C# 仅当我将| DataDirectory |连接字符串放入app.config中时,数据库备份或还原才起作用
我正在使用visual studio 2012服务库数据库。我认为它是备份,因为我看到了一个.BAK文件,但当我恢复时,它不起作用。两者在运行时都没有错误,但我认为我的代码有问题。这是我的密码:C# 仅当我将| DataDirectory |连接字符串放入app.config中时,数据库备份或还原才起作用,c#,sql-server,database,database-backups,C#,Sql Server,Database,Database Backups,我正在使用visual studio 2012服务库数据库。我认为它是备份,因为我看到了一个.BAK文件,但当我恢复时,它不起作用。两者在运行时都没有错误,但我认为我的代码有问题。这是我的密码: private void btnBackUp_Click(object sender, EventArgs e) { try { progressBar1.Visible = true; pro
private void btnBackUp_Click(object sender, EventArgs e)
{
try
{
progressBar1.Visible = true;
progressBar1.Value = 15;
bool bBackUpStatus = true;
Cursor.Current = Cursors.WaitCursor;
if (Directory.Exists(@"D:\Backup_MAConvent"))
{
if (File.Exists(@"D:\Backup_MAConvent\MAConvent_Backup.bak"))
{
if (MessageBox.Show(@"Do you want to replace it?", "Back", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
File.Delete(@"D:\Backup_MAConvent\MAConvent_Backup.bak");
}
else
bBackUpStatus = false;
}
}
else
Directory.CreateDirectory(@"D:\Backup_MAConvent");
if (bBackUpStatus)
{
con.Open();
progressBar1.Value = 25;
string path1 = System.IO.Path.GetFullPath(@"SchoolDatabase.mdf");
SqlCommand cmd2 = new SqlCommand("backup database [" + path1 + @"] to disk ='D:\Backup_MAConvent\MAConvent_Backup.bak' with init,stats=10", con);
cmd2.ExecuteNonQuery();
progressBar1.Value = 35;
con.Close();
timer1.Start();
MessageBox.Show("Backup of the Database saved Successfully", "Back", MessageBoxButtons.OK, MessageBoxIcon.Information);
timer1.Stop();
progressBar1.Value = 10;
progressBar1.Visible = false;
}
}
catch
{
MessageBox.Show(@"Backup Error, Please close the software & restart and then try again to backup", "Backup", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
private void btnRestore_Click(object sender, EventArgs e)
{
Cursor.Current = Cursors.WaitCursor;
progressBar1.Visible = true;
progressBar1.Value = 15;
try
{
if (File.Exists(@"D:\Backup_MAConvent\MAConvent_Backup.bak"))
{
if (MessageBox.Show("Are you sure you restore?", "Back", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
con.Open();
progressBar1.Value = 25;
SqlCommand cmd;
cmd = new SqlCommand("use master", con);
cmd.ExecuteNonQuery();
progressBar1.Value = 35;
string path1 = System.IO.Path.GetFullPath(@"SchoolDatabase.mdf");
cmd = new SqlCommand("restore database [" + path1 + @"] from disk = 'D:\Backup_MAConvent\MAConvent_Backup.bak'", con);
cmd.ExecuteNonQuery();
con.Close();
timer1.Start();
MessageBox.Show("Database has been Restored", "Restoration", MessageBoxButtons.OK, MessageBoxIcon.Information);
timer1.Stop();
progressBar1.Value = 10;
progressBar1.Visible = false;
}
}
else
{
MessageBox.Show(@"This is not in the correct path, Please close the software & restart and then try again to restore", "Restoration", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
catch (Exception exp)
{
MessageBox.Show(exp.Message);
}
}
private void timer1_Tick(object sender, EventArgs e)
{
try
{
progressBar1.Value = 50;
progressBar1.PerformStep();
if (progressBar1.Value <= progressBar1.Maximum)
timer1.Stop();
progressBar1.Value = progressBar1.Maximum;
}
catch
{
}
}
但我不想使用| DataDirectory |字符串。请建议在备份和还原代码中更改什么?请帮忙
提前谢谢我自己找到了答案。如果将来有人遇到同样的问题,我在这里提供答案。 值得注意的是,一个项目中有两个数据库,即一个数据库是主应用程序目录数据库,另一个是输出数据库。当我们开始调试时,主数据库将所有表及其数据复制到输出目录数据库中,通常
\bin\Debug\database.mdf
。因此,如果我们在连接字符串中使用| DataDirectory |
,备份会很好地工作,但这不是一个好方法,因为通过这样做,我们将所有数据恢复到\bin数据库中,仅用于输出。因此,我们应提供如下完整的连接字符串:
<connectionStrings>
<add name="SchoolManagement.Properties.Settings.SchoolDatabaseConnectionString"
connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=G:\Users\ABC\documents\visual studio 2012\Projects\SchoolManagement\SchoolManagement\SchoolDatabase.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\SchoolDatabase.mdf;Integrated Security=True;User Instance=True"
<connectionStrings>
<add name="SchoolManagement.Properties.Settings.SchoolDatabaseConnectionString"
connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=G:\Users\ABC\documents\visual studio 2012\Projects\SchoolManagement\SchoolManagement\SchoolDatabase.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
string path1 = System.IO.Path.GetFullPath(@"G:\Users\ABC\documents\visual studio 2012\Projects\SchoolManagement\SchoolManagement\SchoolDatabase.mdf");
SqlCommand cmd2 = new SqlCommand("backup database [" + path1 + @"] to disk ='D:\Backup_MAConvent\MAConvent_Backup.bak' with init,stats=10", con);
cmd2.ExecuteNonQuery();