12

我只想从 PowerShell调用Microsoft.Data.Schema.ScriptDom.Sql.Sql100ScriptGenerator的GenerateScript方法。

#C

public void GenerateScript(
    IScriptFragment scriptFragment,
    out string script
)

我找到了这个，但我没有让它工作

$sg = new-object  Microsoft.Data.Schema.ScriptDom.Sql.Sql100ScriptGenerator

$sql = 'select * from PowerShell'

$out = ''
$sg.GenerateScript($sql, [ref] $out)

$out

这给了

Cannot find an overload for "GenerateScript" and the argument count: "2".
At line:6 char:19
+ $sg.GenerateScript <<<< ($sql, [ref] $out)
    + CategoryInfo          : NotSpecified: (:) [], MethodException
    + FullyQualifiedErrorId : MethodCountCouldNotFindBest

编辑：

当前版本是

$sql = 'select * from PowerShell'

$sr = new-Object System.IO.StringReader($sql)

$sg =     new-object Microsoft.Data.Schema.ScriptDom.Sql.Sql100ScriptGenerator
$parser = new-object Microsoft.Data.Schema.ScriptDom.Sql.TSQL100parser($true)

$errors = ''
$fragment = $parser.Parse($sr,([ref]$errors))

$out = ''
$sg.GenerateScript($fragment,([ref][string]$out))

$out

但是我遇到了一个错误

$fragment = $parser.Parse($sr,([ref]$errors))



Cannot find an overload for "Parse" and the argument count: "2".
At line:11 char:26
+ $fragment = $parser.Parse <<<< ($sr,([ref]$errors))
    + CategoryInfo          : NotSpecified: (:) [], MethodException
    + FullyQualifiedErrorId : MethodCountCouldNotFindBest

我正在尝试转换

    IList<ParseError> errors;

    using (StringReader sr = new StringReader(inputScript))
    {
        fragment = parser.Parse(sr, out errors);
    }

编辑：

好的，这有效：

$sql = @'
select * from PowerShell -- a comment
where psRefnr = 1
'@
$options = new-object Microsoft.Data.Schema.ScriptDom.Sql.SqlScriptGeneratorOptions

$sr = new-Object System.IO.StringReader($sql)

$sg =     new-object Microsoft.Data.Schema.ScriptDom.Sql.Sql100ScriptGenerator($options)
$parser = new-object Microsoft.Data.Schema.ScriptDom.Sql.TSQL100parser($true)

$errors = $null
$fragment = $parser.Parse($sr,([ref]$errors))

$out = $null
$sg.GenerateScript($fragment,([ref]$out))

$out

并生成（它按预期删除评论）

SELECT *
FROM   PowerShell
WHERE  psRefnr = 1;
4

2 回答 2

3

我相信你的问题在于你的第一个参数，它应该是一个 IScriptFragment。您正在传递一个字符串。

You would need to pass something that derives from TSqlFragment. Using something like the TSql100Parser.ParseStatementList method, you will get a list of fragments.

EDIT: This blog post has a similar issue to your second error.

于 2011-03-11T18:44:43.737 回答
1

不完全确定这如何与 Powershell 一起使用，但在普通 C# 中，您需要使用关键字“out”而不是“ref”来调用 out 参数。抱歉，如果这不正常，但认为它可能会有所帮助。

于 2011-03-11T18:15:07.073 回答