![](/img/trans.png)
[英]How to access controls in Main Master page from content page in Nested Master Page
[英]Access controls from view in content page
參考我之前的問題 ,我有3個觀點 我這里有一個輸入字段說名稱,我有一個保存工具欄按鈕。 保存圖標放在我的內容頁面上,而輸入字段在我的視圖中。 點擊保存后,我想將文本框中的數據保存到XML文件中。 由於我的保存點擊事件位於我的內容頁面中,因此無法從我的視圖中輸入文本。
這是代碼片段:
查看頁面:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection.Emit;
using System.Text;
using Xamarin.Forms;
namespace ____
{
public class View1 : ContentView
{
public static Entry txtName;
public View1()
{
//Name
Label lblName = new Label { Text = "Name", FontAttributes = FontAttributes.Bold, Style = (Style)Application.Current.Resources["LabelStyle"] };
txtName = new Entry { Style = (Style)Application.Current.Resources["entryStyle"] };
StackLayout stName = new StackLayout
{
Padding = new Thickness(10, 0, 10, 0),
Children ={
lblName,
txtName
}
};
var scrollview = new ScrollView
{
Content = new StackLayout
{
Padding = new Thickness(0, 20, 0, 20),
//VerticalOptions = LayoutOptions.StartAndExpand,
Children = {stName
}
}
};
Content = new StackLayout
{
Padding = new Thickness(0, 20, 0, 20),
VerticalOptions = LayoutOptions.StartAndExpand,
Children =
{
scrollview
}
};
}
}
}
內容頁:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection.Emit;
using System.Text;
using Xamarin.Forms;
namespace ___
{
public class Page1 : ContentPage
{
Button btnDetails, btnN, btnT;
View1 myview1, myview2, myview3;
public Page1()
{
//Primary Items
ToolbarItem Save = new ToolbarItem();
Save.Text = "Save";
Save.Clicked += OnClick_Save;
Save.Order = ToolbarItemOrder.Primary;
Save.Icon = Device.OnPlatform("Icons/save.png", "save.png", "Toolkit.Content/save.png");
ToolbarItem Cancel = new ToolbarItem();
Cancel.Text = "Cancel";
//Cancel.Clicked += OnClick_Cancel;
Cancel.Order = ToolbarItemOrder.Primary;
Cancel.Icon = Device.OnPlatform("Icons/cancel.png", "cancel.png", "Images/cancel.png");
ToolbarItems.Add(Cancel);
ToolbarItems.Add(Save);
StackLayout stHeader = new StackLayout
{
Children = {
new Label {
Text= "--------", FontAttributes=FontAttributes.Bold, FontSize=25, TextColor=Color.FromHex("#2C3E50")
}
},
HorizontalOptions = LayoutOptions.FillAndExpand,
Padding = new Thickness(10, 0, 0, 10)
};
btnDetails = new Button { Text = "Details", HorizontalOptions = LayoutOptions.FillAndExpand };
btnN = new Button { Text = "---", HorizontalOptions = LayoutOptions.FillAndExpand };
btnT = new Button { Text = "---", HorizontalOptions = LayoutOptions.FillAndExpand };
Grid objGrid = new Grid();
objGrid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });
objGrid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });
objGrid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
//objGrid.RowDefinitions.Add( new RowDefinition { Height = GridLength.Auto });
//
objGrid.ColumnDefinitions.Add(new ColumnDefinition
{
Width = new GridLength(1, GridUnitType.Star)
});
objGrid.ColumnDefinitions.Add(new ColumnDefinition
{
Width = new GridLength(1, GridUnitType.Star)
});
objGrid.ColumnDefinitions.Add(new ColumnDefinition
{
Width = new GridLength(1, GridUnitType.Star)
});
objGrid.Children.Add(stHeader, 0, 0);
Grid.SetColumnSpan(stHeader, 3);
btnDetails.Clicked += ButtonClicked;
objGrid.Children.Add(btnDetails, 0, 1);//col, row
btnN.Clicked += ButtonClicked;
objGrid.Children.Add(btnN, 1, 1);
//btn3 = new Button { Text = "3" };
btnT.Clicked += ButtonClicked;
objGrid.Children.Add(btnT, 2, 1);
myview1 = new View1();
myview2 = new View1();
myview3 = new View1();
objGrid.Children.Add(myview1, 0, 2);
objGrid.Children.Add(myview2, 0, 2);
objGrid.Children.Add(myview3, 0, 2);
Grid.SetColumnSpan(myview1, 3);
Grid.SetColumnSpan(myview2, 3);
Grid.SetColumnSpan(myview3, 3);
Content = objGrid;
SelectButton(btnDetails);
}
private void OnClick_Save(object sender, EventArgs e)
{
var s = View1.txtName.Text;
}
void SelectButton(Button button)
{
View1 view = null;
if (button == btnDetails)
view = myview1;
if (button == btnN)
view = myview2;
if (button == btnT)
view = myview3;
myview1.IsVisible = myview1 == view;
myview2.IsVisible = myview2 == view;
myview3.IsVisible = myview3 == view;
btnDetails.TextColor = (btnDetails == button) ? Color.Accent.AddLuminosity(0.18) : (Color)Button.TextColorProperty.DefaultValue;
btnN.TextColor = (btnN == button) ? Color.Accent.AddLuminosity(0.18) : (Color)Button.TextColorProperty.DefaultValue;
btnT.TextColor = (btnT == button) ? Color.Accent.AddLuminosity(0.18) : (Color)Button.TextColorProperty.DefaultValue;
btnDetails.BackgroundColor = (btnDetails == button) ? Color.Silver.AddLuminosity(0.18) : Color.Silver.AddLuminosity(0.1);
btnN.BackgroundColor = (btnN == button) ? Color.Silver.AddLuminosity(0.18) : Color.Silver.AddLuminosity(0.1);
btnT.BackgroundColor = (btnT == button) ? Color.Silver.AddLuminosity(0.18) : Color.Silver.AddLuminosity(0.1);
}
void ButtonClicked(object sender, EventArgs e)
{
SelectButton((Button)sender);
}
}
}
如何在我的內容頁面保存按鈕單擊中輸入文本框值?
您可以嘗試將Entry控件公開為View1示例的屬性:public Entry TextName {get {return txtName; }}
您的頁面可能會訪問此頁:
string value = myView1.TextName.Text
使用實例成員引用而不是靜態引用:
View1
類中,更改public static Entry txtName;
to public Entry txtName;
。 View1 _currentView;
到Page1
類。 SelectButton()
方法的最后,添加_currentView = view;
。 OnClick_Save()
,更改var s = View1.txtName.Text;
to var s = _currentView.txtName.Text;
。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.