Question

$computername = 'RSERV1234'    
$computername.Substring(5,4) returns '1234' as expected    
Get-ADOrganizationalUnit -Filter {Name -like $computername.Substring(5,4)}

返回：

Property 'Substring' not found in object of type: 'System.String'

请帮忙！

Answer 1

来自about_ActiveDirecory_Filter：

Filter Syntax
  The following syntax descriptions use Backus-Naur form to show the
  PowerShell Expression Language for the Filter parameter.

    <filter>  ::= "{" <FilterComponentList> "}"

    <FilterComponentList> ::= <FilterComponent> |
        <FilterComponent> <JoinOperator> <FilterComponent> |
        <NotOperator>  <FilterComponent>

    <FilterComponent> ::= <attr> <FilterOperator> <value> |
        "(" <FilterComponent> ")"

    <FilterOperator> ::= "-eq" | "-le" | "-ge" | "-ne" | "-lt" | "-gt" |
        "-approx" | "-bor" | "-band" | "-recursivematch" | "-like" |
        "-notlike"

    <JoinOperator> ::= "-and" | "-or"

    <NotOperator> ::= "-not"

    <attr> ::= <PropertyName> | <LDAPDisplayName of the attribute>

    <value>::= < this value will be compared to the object data for
        attribute <ATTR> using the specified filter operator

Filter参数将类似PowerShell的表达式转换为LDAP过滤器，但不支持任何任意PowerShell语句，只支持一组特定的比较操作，其中属性名称为左操作数和比较价值在右边。

事先致电Substring()：

$substr = $computername.Substring(5,4)

Get-ADOrganizationalUnit -Filter {Name -like "$substr"}

找不到powershell子字符串方法

1 个答案: