OpenFileDialog 在显示浏览对话框之前抛出 System.IO.FileNotFoundException

Question

我开始在 .NET 5.0 中创建一个简单的 OpenFileDialog，但我得到一个 System.IO.FileNotFoundException: 'Unable to find the specified file.' 在我什至可以看到浏览对话框之前出现异常。

当我单击 m_FileUploader 按钮时，对话框应该会打开。这是我使用的代码：

Main.Designer.cs

  // 
  // m_FileUploader
  // 
  this.m_FileUploader.Location = new System.Drawing.Point(508, 17);
  this.m_FileUploader.Name = "m_FileUploader";
  this.m_FileUploader.Size = new System.Drawing.Size(234, 52);
  this.m_FileUploader.TabIndex = 0;
  this.m_FileUploader.Text = "Browse descr_names.txt";
  this.m_FileUploader.UseVisualStyleBackColor = true;
  this.m_FileUploader.Click += new System.EventHandler(this.FileUploader_Click);
  // 
  // m_OpenFileDialog
  // 
  this.m_OpenFileDialog.Filter = "Names |*descr_names.txt";
  this.m_OpenFileDialog.InitialDirectory = "Documents";
  this.m_OpenFileDialog.Title = "Open descr_names.txt";
  this.m_OpenFileDialog.RestoreDirectory = true;

Main.cs

  private void FileUploader_Click (Object sender, EventArgs e) {
    if (m_OpenFileDialog.ShowDialog() == DialogResult.OK) { // Exception throws here
      // Do stuff with file
    }
  }

当我在调试中单击继续时，其余代码正确执行，但独立可执行文件不喜欢此异常并停止应用程序。

我在这里忘记了什么？

Answer 1

您应该为 InitialDirectory 使用不同的值，因为值 Documents 可能无法正确处理。相反，你应该这样做：

using System;

// Get path for User's documents folder from .NET
var pathToDocs = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments));
this.m_OpenFileDialog.InitialDirectory = pathToDocs;

见documentation for more details about SpecialFolder. Or InitialDirectory documentation。

OpenFileDialog 在显示浏览对话框之前抛出 System.IO.FileNotFoundException

OpenFileDialog throwing System.IO.FileNotFoundException before it shows the browse dialog

c#

forms

.net-5