Question

将图片放入数据库后，我想将图片复制并重命名为另一个文件夹，但我总是收到此错误 - 路径中的字符无效，即使路径正确。我已经复制并粘贴了我的目录中的路径以避免错误。最初，此代码属于我的程序的添加图像部分（并且它正在工作）。但是当我试图复制粘贴此代码来更新图像部分它不再有效时，我真的不知道为什么。

//choosing a picture and putting the path to pathID.Text
OpenFileDialog dlg = new OpenFileDialog();
dlg.Filter = "All Files(*.*)|*.*|JPG Files(*.jpg)|.jpg|PNG Files(*.png)|*.png";
dlg.Title = "Select Employee Picture.";
if (dlg.ShowDialog() == DialogResult.OK)
{
    string picLoc = dlg.FileName.ToString();
    pathID.Text = picLoc;
    pictureBox5.ImageLocation = picLoc;
    this.pictureBox5.SizeMode = PictureBoxSizeMode.StretchImage;
}
if (pathID.Text == "")
{
    MessageBox.Show("You didn't add your ID Picture");
}
else
{
    try
    {
        //converting image to binary
        byte[] imageID = null;
        FileStream fstream = new FileStream(this.pathID.Text, FileMode.Open, FileAccess.Read);
        BinaryReader br = new BinaryReader(fstream);
        imageID = br.ReadBytes((int)fstream.Length);
        fstream.Close();                    

        //storing image to database
        string login = "server=localhost;database=id;uid=root;password=root;";
        MySqlConnection conn = new MySqlConnection(login);
        conn.Open();
        MySqlCommand cmd = conn.CreateCommand();

        cmd.CommandText = "UPDATE picture SET `Picture_Employee`=@EMP where Employee_ID=@ID";
        cmd.Parameters.AddWithValue("@EMP", imageID);
        cmd.Parameters.AddWithValue("@ID", sampleID.Text);
        cmd.ExecuteNonQuery();
        conn.Close

        //copying file from one path to another
        string newp = "C:\\Users\\Owner\\Documents\\Visual Studio 2013\\Projects\\ID\\ID\\bin\\Debug\\formattedpic\\" + sampleID.Text + "-" + label1.Text + "-IDPIC.jpg";          
        if (File.Exists(newp))
        {
            int i = 1;
            while (File.Exists(newp))
            {
                newp = "C:\\Users\\Owner\\Documents\\Visual Studio 2013\\Projects\\ID\\ID\\bin\\Debug\\formattedpic\\" + sampleID.Text + "-" + label1.Text + "-IDPIC"+i.ToString()+".jpg";
                i++;
            }
        }

        //tried to show path in message box - it is showing correctly
        MessageBox.Show(newp);
        System.IO.File.Copy(pathID.Text, newp);
        MessageBox.Show("ID PICTURE Updated");
    }
}

Answer 1

使用Uri.IsWellFormedOriginalString检查您的路径。

http://msdn.microsoft.com/en-us/library/system.uri.iswellformedoriginalstring.aspx

顺便说一句，这些将让您知道不允许的内容（在互联网资源之上）：

var invalidPathChars = Path.GetInvalidPathChars();
var invalidFileChars = Path.GetInvalidFileNameChars();

复制文件 - 系统参数异常，路径中的无效字符

1 个答案: