如何知道网格上复选框的已选中/未选中状态？ [英] How can I know the checked/unckecked status of the checkboxes on the grid?

问题描述

我使用以下代码段通过添加列构造了 DataGrid ：

  var check = new FrameworkElementFactory（typeof（CheckBox），chkBxDetail）; 
 dgDetalle.Columns.Add（new DataGridTemplateColumn（）{CellTemplate = 
 new DataTemplate（）{VisualTree = check}}）; 
 for（int i = 0; i <4; i ++）
 {
 DataGridTextColumn textColumn = new DataGridTextColumn（）; 
 textColumn.Binding = new Binding（string.Format（[{0}]，i））; 
 dgDetalle.Columns.Add（textColumn）; 
} 
  

如何知道网格上复选框的已选中/未选中状态？

UPDATE
I 不能使用绑定

我创建了 DataGrid 使用此代码片段：

  var check = new FrameworkElementFactory（typeof（CheckBox））; 
 
 dgDetalle.Columns.Add（new DataGridTemplateColumn（）
 {
 CellTemplate = new DataTemplate（）{VisualTree = check} 
}）; 
 
 for（int i = 0; i <4; i ++）
 {
 DataGridTextColumn textColumn = new DataGridTextColumn（）; 
 textColumn.Binding = new Binding（string.Format（[{0}]，i））; 
 dgDetalle.Columns.Add（textColumn）; 
} 
  

然后，我做了一个代码段， c $ c> MessageBox ：

  string testValues =; 
 
 for（int i = 0; i  {
 DataGridRow row =（DataGridRow）dgDetalle.ItemContainerGenerator.ContainerFromIndex 
 FrameworkElement cellContent = dgDetalle.Columns [0] .GetCellContent（row）; 
 CheckBox checkBox = VisualTreeHelper.GetChild（cellContent，0）as CheckBox; 
 if（checkBox！= null&&（checkBox.IsChecked？false））
 {
 List< string> item =（List< String>）dgDetalle.Items [i]; 
 foreach（var t in item）
 {
 testValues + = t; 
} 
} 
} 
 
 MessageBox.Show（testValues）; 
  

总结：

1. 使用 ItemContainerGenerator 获取该行


2. 从 DataGrid 并将其作为通用展示对象（ FrameworkElement ）


3. 使用 VisualTreeHelper 。请注意，我已经在第一个代码段创建了 CheckBox


4. 处理所选项

希望它帮助任何人...！

I've constructed a DataGrid by adding columns programatically using the following snippet:

var check = new FrameworkElementFactory(typeof(CheckBox), "chkBxDetail");
dgDetalle.Columns.Add(new DataGridTemplateColumn() { CellTemplate = 
                      new DataTemplate() { VisualTree = check } });
for (int i = 0; i < 4; i++)
{
    DataGridTextColumn textColumn = new DataGridTextColumn();
    textColumn.Binding = new Binding(string.Format("[{0}]", i));
    dgDetalle.Columns.Add(textColumn);
}

How can I know the checked/unckecked status of the checkboxes on the grid?

UPDATE I can't use binding

解决方案

Finally I got it...

I created the DataGrid using this snippet:

var check = new FrameworkElementFactory(typeof(CheckBox));

dgDetalle.Columns.Add(new DataGridTemplateColumn()
    {
        CellTemplate = new DataTemplate() { VisualTree = check }
    });

for (int i = 0; i < 4; i++)
{
    DataGridTextColumn textColumn = new DataGridTextColumn();
    textColumn.Binding = new Binding(string.Format("[{0}]", i));
    dgDetalle.Columns.Add(textColumn);
}

Then, I made a snippet to show data from selected items in a MessageBox:

string testValues = "";

for (int i = 0; i < dgDetalle.Items.Count; i++)
{
    DataGridRow row = (DataGridRow)dgDetalle.ItemContainerGenerator.ContainerFromIndex(i);
    FrameworkElement cellContent = dgDetalle.Columns[0].GetCellContent(row);
    CheckBox checkBox = VisualTreeHelper.GetChild(cellContent, 0) as CheckBox;
    if (checkBox != null && (checkBox.IsChecked ?? false))
    {
        List<string> item = (List<string>)dgDetalle.Items[i];
        foreach (var t in item)
        {
            testValues += t;
        }
    }
}

MessageBox.Show(testValues);

To summarize:

1. Get the row using ItemContainerGenerator
2. Get the specific column from the DataGrid and take it as a generic presentation object (FrameworkElement)
3. Get the content using VisualTreeHelper. Notice that I got the CheckBox I've created on the first snippet
4. Process the selected item

Hope it helps anyone...!

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