C# WPF DataGrid 获取行

Question

I have a C# WPF project and I use a DataGrid (not DataGridView)

I need to get a row from the DataGrid using

myGrid.ItemContainerGenerator.ContainerFromItem

My problem is that the result is always null - even though there are rows(items) and columns in the grid.

Here is what I can see in Debugger output:

myGrid.Items.Count
16

myGrid.Items[0]
{Certificate.Gasbottle}
    BottleNr: "******"
    BottleNrVariable: "$BottlenumberCO2CH4H2S"
    Gasname: "CO2/CH4/H2S"
    
myGrid.Items[1]
{Certificate.Gasbottle}
    BottleNr: "75436"
    BottleNrVariable: "$BottlenumberCO"
    Gasname: " CO"

Problem:    
(DataGridRow)myGrid.ItemContainerGenerator.ContainerFromItem(myGrid.Items[1]);
null      <--- why null? myGrid.Items[1] does exist... (I also get this for all other items)

I also get null if I use FromIndex instead of FromItem:

DataGridRow row  = myGrid.ItemContainerGenerator.ContainerFromIndex(1)

Answer 1

You can get the rows as follows:

var itemsSource = myGrid.ItemsSource as IEnumerable;
    
if (itemsSource != null)
{
   foreach (var item in itemsSource)
   {
       DataGridRow row = myGrid.ItemContainerGenerator.ContainerFromItem(item) as DataGridRow;
    
   }
}

To get a specific row,

var itemsSource = dataGrid.ItemsSource as IList;
    
if (itemsSource != null && itemsSource.Count > 1)
{
   var item = itemsSource[1];
   DataGridRow row = dataGrid.ItemContainerGenerator.ContainerFromItem(item) as DataGridRow;
    
}