c#winform中datagridview删除数据库中的整行数据

Question

int id = 0;
try
{
id = (int)dgv_inventory.CurrentRow.Cells[0].Value;
}
catch (System.Exception ex)
{
MessageBox.Show("请选择有效数据行！");
return;
}
if (MessageBox.Show("确定要删除吗？", "询问", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) != DialogResult.Yes)
return;
SqlConnection sqlConnection = new SqlConnection();
sqlConnection.ConnectionString =
"Server=(local);Database=DB_Equipment;Integrated Security=sspi";
using (SqlConnection conn = new SqlConnection(sqlConnection.ConnectionString))
{
string sql = string.Format("delete from tb_inventory where EquipmentNo={0}", id);
SqlCommand cmd = new SqlCommand(sql, conn);
conn.Open();
int n = Convert.ToInt32(cmd.ExecuteNonQuery());
if (n != 1)
{
MessageBox.Show("删除失败！");
}
else
{
MessageBox.Show("删除成功！");
}
}
以上为删除按钮事件中的代码，运行时只能运行到try_catch语句，即一直跳出窗体提示“请选择有效数据行”，这是哪里出现了问题？

Answer 1

id = (int)dgv_inventory.CurrentRow.Cells[0].Value; 报错了，估计你dgv_inventory.CurrentRow.Cells[0].Value获取到的是空。你先用string类型接受下，debug看下结果是什么。转化成int时报错了。