Question

我是表达混合的新手。在开发桌面应用程序时，我收到一条错误，说“在声明类型上缺少部分修饰符”，但我已经通过在公共和类之间放置partial关键字来纠正它。在纠正之后我得到了以下错误，如果你能够妥善解决这些错误，我将非常感谢你

The name 'startPoint' does not exist in the current context  
C:\Documents and Settings\acer\Desktop\my inter\rrrr\dragDrop(test1)\dragDrop(test1)\Window1.xaml.cs    24  9   dragDrop(test1)

The type or namespace name 'contact' could not be found (are you missing a using directive or an assembly reference?)
C:\Documents and Settings\acer\Desktop\my inter\rrrr\dragDrop(test1)\dragDrop(test1)\Window1.xaml.cs    67  32  dragDrop(test1)

The type or namespace name 'Contact' could not be found (are you missing a using directive or an assembly reference?)
C:\Documents and Settings\acer\Desktop\my inter\rrrr\dragDrop(test1)\dragDrop(test1)\Window1.xaml.cs    67  13  dragDrop(test1)

代码：

private void List_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    startPoint = e.GetPosition(null);
}

private void List_MouseMove(object sender, MouseEventArgs e)
{
    Vector diff = startPoint - mousePos;
    Contact contact = (contact)listView.ItemContainerGenerator.IndexFromContainer(listViewItem);
    DataObject dragData = new DataObject("myFormat", contact);
}

private void DropList_Drop(object sender, DragEventArgs e)
{
    listView.Items.Add(contact);
}

Answer 1

要解决第一个错误，请添加此类成员:(只在任何方法之外将其声明在顶部）

~~Point startPoint = Point.Empty;~~

Point startPoint = new Point();

第二个错误更棘手..从我所见，IndexFromContainer方法返回整数，但假设listViewItem已经是Contact类型，请尝试将该行更改为：

Contact contact = (Contact)listViewItem;

看起来你错过了Contact类的定义..找不到任何标准，但我想你的意思是这个类？

public class Contact
{
    public Contact()
    {
    }

    public string Name
    {
        get;
        set;
    }

    public string Email
    {
        get;
        set;
    }

    public string PhoneNumber
    {
        get;
        set;
    }
}

声明类型错误时缺少部分修饰符

1 个答案: