从SQL Server中读写大数据列。- ASP.NET

当前位置: 首页 > 图文教程 > 网络编程 > ASP.NET > 从SQL Server中读写大数据列。

技术文章搜索

关键字

出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-11-03 浏览: 103 ::

收藏到网摘: n/a

/* Author:Wu Xiuxiang; Email:[email protected]
*/
public static void Main()

{

//写入大对象到SqlServer

FileStream fs = new FileStream("C:\\test.bmp",FileMode.OPen,FileAccess.Read);

BinaryReader br = new BinaryReader(fs);

SqlConnection conn = new SqlConnection("server=localhost;uid=sa;pwd=sa;database=northwind");

string cmdText = "UPDATE EMPLOYEES" +

"SET Photo=@image where EmployeeId=1";

SqlCommand cmd = new SqlCommand(cmdText,conn);

cmd.Parameters.Add("@image",SqlDbType.Image);

cmd.Parameters["@image"].Value = br.ReadBytes((int)br.BaseStream.Length);

conn.Open();

int i=cmd.ExecuteNoQuery();

//从SQL Server中读取大对象

string cmdtext = "SELECT employeeid,photo" +

" from employees where employeeid = 1";

SqlCommand cmd2 = new SqlCommand(cmdtext,conn);