Question

我将使用我的winforms应用程序通过网络复制一个大文件，我需要显示某种进度条。我没想到自己复制例程，而是认为简单地显示内置文件复制对话框可能会更好。

我还需要“复制完成”和“复制失败”通知。

我需要这个在Windows XP，Vista和7上工作。有没有办法打电话来从我的c＃代码中使用这个功能？

Answer 1

答案取自：here

Windows Vista确实包含一个新的复制引擎，可以完全支持您要执行的操作。但是，以前存在的功能可能可以满足您的需求。例如，如果要复制，移动，重命名或删除单个文件或目录，则可以利用已由VisualBasic®运行时包装的SHFileOperation（从shell32.dll公开）。如果您使用的是Visual Basic 2005，则只需使用My命名空间中的功能，例如：
 My.Computer.FileSystem.CopyDirectory(
   sourcePath, destinationPath, UIOption.AllDialogs)
在C＃中完成相同的工作只涉及更多工作，添加对Microsoft.VisualBasic.dll的引用（来自Microsoft®.NETFramework安装目录）并使用如下代码：
using Microsoft.VisualBasic.FileIO;
...
FileSystem.CopyDirectory(
    sourcePath, destinationPath, UIOption.AllDialogs);
运行时，如果您从Windows资源管理器执行相同的文件操作，则会产生相同的进度UI。事实上，在Windows Vista上运行时，您会自动获得新的Window Vista进度UI，如图1所示。

Answer 2

我知道这是一个旧线程，但是我面临着类似的要求，最后这是我使用的代码，也许它可以帮助别人。功劳属于here

using System;
using System.Runtime.InteropServices;
using System.Text;

namespace Pietschsoft
{
    public class NativeProgressDialog
    {
        private IntPtr parentHandle;

        private Win32IProgressDialog pd = null;

        private string title = string.Empty;
        private string cancelMessage = string.Empty;
        private string line1 = string.Empty;
        private string line2 = string.Empty;
        private string line3 = string.Empty;
        private uint value = 0;
        private uint maximum = 100;

        public string Title
        {
            get
            {
                return this.title;
            }
            set
            {
                this.title = value;
                if (pd != null)
                {
                    pd.SetTitle(this.title);
                }
            }
        }

        public string CancelMessage
        {
            get
            {
                return this.cancelMessage;
            }
            set
            {
                this.cancelMessage = value;
                if (pd != null)
                {
                    pd.SetCancelMsg(this.cancelMessage, null);
                }
            }
        }

        public string Line1
        {
            get
            {
                return this.line1;
            }
            set
            {
                this.line1 = value;
                if (pd != null)
                {
                    pd.SetLine(1, this.line1, false, IntPtr.Zero);
                }
            }
        }

        public string Line2
        {
            get
            {
                return this.line2;
            }
            set
            {
                this.line2 = value;
                if (pd != null)
                {
                    pd.SetLine(2, this.line2, false, IntPtr.Zero);
                }
            }
        }

        public string Line3
        {
            get
            {
                return this.line3;
            }
            set
            {
                this.line3 = value;
                if (pd != null)
                {
                    pd.SetLine(3, this.line3, false, IntPtr.Zero);
                }
            }
        }

        public uint Value
        {
            get
            {
                return this.value;
            }
            set
            {
                this.value = value;
                if (pd != null)
                {
                    pd.SetProgress(this.value, this.maximum);
                }
            }
        }

        public uint Maximum
        {
            get
            {
                return this.maximum;
            }
            set
            {
                this.maximum = value;
                if (pd != null)
                {
                    pd.SetProgress(this.value, this.maximum);
                }
            }
        }
        public bool HasUserCancelled
        {
            get
            {
                if (pd != null)
                {
                    return pd.HasUserCancelled();
                }
                else
                    return false;
            }
        }

        public NativeProgressDialog(IntPtr parentHandle)
        {
            this.parentHandle = parentHandle;
        }

        public void ShowDialog(params PROGDLG[] flags)
        {
            if (pd == null)
            {
                pd = (Win32IProgressDialog)new Win32ProgressDialog();

                pd.SetTitle(this.title);
                pd.SetCancelMsg(this.cancelMessage, null);
                pd.SetLine(1, this.line1, false, IntPtr.Zero);
                pd.SetLine(2, this.line2, false, IntPtr.Zero);
                pd.SetLine(3, this.line3, false, IntPtr.Zero);

                PROGDLG dialogFlags = PROGDLG.Normal;
                if (flags.Length != 0)
                {
                    dialogFlags = flags[0];
                    for (var i = 1; i < flags.Length; i++)
                    {
                        dialogFlags = dialogFlags | flags[i];
                    }
                }

                pd.StartProgressDialog(this.parentHandle, null, dialogFlags, IntPtr.Zero);
            }
        }

        public void CloseDialog()
        {
            if (pd != null)
            {
                pd.StopProgressDialog();
                //Marshal.ReleaseComObject(pd);
                pd = null;
            }
        }


