z概述 WPF常用的表格控件是DataGrid，这个控件在前台XAML编写的话，一般列已经固定，然后给每个列去绑定数据，但是如果我的列不固定，随着运算结果变动呢？这时候DataGrid，就比较难实现这个需求，这节我就从后台代码去添加控件去实现这个功能. 效果演示
实现方法-. 前台XAML:
<dxlc:LayoutControl>
<Grid HorizontalAlignment="Left" VerticalAlignment="Top" cal:Message.Attach="[Event Loaded]=[Grid_Loaded($source,$eventArgs)]" />
</dxlc:LayoutControl>
这里我把grid放到了dxlc:LayoutControl中，这样可以实现grid尺寸超出界面分配的长宽时，横纵出现滑动条：如下图
-.后台代码： 数据模型： public class WidthMetrologyDTO { /// <summary> /// /// </summary> public bool IsMeasureSuccess { get; set; }
/// <summary> /// /// </summary> public double Degree { get; set; }
/// <summary> /// /// </summary> public string ImageFilePath { get; set; }
/// <summary> /// /// </summary> public double Width { get; set; }
public double EdgeNum { get; set; }
public List<EdgePosition> EdgePositions { get; set; } }
public class EdgePosition { public double EdgesAmplitude { get; set; } }
①定义grid以及数据集合： public Grid resultDisplayGrid; public BindableCollection<WidthMetrologyDTO> WidthMetrologyData { get; set; } = new BindableCollection<WidthMetrologyDTO>();
②控件加载时获取grid对象：
public void Grid_Loaded(object sender, RoutedEventArgs e) { resultDisplayGrid = (Grid)sender; }
③添加数据集合：
public void ResultDispaly() { try { WidthMetrologyData.Clear(); WidthMetrologyData.Add(new WidthMetrologyDTO { Width = 345.1, EdgeNum = 3, EdgePositions = new List<EdgePosition> { new EdgePosition(){EdgesAmplitude = 1.1}, new EdgePosition(){EdgesAmplitude = 2.2}, new EdgePosition(){EdgesAmplitude = 3.3}, }, }); WidthMetrologyData.Add(new WidthMetrologyDTO { Width = 345.2, EdgeNum = 2, EdgePositions = new List<EdgePosition> { new EdgePosition(){EdgesAmplitude = 4.4}, new EdgePosition(){EdgesAmplitude = 5.5}, }, }); WidthMetrologyData.Add(new WidthMetrologyDTO { Width = 345.3, EdgeNum = 4, EdgePositions = new List<EdgePosition> { new EdgePosition(){EdgesAmplitude = 6.6}, new EdgePosition(){EdgesAmplitude = 7.7}, new EdgePosition(){EdgesAmplitude = 8.8}, new EdgePosition(){EdgesAmplitude = 9.9}, }, }); WidthMetrologyData.Add(new WidthMetrologyDTO { Width = 345.0, EdgeNum = 1, EdgePositions = new List<EdgePosition> { new EdgePosition(){EdgesAmplitude = 0.66}, }, }); AddResultGrid(); } catch (Exception ex) { //logger.Debug($"ResultData add fail : {ex}"); } }
④数据表格生成
public void AddResultGrid() { try { resultDisplayGrid.Children.Clear(); var gridColumns = 2 + WidthMetrologyData.OrderByDescending(index => index.EdgePositions.Count).FirstOrDefault().EdgePositions.Count; var gridRows = 16;
//添加grid行 for (int i = 0; i < gridColumns; i++) { var columnDefinition = new ColumnDefinition(); resultDisplayGrid.ColumnDefinitions.Add(columnDefinition); if (i == 1) { columnDefinition.Width = new GridLength(2, GridUnitType.Star);//相对尺寸 } else { columnDefinition.Width = new GridLength(1, GridUnitType.Star); } //columnDefinition.Width = GridLength.Auto; } //添加grid列 for (int i = 0; i < gridRows; i++) { var rowDefinition = new RowDefinition(); resultDisplayGrid.RowDefinitions.Add(rowDefinition); rowDefinition.Height = new GridLength(30, GridUnitType.Pixel);//绝对尺寸 }
