[英]Backup SQL Server Database with progress
有人知道如何用C#備份SQL Server 2005/2008數據庫並獲得數據庫備份進度嗎?
這是一個純粹的ADO.NET解決方案,如果你在目標機器上安裝SMO / SQLDMO時遇到困難(這是后面的痛苦,如果可以,最好避免)。
public void BackupDatabase(SqlConnection con, string databaseName, string backupName, string backupDescription, string backupFilename) {
con.FireInfoMessageEventOnUserErrors = true;
con.InfoMessage += OnInfoMessage;
con.Open();
using(var cmd = new SqlCommand(string.Format(
"backup database {0} to disk = {1} with description = {2}, name = {3}, stats = 1",
QuoteIdentifier(databaseName),
QuoteString(backupFilename),
QuoteString(backupDescription),
QuoteString(backupName)), con)) {
cmd.ExecuteNonQuery();
}
con.Close();
con.InfoMessage -= OnInfoMessage;
con.FireInfoMessageEventOnUserErrors = false;
}
private void OnInfoMessage(object sender, SqlInfoMessageEventArgs e) {
foreach(SqlError info in e.Errors) {
if(info.Class > 10) {
// TODO: treat this as a genuine error
} else {
// TODO: treat this as a progress message
}
}
}
private string QuoteIdentifier(string name) {
return "[" + name.Replace("]", "]]") + "]";
}
private string QuoteString(string text) {
return "'" + text.Replace("'", "''") + "'";
}
stats = 1
子句告訴SQL Server以指定的百分比間隔(在這種情況下為1%)發出嚴重性為0的消息。 FireInfoMessageEventOnUserErrors
屬性和InfoMessage
事件確保C#代碼在執行期間而不是僅在結束時捕獲這些消息。
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