Question

我正在尝试使用以下代码从mysql本地服务器备份我的数据库：

string folder = DateTime.Now.Date.ToString("yyyy-MM-dd");                  
var root = Path.Combine(Path.GetDirectoryName(Application.ExecutablePath),"Database backup");
var newFolderPath = Path.Combine(root, folder);

if (!Directory.Exists(newFolderPath))  // if it doesn't exist, create
    Directory.CreateDirectory(newFolderPath);

MySqlConnection myCon = frmStudentsSignup.establishConnectionToMysql();
using(MySqlCommand cmd = new MySqlCommand()) {
  using(MySqlBackup mb = new MySqlBackup(cmd)) {
    cmd.Connection = myCon;
    myCon.Open();
    mb.ExportToFile(newFolderPath);
    myCon.Close();
  }
}

午餐后这行

mb.ExportToFile(newFolderPath);

我得到了

access to the path ... is denied.

我的路径位于visual studio项目目录。

此外，新目录的创建正在进行，因此我不知道可能出现的问题。

Answer 1

只是一个建议，但您可以在目录路径中尝试使用尾部斜杠，即将newFolderPath分配行更改为

var newFolderPath = Path.Combine(root, folder) + Path.DirectorySeparatorChar;

如果这没有帮助，请尝试使用短路径并且不包含空格或破折号（ - ）等特殊字符，例如C：\ testpath \

Answer 2

您尝试将其另存为文件夹，而不是文件。这是修复：

string folder = DateTime.Now.Date.ToString("yyyy-MM-dd");
var root = Path.Combine(Path.GetDirectoryName(Application.ExecutablePath), "Database backup");
var newFolderPath = Path.Combine(root, folder);

if (!Directory.Exists(newFolderPath))  // if it doesn't exist, create
    Directory.CreateDirectory(newFolderPath);

// Fixed
string newFileFolderPath = Path.Combine(newFolderPath, "mybackup.sql");

MySqlConnection myCon = frmStudentsSignup.establishConnectionToMysql();
using (MySqlCommand cmd = new MySqlCommand())
{
    using (MySqlBackup mb = new MySqlBackup(cmd))
    {
        cmd.Connection = myCon;
        myCon.Open();
        mb.ExportToFile(newFileFolderPath);
        myCon.Close();
    }
}

使用mysqlBackup备份数据库时拒绝访问路径

2 个答案: