通过

IVCCollection.Item 方法

  • 项目

选择该集合中的项目。

命名空间：  Microsoft.VisualStudio.VCProjectEngine
程序集：  Microsoft.VisualStudio.VCProjectEngine（在 Microsoft.VisualStudio.VCProjectEngine.dll 中）

语法

声明
Function Item ( _
    Index As Object _
) As Object

Object Item(
    Object Index
)

Object^ Item(
    Object^ Index
)

abstract Item : 
        Index:Object -> Object 

function Item(
    Index : Object
) : Object

参数

  • Index
    类型：System.Object
    表示项的索引的集合中的对象。

返回值

类型：System.Object
集合中的一项。

备注

可以提供要么是索引到集合中的项的基于 1 的数字，也可以提供表示一个项目的名称在集合的一个带引号的字符串。

示例

下面的示例演示如何使用 EnablePREfast 和 AdditionalOptions 属性设置 /analyze:WX- 开关。(需要两个属性。) 指定 /analyze:WX- 意味着代码分析警告不被视为错误，则编译 /WX时。有关更多信息，请参见 /analyze（代码分析）。

如 如何：编译和运行自动化对象模型代码示例所述，若要运行此示例中，输入并运行此示例。然后，在 Visual Studio新实例，加载一个 Visual C++ 项目并使用外接程序管理器激活外接程序。

' Add reference to Microsoft.VisualStudio.VCProjectEngine.
Imports System
Imports EnvDTE
Imports EnvDTE80
Imports System.Diagnostics
Imports Microsoft.VisualStudio.VCProjectEngine
Imports System.Text

Sub EnablePREfastExample(ByVal dte As DTE2)
    Dim prj As VCProject
    Dim cfgs, tools As IVCCollection
    Dim cfg As VCConfiguration
    Dim tool As VCCLCompilerTool
    Dim sb As New StringBuilder

    prj = CType(dte.Solution.Projects.Item(1).Object, _
      Microsoft.VisualStudio.VCProjectEngine.VCProject)
    cfgs = CType(prj.Configurations, _
      Microsoft.VisualStudio.VCProjectEngine.IVCCollection)
    cfg = CType(cfgs.Item(1), _
      Microsoft.VisualStudio.VCProjectEngine.VCConfiguration)
    tool = CType(cfg.Tools("VCCLCompilerTool"), _
      Microsoft.VisualStudio.VCProjectEngine.VCCLCompilerTool)

    sb.Length = 0
    sb.Append("Current project PREfast setting: " _
      & tool.EnablePREfast & Environment.NewLine)
    sb.Append("Flag: " & tool.AdditionalOptions)
    MsgBox(sb.ToString)

    ' Toggle PREfast setting.
    If Not (tool.EnablePREfast = True) Then
        ' PREfast is not enabled. Turn it and the WX- flag on.
        tool.EnablePREfast = True
        tool.AdditionalOptions = "/analyze:WX-"
    Else
        ' Toggle the opposite.
        tool.EnablePREfast = False
        tool.AdditionalOptions = "/analyze:WX"
    End If
    sb.Length = 0
    sb.Append("New project PREfast setting: " _
      & tool.EnablePREfast & Environment.NewLine)
    sb.Append("Flag: " & tool.AdditionalOptions)
    MsgBox(sb.ToString)
End Sub

// Add references to Microsoft.VisualStudio.VCProjectEngine and 
// System.Windows.Forms.
using System;
using Extensibility;
using EnvDTE;
using EnvDTE80;
using Microsoft.VisualStudio.VCProjectEngine;
using System.Text;
using System.Windows.Forms;

public void EnablePREfastExample(DTE2 dte)
{
    try
    {
        VCProject prj;
        IVCCollection cfgs, tools;
        VCConfiguration cfg;
        VCCLCompilerTool tool;
        StringBuilder sb = new StringBuilder();

        prj = (Microsoft.VisualStudio.VCProjectEngine.VCProject)
          dte.Solution.Projects.Item(1).Object;
        cfgs = 
          (Microsoft.VisualStudio.VCProjectEngine.IVCCollection)
          prj.Configurations;
        cfg = 
          (Microsoft.VisualStudio.VCProjectEngine.VCConfiguration)
           cfgs.Item(1);
        tools = 
          (Microsoft.VisualStudio.VCProjectEngine.IVCCollection)
          cfg.Tools;
        tool = 
          (Microsoft.VisualStudio.VCProjectEngine.VCCLCompilerTool)
          tools.Item("VCCLCompilerTool");
                                
        sb.Length = 0;
        sb.Append("Current project PREfast setting: " +
          tool.EnablePREfast + Environment.NewLine);
        sb.Append("Flag: " + tool.AdditionalOptions);
        MessageBox.Show(sb.ToString());

        // Toggle PREfast setting.
        if (!(tool.EnablePREfast == true))
        {
            // PREfast is not enabled. Turn it and the WX- flag on.
            tool.EnablePREfast = true;
            tool.AdditionalOptions = "/analyze:WX-";
        }
        else
        {
            // Toggle the opposite.
            tool.EnablePREfast = false;
            tool.AdditionalOptions = "/analyze:WX";
        }
        sb.Length = 0;
        sb.Append("New project PREfast setting: " +
          tool.EnablePREfast + Environment.NewLine);
        sb.Append("Flag: " + tool.AdditionalOptions);
        MessageBox.Show(sb.ToString());
    }
    catch (System.Exception errmsg)
    {
        MessageBox.Show("ERROR! " + errmsg.Message);
    }
}

.NET Framework 安全性

请参见

参考

IVCCollection 接口

Microsoft.VisualStudio.VCProjectEngine 命名空间