在Xamarin C#中以编程方式绑定ListView [英] programatically binding a listview in xamarin c#

问题描述

我想在Xamarin Portable中创建一个列表视图， 列表视图的项目源是List<String>，而我的列表视图的数据模板是通过此函数准备的，

I want to create a listview in Xamarin portable, the item source of the listview is List<String> and my datatemplate of the listview is prepared by this function,

private DataTemplate createItemtemplate()
{
    try
    {
        Label lbl_binding = new Label()
        {
            TextColor = Color.Red,
            FontSize = 16,
            VerticalTextAlignment = TextAlignment.Center,
            HorizontalOptions = LayoutOptions.CenterAndExpand,
        };
        lbl_binding.SetBinding(Label.TextProperty, ".");
        StackLayout stkBottom = new StackLayout()
        {
            Orientation = StackOrientation.Horizontal,
            HorizontalOptions = LayoutOptions.CenterAndExpand,
            VerticalOptions = LayoutOptions.Center,
            Padding = new Thickness(0),
        };
        stkBottom.Children.Add(lbl_binding);
        ViewCell vc = new ViewCell() {
            View = stkBottom
        };

        DataTemplate Dp = new DataTemplate(() =>
        {
            return vc;
        });
        return Dp;
    }
    catch (Exception ex)
    {
        return null;
    }
}

现在，我的列表视图已填充，但所有标签中都填充了最后一个项目，我的意思是正确地填充了所有项目，但所有项目仅填充了最后一个项目. 我在这里做错了什么?

Now, my list view is populated, but all the labels are filled with last item, I mean the no of items are rightly populated, but all the items are filled with the last item only. what i am doing wrong here?

lstAdmin = new ListView()
{
    ItemTemplate = createItemtemplate(),
};
lstadmin.Itemsource = source;

推荐答案

public class AdminCell : ViewCell
{
    public AdminCell()
    {
        Label lbl_binding = new Label()
        {
            TextColor = Color.FromRgb(30, 144, 255),
            FontSize = 16,
            VerticalTextAlignment = TextAlignment.Center,
            HorizontalOptions = LayoutOptions.CenterAndExpand,
        };
        lbl_binding.SetBinding(Label.TextProperty, ".");
        StackLayout stkBottom = new StackLayout()
        {
            Orientation = StackOrientation.Horizontal,
            HorizontalOptions = LayoutOptions.CenterAndExpand,
            VerticalOptions = LayoutOptions.Center,
            Padding = new Thickness(0),
        };
        stkBottom.Children.Add(lbl_binding);
        View = stkBottom;
    }
}

此代码对我有用，删除了模板并使用此单元格，我仍然不明白为什么数据模板不起作用

this code is working for me removed the template and use this cell, i still don't understand why the data template is not working

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