如何将图像文件从一个文件夹移动到另一个文件夹

I am looking for a way to move a file from one directory to another using C#. I have a forms application that I would like to have the user select a file using the file chooser and upon clicking the "Set Background" button have the file transferred to a location specified within the application.

我正在寻找一种方法,使用C#将文件从一个目录移动到另一个目录。我有一个表单应用程序,我希望用户使用文件选择器选择一个文件,并在单击“设置背景”按钮时将文件传输到应用程序中指定的位置。

Upon trying the answer provided by @VulgarBinary I am getting the following exception:

在尝试@VulgarBinary提供的答案后,我得到以下异常:

System.IO.IOException: Cannot create a file when that file already exists.

2 个解决方案

#1

You will need to ensure your program has appropriate permissions to write the files but:

您需要确保您的程序具有编写文件的适当权限,但是:

if (File.Exists(sourcePath))
{
   File.Move(sourcePath, destinationPath);
}

This should work to do what you are wanting to do.

这应该可以做你想做的事情。

Example:

var sourcePath = "C:\Users\someuser\Pictures\VulgarBinary.jpg";
var destinationPath = "C:\Whatever\Path\You\Want\VulgarBinary.jpg";

EDIT 1

Given your comments below this answer you are running into a problem where the file you are creating already exists. If you would like to replace this you can simple do:

鉴于您在此答案下方的评论,您遇到的问题是您正在创建的文件已存在。如果你想替换它,你可以简单地做:

if (File.Exists(sourcePath))
{
   if(File.Exists(destinationPath))
      File.Delete(destinationPath);
   File.Move(sourcePath, destinationPath);
}

If you don't care what the output file's name is and just always want to write it you can do something like:

如果您不关心输出文件的名称是什么,并且总是想要写它,您可以执行以下操作:

var outputDirectory = "C:\\Whatever\\Path\\You\\Want\\";

if (File.Exists(sourcePath))
{
   File.Move(sourcePath, outputDirectory + Guid.NewGuid().ToString() + ".jpg");
}

The latter will always copy the file (all-be-it with a different name). The first solution will replace any file with the same name with your new file.

后者将始终复制文件(所有人都使用不同的名称)。第一个解决方案将使用新文件替换任何具有相同名称的文件。

Cheers!

#2

Here is a code sample and scaffold for you in which I use @VulgarBinary´s proposal.

这是一个代码示例和脚手架,我使用@ VulgarBinary的提议。

private string sourcePath;
private string destinationPath;

public Form1()
{
    destinationPath = @"c:\users\name\desktop\"; // f.e.
    InitializeComponent();
}

//Browse Button
private void button1_Click(object sender, EventArgs e)
{
    using (OpenFileDialog dlg = new OpenFileDialog())
    {
        dlg.Title = "Open Image";
        dlg.Filter = "bmp files (*.bmp)|*.bmp"; // you can filter whatever format you want

        if (dlg.ShowDialog() == DialogResult.OK)
        {
            sourcePath = dlg.FileName;
        }
    }

}

//Set Background Button
private void button2_Click(object sender, EventArgs e)
{
    if (!string.IsNullOrWhiteSpace(sourcePath) && File.Exists(sourcePath))
    {
        destinationPath += Path.GetFileName(sourcePath);
        File.Move(sourcePath, destinationPath);
    }
}