C# winform Excel导入保存数据两种方法
方法一：；微软自带excel 操作类
项目运行：设置 Any CPU
引用：System.Data.OleDb
点击事件导入按钮：
private void buttonX25_Click(object sender, EventArgs e)
{
//打开一个文件选择框
OpenFileDialog ofd = new OpenFileDialog();
ofd.Title = "Excel文件";
ofd.FileName = "";
ofd.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);//为了获取特定的系统文件夹，可以使用System.Environment类的静态方法GetFolderPath()。该方法接受一个Environment.SpecialFolder枚举，其中可以定义要返回路径的哪个系统目录
ofd.Filter = "Excel文件| *.xlsx;*.xls";
ofd.ValidateNames = true; //文件有效性验证ValidateNames，验证用户输入是否是一个有效的Windows文件名
ofd.CheckFileExists = true; //验证路径有效性
ofd.CheckPathExists = true; //验证文件有效性
string strName = string.Empty;
if (ofd.ShowDialog() == DialogResult.OK)
{
strName = ofd.FileName;
}
if (strName == "")
{
MessageBox.Show("没有选择Excel文件！无法进行数据导入");
return;
}
EXCLChannel hh = new EXCLChannel();
//调用导入数据方法
EcxelToDataGridView(strName, hh.dataGridViewX20);
}
调用方法：绑定DataGridView进行预览
public void EcxelToDataGridView(string filePath, DataGridViewX dgv)
{
string strConn = "";
if (filePath.EndsWith(".xls"))
{
strConn = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data
Source={0};Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'", filePath);
}
else if (filePath.EndsWith(".xlsx"))
{
strConn = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data
Source={0};Extended Properties='Excel 12.0;HDR=Yes;IMEX=1;'", filePath);
}
//根据路径打开一个Excel文件并将数据填充到DataSet中
//导入时包含Excel中的第一行数据，并且将数字和字符混合的单元格视为文本进行导入
System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection(strConn);
conn.Open();
string strExcel = "";
System.Data.OleDb.OleDbDataAdapter myCommand = null;
DataSet dd = null;
strExcel = "select * from [sheet1$]";
myCommand = new System.Data.OleDb.OleDbDataAdapter(strExcel, strConn);
dd = new DataSet();
myCommand.Fill(dd, "table1");
//根据DataGridView的列构造一个新的DataTable
DataTable tb = new DataTable();
foreach (DataGridViewColumn dgvc in dgv.Columns)
{
if (dgvc.Visible && dgvc.CellType != typeof(DataGridViewCheckBoxCell))
{
DataColumn dc = new DataColumn();
dc.ColumnName = dgvc.DataPropertyName;
//dc.DataType = dgvc.ValueType;//若需要限制导入时的数据类型则取消注释，前提是DataGridView必须先绑定一个数据源那怕是空的DataTable
tb.Columns.Add(dc);
}
}
//根据Excel的行逐一对上面构造的DataTable的列进行赋值
foreach (DataRow excelRow in dd.Tables[0].Rows)
{
int i = 0;
DataRow dr = tb.NewRow();
foreach (DataColumn dc in tb.Columns)
{
dr[dc] = excelRow[i];
i++;
}
tb.Rows.Add(dr);
}
//在DataGridView中显示导入的数据
dgv.DataSource = tb;
EXCLChannel fg = new EXCLChannel(tb);
fg.ShowDialog();
}
//另一个窗体 EXCLChannel 实现预览
public EXCLChannel(DataTable td)
{
InitializeComponent();
this.dataGridViewX20.DataSource = td;
}
方法二：NPOI导入
引用：NPOI
添加类：ExcelRender 下载
链接：https://pan.baidu.com/s/1objybCCUKWw6ogXxkjThqg
提取码：lw0s
public void EcxelToDataGridView(string filePath, DataGridViewX dgv)
