ProcessStartInfo.Verbs 属性
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
获取与 FileName 属性指定的文件类型关联的一组谓词。
public:
property cli::array <System::String ^> ^ Verbs { cli::array <System::String ^> ^ get(); };
public string[] Verbs { get; }
[System.ComponentModel.Browsable(false)]
public string[] Verbs { get; }
member this.Verbs : string[]
[<System.ComponentModel.Browsable(false)>]
member this.Verbs : string[]
Public ReadOnly Property Verbs As String()
属性值
String[]
系统可应用于 FileName 属性所指示文件的操作。
- 属性
示例
下面的代码示例显示所选文件名的已定义谓词。 如果用户选择定义的谓词之一,则该示例使用所选谓词和输入文件名启动一个新进程。
using System;
using System.ComponentModel;
using System.IO;
using System.Diagnostics;
using System.Windows.Forms;
class ProcessInformation
{
[STAThread]
static void Main()
{
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.InitialDirectory = "c:\\";
openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
openFileDialog1.FilterIndex = 2;
openFileDialog1.RestoreDirectory = true;
openFileDialog1.CheckFileExists = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
var fileName = openFileDialog1.FileName;
int i = 0;
var startInfo = new ProcessStartInfo(fileName);
// Display the possible verbs.
foreach (var verb in startInfo.Verbs)
{
Console.WriteLine($" {i++}. {verb}");
}
Console.Write("Select the index of the verb: ");
var indexInput = Console.ReadLine();
int index;
if (Int32.TryParse(indexInput, out index))
{
if (index < 0 || index >= i)
{
Console.WriteLine("Invalid index value.");
return;
}
var verbToUse = startInfo.Verbs[index];
startInfo.Verb = verbToUse;
if (verbToUse.ToLower().IndexOf("printto") >= 0)
{
// printto implies a specific printer. Ask for the network address.
// The address must be in the form \\server\printer.
// The printer address is passed as the Arguments property.
Console.Write("Enter the network address of the target printer: ");
var arguments = Console.ReadLine();
startInfo.Arguments = arguments;
}
try
{
using (var newProcess = new Process())
{
newProcess.StartInfo = startInfo;
newProcess.Start();
Console.WriteLine($"{newProcess.ProcessName} for file {fileName} " +
$"started successfully with verb '{startInfo.Verb}'!");
}
}
catch (Win32Exception e)
{
Console.WriteLine(" Win32Exception caught!");
Console.WriteLine($" Win32 error = {e.Message}");
}
catch (InvalidOperationException)
{
// Catch this exception if the process exits quickly,
// and the properties are not accessible.
Console.WriteLine($"Unable to start '{fileName}' with verb {verbToUse}");
}
}
}
else
{
{
Console.WriteLine("You did not enter a number.");
}
}
}
}
Imports System.ComponentModel
Imports System.IO
Imports System.Diagnostics
Imports System.Windows.Forms
Module ProcessInformation
Public Shared Sub Main()
Dim openFileDialog1 As New OpenFileDialog()
openFileDialog1.InitialDirectory = "c:\"
openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"
openFileDialog1.FilterIndex = 2
openFileDialog1.RestoreDirectory = True
openFileDialog1.CheckFileExists = True
If openFileDialog1.ShowDialog() = DialogResult.OK Then
Dim fileName = openFileDialog1.FileName
Dim i = 0
Dim startInfo = New ProcessStartInfo(fileName)
Dim verb As String
For Each verb In startInfo.Verbs
' Display the possible verbs.
Console.WriteLine($" {i}. {verb}")
i += 1
Next
Console.Write("Select the index of the verb: ")
Dim indexInput = Console.ReadLine()
Dim index As Integer
If Int32.TryParse(indexInput, index) Then
If index < 0 OrElse index >= i Then
Console.WriteLine("Invalid index value.")
Return
End If
Dim verbToUse = startInfo.Verbs(Convert.ToInt32(index))
startInfo.Verb = verbToUse
If verbToUse.ToLower().IndexOf("printto") >= 0 Then
' printto implies a specific printer. Ask for the network address.
' The address must be in the form \\server\printer.
Console.Write("Enter the network address of the target printer: ")
Dim arguments = Console.ReadLine()
startInfo.Arguments = arguments
End If
Try
Using newProcess As New Process
newProcess.StartInfo = startInfo
newProcess.Start()
Console.WriteLine($"{newProcess.ProcessName} for file {fileName} " +
$"started successfully with verb '{startInfo.Verb}'!")
End Using
Catch e As Win32Exception
Console.WriteLine(" Win32Exception caught!")
Console.WriteLine($" Win32 error = {e.Message}")
Catch e As InvalidOperationException
Console.WriteLine($"Unable to start '{fileName}' with verb {verbToUse}")
End Try
Else
Console.WriteLine("You did not enter a number.")
End If
End If
End Sub
End Module
注解
属性 Verbs 使你能够确定可与 属性指定的文件一起使用的 FileName 谓词。 可以将 属性设置为 Verb 集中任何谓词的值。 动词的示例包括“Edit”、“Open”、“OpenAsReadOnly”、“Print”和“Printto”。
请注意,生成的谓词列表可能不包含所有可能的值,例如,根据设计,“New”未添加到列表中,并且不会始终检测到其他可能的谓词,具体取决于系统设置。
使用 Verbs 属性时,在设置 属性的值 FileName 时必须包含文件扩展名。 文件扩展名确定可能的谓词集。