我不能在我的应用程序中使用 OpenFileDialog。
作为替代,我使用 GetOpenFileName() 方法:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
namespace Reader
{
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public class OpenFileName
{
public int lstructSize;
public IntPtr hwndOwner;
public IntPtr hInstance;
public string lpstrFilter = null;
public string lpstrCustomFilter = null;
public int lMaxCustomFilter;
public int lFilterIndex;
public string lpstrFile = null;
public int lMaxFile = 0;
public string lpstrFileTitle = null;
public int lMaxFileTitle = 0;
public string lpstrInitialDir = null;
public string lpstrTitle = null;
public int lFlags;
public ushort nFileOffset;
public ushort nFileExtension;
public string lpstrDefExt = null;
public int lCustData;
public int lpfHook;
public int lpTemplateName;
}
public class OpenDialog
{
[DllImport("Comdlg32.dll",CharSet = CharSet.Auto)]
public static extern bool GetOpenFileName([In, Out] OpenFileName ofn);
}
}
然后在按钮的 OnClick 事件中使用它,如下所示:
OpenFileName qofn = new OpenFileName();
qofn.lstructSize = Marshal.SizeOf(qofn);
qofn.lpstrFile = "";
qofn.lMaxFile = 256;
qofn.lpstrFileTitle = "";
qofn.lMaxFileTitle = 64;
qofn.hInstance = this.Handle;
source.Text = "Wait...";
if (OpenDialog.GetOpenFileName(qofn))
{
MessageBox.Show("ofn.file: " + qofn. lpstrFile );
}
当应用程序运行并单击按钮并尝试打开文件时,会发生以下情况:
第一次尝试:
它返回到我的文件的路径,但不是
c:\dira\dirb\dirc\filename.ext
我有
c:\dira\dirb\dircfilename.ext
文件名前没有“\”
第二次尝试
一切都好
下一个:
有随机崩溃,例如随机访问冲突,或 GUI 卡住,即使在任务管理器或其他错误中也无法终止应用程序的进程。
通常对话框在应用程序崩溃之前工作 2-3 次。
我的代码有什么问题?
编辑:
我不能使用 OpenFileDialog。我正在使用 WinPE 4.0(Windows 评估和部署工具包 ADK)。当我尝试 OpenFileDialog 时,它抛出运行时错误 80040111 .可能是因为不支持核心(就像Server Core不支持OpenFileDialog,错误一样)。可能在 WinPE 4.0 上,他们在记事本等应用程序中使用 GetOpenFileName。它对他们有用。
最佳答案
好的,我找到了这个微软示例并且它有效:
// Copyright
// Microsoft Corporation
// All rights reserved
// OpenFileDlg.cs
using System;
using System.Text;
using System.Runtime.InteropServices;
/*
typedef struct tagOFN {
DWORD lStructSize;
HWND hwndOwner;
HINSTANCE hInstance;
LPCTSTR lpstrFilter;
LPTSTR lpstrCustomFilter;
DWORD nMaxCustFilter;
DWORD nFilterIndex;
LPTSTR lpstrFile;
DWORD nMaxFile;
LPTSTR lpstrFileTitle;
DWORD nMaxFileTitle;
LPCTSTR lpstrInitialDir;
LPCTSTR lpstrTitle;
DWORD Flags;
WORD nFileOffset;
WORD nFileExtension;
LPCTSTR lpstrDefExt;
LPARAM lCustData;
LPOFNHOOKPROC lpfnHook;
LPCTSTR lpTemplateName;
#if (_WIN32_WINNT >= 0x0500)
void * pvReserved;
DWORD dwReserved;
DWORD FlagsEx;
#endif // (_WIN32_WINNT >= 0x0500)
} OPENFILENAME, *LPOPENFILENAME;
*/
[ StructLayout( LayoutKind.Sequential, CharSet=CharSet.Auto )]
public class OpenFileName
{
public int structSize = 0;
public IntPtr dlgOwner = IntPtr.Zero;
public IntPtr instance = IntPtr.Zero;
public String filter = null;
public String customFilter = null;
public int maxCustFilter = 0;
public int filterIndex = 0;
public String file = null;
public int maxFile = 0;
public String fileTitle = null;
public int maxFileTitle = 0;
public String initialDir = null;
public String title = null;
public int flags = 0;
public short fileOffset = 0;
public short fileExtension = 0;
public String defExt = null;
public IntPtr custData = IntPtr.Zero;
public IntPtr hook = IntPtr.Zero;
public String templateName = null;
public IntPtr reservedPtr = IntPtr.Zero;
public int reservedInt = 0;
public int flagsEx = 0;
}
public class LibWrap
{
//BOOL GetOpenFileName(LPOPENFILENAME lpofn);
[ DllImport( "Comdlg32.dll", CharSet=CharSet.Auto )]
public static extern bool GetOpenFileName([ In, Out ] OpenFileName ofn );
}
public class App
{
public static void Main()
{
OpenFileName ofn = new OpenFileName();
ofn.structSize = Marshal.SizeOf( ofn );
ofn.filter = "Log files\0*.log\0Batch files\0*.bat\0";
ofn.file = new String( new char[ 256 ]);
ofn.maxFile = ofn.file.Length;
ofn.fileTitle = new String( new char[ 64 ]);
ofn.maxFileTitle = ofn.fileTitle.Length;
ofn.initialDir = "C:\\";
ofn.title = "Open file called using platform invoke...";
ofn.defExt = "txt";
if( LibWrap.GetOpenFileName( ofn ))
{
Console.WriteLine( "Selected file with full path: {0}", ofn.file );
Console.WriteLine( "Selected file name: {0}", ofn.fileTitle );
Console.WriteLine( "Offset from file name: {0}", ofn.fileOffset );
Console.WriteLine( "Offset from file extension: {0}", ofn.fileExtension );
}
}
}
关于c# - 使用 GetOpenFileName 而不是 OpenFileDialog,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9088227/