首先引用组件和命名空间

using Microsoft.Office.Interop.Excel;

using System.Data.OleDb;

然后把excel上传到指定路径

上传文件方法省略

最后把上传的excel变成Dataset  （复制下面的方法就可以用了)

public DataSet seachExcel(string str)  //参数为excel的路径

{

OleDbDataAdapter da = new OleDbDataAdapter();

DataSet ds = new DataSet();

DataTable dt = new DataTable();

string NameTable = "";

string ConText = "";

try

{

//获取Excel路径

FileInfo info = new FileInfo(str);

//获取文件的扩展名

string fileExt = info.Extension;

//判断用哪种连接方式

if (fileExt .ToLower() ==".xls")

{

ConText = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + str + ";Extended Properties='excel 8.0;hdr=no;IMEX=1';Persist Security Info=false";

}

else if (fileExt.ToLower() == ".xlsx")

{

ConText = "Provider=Microsoft.ACE.OLEDB.12.0; Data Source=" + str + ";Extended Properties='excel 12.0 Xml;hdr=no;IMEX=1';Persist Security Info=False";

}

//连接excel

OleDbConnection conn = new OleDbConnection(ConText);

//打开excel

conn.Open();

dt=conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables,null );

if(dt!=null && dt.Rows .Count >0)

{

//获取sheet1表单的表名

NameTable = dt.Rows[0]["TABLE_NAME"].ToString();

//获取sheet2表单的表名

//NameTable = dt.Rows[1]["TABLE_NAME"].ToString();

}

string sql = "select * from [" + NameTable + "]";

da = new OleDbDataAdapter(sql, conn);

try

{

da.Fill(ds,NameTable); //把数据填充到Dataset

}

catch

{ }

conn.Close();

}

catch

{

}

return ds; //反回Dataset

}