手动的DataGridViewComboBoxCell设定值，值无效 [英] DataGridViewComboBoxCell setting value manually, value not valid

问题描述

下面是我的代码：

        private class Person
        {
            private string myName;
            private int myValue;

            public Person(string name, int value)
            {
                myName = name; 
                myValue = value;
            }
            public override string ToString()
            {
                return myName;
            }

            public string Name
            {
                get { return myName; }
                set { myName = value; }
            }

            public int Value
            {
                get { return myValue; }
                set { myValue = value; }
            }
        }

我用它来填充的DataGridViewComboBoxCell是这样的：

I use it to fill a DataGridViewComboBoxCell like this:

myDataGridViewComboBoxCell.ValueMember = "Value";
myDataGridViewComboBoxCell.DisplayMember = "Name";
myDataGridViewComboBoxCell.Items.Add(new Person("blabla", someNumber));

所有我想现在要做的就是选择一个人：

all I want to do now is to select a person:

myDataGridViewComboBoxCell.Value = someNumber;

但总是收到值无效误差。任何想法，为什么？
当我选择在我的程序中的项目，我可以看到正确的价值（someNumber），以便显示和ValueMember设置正确...

but keep getting "value is not valid"-error. Any Idea why? When I select an Item in my program I can see the right Value (someNumber) so Display and ValueMember are set correctly...

推荐答案

而不是增加 DataGridViewComboBoxColumn.Items ，你需要设置 DataGridViewComboBoxColumn.DataSource 来人的名单，并设置 DataGridViewComboBoxColumn.ValueType = typeof运算（人）。

Rather than adding to DataGridViewComboBoxColumn.Items, you'll need to set DataGridViewComboBoxColumn.DataSource to a List of Person, and set DataGridViewComboBoxColumn.ValueType = typeof(Person).

应该这样做。虽然给予它已经两个月了，你问这个，你的问题可能已经失去了它的紧迫感。

Should do it. Although given it's been two months since you asked this, your problem may have lost it's sense of urgency.

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