检查C＃中是否存在来自DataGridView的行

Question

我有一个DataGridView，它从我分离的网络的每个磁盘中填充数据。我想将它插入到我的数据库中，但我不知道如何验证我在DataGridView中有多少行。

这是我已有的代码：

try
{
    con = new OleDbConnection(cs.DBConn);
    con.Open();

    string queryInsert = @"INSERT INTO tblComputers
        (Partition1Disk, Type1Disk, TotalSpace1Disk, 
        UseSpace1Disk, FreeSpace1Disk, PercentageUse1Disk, Partition2Disk, Type2Disk, TotalSpace2Disk, 
        UseSpace2Disk, FreeSpace2Disk, PercentageUse2Disk, Partition3Disk, Type3Disk, TotalSpace3Disk, 
        UseSpace3Disk, FreeSpace3Disk, PercentageUse3Disk,Partition4Disk, Type4Disk, TotalSpace4Disk, 
        UseSpace4Disk, FreeSpace4Disk, PercentageUse4Disk)
        VALUES
        (@Partition1Disk, @Type1Disk, @TotalSpace1Disk, @UseSpace1Disk, @FreeSpace1Disk, @PercentageUse1Disk, 
        @Partition2Disk, @Type2Disk, @TotalSpace2Disk, @UseSpace2Disk, @FreeSpace2Disk, @PercentageUse2Disk, 
        @Partition3Disk, @Type3Disk, @TotalSpace3Disk, @UseSpace3Disk, @FreeSpace3Disk, @PercentageUse3Disk,
        @Partition4Disk, @Type4Disk, @TotalSpace4Disk, @UseSpace4Disk, @FreeSpace4Disk, @PercentageUse4Disk)";

        cmd = new OleDbCommand(queryInsert);
        cmd.Connection = con;

    for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
    {

        cmd.Parameters["@Partition1Disk"].Value = dataGridView1.Rows[i].Cells[0].Value.ToString();
        cmd.Parameters["@Type1Disk"].Value = dataGridView1.Rows[i].Cells[1].Value.ToString();
        cmd.Parameters["@TotalSpace1Disk"].Value = dataGridView1.Rows[i].Cells[2].Value.ToString();
        cmd.Parameters["@UseSpace1Disk"].Value = dataGridView1.Rows[i].Cells[3].Value.ToString();
        cmd.Parameters["@FreeSpace1Disk"].Value = dataGridView1.Rows[i].Cells[4].Value.ToString();
        cmd.Parameters["@PercentageUse1Disk"].Value = dataGridView1.Rows[i].Cells[5].Value.ToString();

        cmd.Parameters["@Partition2Disk"].Value = dataGridView1.Rows[i].Cells[0].Value.ToString();
        cmd.Parameters["@Type2Disk"].Value = dataGridView1.Rows[i].Cells[1].Value.ToString();
        cmd.Parameters["@TotalSpace2Disk"].Value = dataGridView1.Rows[i].Cells[2].Value.ToString();
        cmd.Parameters["@UseSpace2Disk"].Value = dataGridView1.Rows[i].Cells[3].Value.ToString();
        cmd.Parameters["@FreeSpace2Disk"].Value = dataGridView1.Rows[i].Cells[4].Value.ToString();
        cmd.Parameters["@PercentageUse2Disk"].Value = dataGridView1.Rows[i].Cells[5].Value.ToString();

        cmd.Parameters["@Partition3Disk"].Value = dataGridView1.Rows[i].Cells[0].Value.ToString();
        cmd.Parameters["@Type3Disk"].Value = dataGridView1.Rows[i].Cells[1].Value.ToString();
        cmd.Parameters["@TotalSpace3Disk"].Value = dataGridView1.Rows[i].Cells[2].Value.ToString();
        cmd.Parameters["@UseSpace3Disk"].Value = dataGridView1.Rows[i].Cells[3].Value.ToString();
        cmd.Parameters["@FreeSpace3Disk"].Value = dataGridView1.Rows[i].Cells[4].Value.ToString();
        cmd.Parameters["@PercentageUse3Disk"].Value = dataGridView1.Rows[i].Cells[5].Value.ToString();

        cmd.Parameters["@Partition4Disk"].Value = dataGridView1.Rows[i].Cells[0].Value.ToString();
        cmd.Parameters["@Type4Disk"].Value = dataGridView1.Rows[i].Cells[1].Value.ToString();
        cmd.Parameters["@TotalSpace4Disk"].Value = dataGridView1.Rows[i].Cells[2].Value.ToString();
        cmd.Parameters["@UseSpace4Disk"].Value = dataGridView1.Rows[i].Cells[3].Value.ToString();
        cmd.Parameters["@FreeSpace4Disk"].Value = dataGridView1.Rows[i].Cells[4].Value.ToString();
        cmd.Parameters["@PercentageUse4Disk"].Value = dataGridView1.Rows[i].Cells[5].Value.ToString();
    }

    cmd.ExecuteNonQuery();

    MessageBox.Show("Successfully saved", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception)
{
    throw;
}

问题是我的网络中的某些计算机只有一个分区，当它发生时，应用程序将显示一个错误，指出索引超出范围。我可以做任何验证，以确定DataGridView中只有一行或最多4行，并且根据该行在该列中插入null？