我将DataGridView控件绑定到List集合。因此,我可以编辑集合的元素。有什么方法可以使用此网格启用将元素删除和添加到集合的功能吗?
最佳答案
通用List<T>
不完全支持对DataGridView
的绑定,如您所见,您可以编辑列表中的项目,但不能添加或删除。
您需要使用的是BindingList<T>
或BindingSource
。BindingList<T>
允许您使用UI在网格中添加和删除行-当您将DataSource
更改为网格时,您将在网格的底部看到空白的新行。您仍然无法以编程方式添加或删除行。为此,您需要一个BindingSource
。
两者的示例如下(使用示例Users类,但此处的细节并不重要)。
public partial class Form1 : Form
{
private List<User> usersList;
private BindingSource source;
public Form1()
{
InitializeComponent();
usersList = new List<User>();
usersList.Add(new User { PhoneID = 1, Name = "Fred" });
usersList.Add(new User { PhoneID = 2, Name = "Tom" });
// You can construct your BindingList<User> from the List<User>
BindingList<User> users = new BindingList<User>(usersList);
// This line binds to the BindingList<User>
dataGridView1.DataSource = users;
// We now create the BindingSource
source = new BindingSource();
// And assign the List<User> as its DataSource
source.DataSource = usersList;
// And again, set the DataSource of the DataGridView
// Note that this is just example code, and the BindingList<User>
// DataSource setting is gone. You wouldn't do this in the real world
dataGridView1.DataSource = source;
dataGridView1.AllowUserToAddRows = true;
}
// This button click event handler shows how to add a new row, and
// get at the inserted object to change its values.
private void button1_Click(object sender, EventArgs e)
{
User user = (User)source.AddNew();
user.Name = "Mary Poppins";
}
}
关于c# - 通过DataGridView将元素添加到集合中,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/5731389/