【C#.NET】將excel或將CSV檔案中的sheet1匯入到dataGridView1中 ,或者匯入到DataTable，匯入到DataSet
實現的效果：
using System;
using System.Data;
using System.Data.OleDb;
using System.Windows.Forms;
namespace 淘寶單據接收器
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private string filePath;
private string fileName;
private OleDbConnection conn;
private DataTable readDataTable;
private string connString;
private FileType fileType = FileType.noset;
private enum FileType
{
noset,
xls,
xlsx,
csv
}
//選擇路徑
private void SetFileInfo(string path)
{
filePath = path;
fileName = this.filePath.Remove(0, this.filePath.LastIndexOf("\\") + 1);
string filettType= fileName.Split('.')[1];
switch (filettType)//判斷選擇的檔案是xls還是XLSX,還是CSV
{
case "xls":
//connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'"; fileType = FileType.xls;
connString = "Provider=Microsoft.Ace.OleDb.12.0;" + "Data Source=" + path + ";" + "Extended Properties=Excel 8.0; ";
break;
case "xlsx":
connString = "Provider=Microsoft.Ace.OleDb.12.0;" + "Data Source=" + path + ";" + "Extended Properties=Excel 8.0; ";
//connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1;'"; fileType = FileType.xlsx;
break;
case "csv":
connString = "Provider=Microsoft.Ace.OleDb.12.0;Data Source=" + filePath.Remove(filePath.LastIndexOf("\\") + 1) + ";Extended Properties='Text;FMT=Delimited;HDR=YES;'"; fileType = FileType.csv;
//connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath.Remove(filePath.LastIndexOf("\\") + 1) + ";Extended Properties='Text;FMT=Delimited;HDR=YES;'"; fileType = FileType.csv;
break;
}
}
public DataTable ReadFile(string path)
{
try
{
if (System.IO.File.Exists(path))
{
SetFileInfo(path);
OleDbDataAdapter myCommand = null;
DataSet ds = null;
using (conn = new OleDbConnection(connString))
{
conn.Open();
DataTable schemaTable = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
//DataTable dt2 = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);//獲取選中的EXECEL裡的所有工作簿
int dtname = schemaTable.Rows.Count - 1; //提示dt2,表的第3列就是EXCEL所有工作簿的名字
string sheetName = schemaTable.Rows[dtname][2].ToString().Trim();//獲取EXECEL第一個工作簿的名字
string tableName = fileType == FileType.csv ? sheetName : sheetName;//不管是CSV還是EXE都是取第一個工作
string strExcel = string.Empty;
strExcel = "Select * From [" + tableName + "]";
myCommand = new OleDbDataAdapter(strExcel, conn);
ds = new DataSet();
ds.Clear();
myCommand.Fill(ds, tableName);
readDataTable = ds.Tables[0];
conn.Close();
this.label2.Text = sheetName;
}
}
}
catch (Exception ex)
{
MessageBox.Show("選擇的檔案匯入錯誤，請核實匯入的格式是否正確：錯誤資訊\n\r"+ex.Message);
}
finally
{
}
return readDataTable;
}
private void bttSDDataTime_Click(object sender, EventArgs e)
{
System.Windows.Forms.OpenFileDialog fd = new OpenFileDialog();//彈出選擇對話方塊
if (fd.ShowDialog() == DialogResult.OK)//選擇了需要匯入的檔案
{
this.label1.Text = fd.SafeFileName.ToString();//選擇的檔名
DataTable dt = ReadFile(fd.FileName);
this.dataGridView1.DataSource = dt;
//ExcelToDataGridView1();
}
}
//將excel中的sheet1匯入到dataGridView1中 ,或者匯入到DataTable
public DataTable ExcelToDataGridView1()
{
OleDbDataAdapter myCommand = null;
OleDbConnection conn = null;
DataTable dt = null;
DataSet ds = new DataSet();
try
{
System.Windows.Forms.OpenFileDialog fd = new OpenFileDialog();//彈出選擇對話方塊
if (fd.ShowDialog() == DialogResult.OK)//選擇了需要匯入的檔案
{
//string strConn = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" + Server.MapPath("ExcelFiles/MyExcelFile.xls") + ";Extended Properties='Excel 8.0; HDR=Yes; IMEX=1'";
//此連線只能操作Excel2007之前(.xls)檔案
//string strConn = "Provider=Microsoft.Ace.OleDb.12.0;" + "data source=" + excelFile.MapPath("ExcelFiles/Mydata2007.xlsx") + ";Extended Properties='Excel 12.0; HDR=Yes; IMEX=1'";
//此連線可以操作.xls與.xlsx檔案 (支援Excel2003 和 Excel2007 的連線字串)
//備註： "HDR=yes;"是說Excel檔案的第一行是列名而不是資料，"HDR=No;"正好與前面的相反。
// "IMEX=1 "如果列中的資料型別不一致，使用"IMEX=1"可必免資料型別衝突。
//獲取全部資料
//string exename =fd.FileName.ToString();//選擇中的檔案路徑和檔名
this.label1.Text = fd.SafeFileName.ToString();//選擇的檔名
string strConn = "Provider=Microsoft.Ace.OleDb.12.0;" + "Data Source=" + fd.FileName + ";" + "Extended Properties=Excel 8.0; ";
conn=new OleDbConnection(strConn);
conn.Open();
DataTable dt2 = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);//獲取選中的EXECEL裡的所有工作簿
int dtname = dt2.Rows.Count-1; //提示dt2,表的第3列就是EXCEL所有工作簿的名字
string sheetName =dt2.Rows[dtname][2].ToString().Trim();//獲取EXECEL第一個工作簿的名字
string strExcel =string.Format("select * from [{0}]", sheetName);
myCommand = new OleDbDataAdapter(strExcel, strConn);
myCommand.Fill(ds, sheetName);
this.dataGridView1.DataSource = ds.Tables[0].DefaultView;
dt = ds.Tables[0] as DataTable;
conn.Close();
this.label2.Text = sheetName;//選擇的檔名
}
}
catch (Exception ex)
{
MessageBox.Show("匯入EXCEL資料異常："+ex.Message);
}
finally
{
}
return dt;
// 3、需要使用的時候從dataset呼叫即可。
//例如得到excel中第i行第0列的資料的語句為：myDs.Tables[0].Rows[i].ItemArray[0].ToString() 注意都是從0開始的。
}
private void Form1_Load(object sender, EventArgs e)
{
this.label1.Text = "";
this.label2.Text = "";
}
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
}
//END
}
}