在asp.net中备份还原SQL Server数据库
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在asp.net中备份还原SQL Server数据库
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在web中，安全性主要體現(xiàn)在兩個(gè)方面：一個(gè)是程序安全性，即防止網(wǎng)頁(yè)在插入惡意代碼；另一個(gè)是數(shù)據(jù)庫(kù)安全性，這個(gè)我們可以經(jīng)常備份數(shù)據(jù)庫(kù)來(lái)實(shí)現(xiàn)。
在文中，我將演示如果在網(wǎng)頁(yè)中備份和恢復(fù)數(shù)據(jù)庫(kù)。
??????? 其實(shí)備份和恢復(fù)數(shù)據(jù)庫(kù)都是利用SQL Server提供的SQL語(yǔ)句來(lái)備份的。
備份：use master;backup database @name to disk=@path;
恢復(fù)：use master;restore database @name from disk=@path;
??????? 上面用的是參數(shù)化SQL語(yǔ)句，可以在程序執(zhí)行的時(shí)候動(dòng)態(tài)給參數(shù)賦值。 代碼： 1. <%@ Page Language="C#" AutoEventWireup="true" CodeFile="DatabaseAction.aspx.cs" Inherits="DatabaseAction" %>
???? 2.
???? 3. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
???? 4.
???? 5. <html xmlns="http://www.w3.org/1999/xhtml" >
???? 6. <head runat="server">
???? 7.???????? <title>無(wú)標(biāo)題頁(yè)</title>
???? 8. </head>
???? 9. <body>
????10.???????? <form id="form1" runat="server">
????11.???????? <div>
????12.???????? <table border="0" width="100%">
????13.???????? <tr><td colspan="2">數(shù)據(jù)庫(kù)還原和備份</td></tr>
????14.???????? <tr><td>請(qǐng)選擇數(shù)據(jù)庫(kù)</td><td>
????15.???????????????? <asp:DropDownList ID="ddlDatabaseList" runat="server">
????16.???????????????? </asp:DropDownList></td></tr>
????17.???????? <tr><td>
????18.???????????????? 數(shù)據(jù)庫(kù)文件名</td><td>
????19.???????????????? <asp:TextBox ID="txtDbFileName" runat="server"></asp:TextBox></td></tr>
????20.???????? <tr><td>
????21.???????????????? 操作選項(xiàng)</td><td>
????22.???????????????? <asp:RadioButton ID="rbBackup" runat="server" Checked="True" GroupName="action" Text="備份" />
????23.???????????????? <asp:RadioButton ID="rbRestore" runat="server" GroupName="action" Text="還原" /></td></tr>
????24.???????????????? <tr><td>
????25.???????????????? 操作</td><td>
????26.????????????????????????????<asp:Button ID="btnOK" runat="server" OnClick="btnOK_Click" Text="執(zhí)行" /></td></tr>
????27.???????? </table>
????28.???????? </div>
????29.???????? </form>
????30. </body>
????31. </html> 后臺(tái)代碼： 1. using System;
???? 2. using System.Data;
???? 3. using System.Configuration;
???? 4. using System.Collections;
???? 5. using System.Web;
???? 6. using System.Web.Security;
???? 7. using System.Web.UI;
???? 8. using System.Web.UI.WebControls;
???? 9. using System.Web.UI.WebControls.WebParts;
????10. using System.Web.UI.HtmlControls;
????11. using System.Data.SqlClient;
????12.
