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我有一个访问数据库，我有一个刷新按钮，刷新数据库中的这些列表框。万一有些事情发生了变化，每件事情都很好，除非你多次点击刷新，否则会引发系统资源问题。我关闭了连接，但有没有像垃圾回收器或我缺少的东西？c＃和访问数据库系统资源超出
listBox10.Items.Clear();
listBox6.Items.Clear();
listBox5.Items.Clear();
listBox4.Items.Clear();
listBox3.Items.Clear();
listBox11.Items.Clear();
listBox12.Items.Clear();
listBox13.Items.Clear();
listBox14.Items.Clear();
listBox15.Items.Clear();
progressBar1.Value = 0;
// progressBar1.Increment(1);
connection.Open();
for (int i = -10; i < 10; i++)
{
try
{
OleDbCommand command = new OleDbCommand();
command.Connection = connection;
string query = $"select * from Table1 where Status='Arches - InProduction' AND Tamp={i}";
command.CommandText = query;
OleDbDataReader reader = command.ExecuteReader();
progressBar1.Increment(1);
while (reader.Read())
{
listBox15.Items.Add(reader["Description"].ToString());
}
}
catch (Exception ex)
{ MessageBox.Show("error " + ex); }
try
{
OleDbCommand command2 = new OleDbCommand();
command2.Connection = connection;
string query = $"select * from Table1 where Status='Arches - PreProduction' AND Tamp={i}";
command2.CommandText = query;
OleDbDataReader reader = command2.ExecuteReader();
progressBar1.Increment(1);
while (reader.Read())
{
listBox10.Items.Add(reader["Description"].ToString());
}
}
catch (Exception ex)
{ MessageBox.Show("error " + ex); }
progressBar1.Increment(1);
try
{
OleDbCommand command3 = new OleDbCommand();
command3.Connection = connection;
string query = $"select * from Table1 where Status='Rock - PreProduction' AND Tamp={i}";
command3.CommandText = query;
OleDbDataReader reader = command3.ExecuteReader();
progressBar1.Increment(1);
while (reader.Read())
{
listBox6.Items.Add(reader["Description"].ToString());
}
}
catch (Exception ex)
{ MessageBox.Show("error " + ex); }
try
{
OleDbCommand command4 = new OleDbCommand();
command4.Connection = connection;
string query = $"select * from Table1 where Status='Rock - InProduction' AND Tamp={i}";
command4.CommandText = query;
OleDbDataReader reader = command4.ExecuteReader();
progressBar1.Increment(1);
while (reader.Read())
{
listBox14.Items.Add(reader["Description"].ToString());
}
}
catch (Exception ex)
{ MessageBox.Show("error " + ex); }
try
{
OleDbCommand command5 = new OleDbCommand();
command5.Connection = connection;
string query = $"select * from Table1 where Status='TV - PreProduction' AND Tamp={i}";
command5.CommandText = query;
OleDbDataReader reader = command5.ExecuteReader();
progressBar1.Increment(1);
while (reader.Read())
{
listBox5.Items.Add(reader["Description"].ToString());
}
}
catch (Exception ex)
{ MessageBox.Show("error " + ex); }
try
{
OleDbCommand command6 = new OleDbCommand();
command6.Connection = connection;
string query = $"select * from Table1 where Status='TV - InProduction' AND Tamp={i}";
command6.CommandText = query;
OleDbDataReader reader = command6.ExecuteReader();
progressBar1.Increment(1);
while (reader.Read())
{
listBox13.Items.Add(reader["Description"].ToString());
}
}
catch (Exception ex)
{ MessageBox.Show("error " + ex); }
try
{
OleDbCommand command7 = new OleDbCommand();
command7.Connection = connection;
string query = $"select * from Table1 where Status='Slab - PreProduction' AND Tamp={i}";
command7.CommandText = query;
OleDbDataReader reader = command7.ExecuteReader();
progressBar1.Increment(1);
while (reader.Read())
{
listBox4.Items.Add(reader["Description"].ToString());
}
}
catch (Exception ex)
{ MessageBox.Show("error " + ex); }
try
{
OleDbCommand command8 = new OleDbCommand();
command8.Connection = connection;
string query = $"select * from Table1 where Status='Slab - InProduction' AND Tamp={i}";
command8.CommandText = query;
OleDbDataReader reader = command8.ExecuteReader();
progressBar1.Increment(1);
while (reader.Read())
{
listBox12.Items.Add(reader["Description"].ToString());
}
}
catch (Exception ex)
{ MessageBox.Show("error " + ex); }
try
{
OleDbCommand command9 = new OleDbCommand();
command9.Connection = connection;
string query = $"select * from Table1 where Status='Cast Stone - PreProduction' AND Tamp={i}";
command9.CommandText = query;
OleDbDataReader reader = command9.ExecuteReader();
progressBar1.Increment(1);
while (reader.Read())
{
listBox3.Items.Add(reader["Description"].ToString());
}
}
catch (Exception ex)
{ MessageBox.Show("error " + ex); }
try
{
OleDbCommand command10 = new OleDbCommand();
command10.Connection = connection;
string query = $"select * from Table1 where Status='Cast Stone - InProduction' AND Tamp={i}";
command10.CommandText = query;
OleDbDataReader reader = command10.ExecuteReader();
progressBar1.Increment(1);
while (reader.Read())
{
listBox11.Items.Add(reader["Description"].ToString());
}
}
catch (Exception ex)
{ MessageBox.Show("error " + ex); }
}
connection.Close();
还当我尝试关闭它说期望尝试
OleDbCommand command = new OleDbCommand();
OleDbDataReader reader = command.ExecuteReader();
try
{
//OleDbCommand command = new OleDbCommand();
command.Connection = connection;
string query = $"select * from Table1 where Status='Arches - InProduction' AND Tamp={i}";
command.CommandText = query;
//OleDbDataReader reader = command.ExecuteReader();
progressBar1.Increment(1);
while (reader.Read())
{
listBox15.Items.Add(reader["Description"].ToString());
}
}
finally
{
if (reader != null)
{
reader.Dispose();
}
}
您应该在处理完所有读者后“处理（）”所有读者。事实上'Dispose'实现'IDisposable'的任何东西（Commands，Conenction等）。这可能是也可能不是你的问题，但它肯定没有帮助。 – Liam
写一个函数接受查询和列表框，执行查询并绑定到列表框也是有意义的。我怀疑这会解决你的问题，只是很讨厌。 –