如何绘制堆栈面板的特定单元格？

Question

为了绘制单元矩阵，我使用了由以下代码定义的Stackpanel：

    int columns = Convert.ToInt32(columnasText.Text);
    int rows = Convert.ToInt32(filasText.Text);
    SolidColorBrush selected1 = new SolidColorBrush(Colors.Aquamarine);       
    SolidColorBrush released = new SolidColorBrush(Colors.White);


            for (int i = 0; i < rows; i++)
            {
                StackPanel stkPanel = new StackPanel();
                stkPanel.Orientation = Orientation.Horizontal;


                for (int j = 0; j < columns; j++)
                {
                    Label lbl = new Label();
                    lbl.Height = rejilla.Height / rows;
                    lbl.Width = rejilla.Width / columns;


                    lbl.Tag = new Point(i, j); 
                    lbl.BorderBrush = new SolidColorBrush(Colors.Black);
                    lbl.BorderThickness = new Thickness(1);                     
                    lbl.Background = released;                                                                                          
                    stkPanel.Children.Add(lbl);
                }

                rejilla.Children.Add(stkPanel);

一旦定义了，我需要根据每个单元格的值来更改每个单元格的颜色，而我无法做到这一点。

Answer 1

我使用了您的变量rejilla（我假设它是StackPanel或Grid）。无论哪种方式，它都可以工作。

方法1：

密钥正在使用 .Children.OfType（）

//Get your cell location
int rowIndex = 2;
int columnIndex = 8;

//Get your desired new color
SolidColorBrush selected1 = new SolidColorBrush(Colors.Aquamarine);

//Get list of your row panels
var stackPanels = rejilla.Children.OfType<StackPanel>().ToList();

//Check if desired row panel exist
if (rowIndex < stackPanels.Count && rowIndex >= 0)
{
    //Get list of your labels in the desired row panel
    var labels = stackPanels[rowIndex].Children.OfType<Label>().ToList();

    //Check if desired cell exist or not then change background
    if (columnIndex < labels.Count && columnIndex >= 0)
        labels[columnIndex].Background = selected1;
}

方法2：使用您设置的标记（点）

不推荐，如果将所有标签放置在一个堆栈面板中而不是将它们放置在多个堆栈面板中（每行一个堆栈面板），此方法将很有用。

//Get your cell location
int rowIndex = 2;
int columnIndex = 8;

//Get your desired new color
SolidColorBrush selected1 = new SolidColorBrush(Colors.Aquamarine);

//Get list of your row panels
var stackPanels = rejilla.Children.OfType<StackPanel>().ToList();

//Check if desired row panel exist
if (rowIndex < stackPanels.Count && rowIndex >= 0)
{
    //Get list of your labels in the desired row panel
    var label = stackPanels[rowIndex].Children.OfType<Label>()
        .Where(Item => (int)(Item.Tag as Nullable<Point>).GetValueOrDefault().X == rowIndex
        && (int)(Item.Tag as Nullable<Point>).GetValueOrDefault().Y == columnIndex).FirstOrDefault();

    if(label != null)
        label.Background = selected1;
}

您可以将代码放在方法中，并传递stackPanel，color，rowIndex，columnIndex：

private void SetCellColor(StackPanel stackPanel, SolidColorBrush color, int rowIndex, int columnIndex)
{
    //Get list of your row panels
    var stackPanels = stackPanel.Children.OfType<StackPanel>().ToList();

    //Check if desired row panel exist
    if (rowIndex < stackPanels.Count && rowIndex >= 0)
    {
        //Get list of your labels in the desired row panel
        var labels = stackPanels[rowIndex].Children.OfType<Label>().ToList();

        //Check if desired cell exist or not then change background
        if (columnIndex < labels.Count && columnIndex >= 0)
            labels[columnIndex].Background = color;
    }
}

然后称呼它：

SetCellColor(rejilla, new SolidColorBrush(Colors.Aquamarine), rowIndex, columnIndex);

祝你好运！