//添加数据 //var controlWidth = 100; //var controlHeight = 30; for (int degreeIndex = 0; degreeIndex < WidthMetrologyData.Count; degreeIndex++) { var rowsCount = 3; var columnsCount = WidthMetrologyData[degreeIndex].EdgePositions.Count; for (int row = 0; row < rowsCount; row++) for (int column = 0; column < columnsCount + 2; column++) { TextBlock tb = new TextBlock(); //tb.Width = controlWidth; //tb.Height = controlHeight; //tb.HorizontalAlignment = HorizontalAlignment.Left; //tb.VerticalAlignment = VerticalAlignment.Center;
Border border = new Border(); border.BorderBrush = System.Windows.Media.Brushes.BlueViolet; border.BorderThickness = new Thickness(1);
border.Child = tb; border.SetValue(Grid.RowProperty, row + degreeIndex * 4); border.SetValue(Grid.ColumnProperty, column); resultDisplayGrid.Children.Add(border);
if (row == 0 && column >= 2) { tb.Text = (column - 1).ToString(); } else if (row == 1 && column >= 2) { tb.Text = WidthMetrologyData[degreeIndex].EdgePositions[column - 2].EdgesAmplitude.ToString(); } else if (row == 2 && column >= 2) { if (column == 2) { tb.Text = WidthMetrologyData[degreeIndex].Width.ToString(); //tb.Width = columnsCount * controlWidth; tb.SetValue(Grid.ColumnSpanProperty, columnsCount); } else { continue; } }
if (column == 0) { if (row == 0) { switch (degreeIndex) { case 0: tb.Text = "第一组"; break; case 1: tb.Text = "第二组"; break; case 2: tb.Text = "第三组"; break; case 3: tb.Text = "第四组"; break; default: break; } //tb.Height = 3 * controlHeight; tb.SetValue(Grid.RowSpanProperty, 3); } else { continue; } }
if (column == 1) { switch (row) { case 0: tb.Text = "ID"; break; case 1: tb.Text = "Value"; break; case 2: tb.Text = "Fraction"; break; default: tb.Text = string.Empty; break; } //tb.Width = controlWidth; }
} }
resultDisplayGrid.Width = (gridColumns + 1)* 40; //resultDisplayGrid.Height = gridRows * controlHeight; } catch (Exception ex) { //logger.Error($"Add result grid fail,{ex}"); } }
解释：
-. grid添加行以及尺寸设置：ridUnitType.Pixel代表绝对尺寸，GridUnitType.Star相对尺寸 var rowDefinition = new RowDefinition(); resultDisplayGrid.RowDefinitions.Add(rowDefinition); rowDefinition.Height = new GridLength(30, GridUnitType.Pixel);//绝对尺寸
自动尺寸：
columnDefinition.Width = GridLength.Auto;
-. link的使用：按照集合中EdgePositions数量降序排列后获取第一个列表值
WidthMetrologyData.OrderByDescending(index => index.EdgePositions.Count).FirstOrDefault().EdgePositions.Count;
-.生成控件并添加到grid中，并通过SetValue设置控件在grid中的行列位置
TextBlock tb = new TextBlock(); //tb.Width = controlWidth; //tb.Height = controlHeight; //tb.HorizontalAlignment = HorizontalAlignment.Left; //tb.VerticalAlignment = VerticalAlignment.Center;
Border border = new Border(); border.BorderBrush = System.Windows.Media.Brushes.BlueViolet; border.BorderThickness = new Thickness(1);
border.Child = tb; border.SetValue(Grid.RowProperty, row + degreeIndex * 4); border.SetValue(Grid.ColumnProperty, column); resultDisplayGrid.Children.Add(border);
源码链接：https://pan.baidu.com/s/1mgzyTRVwvq1XpJ6y0iyVww 提取码：6666
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