收集SQL数据库备份一段代码

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<% @Import Namespace="System.Data" %>
<% @Import Namespace="System.Data.SqlClient" %>
<HTML>
<HEAD>
<title>获取服务器端数据库列表示例</title>
<script language="C#" runat="server">

// 注意本节的数据库连接字符串
string ConnStr = System.Configuration.ConfigurationSettings.AppSettings["car"];

void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
// 创建连接及执行数据库操作
string db_query = "sp_helpdb";

SqlCommand myCommand = new SqlCommand(db_query, new SqlConnection(ConnStr));
myCommand.Connection.Open();
SqlDataReader dr = myCommand.ExecuteReader();

// 将数据库列表绑定到下拉列表控件(DropDownList)
dbDropDownList.DataSource = dr;
dbDropDownList.DataTextField = "name";
dbDropDownList.DataBind();

//关闭DataReader对象和数据库连接
dr.Close();
myCommand.Connection.Close();
}
}

void dbDropDownList_SelectedIndexChanged(object sender, System.EventArgs e)
{
pathTextBox.Text = @"d:/backup/" + dbDropDownList.SelectedValue + ".bak";
}

void backupButton_Click(object sender, System.EventArgs e)
{
string path = pathTextBox.Text;
string dbname = dbDropDownList.SelectedValue;

string backupSql = "use master;";
backupSql += "backup database @dbname to disk = @path;";

SqlCommand myCommand = new SqlCommand(backupSql, new SqlConnection(ConnStr));

myCommand.Parameters.Add("@dbname", SqlDbType.Char);
myCommand.Parameters["@dbname"].Value = dbname;
myCommand.Parameters.Add("@path", SqlDbType.Char);
myCommand.Parameters["@path"].Value = path;

try
{
myCommand.Connection.Open();
myCommand.ExecuteNonQuery();
infoLabel.Text = "备份成功";
}
catch(Exception ex)
{
infoLabel.Text = "备份失败<br/>" + ex.ToString();
}
finally
{
myCommand.Connection.Close();
}
}

</script>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<h3>获取服务器端数据库列表示例</h3>
数据库列表：
<asp:dropdownlist id="dbDropDownList" runat="server" AutoPostBack="True"
OnSelectedIndexChanged="dbDropDownList_SelectedIndexChanged"></asp:dropdownlist>
<br/><br/>
请输入备份目录及备份文件名：
<asp:textbox id="pathTextBox" runat="server" Width="224px">
d:/backup/Northwind.bak</asp:textbox>（目录必须存在）
<br/><br/>
<asp:button id="backupButton" runat="server" Font-Size="9pt" Text="备份数据库"
OnClick="backupButton_Click"></asp:button>
<br/>
<asp:Label id="infoLabel" runat="server"></asp:Label>
</form>
</body>
</HTML>