有关将新项目添加到列表的任何想法c#

问题描述

我有一个2D数组，我正在尝试将其写入列表，以便可以将其与数据网格绑定.
以下是我的代码.

i have an 2D array which i am trying to write into a List so i can bind it with a datagrid.
below is my code.

string[,] array = new string[8,4];
 array[counting2, 0] = txtSend.Text;
 array[counting2, 1] = One;
 array[counting2, 2] = Two;
 array[counting2, 3] = Three;

 List<testing> Hello1 = new List<testing>();

 Testing Hello = new Testing();
 for (int i = 0; i <= counting2;i++ )
 {
     Hello.year = array[counting2, 0];
     Hello.One = array[counting2, 1];
     Hello.Two = array[counting2, 2];
     Hello.Three = array[counting2, 3];
     Hello1.Add(Hello);

 }
dataGrid1.ItemsSource = Hello1;</testing></testing>

可以看到，当我的数组包含3行时，数据网格显示3行具有相同的数据，而不是3个不同的数据.我猜是我要向列表中添加Hello的次数是3次.
但是我是否将Hello更改为variabele，以便每次for循环循环其另一个名称时.
Ne Ideas ??

What is see is when my array contain 3 rows the data grids shows 3 rows with the same data instead of 3 diffrent data. I am guessing is that i am adding Hello to the list 3 times.
But do i change the Hello to a variabele so each time the for loop loops its another name.
Ne Ideas ??

推荐答案

for (int i = 0; i <= counting2;i++ )
{
    Testing Hello = new Testing();
    Hello.year = array[counting2, 0];
    Hello.One = array[counting2, 1];
    Hello.Two = array[counting2, 2];
    Hello.Three = array[counting2, 3];

    Hello1.Add(Hello);
}
dataGrid1.ItemsSource = Hello1;

可以将Testing变量Hello的作用域仅限定在for循环内.实际上，这就是您将获得新对象引用以添加到列表中的方式.

It''s okay to have the Testing variable Hello scoped only within the for loop. In fact, this is how you''ll get a new object reference to add to the list.

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