在Xamarin Forms中点击ViewCell后如何刷新TableView数据？
在Xamarin Forms中点击ViewCell后如何刷新TableView数据？
提问于 2016-12-22 14:42:49
因此，我有以下代码来动态地为我的TableView创建ViewCells：
XAML：
<StackLayout>
<TableView Intent="Settings">
<TableView.Root>
<TableSection x:Name="tableSection"></TableSection>
</TableView.Root>
</TableView>
</StackLayout>C#：
categories = getCategories();
foreach (var category in categories)
{
var viewCell = new ViewCell
{
View = new StackLayout()
{
Padding = new Thickness(20, 0, 20, 0),
HorizontalOptions = LayoutOptions.FillAndExpand,
Children = {
new StackLayout() {
Orientation = StackOrientation.Horizontal,
VerticalOptions = LayoutOptions.CenterAndExpand,
Children = {
new StackLayout() {
HorizontalOptions = LayoutOptions.StartAndExpand,
Children = {
new Label { Text = category.Name}
},
new StackLayout() {
HorizontalOptions = LayoutOptions.EndAndExpand,
Orientation = StackOrientation.Horizontal,
Children = {
new Label { Text = category.Count},
new Image { Source = "right1.png",
IsVisible = category.Selected }
}
}
}
}
}
}
};
viewCell.Tapped += (sender, e) =>
{
if (category.Selected == false)
{
App.DB.UpdateSelected(true);
}
else
{
App.DB.UpdateSelected(false);
}
categories = getCategories();
totalPhraseCount = getTotalPhraseCount();
Title = totalPhraseCount.ToString() + " phrases";
};
tableSection.Add(viewCell);
}我想要做的是，每当我点击视图单元格更新所选属性时，表视图中的数据也会更新。在ListView中，我可以调用ItemSelected事件，然后使用更新后的类别再次调用ItemSource。使用TableView可以做到这一点吗？
回答 1
Stack Overflow用户
发布于 2016-12-24 13:52:38
请尝试以下操作
categories = getCategories();
foreach (var category in categories)
{
var viewCell = new ViewCell
{
View = new StackLayout()
{
Padding = new Thickness(20, 0, 20, 0),
HorizontalOptions = LayoutOptions.FillAndExpand,
Children = {
new StackLayout() {
Orientation = StackOrientation.Horizontal,
VerticalOptions = LayoutOptions.CenterAndExpand,
Children = {
new StackLayout() {
HorizontalOptions = LayoutOptions.StartAndExpand,
Children = {
new Label { Text = category.Name}
},
new StackLayout() {
HorizontalOptions = LayoutOptions.EndAndExpand,
Orientation = StackOrientation.Horizontal,
Children = {
new Label { Text = category.Count},
new Image { Source = "right1.png",
IsVisible = category.Selected }
}
}
}
}
}
}
};
viewCell.Tapped += (sender, e) =>
{
if (category.Selected == false)
{
App.DB.UpdateSelected(true);
}
else
{
App.DB.UpdateSelected(false);
}
categories = getCategories();
totalPhraseCount = getTotalPhraseCount();
Title = totalPhraseCount.ToString() + " phrases";
};
}
tableSection.Add(viewCell);
tableSection.ForceLayout();
// Or try tableview.Forcelayout();
// Or try parent_stacklayout.ForceLayout();页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/41277186
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