CommandLineBuilder.AppendFileNameIfNotNull Method (ITaskItem)

Appends the command line with the file name of the specified ITaskItem object.

MSBuild is now included in Visual Studio instead of the .NET Framework. You can use MSBuild 12.0 side-by-side with versions previously deployed with the .NET Framework.For more information, see What's New in MSBuild 12.0.

Namespace:  Microsoft.Build.Utilities
Assembly:  Microsoft.Build.Utilities.Core (in Microsoft.Build.Utilities.Core.dll)

Syntax

'Declaration
Public Sub AppendFileNameIfNotNull ( _
    fileItem As ITaskItem _
)
public void AppendFileNameIfNotNull(
    ITaskItem fileItem
)
public:
void AppendFileNameIfNotNull(
    ITaskItem^ fileItem
)
member AppendFileNameIfNotNull : 
        fileItem:ITaskItem -> unit
public function AppendFileNameIfNotNull(
    fileItem : ITaskItem
)

Parameters

  • fileItem
    Type: Microsoft.Build.Framework.ITaskItem

    The task item specification to append to the command line. If it is nulla null reference (Nothing in Visual Basic), then this method has no effect.

Remarks

This method appends the command line with a task item specification, and surrounds task item specification with quotations marks as necessary.

If the command line is not empty, then this method also appends the command line with a space, before the task item specification.

Examples

The following example creates a ToolTask that runs Ilasm.exe. The CommandLineBuilder, ToolLocationHelper, and TaskLoggingHelper classes are used to generate the information needed to run the task.

Imports System
Imports System.Collections
Imports System.Text
Imports Microsoft.Build.Utilities
Imports Microsoft.Build.Framework

Namespace MSBuildTasks

    ''' <summary> 
    ''' A very simple and incomplete ToolTask to wrap the ILASM.EXE tool. 
    ''' </summary> 
    Public Class ILAsm
        Inherits ToolTask

        ''' <summary> 
        ''' Parameter bag. 
        ''' </summary> 
        Protected Friend ReadOnly Property Bag() As Hashtable
            Get 
                Return propertyBag
            End Get 
        End Property 

        Private propertyBag As New Hashtable()

        ''' <summary> 
        ''' The Source file that is to be compled (.il) 
        ''' </summary> 
        Public Property [Source]() As ITaskItem
            Get 
                Return Bag("Source")
            End Get 
            Set(ByVal value As ITaskItem)
                Bag("Source") = value
            End Set 
        End Property 

        ''' <summary> 
        ''' Either EXE or DLL indicating the assembly type to be generated 
        ''' </summary> 
        Public Property TargetType() As String 
            Get 
                Return Bag("TargetType")
            End Get 
            Set(ByVal value As String)
                Bag("TargetType") = value
            End Set 
        End Property '

        Protected Overrides ReadOnly Property ToolName() As String 
            Get 
                Return "ILAsm.exe" 
            End Get 
        End Property 

        ''' <summary> 
        ''' Use ToolLocationHelper to find ILASM.EXE in the Framework directory 
        ''' </summary> 
        Protected Overrides Function GenerateFullPathToTool() As String 
            ' Ask ToolLocationHelper to find ILASM.EXE - it will look in the latest framework directory available 
            Return ToolLocationHelper.GetPathToDotNetFrameworkFile(ToolName, TargetDotNetFrameworkVersion.VersionLatest)
        End Function 

        ''' <summary> 
        ''' Construct the command line from the task properties by using the CommandLineBuilder 
        ''' </summary> 
        Protected Overrides Function GenerateCommandLineCommands() As String 
            Dim builder As New CommandLineBuilder()

            ' We don't need the tool's logo information shown
            builder.AppendSwitch("/nologo")