        #region "Win32 Stuff"
        // The below was copied from: http://pinvoke.net/default.aspx/Interfaces/IProgressDialog.html

        public static class shlwapi
        {
            [DllImport("shlwapi.dll", CharSet = CharSet.Auto)]
            static extern bool PathCompactPath(IntPtr hDC, [In, Out] StringBuilder pszPath, int dx);
        }

        [ComImport]
        [Guid("EBBC7C04-315E-11d2-B62F-006097DF5BD4")]
        [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
        public interface Win32IProgressDialog
        {
            /// <summary>
            /// Starts the progress dialog box.
            /// </summary>
            /// <param name="hwndParent">A handle to the dialog box's parent window.</param>
            /// <param name="punkEnableModless">Reserved. Set to null.</param>
            /// <param name="dwFlags">Flags that control the operation of the progress dialog box. </param>
            /// <param name="pvResevered">Reserved. Set to IntPtr.Zero</param>
            void StartProgressDialog(
                IntPtr hwndParent, //HWND
                [MarshalAs(UnmanagedType.IUnknown)]    object punkEnableModless, //IUnknown
                PROGDLG dwFlags,  //DWORD
                IntPtr pvResevered //LPCVOID
                );

            /// <summary>
            /// Stops the progress dialog box and removes it from the screen.
            /// </summary>
            void StopProgressDialog();

            /// <summary>
            /// Sets the title of the progress dialog box.
            /// </summary>
            /// <param name="pwzTitle">A pointer to a null-terminated Unicode string that contains the dialog box title.</param>
            void SetTitle(
                [MarshalAs(UnmanagedType.LPWStr)] string pwzTitle //LPCWSTR
                );

            /// <summary>
            /// Specifies an Audio-Video Interleaved (AVI) clip that runs in the dialog box. Note: Note  This method is not supported in Windows Vista or later versions.
            /// </summary>
            /// <param name="hInstAnimation">An instance handle to the module from which the AVI resource should be loaded.</param>
            /// <param name="idAnimation">An AVI resource identifier. To create this value, use the MAKEINTRESOURCE macro. The control loads the AVI resource from the module specified by hInstAnimation.</param>
            void SetAnimation(
                IntPtr hInstAnimation, //HINSTANCE
                ushort idAnimation //UINT
                );

            /// <summary>
            /// Checks whether the user has canceled the operation.
            /// </summary>
            /// <returns>TRUE if the user has cancelled the operation; otherwise, FALSE.</returns>
            /// <remarks>
            /// The system does not send a message to the application when the user clicks the Cancel button.
            /// You must periodically use this function to poll the progress dialog box object to determine
            /// whether the operation has been canceled.
            /// </remarks>
            [PreserveSig]
            [return: MarshalAs(UnmanagedType.Bool)]
            bool HasUserCancelled();

            /// <summary>
            /// Updates the progress dialog box with the current state of the operation.
            /// </summary>
            /// <param name="dwCompleted">An application-defined value that indicates what proportion of the operation has been completed at the time the method was called.</param>
            /// <param name="dwTotal">An application-defined value that specifies what value dwCompleted will have when the operation is complete.</param>
            void SetProgress(
                uint dwCompleted, //DWORD
                uint dwTotal //DWORD
                );

            /// <summary>
            /// Updates the progress dialog box with the current state of the operation.
            /// </summary>
            /// <param name="ullCompleted">An application-defined value that indicates what proportion of the operation has been completed at the time the method was called.</param>
            /// <param name="ullTotal">An application-defined value that specifies what value ullCompleted will have when the operation is complete.</param>
            void SetProgress64(
                ulong ullCompleted, //ULONGLONG
                ulong ullTotal //ULONGLONG
                );

            /// <summary>
            /// Displays a message in the progress dialog.
            /// </summary>
            /// <param name="dwLineNum">The line number on which the text is to be displayed. Currently there are three lines—1, 2, and 3. If the PROGDLG_AUTOTIME flag was included in the dwFlags parameter when IProgressDialog::StartProgressDialog was called, only lines 1 and 2 can be used. The estimated time will be displayed on line 3.</param>
            /// <param name="pwzString">A null-terminated Unicode string that contains the text.</param>
            /// <param name="fCompactPath">TRUE to have path strings compacted if they are too large to fit on a line. The paths are compacted with PathCompactPath.</param>
            /// <param name="pvResevered"> Reserved. Set to IntPtr.Zero.</param>
            /// <remarks>This function is typically used to display a message such as "Item XXX is now being processed." typically, messages are displayed on lines 1 and 2, with line 3 reserved for the estimated time.</remarks>
            void SetLine(
                uint dwLineNum, //DWORD
                [MarshalAs(UnmanagedType.LPWStr)] string pwzString, //LPCWSTR
                [MarshalAs(UnmanagedType.VariantBool)] bool fCompactPath, //BOOL
                IntPtr pvResevered //LPCVOID
                );

