是否有“DisplayMember”？和“ValueMember”就像 CheckedListBox 控件的属性一样？ C# winforms

发布于 2024-09-25 16:03:14 字数 302 浏览 9 评论 0原文

我有一个具有以下结构的 DataTable：

ID | VALUE
----------------
1  | Item 1
2  | Item 2
3  | Item 3

并且通过将每一行添加为一个项目，将 DataTable 中的值显示到 CheckedListBox 控件中。

但是我怎样才能包含ID呢？是否有“DisplayMember”和“ValueMember”之类的 CheckedListBox 控件的属性？

原文

I have this DataTable with the following structure:

ID | VALUE
----------------
1  | Item 1
2  | Item 2
3  | Item 3

And I display the values from the DataTable into a CheckedListBox control by adding each row as an item.

But how can I include the ID?
Is there "DisplayMember" and "ValueMember" like Properties for CheckedListBox control?

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南笙 2024-10-02 16:03:14

是的，CheckedListBox 上有 DisplayMember 和 ValueMember 属性，尽管 ValueMember 声称它“与此类无关”。

这是一个显示 DisplayMember 工作的简单示例：

using System;
using System.Drawing;
using System.Windows.Forms;

class Test
{
    static void Main()
    {
        CheckedListBox clb = new CheckedListBox {
            DisplayMember = "Foo",
            ValueMember = "Bar",
            Items = {
                new { Foo = "Hello", Bar = 10 },
                new { Foo = "There", Bar = 20 }
            }
        };
        Form f = new Form
        {
            Controls = { clb }
        };
        Application.Run(f);
    }
}

另请注意，文档指出：

您无法将数据绑定到 CheckedListBox。为此，请使用组合框或列表框。
有关详细信息，请参阅如何：将 Windows 窗体组合框或列表框控件绑定到数据。

鉴于上面的代码有效，大概它正在谈论更高级的数据绑定，使用DataSource？

Well yes, there are DisplayMember and ValueMember properties on CheckedListBox, although the docs for ValueMember claim it's "not relevant to this class".

Here's a quick example showing DisplayMember working:

using System;
using System.Drawing;
using System.Windows.Forms;

class Test
{
    static void Main()
    {
        CheckedListBox clb = new CheckedListBox {
            DisplayMember = "Foo",
            ValueMember = "Bar",
            Items = {
                new { Foo = "Hello", Bar = 10 },
                new { Foo = "There", Bar = 20 }
            }
        };
        Form f = new Form
        {
            Controls = { clb }
        };
        Application.Run(f);
    }
}

Also note that the docs state:

You cannot bind data to a CheckedListBox. Use a ComboBox or a ListBox for this instead.
For more information, see How to: Bind a Windows Forms ComboBox or ListBox Control to Data.

Given the above code which works, presumably it's talking about more advanced data binding, using DataSource?

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碍人泪离人颜 2024-10-02 16:03:14

DataSource、DisplayMember 和 ValueMember 属性可用于此控件，但它们不会显示在 IntelliSense 中：MSDN

不过，您应该能够使用它们。

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笑脸一如从前 2024-10-02 16:03:14

是的，CheckedListBox 中有“显示成员”和“值成员”属性。

您可以像在组合框中一样设置属性：

   public void PopulateListBox(System.Windows.Forms.CheckedListBox lb, string displayMember, string valueMember, DataTable data)
   {
        lb.DataSource = data; // where data is the datatable. datatable filled up with //data fetched from database.
        lb.ValueMember = valueMember;
        lb.DisplayMember = displayMember;
   }

Yes there are 'display member' and 'value member' properties in CheckedListBox.

You can set the properties as you do in combobox:

   public void PopulateListBox(System.Windows.Forms.CheckedListBox lb, string displayMember, string valueMember, DataTable data)
   {
        lb.DataSource = data; // where data is the datatable. datatable filled up with //data fetched from database.
        lb.ValueMember = valueMember;
        lb.DisplayMember = displayMember;
   }

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