WPF前台xaml中的控件名在后台拿不到，后台代码中显示“当前上下文不存在名称‘xxx’”
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在前台页面有个文本框控件，<TextBox x:Name="txtFolder" Width="115" MaxLength="256"/>，后台代码txtFolder显示当前上下文不存在名称“txtFolder”
如果这个textbox是一个页面上的控件，应该是可以在后台直接获得的。你可以重新编译下工程项目就行了。如果这个textbox是在某个控件的template里的话，后台是不能直接获取的，但你可以通过视觉树的方式获取，网上有相关资料可以查阅借鉴。 参考技术A Name改成：<TextBox Name="txtFolder" Width="115" MaxLength="256"/> 参考技术B TextBox textBox1 = new TextBox();
textBox1.Text = "";
foreach (var item in XML.lists)
textBox1.Text = textBox1.Text + item + "\r\n";//用了MVVM模式之后，不能直接用前台的控件name属性
C# WPF从后台代码生成行列可变的表格
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
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