            /// <summary>
            /// Sets a message to be displayed if the user cancels the operation.
            /// </summary>
            /// <param name="pwzCancelMsg">A pointer to a null-terminated Unicode string that contains the message to be displayed.</param>
            /// <param name="pvResevered">Reserved. Set to NULL.</param>
            /// <remarks>Even though the user clicks Cancel, the application cannot immediately call
            /// IProgressDialog::StopProgressDialog to close the dialog box. The application must wait until the
            /// next time it calls IProgressDialog::HasUserCancelled to discover that the user has canceled the
            /// operation. Since this delay might be significant, the progress dialog box provides the user with
            /// immediate feedback by clearing text lines 1 and 2 and displaying the cancel message on line 3.
            /// The message is intended to let the user know that the delay is normal and that the progress dialog
            /// box will be closed shortly.
            /// It is typically is set to something like "Please wait while ...". </remarks>
            void SetCancelMsg(
                [MarshalAs(UnmanagedType.LPWStr)] string pwzCancelMsg, //LPCWSTR
                object pvResevered //LPCVOID
                );

            /// <summary>
            /// Resets the progress dialog box timer to zero.
            /// </summary>
            /// <param name="dwTimerAction">Flags that indicate the action to be taken by the timer.</param>
            /// <param name="pvResevered">Reserved. Set to NULL.</param>
            /// <remarks>
            /// The timer is used to estimate the remaining time. It is started when your application
            /// calls IProgressDialog::StartProgressDialog. Unless your application will start immediately,
            /// it should call Timer just before starting the operation.
            /// This practice ensures that the time estimates will be as accurate as possible. This method
            /// should not be called after the first call to IProgressDialog::SetProgress.</remarks>
            void Timer(
                PDTIMER dwTimerAction, //DWORD
                object pvResevered //LPCVOID
                );

        }

        [ComImport]
        [Guid("F8383852-FCD3-11d1-A6B9-006097DF5BD4")]
        public class Win32ProgressDialog
        {
        }

        /// <summary>
        /// Flags that indicate the action to be taken by the ProgressDialog.SetTime() method.
        /// </summary>
        public enum PDTIMER : uint //DWORD
        {
            /// <summary>Resets the timer to zero. Progress will be calculated from the time this method is called.</summary>
            Reset = (0x01),
            /// <summary>Progress has been suspended.</summary>
            Pause = (0x02),
            /// <summary>Progress has been resumed.</summary>
            Resume = (0x03)
        }

        [Flags]
        public enum PROGDLG : uint //DWORD
        {
            /// <summary>Normal progress dialog box behavior.</summary>
            Normal = 0x00000000,
            /// <summary>The progress dialog box will be modal to the window specified by hwndParent. By default, a progress dialog box is modeless.</summary>
            Modal = 0x00000001,
            /// <summary>Automatically estimate the remaining time and display the estimate on line 3. </summary>
            /// <remarks>If this flag is set, IProgressDialog::SetLine can be used only to display text on lines 1 and 2.</remarks>
            AutoTime = 0x00000002,
            /// <summary>Do not show the "time remaining" text.</summary>
            NoTime = 0x00000004,
            /// <summary>Do not display a minimize button on the dialog box's caption bar.</summary>
            NoMinimize = 0x00000008,
            /// <summary>Do not display a progress bar.</summary>
            /// <remarks>Typically, an application can quantitatively determine how much of the operation remains and periodically pass that value to IProgressDialog::SetProgress. The progress dialog box uses this information to update its progress bar. This flag is typically set when the calling application must wait for an operation to finish, but does not have any quantitative information it can use to update the dialog box.</remarks>
            NoProgressBar = 0x00000010
        }
        #endregion
    }
}

如何使用它：

private Pietschsoft.NativeProgressDialog pd;
private uint progressPercent;

Timer timer1 = new Timer();
private void button1_Click_1(object sender, EventArgs e)
{
    timer1.Interval = 300;
    timer1.Tick += (s,ev)=>
    {
        progressPercent++;

        if (pd.HasUserCancelled)
        {
            timer1.Stop();
            pd.CloseDialog();
        }
        else
        {
            // Update the progress value
            pd.Value = progressPercent;

            pd.Line2 = "Percent " + progressPercent.ToString() + "%";

            if (progressPercent >= 100)
            {
                timer1.Stop();
                pd.CloseDialog();
            }
        }
    };


    pd = new Pietschsoft.NativeProgressDialog(this.Handle);
    pd.Title = "Performing Operation";
    pd.CancelMessage = "Please wait while the operation is cancelled";
    pd.Maximum = 100;
    pd.Value = 0;
    pd.Line1 = "Line One";
    pd.Line3 = "Calculating Time Remaining...";

    //pd.ShowDialog(); // Defaults to PROGDLG.Normal
    pd.ShowDialog(Pietschsoft.NativeProgressDialog.PROGDLG.Modal, Pietschsoft.NativeProgressDialog.PROGDLG.AutoTime, Pietschsoft.NativeProgressDialog.PROGDLG.NoMinimize);

    progressPercent = 0;
    timer1.Start();
}

如何调出内置的文件复制对话框？

2 个答案: