要实现这一目标随着 ClearSelection ，你将需要设置多了一个属性。

在此尝试的 DataBindingComplete

  dataGridView1.ClearSelection（）;
dataGridView1.CurrentCell = NULL;
 

修改的

根据您的意见

您可以修改code为

 如果（e.Key code == Keys.Up和放大器;＆安培; dataGridView1.CurrentCell.RowIndex == 0）
{
     this.ActiveControl = textBoxPartySearch;
     dataGridView1.Refresh（）;
     dataGridView1.ClearSelection（）;
     dataGridView1.CurrentCell = NULL;
     e.Handled =真实;
}
 

When I fill a DataGridView row by row (calling it's add function), the top row gets blue colored. It's not selected because I tried ClearSelection() also but it didnt work. It's giving the wrong illusion that the first row is selected.

How to get rid of it?

 void FillDGV()
    {
        dataGridViewParties.Rows.Clear();
        for (int i = 0; i < dataGridViewParties.Columns.Count; i++)
        {
            dataGridViewParties.Columns[i].Width = this.Width / dataGridViewParties.Columns.Count;
        }


        DataTable partyTbl = UtilityClass.GetDataTable(@"SELECT [PartyID]
                                                        ,[PartyName]
                                                        ,[PartyAddress]
                                                        ,[PartyState]
                                                        ,[PartyCity]
                                                        ,[PartyPhone]
                                                        FROM [VegiManager].[dbo].[Parties]
                                                        WHERE [PartyName] LIKE '" + textBoxPartySearch.Text + "%' ");
        foreach (DataRow dr in partyTbl.Rows)
        {
            dataGridViewParties.Rows.Add(1);

            dataGridViewParties.Rows[dataGridViewParties.Rows.Count - 1].Cells[0].Value = dr["PartyID"].ToString();
            dataGridViewParties.Rows[dataGridViewParties.Rows.Count - 1].Cells[1].Value = dr["PartyName"].ToString();
            dataGridViewParties.Rows[dataGridViewParties.Rows.Count - 1].Cells[2].Value = dr["PartyAddress"].ToString();
            dataGridViewParties.Rows[dataGridViewParties.Rows.Count - 1].Cells[3].Value = dr["PartyState"].ToString();
            dataGridViewParties.Rows[dataGridViewParties.Rows.Count - 1].Cells[4].Value = dr["PartyCity"].ToString();
            dataGridViewParties.Rows[dataGridViewParties.Rows.Count - 1].Cells[5].Value = dr["PartyPhone"].ToString();
        }

        if (dataGridViewParties.Rows.Count > 0)
        {
            dataGridViewParties.ClearSelection();
            dataGridViewParties.CurrentCell = null;
        }
    }

In the debugger I found that CurrentCell is already null before DataGridViewParties.CurrentCell = null; executes.

This question http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/c440c4f6-6dfc-47b6-97c0-1ce49c105b64/ is also related to it but does not offer a solution.

EDIT: Its weird but it works for Load event, I was doing it in constructor. I want that when the first row is selected and when the user presses the UP arrow key, the focus moves to a certain textbox. But in this case it does not work (first row appears blue)

    private void dataGridViewInwards_KeyDown(object sender, KeyEventArgs e)
    {
         if (e.KeyCode == Keys.Up && dataGridViewParties.SelectedRows.Count > 0 && dataGridViewParties.SelectedRows[0].Index == 0)
        {
            textBoxPartySearch.Focus();
            dataGridViewParties.ClearSelection();
            dataGridViewParties.CurrentCell = null;
        }
        else if (e.KeyCode == Keys.Up && dataGridViewParties.SelectedRows.Count == 0)
        {
            textBoxPartySearch.Focus();
        }
    }

To achieve this along with the ClearSelection you will need to set one more property

Try this in the DataBindingComplete

dataGridView1.ClearSelection();
dataGridView1.CurrentCell = null;

EDIT

Based on your comments you can modify the code as

if (e.KeyCode == Keys.Up && dataGridView1.CurrentCell.RowIndex == 0)
{                   
     this.ActiveControl = textBoxPartySearch;
     dataGridView1.Refresh();
     dataGridView1.ClearSelection();
     dataGridView1.CurrentCell = null;
     e.Handled = true;
}