Question

从我的powershell脚本中，我正在尝试连接到Postgresql数据库。当我尝试导入Npgsql.dll时，它引发“找不到类型[System.Data.Npgsql.SqlCommand]：验证包含此类型的程序集是否已加载”

    Import-Module '.\Npgsql.dll'
    #Add-Type -Path '.\Npgsql.dll'
    $conn = New-Object System.Data.Npgsql.NpgsqlConnection
    $conn.ConnectionString = "Server=**;Port=**;User Id=**;Password=**;Database=**;"
    $cmdText = "select * from **"
    $conn.Open()
    $cmd = New-Object System.Data.Npgsql.SqlCommand($cmdText,$conn)
    $rdr = $cmd.ExecuteReader()

Answer 1

我认为您可能参加的课程是NpgsqlCommand

尝试更改

$cmd = New-Object System.Data.Npgsql.SqlCommand($cmdText,$conn)

收件人

$cmd = New-Object System.Data.Npgsql.NpgsqlSqlCommand($cmdText,$conn)

Answer 2

此代码适用于 Powershell 7.1.3 和 Npgsql 5.0.4

try
{    
    Add-type -path "Npgsql.dll"
}
catch { $_.Exception.LoaderExceptions }

$connection = New-Object Npgsql.NpgsqlConnection("User ID=postgres;Password=***;Server=localhost;Port=5432;Database=test;")
try {
    $connection.Open()
    $cmd = New-Object Npgsql.NpgsqlCommand('INSERT INTO public."Demo" ("A", "B", "C") VALUES (@A, @B, @C)', $connection)
    $cmd.Parameters.AddWithValue("A", "Some")
    $cmd.Parameters.AddWithValue("B", 123)
    $cmd.Parameters.AddWithValue("C", "value")
    $cmd.ExecuteNonQuery()
} finally {
    $connection.Close()
}

尝试在Powershell脚本中导入Npgsql.dll的模块，但未能将程序集包括到脚本中

2 个答案: