无法使用 Python 填充 WPF DataGrid

Question

我在使用 Python.NET 将数据绑定到 WPF DataGrid 时遇到问题

代码如下所示，我尝试了三种不同的方法来绑定数据 - 每种方法都失败了，错误消息作为注释包含在下面的代码中

如果我不尝试添加数据，则 datagarid 会正确显示标题。但我无法用任何数据填充网格。

任何帮助将不胜感激！！！

道格

import clr

#.NET references
import System
import System.Windows.Controls as WPFControls
import System.Windows.Data as WPFBindings


def getCustomToolPropertyContent():

   #Create a Grid
   my_Grid = WPFControls.Grid()

   #Add 1 Row and One Column
   my_Grid.RowDefinitions.Add(WPFControls.RowDefinition())
   my_Grid.ColumnDefinitions.Add(WPFControls.ColumnDefinition())

   # Create a DataGrid
   myDataGrid = WPFControls.DataGrid()

   #Create three columns
   column_1 = WPFControls.DataGridTextColumn()
   column_1.Header = "ID"
   column_1.Binding = WPFBindings.Binding("id")

   column_2 = WPFControls.DataGridTextColumn()
   column_2.Header = "Title"
   column_2.Binding = WPFBindings.Binding("title")

   column_3 = WPFControls.DataGridTextColumn()
   column_3.Header = "Content"
   column_3.Binding = WPFBindings.Binding("content")

   #Add the three columns to the datagrid
   myDataGrid.Columns.Add(column_1)
   myDataGrid.Columns.Add(column_2)
   myDataGrid.Columns.Add(column_3)

# Data table approach....  
# Fails with
#  AttributeError : DataTable

   #Create a DataTable
   data_table = WPFBindings.DataTable("MyDataTable")
   data_table.Columns.Add("id")
   data_table.Columns.Add("title")
   data_table.Columns.Add("content")

   #Add data 
   data_table.Rows.Add("Andre", "Piratas", "1973")
   data_table.Rows.Add("Andres", "Piratass", "1973s")

   #DataTable to DataGrid
   myDataGrid.DataContext = data_table.DefaultView   


# Item Source Approach   
# Fails with 
#  TypeError: 'list' value cannot be converted to System.Collections.IEnumerable  
#   items = []

#   items.append(Student(id="1", title="Piratas", content="1973"))
#   items.append(Student(id="2", title="XXXX", content="1974"))  

#   myDataGrid.ItemsSource = items


# Items.Add approach
# Fails with 
#  TypeError: No method matches given arguments

#   myDataGrid.Items.Add(Student(id="1", title="Piratas", content="1973"))  



   # Position the DataGrid in the first row, column of the Grid
   WPFControls.Grid.SetRow(myDataGrid, 0)
   WPFControls.Grid.SetColumn(myDataGrid, 0)

   #Add the DataGrid to the Grid 
   my_Grid.Children.Add(myDataGrid)


   # Return the Grid   
   return my_Grid

Answer 1

好的，

我明白了 - 我对 DataTable 的导入有误。 改变了

"import System.Windows.Data as WPFBindings"

到

"import System.Data as WPFData"

然后听从了哈马斯的建议，改变了，

"myDataGrid.DataContext = data_table.DefaultView" 

到

myDataGrid.ItemsSource= data_table.DefaultView 

感谢哈马斯！！

Answer 2

为了完整起见，这里是工作代码。 请注意，通过使用 DataTable，我能够删除所有手动列、标题和绑定设置

import clr

#.NET references
import System.Windows.Controls as WPFControls
import System.Data as WPFData

def getCustomToolPropertyContent():

   #Create a Grid
   my_Grid = WPFControls.Grid()

   #Add 1 Row and One Column
   my_Grid.RowDefinitions.Add(WPFControls.RowDefinition())
   my_Grid.ColumnDefinitions.Add(WPFControls.ColumnDefinition())

   # Create a DataGrid
   myDataGrid = WPFControls.DataGrid()

# Data table approach....  
   #Create a DataTable
   data_table = WPFData.DataTable("MyDataTable")
   data_table.Columns.Add("ID")
   data_table.Columns.Add("Title")
   data_table.Columns.Add("Content")

   #Add data 
   data_table.Rows.Add("Andre", "Piratas", "1973")
   data_table.Rows.Add("Andres", "Piratass", "1973s")

   myDataGrid.ItemsSource = data_table.DefaultView     

   # Position the DataGrid in the first row, column of the Grid
   WPFControls.Grid.SetRow(myDataGrid, 0)
   WPFControls.Grid.SetColumn(myDataGrid, 0)

   #Add the DataGrid to the Grid 
   my_Grid.Children.Add(myDataGrid)

   # Return the Grid   
   return my_Grid

Answer 3

我没有看到你创建 data_Table 实例。

DataTable data_table = CreateDataTable();

另外试试这个！

myDataGrid.ItemsSource = data_table.DefaultView;

在 XAML 中

<DataGrid Name="myDataGrid" ItemsSource="{Binding}">