如何在WPF C＃中进行数据绑定（从combox中选择） [英] How do data binding in WPF C# ( select from combox )
问题描述
如何在Wpf C中进行装订＃
我要做绑定
当选择项目时形成组合框（项目顶部，底部，左侧，右侧）
我有6个文本框来更新值（最小和最大显示）但它没有更新。
需要一些帮助..
提前致谢..
我尝试过：
公共部分课TeachMenu：Page
{
private ObservableCollection< parampos> Param;
public TeachMenu（）
{
InitializeComponent（）;
Param1 =新ObservableCollection< posparam>（）
{
新PosParam（）{R_min = 1，R_max = 255，G_min = 1，G_max = 255，B_min = 1，B_max = 255}，
新PosParam（）{R_min = 2，R_max = 255，G_min = 2，G_max = 255，B_min = 2，B_max = 255}，
新PosParam（）{R_min = 3，R_max = 255，G_min = 3，G_max = 255，B_min = 3，B_max = 255}，
new PosParam（）{R_min = 4，R_max = 255，G_min = 4，G_max = 255，B_min = 4，B_max = 255}
};
TabPositioning.DataContext = Param;
}
公共类Param
{
public int R_min {get => r_min; set => r_min = value; }
public int R_max {get => r_max时; set => r_max =值; }
public int G_min {get =>将G_min; set => g_min = value; }
public int G_max {get => g_max; set => g_max =值; }
public int B_min {get => b_min; set => b_min = value; }
public int B_max {get => b_max; set => b_max =值; }
public double Row1 {get => ROW1; set => row1 = value; }
public double Col1 {get => COL1; set => col1 =值; }
public double Row2 {get => 2行; set => row2 = value; }
public double Col2 {get => COL2; set => col2 =值; }
public enum PosFrame
{
Frame，
Top，
底部，
剩下，
正确
}
private int r_min;
private int r_max;
private int g_min;
private int g_max;
private int b_min;
private int b_max;
private double row1;
private double col1;
private double row2;
private double col2;
}
How to do binding in Wpf C#
I tring to do binding
when select item form combobox( Item Top,Bottom,Left,Right)
I have 6 text box to update value (min and max display) but its not updating.
Need some one help..
Thanks in advance..
What I have tried:
public partial class TeachMenu : Page
{
private ObservableCollection<parampos> Param;
public TeachMenu()
{
InitializeComponent();
Param1 = new ObservableCollection<posparam>()
{
new PosParam() { R_min = 1, R_max = 255, G_min = 1, G_max = 255, B_min = 1, B_max = 255 },
new PosParam() { R_min = 2, R_max = 255, G_min = 2, G_max = 255, B_min = 2, B_max = 255 },
new PosParam() { R_min = 3, R_max = 255, G_min = 3, G_max = 255, B_min = 3, B_max = 255 },
new PosParam() { R_min = 4, R_max = 255, G_min = 4, G_max = 255, B_min = 4, B_max = 255 }
};
TabPositioning.DataContext = Param;
}
public class Param
{
public int R_min { get => r_min; set => r_min = value; }
public int R_max { get => r_max; set => r_max = value; }
public int G_min { get => g_min; set => g_min = value; }
public int G_max { get => g_max; set => g_max = value; }
public int B_min { get => b_min; set => b_min = value; }
public int B_max { get => b_max; set => b_max = value; }
public double Row1 { get => row1; set => row1 = value; }
public double Col1 { get => col1; set => col1 = value; }
public double Row2 { get => row2; set => row2 = value; }
public double Col2 { get => col2; set => col2 = value; }
public enum PosFrame
{
Frame,
Top,
Bottom,
Left,
Right
}
private int r_min;
private int r_max;
private int g_min;
private int g_max;
private int b_min;
private int b_max;
private double row1;
private double col1;
private double row2;
private double col2;
}
推荐答案
Binding适用于属性，而不是字段。所以更改：
Binding works with Properties, not Fields. So change:
private ObservableCollection<parampos> Param;
with
with
public ObservableCollection<parampos> Param {get; set;}
此外，清除 ObservableCollection ，始终使用 Clear（）方法，而不是
Also, to clear an ObservableCollection, always use the Clear() method and not
new ObservableCollection<...>();作为后者打破绑定。
您可以在此处阅读更多相关信息：数据绑定（WPF）| Microsoft Docs [ ^ ]
as the latter with break the binding.
You can read more about this here: Data Binding (WPF) | Microsoft Docs[^]
我附加了代码..当选择组合框项目.. 。滑块和文本框值应该改变。谢谢你的帮助..
Binding - Google Drive [ ^ ]
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