从 bindingList c# 中获取属性值

Question

我在 Class Restaurant 中有绑定列表，我需要在我的表单 Form1 中调用它而不使用 foreach 来获取属性。如果没有 foreach，我怎么能访问属性。那可能吗？

这是我的代码：

   public static BindingList<MaterijaliGrid> GetMaterijali(DataGridView dataGridView1)
    {
        BindingList<MaterijaliGrid> materijali = new BindingList<MaterijaliGrid>();
        foreach (DataGridViewRow r in dataGridView1.Rows)
        {
            //while (materijali.Count < 50)
            //{
            materijali.Add(new MaterijaliGrid
            {
                Cosort = r.Cells[0].Value.ToString(),
                Model = r.Cells[1].Value.ToString(),
                Type = r.Cells[2].Value.ToString(),
                Color = r.Cells[3].Value.ToString(),
                Aantal = r.Cells[4].Value.ToString(),

                Unit = r.Cells[5].Value.ToString(),
                Component = r.Cells[6].Value.ToString(),
                Aantal2 = r.Cells[7].Value.ToString(),
                Unitcomp = r.Cells[8].Value.ToString(),
                Opis = r.Cells[9].Value.ToString(),
                Kleur = r.Cells[10].Value.ToString(),
                Soort = r.Cells[11].Value.ToString(),
                Price = r.Cells[12].Value.ToString(),
                Price1 = r.Cells[13].Value.ToString(),
                Price2 = r.Cells[14].Value.ToString(),
                // Oznaka = "MTK"
            });
        }
        //}
        return materijali;
    }

Answer 1

如果您想要更简洁的代码，我建议您将对象绑定到 DataGridView 中。那么，转换就很容易了。像这样：

// Replace list of person with your MaterijaliGrid object
var list = new List<Person>();
list.Add(new Person { FirstName = "Robert", Initial = "Santos", LastName = "Lee" });
list.Add(new Person { FirstName = "Robert1", Initial = "Santos1", LastName = "Lee1" });
list.Add(new Person { FirstName = "Robert2", Initial = "Santos2", LastName = "Lee2" });
list.Add(new Person { FirstName = "Robert3", Initial = "Santos3", LastName = "Lee3" });

// You can hide row header if don't want it.  
dataGridView1.RowHeadersVisible = false;    
dataGridView1.AutoGenerateColumns = true;
dataGridView1.AutoSize = true;            
dataGridView1.DataSource = list;

现在你可以像这样轻松投射了：

// Replace List and BindingList of person with your MaterijaliGrid object
var list = new List<Person>();
list.AddRange(dataGridView1.Rows
                           .Cast<DataGridViewRow>()
                           .Select(row => row.DataBoundItem as Person));

var bindingList = new BindingList<Person>(list);

人 class :

public class Person 
{
   // In case you don't want to display class property with there original names
   // you can annotate the property with DisplayName

   [DisplayName("First Name")]
   public string FirstName {get; set;}
   public string Initial {get; set;}
   public string LastName {get; set;}
}

示例输出：

Answer 2

without using foreach to get properties

在 C# 中有多种方法可以枚举任何数据集合，例如 do, for, foreach in, and the while，它们都是特定于语言的。

此外，自 .Net 3.5（大约自 2008 年以来）以来，添加了一些扩展，用于处理 C# 中的列表处理，即 Language-Integrated Query (LINQ) 查询[=22] 的标准、易于学习的模式=] 和更新数据。术语 querying 是编写从数据源检索数据的表达式的能力，无论该数据源是本地的（对于数组或列表中的代码）还是来自一个数据库。

参见 Getting Started with LINQ in C#，这是对 Linq 的一个很好的介绍。

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