DatagridView选择最后一行 [英] DatagridView Select last row

问题描述

在设置所选datagridview的最后一行时遇到一些麻烦。我以这种方式选择最后一行：

I have some trouble with setting the last row in my datagridview selected. I select the last row this way:

if (grid.Rows.Count > 0)
{
    try
    {
        grid.Rows[grid.Rows.Count - 1].Selected = true;
        grid.CurrentCell = grid.Rows[grid.Rows.Count - 1].Cells[1]
    }
    catch (IndexOutOfRangeException)
    { }
    catch (ArgumentOutOfRangeException)
    { }
}

执行此代码时，异常： IndexOutOfRangeException发生：Index-1没有值。

When I execute this code I get an exception: IndexOutOfRangeException occurred: Index-1 does not have a value.

当我调试<$ c $时c>行集合和相应的 Cells 集合，我看到两个集合都已填满。该行索引也存在于行和单元格集合中。

When I debug the Rowscollection and the corresponding Cells collection I see both collections are filled. The index also exists of the Rows and Cells collection.

我不知道我在这里做错了什么。有人可以在这里帮助我吗？ Thnx

I have no clue what I am doing wrong here. Someone who can help me out here? Thnx

编辑：

这是一个完整的例外：

System.IndexOutOfRangeException: Index -1 does not have a value.
at System.Windows.Forms.CurrencyManager.get_Item(Int32 index)
at System.Windows.Forms.CurrencyManager.get_Current()
at System.Windows.Forms.DataGridView.DataGridViewDataConnection.OnRowEnter(DataGridViewCellEventArgs e)
at System.Windows.Forms.DataGridView.OnRowEnter(DataGridViewCell& dataGridViewCell, Int32 columnIndex, Int32 rowIndex, Boolean canCreateNewRow, Boolean validationFailureOccurred)
at System.Windows.Forms.DataGridView.SetCurrentCellAddressCore(Int32 columnIndex, Int32 rowIndex, Boolean setAnchorCellAddress, Boolean validateCurrentCell, Boolean throughMouseClick)
at System.Windows.Forms.DataGridView.set_CurrentCell(DataGridViewCell value)

推荐答案

尝试：

dataGridView1.ClearSelection();//If you want

int nRowIndex = dataGridView1.Rows.Count - 1;
int nColumnIndex = 3;

dataGridView1.Rows[nRowIndex].Selected = true;
dataGridView1.Rows[nRowIndex].Cells[nColumnIndex].Selected = true;

//In case if you want to scroll down as well.
dataGridView1.FirstDisplayedScrollingRowIndex = nRowIndex;

在输出后提供提示 ：（最后一行，滚动并选中）

Gives following output: (Last row, scrolled and selected)

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