从excel读数据写入数据库代码

protected void readFromDB_Click(object sender, EventArgs e)
{
string strConn = ConfigurationManager.AppSettings["strConn"].ToString();
DataSet ds = new DataSet();
using (SqlConnection conn = new SqlConnection(strConn))
{

string sql = "select * from users";
SqlDataAdapter sda = new SqlDataAdapter(sql, conn);
sda.Fill(ds, "users");//Fill方法会判断连接是否打开，没有则隐式打开，使用完后关闭
}

//将DS绑定到GridView
GridView1.DataSource = ds.Tables["users"];
GridView1.DataBind();
}

protected void Import_Click(object sender, EventArgs e)
{
string filePath = "";
string getErrMsg = "";
DataSet excelDs = new DataSet();

if (FileUpload1.PostedFile.FileName == "")
{
Response.Write("<script language=javascript>alert('请选择要上传的文件！');</script>");
return;
}

//从Excel读取数据
filePath = FileUpload1.PostedFile.FileName;
string connString = "Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\";Data Source=" + filePath;
OleDbConnection excelConn = new OleDbConnection(connString);
OleDbDataAdapter ExcelDA = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", excelConn);

try
{
ExcelDA.Fill(excelDs, "users");
}
catch (Exception err)
{
Response.Write(err.Message);
}
finally
{
excelConn.Close();
excelConn = null;
}

//将数据写入数据库
if (excelDs.Tables[0].Rows.Count != 0)
{
string sql = "";
string strConn = ConfigurationManager.AppSettings["strConn"];
SqlConnection sqlConn = new SqlConnection(strConn);
sqlConn.Open();

try
{
for (int i = 0; i < excelDs.Tables[0].Rows.Count; i++)
{
sql = "insert into users(userID, userName, address) values('" + excelDs.Tables[0].Rows[i]["ID"].ToString() + "','" + excelDs.Tables[0].Rows[i]["用户名"].ToString() + "','" + excelDs.Tables[0].Rows[i]["地址"].ToString() + "')";
SqlCommand cmd = new SqlCommand(sql, sqlConn);
cmd.ExecuteNonQuery();
}
}
catch (Exception ex)
{
getErrMsg = ex.Message.ToString();
Response.Write(ex.Message.ToString());
}
finally
{
sqlConn.Close();
sqlConn = null;
}
}

//返回提示信息
if (getErrMsg == "" || getErrMsg == null)
{
Response.Write("<script language='Javascript'>alert('导入成功！')</script>");
return;
}
else
{
Response.Write("<script language='Javascript'>alert('导入失败！')</script>");
return;
}
}