填充SQL表：错误-使用“ 0”参数调用“ ...”的异常

Question

我正在尝试使用带有PowerShell的API填充SQL表。

$conn = New-Object System.Data.SqlClient.SqlConnection("Data Source=SERVERNAME; Initial Catalog=DATABASENAME; Integrated Security=SSPI")  
$conn.open()
$cmd = $conn.CreateCommand()
$request = 'http://data.website.com/api/'
If ($JSONResult.success){
    $JSONResult.rates.PSObject.Properties | ForEach-Object {
        New-Object -Type PSObject -Property @{
            'date'          = $JSONResult.date
            'timestamp'     = $JSONResult.timestamp
            'base'          = $JSONResult.base
            'currency'      = $_.name
            'rate'          = $_.value
        }
    } | select date,timestamp,base,currency,rate|ft -auto
}
foreach($obj in $JSONResult) {
    $cmd.CommandText = "INSERT ExRate VALUES (@Date, @Timestamp, @Base, @Currency, @Rate)"
    $cmd.Parameters.Add("@Date",     $obj.date);
    $cmd.Parameters.Add("@Timestam", $obj.timestamp);
    $cmd.Parameters.Add("@Base",     $obj.base);
    $cmd.Parameters.Add("@Currency", $obj.currency);
    $cmd.Parameters.Add("@Rate",     $obj.rate);
    $cmd.ExecuteNonQuery()
    $cmd.Parameters.clear();
}
$conn.Close()           

这是我得到的错误：

  

使用“ 0”参数调用“ ExecuteNonQuery”的异常：“参数化查询'（@Date nvarchar（10），@ Timestamp int，@ Base nvarchar（3），@ Currency n'期望参数'@未提供货币”。

Answer 1

我相信这是您想要的，我将rates.psobject.Properties传递到了foreach：

$j = '{ "success": true, "timestamp": 1519296206, "base": "EUR", "date": "2018-06-20", "rates": { "AUD": 1.566015, "CAD": 1.560132, "CHF": 1.154727, "CNY": 7.827874, "GBP": 0.882047, "JPY": 132.360679, "USD": 1.23396 } } '      
$j2 = $J |convertfrom-json  
$results = $j2.rates.psobject.Properties | foreach {

    New-Object -Type PSObject -Property @{ 
    'date'          = $($j2.date) 
    'timestamp'     = $($j2.timestamp)
    'base'          = $($j2.base )
    'currency'      = $_.name 
    'rate'          = $_.value 
} 
}

结果如下：

date      : 2018-06-20
currency  : AUD
timestamp : 1519296206
rate      : 1.566015
base      : EUR

date      : 2018-06-20
currency  : CAD
timestamp : 1519296206
rate      : 1.560132
base      : EUR

date      : 2018-06-20
currency  : CHF
timestamp : 1519296206
rate      : 1.154727
base      : EUR

date      : 2018-06-20
currency  : CNY
timestamp : 1519296206
rate      : 7.827874
base      : EUR

date      : 2018-06-20
currency  : GBP
timestamp : 1519296206
rate      : 0.882047
base      : EUR

date      : 2018-06-20
currency  : JPY
timestamp : 1519296206
rate      : 132.360679
base      : EUR

date      : 2018-06-20
currency  : USD
timestamp : 1519296206
rate      : 1.23396
base      : EUR

其余代码

foreach($obj in $results) { 
    $cmd.CommandText = "INSERT ExRate VALUES (@Date, @Timestamp, @Base, @Currency, @Rate)" 
    $cmd.Parameters.Add("@Date",     $obj.date); 
    $cmd.Parameters.Add("@Timestamp", $obj.timestamp); 
    $cmd.Parameters.Add("@Base",     $obj.base); 
    $cmd.Parameters.Add("@Currency", $obj.currency); 
    $cmd.Parameters.Add("@Rate",     $obj.rate); 
    $cmd.ExecuteNonQuery() 
    $cmd.Parameters.clear(); 
    } 
    $conn.Close()