如何循环数据记录器并在PowerShell中创建DataTable

Question

首先让我感谢那些回答了我以前的问题的人。你们真棒！

这是我的问题： 我喜欢查询我的sql服务器存储过程并返回一个datareader。不过，我想创建一个表。我将使用该表使用新的Powershell OpenXML命令行开关加载Excel。当我尝试构建DataTable时，代码失败。我不认为我正确地调用了新对象“System.Object []”。以下是我走到这一步：

$sqlConnection = new-object System.Data.SqlClient.SqlConnection "server=localhost;database=Demo;Integrated Security=sspi" 
$sqlConnection.Open() 

#Create a command object 
$sqlCommand = $sqlConnection.CreateCommand() 
$sqlCommand.CommandText = "EXEC Demo.usp_GetTableValueParameter_Data" 

#Execute the Command 
$sqlReader = $sqlCommand.ExecuteReader() 

#Parse the records 

$sqlReader | &{ begin{$values = new-object "System.Object[]" $sqlReader["Name"], $sqlReader["Level_Desc"], $sqlReader["Level"]} process {$_.GetValues($values); $datatable.Rows.Add($values)}} 

##$datatable | format-table -autosize 

# Close the database connection 
$sqlConnection.Close() 

#STARTING OPENXML PROCESS 
#---------------------------- 
$xlsFile = "C:\Temp\Data.xlsx" 
$datatable | Export-OpenXmlSpreadSheet -OutputPath $xlsFile -InitialRow 3 

Answer 1

我不知道如何在PowerShell中，但做到这一点.NET你做这样的：

DataTable dt = new DataTable(); 
dt.Load(yourSqlReader); 

Answer 2

翻译Mladen's answer到PowerShell是相当直截了当：

$sqlConnection = new-object System.Data.SqlClient.SqlConnection "server=localhost;database=Demo;Integrated Security=sspi" 
$sqlConnection.Open() 

#Create a command object 
$sqlCommand = $sqlConnection.CreateCommand() 
$sqlCommand.CommandText = "EXEC Demo.usp_GetTableValueParameter_Data" 

#Execute the Command 
$sqlReader = $sqlCommand.ExecuteReader() 

$Datatable = New-Object System.Data.DataTable 
$DataTable.Load($SqlReader) 

# Close the database connection 
$sqlConnection.Close() 

#STARTING OPENXML PROCESS 
#---------------------------- 
$xlsFile = "C:\Temp\Data.xlsx" 
$datatable | Export-OpenXmlSpreadSheet -OutputPath $xlsFile -InitialRow 3 

但是，如果你只需要一个数据表背，你不需要调用ExecuteReaer方法的命令，你可以创建一个DataAdapter并用它来填补数据表：

$sqlConnection = new-object System.Data.SqlClient.SqlConnection "server=localhost;database=Demo;Integrated Security=sspi" 
$sqlConnection.Open() 

#Create a command object 
$sqlCommand = $sqlConnection.CreateCommand() 
$sqlCommand.CommandText = "EXEC Demo.usp_GetTableValueParameter_Data" 

$adapter = New-Object System.Data.SqlClient.SqlDataAdapter $sqlcommand 
$dataset = New-Object System.Data.DataSet 

$adapter.Fill($dataSet) | out-null 

# Close the database connection 
$sqlConnection.Close() 

$datatable = $dataset.Tables[0] 

#STARTING OPENXML PROCESS 
#---------------------------- 
$xlsFile = "C:\Temp\Data.xlsx" 
$datatable | Export-OpenXmlSpreadSheet -OutputPath $xlsFile -InitialRow 3