????13. /// <summary>
????14. /// 功能說(shuō)明：本例中演示在asp.net中如何備份和恢復(fù)數(shù)據(jù)庫(kù)
????15. /// 備份數(shù)據(jù)庫(kù)主要使用數(shù)據(jù)庫(kù)的備份語(yǔ)句。數(shù)據(jù)庫(kù)備份文件放在
????16. /// App_Data文件夾下。
????17. /// 作者：周公
????18. /// 日期：2008-08-19
????19. /// 首發(fā)地址：http://blog.csdn.net/zhoufoxcn/archive/2008/08/19/2796077.aspx
????20. /// </summary>
????21. public partial class DatabaseAction : System.Web.UI.Page
????22. {
void Page_Load() void Page_Load(object sender, EventArgs e)
????24.???????? {
????25.???????????????? if (!Page.IsPostBack)
????26.???????????????? {
????27.???????????????????????? //在DropDownList中綁定所有數(shù)據(jù)庫(kù)
????28.???????????????????????? SqlConnection connection = new SqlConnection("Data Source=ZHOUFOXCN;User ID=sa;Password=sa");
????29.???????????????????????? SqlCommand command = new SqlCommand("sp_helpdb", connection);
????30.???????????????????????? command.CommandType = CommandType.StoredProcedure;
????31.???????????????????????? connection.Open();
????32.???????????????????????? SqlDataReader reader = command.ExecuteReader();
????33.???????????????????????? ddlDatabaseList.DataSource = reader;
????34.???????????????????????? ddlDatabaseList.DataTextField = "Name";
????35.???????????????????????? ddlDatabaseList.DataBind();
????36.???????????????????????? reader.Close();
????37.???????????????????????? connection.Close();
????38.???????????????? }
????39.???????? }
void btnOK_Click() void btnOK_Click(object sender, EventArgs e)
????41.???????? {
????42.???????????????? string dbFileName = txtDbFileName.Text.Trim();
????43.???????????????? SqlConnection connection = new SqlConnection("Data Source=ZHOUFOXCN;User ID=sa;Password=sa");
????44.???????????????? string dbName = ddlDatabaseList.SelectedValue;
????45.???????????????? if (!dbFileName.EndsWith(".bak"))
????46.???????????????? {
????47.???????????????????????? dbFileName += ".bak";
????48.???????????????? }
????49.???????????????? if (rbBackup.Checked)//備份數(shù)據(jù)庫(kù)
????50.???????????????? {
????51.???????????????????????? SqlCommand command = new SqlCommand("use master;backup database @name to disk=@path;",connection);
????52.???????????????????????? connection.Open();
????53.???????????????????????? string path=Server.MapPath("~\\App_Data")+"\\"+dbFileName;
????54.???????????????????????? command.Parameters.AddWithValue("@name", dbName);
????55.???????????????????????? command.Parameters.AddWithValue("@path", path);
????56.???????????????????????? command.ExecuteNonQuery();
????57.???????????????????????? connection.Close();
????58.???????????????? }
????59.???????????????? else//恢復(fù)數(shù)據(jù)庫(kù)
????60.???????????????? {
????61.???????????????????????? SqlCommand command = new SqlCommand("use master;restore database @name from disk=@path;", connection);
????62.???????????????????????? connection.Open();
????63.???????????????????????? string path = Server.MapPath("~\\App_Data") + "\\" + dbFileName;
????64.???????????????????????? command.Parameters.AddWithValue("@name", dbName);
????65.???????????????????????? command.Parameters.AddWithValue("@path", path);
????66.???????????????????????? command.ExecuteNonQuery();
????67.???????????????????????? connection.Close();
????68.???????????????? }
????69.???????? }
????70. } 以上代碼在WindowsXP+VisualStudio2005+SQL Server2000下測(cè)試通過(guò)
在文中，我將演示如果在網(wǎng)頁(yè)中備份和恢復(fù)數(shù)據(jù)庫(kù)。
??????? 其實(shí)備份和恢復(fù)數(shù)據(jù)庫(kù)都是利用SQL Server提供的SQL語(yǔ)句來(lái)備份的。
備份：use master;backup database @name to disk=@path;
恢復(fù)：use master;restore database @name from disk=@path;
??????? 上面用的是參數(shù)化SQL語(yǔ)句，可以在程序執(zhí)行的時(shí)候動(dòng)態(tài)給參數(shù)賦值。 代碼： 1. <%@ Page Language="C#" AutoEventWireup="true" CodeFile="DatabaseAction.aspx.cs" Inherits="DatabaseAction" %>
???? 2.
???? 3. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
???? 4.
???? 5. <html xmlns="http://www.w3.org/1999/xhtml" >
???? 6. <head runat="server">
???? 7.???????? <title>無(wú)標(biāo)題頁(yè)</title>
???? 8. </head>
???? 9. <body>
????10.???????? <form id="form1" runat="server">
????11.???????? <div>
????12.???????? <table border="0" width="100%">
????13.???????? <tr><td colspan="2">數(shù)據(jù)庫(kù)還原和備份</td></tr>
????14.???????? <tr><td>請(qǐng)選擇數(shù)據(jù)庫(kù)</td><td>
????15.???????????????? <asp:DropDownList ID="ddlDatabaseList" runat="server">
????16.???????????????? </asp:DropDownList></td></tr>
????17.???????? <tr><td>
????18.???????????????? 數(shù)據(jù)庫(kù)文件名</td><td>
????19.???????????????? <asp:TextBox ID="txtDbFileName" runat="server"></asp:TextBox></td></tr>
????20.???????? <tr><td>
????21.???????????????? 操作選項(xiàng)</td><td>
????22.???????????????? <asp:RadioButton ID="rbBackup" runat="server" Checked="True" GroupName="action" Text="備份" />
????23.???????????????? <asp:RadioButton ID="rbRestore" runat="server" GroupName="action" Text="還原" /></td></tr>
????24.???????????????? <tr><td>
????25.???????????????? 操作</td><td>
????26.????????????????????????????<asp:Button ID="btnOK" runat="server" OnClick="btnOK_Click" Text="執(zhí)行" /></td></tr>
????27.???????? </table>
????28.???????? </div>
????29.???????? </form>
????30. </body>
????31. </html> 后臺(tái)代碼： 1. using System;
???? 2. using System.Data;
???? 3. using System.Configuration;
???? 4. using System.Collections;
???? 5. using System.Web;
???? 6. using System.Web.Security;
???? 7. using System.Web.UI;
???? 8. using System.Web.UI.WebControls;
???? 9. using System.Web.UI.WebControls.WebParts;
????10. using System.Web.UI.HtmlControls;
????11. using System.Data.SqlClient;
????12.
