C# 如何制作OpenFileDialog控件中所选文件的副本

在上面的代码中，我浏览要打开的文件。我要做的是，浏览一个文件，选择它，然后按ok。单击“确定”后，我想复制所选文件，并为该重复文件提供.txt扩展名。我需要帮助来实现这一目标

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谢谢

您使用了文件。请按如下方式复制

// Browses file with OpenFileDialog control

    private void btnFileOpen_Click(object sender, EventArgs e)
    {
        OpenFileDialog openFileDialogCSV = new OpenFileDialog();

        openFileDialogCSV.InitialDirectory = Application.ExecutablePath.ToString();
        openFileDialogCSV.Filter = "CSV files (*.csv)|*.csv|All files (*.*)|*.*";
        openFileDialogCSV.FilterIndex = 1;
        openFileDialogCSV.RestoreDirectory = true;

        if (openFileDialogCSV.ShowDialog() == DialogResult.OK)
        {
            this.txtFileToImport.Text = openFileDialogCSV.FileName.ToString();
        }

    }

试试这个

File.Copy(openFileDialogCSV.FileName., openFileDialogCSV.FileName + ".txt");

123可以通过您想要的任何文件名进行更改

private void btnFileOpen_Click(object sender, EventArgs e)
    {
        OpenFileDialog openFileDialogCSV = new OpenFileDialog();

        openFileDialogCSV.InitialDirectory = Application.ExecutablePath.ToString();
        openFileDialogCSV.Filter = "CSV files (*.csv)|*.csv|All files (*.*)|*.*";
        openFileDialogCSV.FilterIndex = 1;
        openFileDialogCSV.RestoreDirectory = true;

        if (openFileDialogCSV.ShowDialog() == DialogResult.OK)
        {
            this.txtFileToImport.Text = openFileDialogCSV.FileName.ToString();
    System.IO.File.Copy(this.txtFileToImport.Text,"C://123.txt")
        }

    }

上述代码将所选文件复制为同名的txt文件，并将其复制到同一目录中

如果需要用相同的名称覆盖现有文件，请将另一个参数添加到复制方法中，使其为true

if (openFileDialogCSV.ShowDialog() == DialogResult.OK)
{
    var fileName = openFileDialogCSV.FileName;
    System.IO.File.Copy( fileName ,Path.Combine(Path.GetDirectoryName(fileName), Path.GetFileNameWithoutExtension(fileName)+".txt"));
}