将 Excel 数据导入 MySql
能承受上万数据量，速度快，并且使用了事务，不会出现某条数据错误而导致部分数据插入(要是全部成功要是一条都不成功，测试过程中没出现失败)，需要的朋友可以参考下
1.NPOI
2.MySql.Data
这里做个记录，待日后使用
效果图
连接字符串 app.config：
<connectionStrings>
<add name="DBConnectString" connectionString="Server=ip;Database=testjh;Uid=user;Pwd=123456;charset=utf8" providerName="MySql.Data.MySqlClient"/>
</connectionStrings>
执行多条sql语句：
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>mysql数据库
/// <param name="SQLStringList">多条SQL语句</param>
public static void ExecuteSqlTran(List<string> SQLStringList)
{
using (MySqlConnection conn = new MySqlConnection(MySqlHelper.connectionString))
{
conn.Open();
MySqlCommand cmd = new MySqlCommand();
cmd.Connection = conn;
MySqlTransaction tx = conn.BeginTransaction();
cmd.Transaction = tx;
try
{
for (int n = 0; n < SQLStringList.Count; n++)
{
string strsql = SQLStringList[n].ToString();
if (strsql.Trim().Length > 1)
{
cmd.CommandText = strsql;
cmd.ExecuteNonQuery();
}
//后来加上的
if (n > 0 && (n % 500 == 0 || n == SQLStringList.Count - 1))
{
tx.Commit();
tx = conn.BeginTransaction();
}
}
//tx.Commit();//原来一次性提交
}
catch (System.Data.SqlClient.SqlException E)
{
tx.Rollback();
throw new Exception(E.Message);
}
}
}
单击按钮：
/// <summary>
/// 单击按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
button1.Text = "正在插入中...";
OpenFileDialog file1 = new OpenFileDialog();
file1.Filter = "Excel文件|*.xlsx";
if (file1.ShowDialog() == DialogResult.OK)
{
//开始读excel
Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application(); ;
Microsoft.Office.Interop.Excel.Workbook workbook = xlApp.Workbooks.Open(file1.FileName, 0, false, 5, "", "",false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "", true, false, 0, true, 1, 0);
int n = workbook.Worksheets.Count;
string[] sheetSet = new string[n];
ArrayList al = new ArrayList();
for (int i = 0; i < n; i++)
{
sheetSet[i] = ((Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[i + 1]).Name;
}
xlApp.Workbooks.Close();
ExcelHelper ex = new ExcelHelper(file1.FileName);
if (sheetSet.Length > 0)//判断存在 一个 Sheet1
{
int countLength = sheetSet.Length;//表示 Sheet的个数
dt1 = ex.ExcelToDataTable(sheetSet[0], true);//"Sheet1" ，先假如只有一个Sheet1
insertMySql();
}
}
}
写入数据：
public void insertMySql()
{
try
{
int ColumnsCount = dt1.Columns.Count;//得到读出表中 列的数量
string str = string.Empty;
string[] strArr = new string[ColumnsCount];
string valuesStr = string.Empty;
List<string> listStr=new List<string>();
for (int i = 0; i < dt1.Rows.Count; i++)
{
DataRow dr = dt1.Rows[i];
for (int j = 0; j < ColumnsCount; j++)
{
strArr[j] = dr.ItemArray[j].ToString();
}
string sqlInsert =string.Format("insert into t_test(torder,tname,stu_num,tage) values('{0}','{1}','{2}','{3}')",strArr[0],strArr[1],strArr[2],strArr[3]);
listStr.Add(sqlInsert);
#region 没使用事务
//string sql = "insert into t_test(torder,tname,stu_num,tage) values(@torder,@tname,@stu_num,@tage)";
//MySqlParameter[] parms = {
// new MySqlParameter("@torder",strArr[0]),
// new MySqlParameter("@tname",strArr[1]),
// new MySqlParameter("@stu_num",strArr[2]),
// new MySqlParameter("@tage",strArr[3])
// };
// 在这里可以直接调用 ExecuteNonQuery 向数据库插数据
// MySqlHelper.ExecuteNonQuery(MySqlHelper.connectionString, CommandType.Text, sql, parms);
#endregion
}
ExecuteSqlTran(listStr);//使用事务插入
// button1.Text = "插入成功！";
Thread.Sleep(10000);
button1.Text = "插入成功,请选择Excel文件！";
}
catch (Exception ex)
{
throw ex;
}
}
