WPF中使用文件浏览对话框的几种方式

WPF本身并没有为我们提供文件浏览的控件, 也不能直接使用Forms中的控件,而文件浏览对话框又是我们最常用的控件之一. 下面是我实现的方式

方式1： 使用win32控件OpenFileDialog

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Microsoft.Win32.OpenFileDialog ofd = new Microsoft.Win32.OpenFileDialog(); ofd.DefaultExt = ".xml"; ofd.Filter = "xml file|*.xml"; if (ofd.ShowDialog() == true) {      //此处做你想做的事 ...=ofd.FileName; }

与之类似的还有 Microsoft.Win32.SaveFileDialog

  

方式2： 使用Forms中的OpenFileDialog控件

WPF中是不能直接使用Forms中的控件的,否则会提示找不到Forms名字控件. 如果你仍然要用, 答案便是添加.net 引用reference

之后就可以像下面一样正常使用Forms中的控件了

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System.Windows.Forms.OpenFileDialog openFileDialog1 = new System.Windows.Forms.OpenFileDialog(); openFileDialog1.InitialDirectory = "c:\\"; openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"; openFileDialog1.FilterIndex = 2; openFileDialog1.RestoreDirectory = true; if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK) {     //此处做你想做的事 ...=openFileDialog1.FileName; }

 

类似的有文件夹浏览对话框:

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System.Windows.Forms.FolderBrowserDialog folderBrowserDialog = new System.Windows.Forms.FolderBrowserDialog(); System.Windows.Forms.DialogResult result = folderBrowserDialog.ShowDialog(); if (result == System.Windows.Forms.DialogResult.OK) {     tb_FolderPath.Text = folderBrowserDialog.SelectedPath; }

 

方式三: 使用win32 api

BOOL WINAPI GetOpenFileName(  __inout  LPOPENFILENAME lpofn)

 

使用这种方式, 你需要自己实现LPOPENFILENAME结构和对GetOpenFileName方法就行封装:

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[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public class OpenFileName {     public int structSize = 0;     public IntPtr hwnd = IntPtr.Zero;     public IntPtr hinst = IntPtr.Zero;     public string filter = null;     public string custFilter = null;     public int custFilterMax = 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 fileExtMax = 0;     public string defExt = null;     public int custData = 0;     public IntPtr pHook = IntPtr.Zero;     public string template = null; }   public class LibWrap {     // Declare a managed prototype for the unmanaged function.     [DllImport("Comdlg32.dll",SetLastError=true,ThrowOnUnmappableChar=true, CharSet = CharSet.Auto)]     public static extern bool GetOpenFileName([In, Out] OpenFileName ofn); }

之后的工作就是实例化、初始化和方法调用了:

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OpenFileName ofn = new OpenFileName(); ofn.structSize = Marshal.SizeOf(ofn); ofn.filter = "Project files\0*.xml"; 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 Project"; ofn.defExt = "xml"; ofn.structSize = Marshal.SizeOf(ofn); if (LibWrap.GetOpenFileName(ofn)) {     //此处做你想做的事 ...=ofn.file; }

 

方式四: 自己写控件(王道)或者使用第三方控件

 

第一种方式由于不能自己输入路径, 只能通过鼠标在treeview中进行选择, 十分的不喜欢;第三种稍微复杂;第四种有待考察,听说的第三方有SystemWrapper和WAF; 所以暂时选择第二种.