怎么在datagridview中对记录进行上移或下移操作？

怎么在datagridview中对记录进行上移或下移操作？/// <summary>

/// 数据上移一条

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void tsbBack_Click(object sender, EventArgs e)

{

int i = dgvMain.Rows.GetPreviousRow(dgvMain.CurrentRow.Index, DataGridViewElementStates.None); //获取原选定上一行索引

dgvMain.Rows[i].Selected = true; //选中整行

dgvMain.CurrentCell = dgvMain[0, i]; //指针上移

}

/// <summary>

/// 数据下移一条

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void tsbNext_Click(object sender, EventArgs e)

{

int i = dgvMain.Rows.GetNextRow(dgvMain.CurrentRow.Index,DataGridViewElementStates.None); //获取原选定下一行索引

dgvMain.Rows[i].Selected = true; //选中整行

dgvMain.CurrentCell = dgvMain[0,i]; //指针下移

}

DGVMAIN是DATAGRIDVIEW