MySqlHelper: 应该把 ExecuteSqlTran 这个类方法放入该类，这里我没有这么做，项目小(零时需求)就没这么做了！
public static string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["DBConnectString"].ToString();
ExcelHelper：
public class ExcelHelper : IDisposable
{
private string fileName = null; //文件名
private IWorkbook workbook = null;
private FileStream fs = null;
private bool disposed;
public ExcelHelper(string fileName)
{
this.fileName = fileName;
disposed = false;
}
/// <summary>
/// 将DataTable数据导入到excel中
/// </summary>
/// <param name="data">要导入的数据</param>
/// <param name="isColumnWritten">DataTable的列名是否要导入</param>
/// <param name="sheetName">要导入的excel的sheet的名称</param>
/// <returns>导入数据行数(包含列名那一行)</returns>
public int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten)
{
int i = 0;
int j = 0;
int count = 0;
ISheet sheet = null;
fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
workbook = new XSSFWorkbook();
else if (fileName.IndexOf(".xls") > 0) // 2003版本
workbook = new HSSFWorkbook();
try
{
if (workbook != null)
{
sheet = workbook.CreateSheet(sheetName);
}
else
{
return -1;
}
if (isColumnWritten == true) //写入DataTable的列名
{
IRow row = sheet.CreateRow(0);
for (j = 0; j < data.Columns.Count; ++j)
{
row.CreateCell(j).SetCellValue(data.Columns[j].ColumnName);
}
count = 1;
}
else
{
count = 0;
}
for (i = 0; i < data.Rows.Count; ++i)
{
IRow row = sheet.CreateRow(count);
for (j = 0; j < data.Columns.Count; ++j)
{
row.CreateCell(j).SetCellValue(data.Rows[i][j].ToString());
}
++count;
}
workbook.Write(fs); //写入到excel
return count;
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
return -1;
}
}
/// <summary>
/// 将excel中的数据导入到DataTable中
/// </summary>
/// <param name="sheetName">excel工作薄sheet的名称</param>
/// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param>
/// <returns>返回的DataTable</returns>
public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn)
{
ISheet sheet = null;
DataTable data = new DataTable();
int startRow = 0;
try
{
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
workbook = new XSSFWorkbook(fs);
else if (fileName.IndexOf(".xls") > 0) // 2003版本
workbook = new HSSFWorkbook(fs);
if (sheetName != null)
{
sheet = workbook.GetSheet(sheetName);
if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
{
sheet = workbook.GetSheetAt(0);
}
}
else
{
sheet = workbook.GetSheetAt(0);
}
if (sheet != null)
{
IRow firstRow = sheet.GetRow(0);
int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数
if (isFirstRowColumn)
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
ICell cell = firstRow.GetCell(i);
if (cell != null)
{
string cellValue = cell.StringCellValue;
if (cellValue != null)
{
DataColumn column = new DataColumn(cellValue);
data.Columns.Add(column);
}
}
}
startRow = sheet.FirstRowNum + 1;
}
else
{
startRow = sheet.FirstRowNum;
}
//最后一列的标号
int rowCount = sheet.LastRowNum;
for (int i = startRow; i <= rowCount; ++i)
{
IRow row = sheet.GetRow(i);
if (row == null) continue; //没有数据的行默认是null
DataRow dataRow = data.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
dataRow[j] = row.GetCell(j).ToString();
}
data.Rows.Add(dataRow);
}
}
return data;
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
return null;
}
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (!this.disposed)
{
if (disposing)
{
if (fs != null)
fs.Close();
}
fs = null;
disposed = true;
}
}
}
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