aspx.cs核心代码：
代码如下:

using System.Data.OleDb;//需要引入命名 
public void Excel_Click(object sender, EventArgs e) 
{ 
if (this.AttachmentFile.Value == "" && this.Label1.Text == "" && DropDownList2.SelectedValue == "") 
{ 
Response.Write("<script>window.alert('请选择要导入的文件')</script>"); 
} 
if (this.AttachmentFile.Value != "" && this.DropDownList2.SelectedValue == "") 
{ 
HttpFileCollection files = HttpContext.Current.Request.Files; 
HttpPostedFile postedFile = files[0]; 
fileName = System.IO.Path.GetFileName(postedFile.FileName); 
if (fileName != "") 
{ 
postedFile.SaveAs("\\\\localhost\\文件夹\\" + fileName); 
} 
string strConn; 
strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + "\\\\localhost\\文件夹\\" + fileName + ";Extended Properties=Excel 8.0;";//this.AttachmentFile.Value.ToString() 
OleDbConnection conn = new OleDbConnection(strConn); 
conn.Open(); 
DataTable sheetNames = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" }); 
foreach (DataRow dr in sheetNames.Rows) 
{ 
DropDownList2.Items.Add(dr[2].ToString()); 
} 
this.Label1.Text = "\\\\localhost\\文件夹\\" + fileName;//this.AttachmentFile.Value.ToString(); 
conn.Close(); 
} 
if (this.Label1.Text.ToString() != "" && this.DropDownList2.SelectedValue != "")// && this.DropDownList1.SelectedValue.ToString() != "全部" 
{ 
//绑定到gridview 
GridView1.DataSource = createDataSource(DropDownList2.SelectedValue.ToString(), this.Label1.Text.ToString());//, this.DropDownList1.SelectedValue.ToString() 
GridView1.DataBind(); 

} 

} 
//以Excel为数据源获取数据集 
private DataSet createDataSource(string select, string lable) 
{ 
string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + lable + ";Extended Properties=Excel 8.0;"; 
string strsql = "select 登记号码,姓名,日期,签到时间,签退时间,部门 from [" + select + "] order by 部门,日期,姓名";//excel表格的字段 
OleDbConnection conn = new OleDbConnection(strCon); 
OleDbDataAdapter da = new OleDbDataAdapter(strsql, conn); 
try 
{ 
conn.Open(); 
DataSet ds = new DataSet(); 
da.Fill(ds); 
conn.Close(); 
return ds; 
} 
catch (Exception e) 
{ 
Response.Write("<script>window.alert('没有数据,或者" + e.Message + "')</script>"); 
return null; 
} 
} 
 
以上是插入07以前版本excel 
如果07版本以后只需要做小小修改 
 代码如下:

string strCon = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + lable + ";Extended Properties=Excel 12.0;"; 

 
 




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