{
FileStream fs = null;
try
{
//String 文件路径，FileMode 文件打开模式，FileAccess 文件访问方式
fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
//
byte[] fileBytes = new byte[fs.Length];
//从流中读取数据，返回字节数组
fs.Read(fileBytes, 0, Convert.ToInt32(fs.Length));
//实例化
DataTable dtexcel = new DataTable();
if (filePath.EndsWith(".xls"))
{
dtexcel = ExcelRender.RenderFromExcel(new MemoryStream(fileBytes), 0);
}
else
{
dtexcel = ExcelRender.RenderFromExcelxlsx(new MemoryStream(fileBytes), 0);
}
if (dtexcel.Rows.Count > 0)
{
EXCLChannel fg = new EXCLChannel(dtexcel);
fg.ShowDialog();
}
else
{
MessageBox.Show("请检查EXCL表格数据和表头是否正确");
}
if (dtexcel.Rows.Count > 0)
{
fileBytes = null;
}
}
catch (Exception)
{
}
finally
{
if (fs != null)
{
fs.Close();
}
}
}
//另一个窗体 EXCLChannel
public EXCLChannel(DataTable td)
{
InitializeComponent();
this.dataGridViewX20.DataSource = td;
}
//保存数据库
页面点击保存按钮：
private void buttonX25_Click(object sender, EventArgs e)
{
if (dataGridViewX20.Rows.Count > 0)
{
int num = 0;
Dictionary[] dis = new Dictionary[dataGridViewX20.Rows.Count];
try
{
foreach (DataGridViewRow DVG in dataGridViewX20.Rows)
{
Dictionary di = new Dictionary();
di.Add(1, DVG.Cells["Fixed_Assets_Code"].Value.ToString());
di.Add(2, DVG.Cells["Capital_assets_Code"].Value.ToString());
di.Add(3, DVG.Cells["Class_Code"].Value.ToString());
di.Add(4, DVG.Cells["Place_Code"].Value.ToString());
di.Add(5, DVG.Cells["Department_Code"].Value.ToString());
di.Add(6, DVG.Cells["Procurement_Date"].Value.ToString());
di.Add(7, DVG.Cells["Manufacture"].Value.ToString());
dis[num] = di;
num++;
}
int iss = ibll.InsertEREXCL(dis);
MessageBox.Show("导入成功：" + iss + "条数据!!");
}
catch (Exception)
{
MessageBox.Show("导入失败，文件内容不符合导入条件");
}
}
else
{
MessageBox.Show("没有保存的数据");
}
}
BLL代码：
public int InsertEREXCL5(Dictionary[] bys)
{
int numb = 0;
foreach ( Dictionary item in bys)
{
//时间转换
DateTime dt = Convert.ToDateTime("1777-1-1");
try
{
dt = Convert.ToDateTime(item[6]);
}
catch (Exception)
{
dt = Convert.ToDateTime("1777-1-1");
}
if (IIn.InsertEREXCL1(item[1],item[2], item[3], item[4], item[5], dt, item[7]) >0)
{
numb++;
}
}
return numb;
}
//item[1],item[2], item[3], item[4], item[5], dt, item[7] 对应参数
public int InsertEREXCL1(string Fixed_Assets_Code, string Capital_assets_Code, string Class_Code, string Place_Code, string Department_Code, DateTime Procurement_Date, string Manufacture)
{
lock (obinsertDao)
{
SqlParameter[] sqlPams = {
new SqlParameter("@type",SqlDbType.NChar),
new SqlParameter("@Fixed_Assets_Code",SqlDbType.NChar),
..............省略..........
};//声明SQL参数数组并实例化相关参数
sqlPams[0].Value = "InsertEREXCL";//对参数赋值
sqlPams[1].Value = Fixed_Assets_Code;//对参数赋值
....................省略.....................
//myDAL.DAL_SelectDB_Par("存储过程的名字",SQL参数数组);
return dt;
}
}