            Dim targetType As String = Bag("TargetType")
            ' Be explicit with our switches 
            If Not (targetType Is Nothing) Then 
                If [String].Compare(targetType, "DLL", True) = 0 Then
                    builder.AppendSwitch("/DLL")
                ElseIf [String].Compare(targetType, "EXE", True) = 0 Then
                    builder.AppendSwitch("/EXE")
                Else
                    Log.LogWarning("Invalid TargetType (valid values are DLL and EXE) specified: {0}", targetType)
                End If 
            End If 
            ' Add the filename that we want the tool to process
            builder.AppendFileNameIfNotNull(Bag("Source"))

            ' Log a High importance message stating the file that we are assembling
            Log.LogMessage(MessageImportance.High, "Assembling {0}", Bag("Source"))

            ' We have all of our switches added, return the commandline as a string 
            Return builder.ToString()
        End Function 
    End Class 
End Namespace
using System;
using System.Collections;
using System.Text;
using Microsoft.Build.Utilities;
using Microsoft.Build.Framework;

namespace MSBuildTasks
{
    /// <summary> 
    /// A very simple and incomplete ToolTask to wrap the ILASM.EXE tool. 
    /// </summary> 
    public class ILAsm : ToolTask
    {
        #region Member Data
        /// <summary> 
        /// Gets the collection of parameters used by the task class. 
        /// </summary> 
        /// <value>Parameter bag.</value> 
        protected internal Hashtable Bag
        {
            get
            {
                return bag;
            }
        }

        private Hashtable bag = new Hashtable();
        #endregion

        #region ILAsm Task Properties
        /// <summary> 
        /// The Source file that is to be compled (.il) 
        /// </summary> 
        public ITaskItem Source
        {
            get { return Bag["Source"] as ITaskItem; }
            set { Bag["Source"] = value; }
        }
        /// <summary> 
        /// Either EXE or DLL indicating the assembly type to be generated 
        /// </summary> 
        public string TargetType
        {
            get { return Bag["TargetType"] as string; }
            set { Bag["TargetType"] = value; }
        }
        #endregion

        #region ToolTask Members
        protected override string ToolName
        {
            get { return "ILAsm.exe"; }
        }

        /// <summary> 
        /// Use ToolLocationHelper to find ILASM.EXE in the Framework directory 
        /// </summary> 
        /// <returns></returns> 
        protected override string GenerateFullPathToTool()
        {
            // Ask ToolLocationHelper to find ILASM.EXE - it will look in the latest framework directory available 
            return ToolLocationHelper.GetPathToDotNetFrameworkFile(ToolName, TargetDotNetFrameworkVersion.VersionLatest);
        }
        #endregion

        #region ILAsm Task Members
        /// <summary> 
        /// Construct the command line from the task properties by using the CommandLineBuilder 
        /// </summary> 
        /// <returns></returns> 
        protected override string GenerateCommandLineCommands()
        {
            CommandLineBuilder builder = new CommandLineBuilder();

            // We don't need the tool's logo information shown
            builder.AppendSwitch("/nologo");

            string targetType = Bag["TargetType"] as string;
            // Be explicit with our switches 
            if (targetType != null)
            {
                if (String.Compare(targetType, "DLL", true) == 0)
                {
                    builder.AppendSwitch("/DLL");
                }
                else if (String.Compare(targetType, "EXE", true) == 0)
                {
                    builder.AppendSwitch("/EXE");
                }
                else
                {
                    Log.LogWarning("Invalid TargetType (valid values are DLL and EXE) specified: {0}", targetType);
                }
            }

            // Add the filename that we want the tool to process
            builder.AppendFileNameIfNotNull(Bag["Source"] as ITaskItem);

            // Log a High importance message stating the file that we are assembling
            Log.LogMessage(MessageImportance.High, "Assembling {0}", Bag["Source"]);

            // We have all of our switches added, return the commandline as a string 
            return builder.ToString();
        }
        #endregion
    }
}

.NET Framework Security

See Also

Reference

CommandLineBuilder Class

AppendFileNameIfNotNull Overload

Microsoft.Build.Utilities Namespace