无法加载 DLL 'sni.dll' 或其依赖项之一：找不到指定的模块答案

【问题标题】：Unable to load DLL 'sni.dll' or one of its dependencies: The specified module could not be found无法加载 DLL 'sni.dll' 或其依赖项之一：找不到指定的模块
【发布时间】：2021-07-15 10:48:46
【问题描述】：

我在自托管代理上运行 UI 测试，尝试恢复数据库时收到以下错误消息：

[ERROR] The type initializer for 'System.Data.SqlClient.TdsParser' threw an exception. -> The type initializer for 'System.Data.SqlClient.SNILoadHandle' threw an exception. -> Unable to load DLL 'sni.dll' or one of its dependencies: The specified module could not be found. (Exception from HRESULT: 0x8007007E)

这些是我的依赖

    <PackageReference Include="Appium.WebDriver" Version="4.3.1" />
    <PackageReference Include="Microsoft.Data.SqlClient" Version="3.0.0" />
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0" />
    <PackageReference Include="Microsoft.VisualStudio.TestPlatform" Version="14.0.0" />
    <PackageReference Include="SpecFlow.Plus.LivingDocPlugin" Version="3.9.5" />
    <PackageReference Include="SpecRun.SpecFlow" Version="3.9.7" />
    <PackageReference Include="FluentAssertions" Version="5.10.3" />
    <PackageReference Include="System.Data.SqlClient" Version="4.8.2" />

我的 buildpipline 工作正常，看起来像这样：

当在代理机器上运行 dotnet --info 时，我得到以下输出

.NET SDK (reflecting any global.json):
 Version:   5.0.301
 Commit:    ef17233f86

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.17763
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\5.0.301\

Host (useful for support):
  Version: 5.0.7
  Commit:  556582d964

.NET SDKs installed:
  5.0.301 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.All 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.16 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.16 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.1.16 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.7 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET runtimes or SDKs:
  https://aka.ms/dotnet-download

这是我运行测试的发布管道

【问题讨论】：

标签： c# .net azure-devops

【解决方案1】：

将 Microsoft.Data.SqlClient.Sni.xx.dll 复制到 bin 文件夹

【讨论】：

重命名为 sni.dll

【解决方案2】：

如果您使用的是 Azure Piplines，我建议您使用 powershell 任务来恢复您的数据库。我是这样做的：

首先使用以下命令在您的代理机器上安装 SQL Server 模块：

Install-Module -Name SqlServer

向你的管道添加一个 Powershell 任务并选择内联，然后你可以像这样运行你的 SQL 语句：

$sql = @"
USE [master]
ALTER DATABASE[TEST_DATABASE] SET SINGLE_USER WITH ROLLBACK IMMEDIATE
RESTORE DATABASE[TEST_DATABASE] FROM DISK = 'D:\Public\TEST_DATABASE.bak' WITH FILE = 1, NOUNLOAD, REPLACE, STATS = 5
ALTER DATABASE[TEST_DATABASE] SET MULTI_USER
"@

Invoke-Sqlcmd -Query $sql -ServerInstance "SERV\TESTING" –Username "dev" –Password "12345678"

【讨论】：