default.aspx.cs

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using System;
using System.Data;
using System.Configuration;
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;
using System.IO;

public partial class _Default : System.Web.UI.Page 
{
    SqlConnection myConn;
    SqlCommand myCmd;
    SqlDataAdapter adapter;
    DataSet ds;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            myConn = new SqlConnection("server=a\\mr;database=master;UID=sa;PassWord=''");
            string strSql = "Exec sp_helpdb";
            adapter = new SqlDataAdapter(strSql, myConn);
            ds = new DataSet();
            adapter.Fill(ds);
            this.DropDownList1.DataSource = ds.Tables[0].DefaultView;
            this.DropDownList1.DataTextField = "name";
            this.DropDownList1.DataBind();
            myConn.Dispose();
            adapter.Dispose();
            ds.Dispose();
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string strSql1 = "server=a\\mr;database='"+this.DropDownList1.SelectedValue+"';UID=sa;PassWord=''";
        string strSql2 = "backup database "+this.DropDownList1.SelectedValue+" to disk='"+this.TextBox1.Text.Trim()+".bak'";
        try
        {
            myConn = new SqlConnection(strSql1);
            myCmd = new SqlCommand(strSql2, myConn);
            myConn.Open();
            string backFile = this.TextBox1.Text.Trim() + ".bak";
            if (File.Exists(backFile))
            {
                Response.Write("<script>alert('此文件已存在，请重新输入！');location='Default.aspx'</script>");
                return;
            }
            myCmd.ExecuteNonQuery();
            Response.Write("<script>alert('备份数据成功！');location='Default.aspx'</script>");
        
        }
        catch (Exception ex)
        {
            Response.Write(ex.Message.ToString());
            Response.Write("<script>alert('备份数据失败！');location='Default.aspx'</script>");
        }
        finally
        {
            myConn.Close();
            myConn.Dispose();
            myCmd.Dispose();
            
        }
    }
}