);
}
}
sql = string.Format("insert into grades values('{0}','{1}',{2},{3})",
str[0], str[1], count, grade);
if (!str[0].Equals("*") && !str[2].Equals("*"))
{
connector.getmysqlcom(sql);
}
}
}
}
}