Asp.net 数据库不存在
这是我备份数据库的代码。Asp.net 数据库不存在,asp.net,database,Asp.net,Database,这是我备份数据库的代码。 这些是我的数据库: 我得到了这个错误: 数据库“BakupDB”不存在。确保输入了名称 正确地备份数据库正在异常终止 以及我的网页的代码: public partial class Default2 : System.Web.UI.Page { string dbname = "BakupDB"; SqlConnection sqlcon = new SqlConnection(); SqlCommand sqlcmd = new SqlCom
这些是我的数据库:
我得到了这个错误: 数据库“BakupDB”不存在。确保输入了名称 正确地备份数据库正在异常终止 以及我的网页的代码:
public partial class Default2 : System.Web.UI.Page
{
string dbname = "BakupDB";
SqlConnection sqlcon = new SqlConnection();
SqlCommand sqlcmd = new SqlCommand();
SqlDataAdapter da = new SqlDataAdapter();
DataTable dt = new DataTable();
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click1(object sender, EventArgs e)
{
//Mentioned Connection string make sure that user id and password sufficient previlages
sqlcon.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\BakupDB.mdf;Integrated Security=True;User Instance=True";
//Enter destination directory where backup file stored
string destdir = "D:\\backupdb";
try
{
sqlcon.Open();
sqlcmd = new SqlCommand("backup database "+dbname+" to disk='" + destdir + "\\" + DateTime.Now.ToString("ddMMyyyy_HHmmss") + ".Bak'", sqlcon);
sqlcmd.ExecuteNonQuery();
sqlcon.Close();
Response.Write("Backup database successfully");
}
catch (Exception ex)
{
Response.Write("Error During backup database!");
}
}
}
我做错了什么?看起来你在尝试使用一种新的方法。顺便说一句(与您的问题没有100%的关联),我认为此功能在SQL Server Express 2012中已被弃用(并且自SQL Server 2008以来一直处于弃用状态) 对不起,我把它放在一边了。关于您的问题,以下内容可能会对您有所帮助:
- 使用
sqlcon.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\BakupDB.mdf;Integrated Security=True;User Instance=True";
缺少一个Database=
节,因此可能应该如下所示:
sqlcon.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\BakupDB.mdf;Integrated Security=True;User Instance=True;Database=BakupDB";
看起来你在试着使用一种新的方法。顺便说一句(与您的问题没有100%的关联),我认为此功能在SQL Server Express 2012中已被弃用(并且自SQL Server 2008以来一直处于弃用状态) 对不起,我把它放在一边了。关于您的问题,以下内容可能会对您有所帮助:
- 使用
sqlcon.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\BakupDB.mdf;Integrated Security=True;User Instance=True";
缺少一个Database=
节,因此可能应该如下所示:
sqlcon.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\BakupDB.mdf;Integrated Security=True;User Instance=True;Database=BakupDB";
这个代码对我有用:
private void button5_Click(object sender, EventArgs e)
{
try
{
string dlink= @"DataSource=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\jsdb.mdf; Database=jsdb; User Instance=True; Integrated Security=True;Asynchronous Processing= True";
SqlConnection dcc = new SqlConnection(dlink);
dcc.Open();
string database = "jsdb";
string blc = textBox1.Text; //(Its the location to save the file)
string nm = "dbBackup";
string dt =DateTime.Today.ToShortDateString();
string sl = "BACKUP DATABASE "+database+" TO DISK = '"+blc+"\\"+nm+"-"+dt+".bak'" ;
SqlCommand cql = new SqlCommand(sl,dcc);
cql.ExecuteNonQuery();
MessageBox.Show("Database backup completed successfully..");
dcc.Close();
}
catch (Exception ex)
{ MessageBox.Show(ex.Message); }
}
这个代码对我有用:
private void button5_Click(object sender, EventArgs e)
{
try
{
string dlink= @"DataSource=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\jsdb.mdf; Database=jsdb; User Instance=True; Integrated Security=True;Asynchronous Processing= True";
SqlConnection dcc = new SqlConnection(dlink);
dcc.Open();
string database = "jsdb";
string blc = textBox1.Text; //(Its the location to save the file)
string nm = "dbBackup";
string dt =DateTime.Today.ToShortDateString();
string sl = "BACKUP DATABASE "+database+" TO DISK = '"+blc+"\\"+nm+"-"+dt+".bak'" ;
SqlCommand cql = new SqlCommand(sl,dcc);
cql.ExecuteNonQuery();
MessageBox.Show("Database backup completed successfully..");
dcc.Close();
}
catch (Exception ex)
{ MessageBox.Show(ex.Message); }
}
你从哪里得到上面提到的错误?这就是您捕获的异常的消息吗?您是否已检查您的
| DataDirectory |
是否为包含.mdf文件的预期路径?您从哪里得到上述错误?这就是您捕获的异常的消息吗?您是否已检查您的| DataDirectory |
是否为包含.mdf文件的预期路径?