FolderBrowserDialog不显示目录结构 [英] FolderBrowserDialog does not shows the directory structure

问题描述

大家好，

推荐答案

您需要在STAThread中运行代码。
您可以得到一个例子（来自Scott Thornton）来自http://p2p.wrox.com/book-beginning-vb-net-2nd-edition-beginning-vb-net-2003/42178-using-openfiledialog.html下面

再现：

OpenFileDialog_Class oOpenDialog =新OpenFileDialog_Class（）;
线程tFileNameThread =新主题（新的ThreadStart（oOpenDialog.StartThread））;
tFileNameThread.SetApartmentState（ApartmentState.S TA）; //必须设置为tFileNameThread.Start（）; //启动线程
tFileNameThread.Join（）;
sTemplate = oInvoice.GetTemplateName（）; //获取要使用的文件的路径/名称
---------------
以下是上述主题的类
使用System;
使用System.IO;
使用System.Data;
使用System.Configuration;
使用System.Web;
使用System.Web.Security ;
使用System.Web.UI;
使用System.Web.UI.WebControls;
使用System.Web.UI.WebControls.WebParts;
使用System.Web.UI .HtmlControls;
使用System.Windows.Forms;

///< summary>
/// OpenFileDialog_Class的摘要描述
///< /摘要>
公共类OpenFileDialog_Class
{
     public string sTemplate = null;
     public OpenFileDialog_Class（）
     {
         //
        ;  // TODO：在此处添加构造函数逻辑         //
      &nb sp;  // GetTemplate（）;
    }
     public void StartThread（）
      {
         sTemplate = GetTemplate（）;
    }

     [STAThread] //必须声明此内容，否则您的主题崩溃了     public string GetTemplate（）
     ; {
         string sTemplate = null;
         try
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; {
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;打开文件对话框的OpenFileDialog =新的OpenFileDialog（）;
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; openFileDialog.InitialDirectory = Directory.GetCurrentDirectory（）;
&NBSP;&NBSP ;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; openFileDialog.Filt er =" Word模板（* .dot）| * .dot |所有文件（*。*）| *。*" ;;
         &NBSP;&NBSP;&NBSP;&NBSP; openFileDialog.FilterIndex = 1;
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; openFileDialog.RestoreDirectory = TRUE; <无线电通信/>
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;若（openFileDialog.ShowDialog（）== DialogResult.OK）
&NBSP;&NBSP ;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; {
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP;&NBSP; INT iStartFile = openFileDialog.FileName.LastIndexOf（QUOT; \\"）;
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP ;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;尽量
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; {
               &nbs磷;&NBSP;&NBSP;&NBSP; sTemplate = openFileDialog.FileName;
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; }                 catch（exception ex）
   &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; {
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP ;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;的System.Console.WriteLine（ex.Message）;
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;}
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;}
        }
         catch（Exception ex）
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; {
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; // LogWrit er_Class sw = new LogWriter_Class（）;
             // sw.logError（ex，"错误，请检查日志文件。"，"错误"）;
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;}
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;返回sTemplate; <无线电通信/>    }
     [STAThread]
     public string GetTemplateName（）
   ;   {
         return sTemplate;
    }
}

you need to run your code in an STAThread.
You can get an example (by Scott Thornton) from
http://p2p.wrox.com/book-beginning-vb-net-2nd-edition-beginning-vb-net-2003/42178-using-openfiledialog.html

reproduced below:

OpenFileDialog_Class oOpenDialog = new OpenFileDialog_Class();
Thread tFileNameThread = new Thread(new ThreadStart(oOpenDialog.StartThread));
tFileNameThread.SetApartmentState(ApartmentState.S TA); //This must be set
tFileNameThread.Start(); //Start the thread
tFileNameThread.Join();
sTemplate = oInvoice.GetTemplateName(); //Get the path/name of the file to use
---------------
Below is the class for the thread above

using System;
using System.IO;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Windows.Forms;

/// <summary>
/// Summary description for OpenFileDialog_Class
/// </summary>
public class OpenFileDialog_Class
{
    public string sTemplate = null;
    public OpenFileDialog_Class()
    {
        //
        // TODO: Add constructor logic here
        //
        //GetTemplate();
    }
    public void StartThread()
    {
        sTemplate = GetTemplate();
    }

    [STAThread] //Must have this declared, or your thread crashes
    public string GetTemplate()
    {
        string sTemplate = null;
        try
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.InitialDirectory = Directory.GetCurrentDirectory();
            openFileDialog.Filter = "Word Template (*.dot)|*.dot|All files (*.*)|*.*";
            openFileDialog.FilterIndex = 1;
            openFileDialog.RestoreDirectory = true;

            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                int iStartFile = openFileDialog.FileName.LastIndexOf("\\");
                try
                {
                    sTemplate = openFileDialog.FileName;
                }
                catch (Exception ex)
                {
                    System.Console.WriteLine(ex.Message);
                }
            }
        }
        catch (Exception ex)
        {
            //LogWriter_Class sw = new LogWriter_Class();
            //sw.logError(ex, " error, check the log file.", " Error");
        }
        return sTemplate;
    }
    [STAThread]
    public string GetTemplateName()
    {
        return sTemplate;
    }
}

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