excel导入DataTable

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Office.Interop.Excel;
using System.IO;
using System.Reflection;
using System.Data.OleDb;

private void Bingdgv()
{
if (FilePath == "")
{
return;
}
try
{
OleDbConnection conn = new OleDbConnection(ExcelConnStr);
string sql = "select * from [Sheet1$]";
if (conn.State == ConnectionState.Closed)
{
conn.Open();
}
OleDbDataAdapter myCommand = new OleDbDataAdapter(sql, conn);
ds = new DataSet();
myCommand.Fill(ds, "[Sheet1$]");
conn.Close();

dgvData.DataMember = "[Sheet1$]";
dgvData.DataSource = ds;
conn.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
throw ex;
}
}

“System.Data.DataTable”和“Microsoft.Office.Interop.Excel.DataTable”之间的不明确的引用

DataTable dt=new DataTable();了吗??
引用了 uisng System.Data;吗??

using Excel = Microsoft.Office.Interop.Excel;
这样就OK了，呵呵