程序主要是利用SQL Server提供的SQL语句来实现备份的。
备份：use master;backup database @name to disk=@path;
恢复：use master;restore database @name from disk=@path;
上面用的是参数化SQL语句，可以在程序执行的时候动态给参数赋值。
实例代码如下：
.aspx代码：
.CS代码：
using ...System; 
using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; 
using System.Data.SqlClient; public partial class _Default : System.Web.UI.Page ...{ 
protected void Page_Load(object sender, EventArgs e) 
...{ if (!Page.IsPostBack) ...{ //在DropDownList中绑定所有数据库 SqlConnection connection = new SqlConnection("Data Source=(local);User ID=ASPXCS;Password=ASPXCS"); SqlCommand command = new SqlCommand("sp_helpdb", connection); command.CommandType = CommandType.StoredProcedure; connection.Open(); SqlDataReader reader = command.ExecuteReader(); ddlDatabaseList.DataSource = reader; ddlDatabaseList.DataTextField = "Name"; ddlDatabaseList.DataBind(); reader.Close(); connection.Close(); 
} } protected void btnOK_Click(object sender, EventArgs e) ...{ string dbFileName = txtDbFileName.Text.Trim(); SqlConnection connection = new SqlConnection("Data Source=(local);User ID=ASPXCS;Password=ASPXCS"); string dbName = ddlDatabaseList.SelectedValue; if (!dbFileName.EndsWith(".bak")) ...{ dbFileName += ".bak"; } if (rbBackup.Checked)//备份数据库 ...{ SqlCommand command = new SqlCommand("use master;backup database @name to disk=@path;", connection); connection.Open(); string path = Server.MapPath("~\\App_Data") + "\\" + dbFileName; command.Parameters.AddWithValue("@name", dbName); command.Parameters.AddWithValue("@path", path); command.ExecuteNonQuery(); connection.Close(); } else//恢复数据库 ...{ SqlCommand command = new SqlCommand("use master;restore database @name from disk=@path;", connection); connection.Open(); string path = Server.MapPath("~\\App_Data") + "\\" + dbFileName; command.Parameters.AddWithValue("@name", dbName); command.Parameters.AddWithValue("@path", path); command.ExecuteNonQuery(); connection.Close(); } } }以上代码是完整的实例，大家可直接复制进行测试！也可方便大家直接使用！