????13. /// <summary>
????14. /// 功能說(shuō)明：本例中演示在asp.net中如何備份和恢復(fù)數(shù)據(jù)庫(kù)
????15. /// 備份數(shù)據(jù)庫(kù)主要使用數(shù)據(jù)庫(kù)的備份語(yǔ)句。數(shù)據(jù)庫(kù)備份文件放在
????16. /// App_Data文件夾下。
????17. /// 作者：周公
????18. /// 日期：2008-08-19
????19. /// 首發(fā)地址：http://blog.csdn.net/zhoufoxcn/archive/2008/08/19/2796077.aspx
????20. /// </summary>
????21. public partial class DatabaseAction : System.Web.UI.Page
????22. {
void Page_Load() void Page_Load(object sender, EventArgs e)
????24.???????? {
????25.???????????????? if (!Page.IsPostBack)
????26.???????????????? {
????27.???????????????????????? //在DropDownList中綁定所有數(shù)據(jù)庫(kù)
????28.???????????????????????? SqlConnection connection = new SqlConnection("Data Source=ZHOUFOXCN;User ID=sa;Password=sa");
????29.???????????????????????? SqlCommand command = new SqlCommand("sp_helpdb", connection);
????30.???????????????????????? command.CommandType = CommandType.StoredProcedure;
????31.???????????????????????? connection.Open();
????32.???????????????????????? SqlDataReader reader = command.ExecuteReader();
????33.???????????????????????? ddlDatabaseList.DataSource = reader;
????34.???????????????????????? ddlDatabaseList.DataTextField = "Name";
????35.???????????????????????? ddlDatabaseList.DataBind();
????36.???????????????????????? reader.Close();
????37.???????????????????????? connection.Close();
????38.???????????????? }
????39.???????? }
void btnOK_Click() void btnOK_Click(object sender, EventArgs e)
????41.???????? {
????42.???????????????? string dbFileName = txtDbFileName.Text.Trim();
????43.???????????????? SqlConnection connection = new SqlConnection("Data Source=ZHOUFOXCN;User ID=sa;Password=sa");
????44.???????????????? string dbName = ddlDatabaseList.SelectedValue;
????45.???????????????? if (!dbFileName.EndsWith(".bak"))
????46.???????????????? {
????47.???????????????????????? dbFileName += ".bak";
????48.???????????????? }
????49.???????????????? if (rbBackup.Checked)//備份數(shù)據(jù)庫(kù)
????50.???????????????? {
????51.???????????????????????? SqlCommand command = new SqlCommand("use master;backup database @name to disk=@path;",connection);
????52.???????????????????????? connection.Open();
????53.???????????????????????? string path=Server.MapPath("~\\App_Data")+"\\"+dbFileName;
????54.???????????????????????? command.Parameters.AddWithValue("@name", dbName);
????55.???????????????????????? command.Parameters.AddWithValue("@path", path);
????56.???????????????????????? command.ExecuteNonQuery();
????57.???????????????????????? connection.Close();
????58.???????????????? }
????59.???????????????? else//恢復(fù)數(shù)據(jù)庫(kù)
????60.???????????????? {
????61.???????????????????????? SqlCommand command = new SqlCommand("use master;restore database @name from disk=@path;", connection);
????62.???????????????????????? connection.Open();
????63.???????????????????????? string path = Server.MapPath("~\\App_Data") + "\\" + dbFileName;
????64.???????????????????????? command.Parameters.AddWithValue("@name", dbName);
????65.???????????????????????? command.Parameters.AddWithValue("@path", path);
????66.???????????????????????? command.ExecuteNonQuery();
????67.???????????????????????? connection.Close();
????68.???????????????? }
????69.???????? }
????70. } 以上代碼在WindowsXP+VisualStudio2005+SQL Server2000下測(cè)試通過(guò)
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