如何在 smo 中无一例外地使用 smo 恢复您的 SQL 服务器数据库

Question

为什么在 WPF 中使用 SMO 恢复 SQL 服务器数据库时出现异常？

这是我的代码：

ServerConnection conRestore = new ServerConnection(LaServerInstance);

Server ServerRestore = new Server(conRestore);
Restore RestoreObject = new Restore();

RestoreObject.Action = RestoreActionType.Database;
RestoreObject.Database = "Mainwaterphantom";

BackupDeviceItem source = new BackupDeviceItem(open.FileName, DeviceType.File);

RestoreObject.Devices.Add(source);
RestoreObject.ReplaceDatabase = true;

RestoreObject.SqlRestore(ServerRestore);

MessageBox.Show("Successful Restore");

我得到这个异常：

An exception of type Microsoft.SqlServer.Management.Smo.FailedOperationException occurred in Microsoft.SqlServer.SmoExtended.dll but was not handled in user code. The innerexception give me this: Restore failed to server 'Data source=L1038\parvaresh;Initial catalog=Mainwaterphantom;integrated security=true

Answer 1

在使用 SMO 时，当出现异常时，通常最里面的异常包含您需要的信息。

为了收集所有异常文本，您必须遍历异常层次结构。

这可以通过一个小的扩展来实现，如下面的代码片段所示。

using System;
using System.Collections.Generic;

namespace Converter.Extension
{
    /// <summary>
    /// When working with SMO, when an exception arises, 
    /// usually, the most inner one contains the information that you need. 
    /// In order to collect all exception text, you have to travel through the exception hierarchy.
    /// </summary>
    public static class ExceptionExtensionMethods
    {

        public static IEnumerable<TSource> CollectThemAll<TSource>(
        this TSource source,
        Func<TSource, TSource> nextItem,
        Func<TSource, bool> canContinue)
        {
            for (var current = source; canContinue(current); current = nextItem(current))
            {
                yield return current;
            }
        }

        public static IEnumerable<TSource> CollectThemAll<TSource>(
            this TSource source,
            Func<TSource, TSource> nextItem)
            where TSource : class
        {
            return CollectThemAll(source, nextItem, s => s != null);
        }
    }

}

然后，将代码放入 try-catch 块并在 catch 块中收集所有文本，如下所示

catch (Exception ex)
      {


              errMessage = string.Join(Environment.NewLine + "\t", ex.CollectThemAll(ex1 => ex1.InnerException)
                    .Select(ex1 => ex1.Message));
Console.WriteLine(errMessage);
}

Internet 上有一个资源描述了如何使用 SMO 完成 backup/restore 操作。

查看 Programming SQL Server with SQL Server Management Objects Framework

如何在 smo 中无一例外地使用 smo 恢复您的 SQL 服务器数据库

How restore your SQL Server database with smo without exception in smo

c#

sql-server

wpf

smo