WPF C＃datagrid修复视图行（修复滚动） [英] WPF C# datagrid fix view row (fix scroll)

问题描述

我正在使用WPF数据网格，并希望在顶部插入行后修复视图，每当在顶视图中插入行向下滚动1行时，我使用以下代码

i am working on WPF datagrid and want to fix view after insert row at top, whenever row insert at top view scroll down by 1 row, i am using following code

int i = 0;
DataTable dt = null;

private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
    dt = new DataTable();
    dt.Columns.Add("Col1");
    dt.Columns.Add("Col2");

    DispatcherTimer dtimer = new DispatcherTimer();
    dtimer.Tick += new EventHandler(dt_Tick);
    dtimer.Interval = new TimeSpan(0, 0, 1);
    dtimer.Start();
    dataGrid1.DataContext = dt;


}
void dt_Tick(object sender, EventArgs e)
{
    DataRow dr;
    dr = dt.NewRow();
    dr["Col1"] = i;
    dr["Col2"] = i;
    dt.Rows.InsertAt(dr, 0);
    i++;
}

我试图使用dataGrid1.ScrollIntoView（dataGrid1.SelectedItem）;但它仍然需要选择项目，甚至它向下滚动到最后一行视图



我可以设法在Windows格式的DataGridView中以下列方式执行相同操作/>

i tried to use dataGrid1.ScrollIntoView(dataGrid1.SelectedItem); but it still need selected item, and even it scroll down till last row in view

I can manage to do the same in DataGridView of windows form in following way

DataGridViewCell cell = dataGridView1.FirstDisplayedCell;
dt.Rows.InsertAt(dr, 0);
dataGridView1.FirstDisplayedCell = cell;

寻找在WPF中执行此操作的任何类似方法



谢谢。

looking for any similar ways to do this in WPF also

Thanks.

推荐答案

那么是什么阻止你插入对所选项目进行排序和/或使用创建的行来调用 ScrollIntoView ？



所以它应该足够了写：

Hi,

so what''s preventing you from making the inserted row either the selected item and/or using the created row to call ScrollIntoView?

So it should be enough to write:

void dt_Tick(object sender, EventArgs e)
{
   DataRow dr;
   dr = dt.NewRow();
   dr["Col1"] = i;
   dr["Col2"] = i; 
   dt.Rows.InsertAt(dr, 0);
   i++;

   // either do a scroll to inserted row
   dataGrid1.ScrollIntoView(dr);

   // or select item
   // dataGrid1.SelectedItem = dr;
   

   // and then scroll selected item into view
   // dataGrid1.ScrollIntoView(dataGrid1.SelectedItem);
}

希望这会有所帮助。

Hope this helps.

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