Question

不断收到此行的错误：

var imagePath = dataGrid1.SelectedItems[5].ToString();

指数超出范围。必须是非负数且小于集合的大小。参数名称：index

尝试将数据网格中的单元格存储在var / string中（它包含路径+文件名），以便我可以通过ftp将其删除。

        private void button2_Click(object sender, RoutedEventArgs e)
    {
        var imagePath = dataGrid1.SelectedItems[5].ToString();
        Student selected = dataGrid1.SelectedItem as Student;
        if (selected == null)
            MessageBox.Show("You must select a student");
        else
        {
            if (MessageBoxResult.Yes == MessageBox.Show("Are you sure", "delete student",
                MessageBoxButton.YesNo, MessageBoxImage.Warning))
            {
                FTPdelete(imagePath, "Administrator", "commando");
                Class1.DeleteStudent(selected);
                Window_Loaded(null, null);
            }
        }
    }
    private void FTPdelete(String imagePath, String inUsername, String inPassword)
    {
        var req = (FtpWebRequest)WebRequest.Create(imagePath);
        req.Proxy = null;
        req.Credentials = new NetworkCredential(inUsername, inPassword);

        req.Method = WebRequestMethods.Ftp.DeleteFile;

        req.GetResponse().Close();
    }

}

}

Answer 1

我认为你在SelectedItems和SelectedItem之间混淆了它 - SelectedItems should return a IEnumerable of the selected items - 看起来你正试图访问SelectedItem的一列。

如果学生有ImagePath，您可以稍微重新订购，只需：

Student selected = dataGrid1.SelectedItem as Student;
var imagePath = selected.ImagePath;

C＃datagrid索引超出范围

1 个答案: