c# - 使用进度备份 SQL Server 数据库

Question

有谁知道如何用C#备份SQL Server 2005/2008数据库并获取数据库备份进度？

Answer 1

这是一个纯粹的 ADO.NET 解决方案，如果您在目标机器上安装 SMO/SQLDMO 有困难(这是一个背后的痛苦，如果可以的话最好避免)。

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 子句告诉 SQL Server 以指定的百分比间隔(在本例中为 1%)发出严重性为 0 的消息。 FireInfoMessageEventOnUserErrors 属性和 InfoMessage 事件确保 C# 代码在执行期间捕获这些消息，而不仅仅是在结束时。