Question

我是初学者并且对此计划有疑问。我正在尝试从文本文件中读取表单属性。不幸的是，它只执行最后一行

这是我的文本文件

PDR
1   4   200 200 30  60  UserId  
2   0   300 200 30  100 UserId 
3   1   350 350 30  70  Log In

加载表单属性的构造函数

public Form()
{
    {
        string fn = Path.Combine(path, "Login.Production.txt");
        string[] line;
        if (File.Exists(fn))
        {
            try
            {
                line = File.ReadAllLines(fn);
                string title = line[0];
                if (title == "PDR")
                {
                    for (int i = 1; i < line.Length; i++)
                    {
                        string[] pty = line[i].Split('\t');
                        Items = new List<IFormItem>();
                        Items.Add(new FormItem());

                        foreach (FormItem fi in Items)
                        {
                            fi.Type = (ItemTypes)Enum.Parse(typeof(ItemTypes), pty[1]);
                            fi.Id = Convert.ToInt32(pty[0]);
                            fi.X = int.Parse(pty[2]);
                            fi.Y = Convert.ToInt32(pty[3]);
                            fi.Height = Convert.ToInt32(pty[4]);
                            fi.Width = Convert.ToInt32(pty[5]);
                            fi.Text = pty[6].ToLower();
                        }

                    }
                }
                else
                {
                    throw new Exception("The file is not cofigured.");
                }
            }
            catch (Exception ex) { }
        }
        else
        {
            throw new FileNotFoundException("The file was not found.", fn);
        }

    }
}

Answer 1

一个问题是，您为输入文件的每一行的新对象分配Items;另一个是你为每一行输入迭代Items的每个元素。这是修复它的一种方法：

            if (title == "PDR")
            {
                Items = new List<IFormItem>();
                for (int i = 1; i < line.Length; i++)
                {
                    string[] pty = line[i].Split('\t');
                    FormItem fi = new FormItem();
                    Items.Add(fi);

                    fi.Type = (ItemTypes)Enum.Parse(typeof(ItemTypes), pty[1]);
                    fi.Id = Convert.ToInt32(pty[0]);
                    fi.X = int.Parse(pty[2]);
                    fi.Y = Convert.ToInt32(pty[3]);
                    fi.Height = Convert.ToInt32(pty[4]);
                    fi.Width = Convert.ToInt32(pty[5]);
                    fi.Text = pty[6].ToLower();
                }
            }

另一种方法是使用LINQ：

Items = (from l in line.Skip(1)
         let pty = l.Split('\t')
         select new FormItem
         {
             Type = (ItemTypes)Enum.Parse(typeof(ItemTypes), pty[1]),
             Id = int.Parse(pty[0]),
             X = int.Parse(pty[2]),
             Y = int.Parse(pty[3]),
             Height = int.Parse(pty[4]),
             Width = int.Parse(pty[5]),
             Text = pty[6].ToLower()
         }).ToList<IFormItem>();

For循环问题

1 个答案: