Question

我有一个cboBox，我想用脚本中的表加载。

$dtNetworks = New-Object System.Data.DataTable
[void]$dtNetworks.Columns.Add("Environment")
[void]$dtNetworks.Columns.Add("Name")
[void]$dtNetworks.Columns.Add("Subnet")
[void]$dtNetworks.Rows.Add("Dev","Inside","10.0.00.0/24")
[void]$dtNetworks.Rows.Add("Dev","DMZ","10.0.0.0/24")
[void]$dtNetworks.Rows.Add("QA","Inside","10.1.0.0/24")
[void]$dtNetworks.Rows.Add("QA","DMZ","10.1.0.0/24")
[void]$dtNetworks.Rows.Add("Prod","Inside","10.2.0.0/24")
[void]$dtNetworks.Rows.Add("Prod","DMZ","10.2.0.0/24")

$WPFtxt_dNetwork.DisplayMemberPath = "Name"
$WPFtxt_dNetwork.SelectedValuePath = "Subnet"
#$WPFtxt_dNetwork.ItemsSource = $dtNetworks.DefaultView
$WPFtxt_dNetwork.ItemsSource = $dtNetworks.Select("Environment = 'Dev'")
$WPFtxt_dNetwork.SelectedIndex = 1
$form.Activate()

$ dtNetworks.DefaultView使用$ dtNetworks中的所有值工作并填充cboBox。它还返回一个System.Data.DataRowView类型。

select语句对它自己起作用并只返回Dev值，但它返回一个System.Data.DataRow类型。填写表单时，cboBox中没有条目。

如何将$ dtNetworks的内容过滤到DataRowView？

Answer 1

不使用.Select()方法定义源，而是将源保留为DefaultView，并将过滤器应用于该视图。

$dtNetworks = New-Object System.Data.DataTable
[void]$dtNetworks.Columns.Add("Environment")
[void]$dtNetworks.Columns.Add("Name")
[void]$dtNetworks.Columns.Add("Subnet")
[void]$dtNetworks.Rows.Add("Dev","Inside","10.0.00.0/24")
[void]$dtNetworks.Rows.Add("Dev","DMZ","10.0.0.0/24")
[void]$dtNetworks.Rows.Add("QA","Inside","10.1.0.0/24")
[void]$dtNetworks.Rows.Add("QA","DMZ","10.1.0.0/24")
[void]$dtNetworks.Rows.Add("Prod","Inside","10.2.0.0/24")
[void]$dtNetworks.Rows.Add("Prod","DMZ","10.2.0.0/24")

$WPFtxt_dNetwork.DisplayMemberPath = "Name"
$WPFtxt_dNetwork.SelectedValuePath = "Subnet"
$dtNetworks.DefaultView.Filter = "Environment = 'Dev'"
$WPFtxt_dNetwork.ItemsSource = $dtNetworks.DefaultView
$WPFtxt_dNetwork.SelectedIndex = 1
$form.Activate()

使用DataTable.Select加载cboBox

1 个答案: