当前位置:跳过导航链接计算机毕业设计首页 : 技术应用 : 详细内容

C#实现数据库备份和还原

来源:xiaoniu168.com 作者:本站原创 添加时间:2012-05-10 点击数:4476

本文主要介绍如何利用c#实现数据库的备份和还原:

1、数据库备份操作

 if (MessageBox.Show("确定要备份数据库吗?", "提示框", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {
                saveFileDialog1.Filter = "数据库文件|*.bak";
                if (saveFileDialog1.ShowDialog() == DialogResult.OK)
                {
                    string path = saveFileDialog1.FileName;
                    if (File.Exists(path))
                    {
                        File.Delete(path);//注意,这个步骤很重要,如果重复,在备份的数据,就会变成,

                        //你刚开始的数据,所以每次都要先删除.

                    }
                    if (!File.Exists(path))
                    {
                        FileStream fs = File.Create(path);

                        fs.Close();
                    }
                    string backupstr = "backup database SMDB to disk='" + path + "';";
                    bool re = SQL.sqlcon(backupstr);//执行语句
                  
                    MessageBox.Show("备份成功!");
                  
                }

            }

2、数据库还原操作:

 if (MessageBox.Show("确定要还原数据库吗?", "提示框", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {
                openFileDialog1.Filter = "数据库文件|*.bak";
                if (openFileDialog1.ShowDialog() == DialogResult.OK)
                {
                    string path = openFileDialog1.FileName;
                    string backupstr = "use master ";
                    string s1 = " ALTER DATABASE SMDB SET OFFLINE WITH ROLLBACK IMMEDIATE";
                    string s2 = " Restore Database SMDB From disk='" + path + "' with REPLACE";
                    string s3 = " ALTER DATABASE SMDB SET ONLINE WITH ROLLBACK IMMEDIATE";
                    string sSql = backupstr + s1 + s2 + s3;
                    SQL.sqlcon(sSql);//执行语句                 
                    MessageBox.Show("恢复成功!");
                  
                }
            }

<责任编辑:计算机毕业设计网(http://www.xiaoniu168.com)>

第1页

下一篇:

【联系方式】

【本站信誉】

用心做计算机毕业设计论文网
计算机毕业设计客服
计算机毕业论文客服在线 计算机毕业论文客服在线
计算机毕业论文在线,计算机毕业设计在线