读取excel文件
public DataSet getData()
{
//打开文件
OpenFileDialog file = new OpenFileDialog();
file.Filter = "Excel(*.xlsx)|*.xlsx|Excel(*.xls)|*.xls";
file.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
file.Multiselect = false;
if (file.ShowDialog() == DialogResult.Cancel)
return null;
//判断文件后缀
var path = file.FileName;
string fileSuffix = System.IO.Path.GetExtension(path);
if (string.IsNullOrEmpty(fileSuffix))
return null;
using (DataSet ds = new DataSet())
{
//判断Excel文件是2003版本还是2007版本
string connString = "";
if (fileSuffix == ".xls")
connString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + path + ";" + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\"";
else
connString = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + path + ";" + ";Extended Properties=\"Excel 12.0;HDR=YES;IMEX=1\"";
//读取文件
string sql_select = " SELECT * FROM [Sheet1$]";
using (OleDbConnection conn = new OleDbConnection(connString))
using (OleDbDataAdapter cmd = new OleDbDataAdapter(sql_select, conn))
{
conn.Open();
cmd.Fill(ds);
}
if (ds == null || ds.Tables.Count <= 0) return null;
return ds;
}
}