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xto's questions

Martin Hope
xto
Asked: 2022-09-09 04:39:33 +0000 UTC
  • 0

我了解到，在 VS 代码中，您可以通过组合键“ ！+ tab ”自动创建程序的基本结构，但由于某种原因，这种组合对我不起作用，如果我只写“ ！+ tab ”那么 tab会向右缩进，仅此而已，如果我写“ <! + tab ”，那么只会出现“ <!DOCTYPE html ”这一行，没有其他内容，这是为什么呢？请告诉我

html visual-studio-code
Martin Hope
xto
Asked: 2022-08-07 09:03:46 +0000 UTC
  • 0

我通过单击按钮将更改保存在数据库表中，这是代码本身：

else if (comboBox1.SelectedItem == "Элек")
{
label3.Text = "Электричество";
string script = "SELECT id, name, Mx_pw_VT, Pr_pw_VT, elec_kVT_hr, Print_time_fact, YZV_power_VT FROM elec;";
mycon = new MySqlConnection(connect);
mycon.Open();
MySqlDataAdapter ms_data = new MySqlDataAdapter(script, connect);
var cb = new MySqlCommandBuilder(ms_data);
cb.GetInsertCommand();
ms_data.Update(dataGridView1.DataSource as DataTable);
ms_data.InsertCommand = cb.GetInsertCommand();
ms_data.InsertCommand.CommandText += "; select * from elec where id = last_insert_id();";
ms_data.InsertCommand.UpdatedRowSource = UpdateRowSource.FirstReturnedRecord;
}

但由于某种原因，它给了我一个错误«Нарушение параллелизма: UpdateCommand затронула 0 из ожидаемых 1 записей.» 。我对另一个表有相同的代码块并且它可以工作，这个表中发生了变化，块本身：

else if (comboBox1.SelectedItem == "Рбт")
{
label3.Text = "Рбт";
string script = "SELECT id, name, Model_preparation_R_Hr, Time_for_preparation_hr, Time_for_post_processing_hr, YZV_work FROM rbt;";
mycon = new MySqlConnection(connect);
mycon.Open();
MySqlDataAdapter ms_data = new MySqlDataAdapter(script, connect);
var cb = new MySqlCommandBuilder(ms_data);
cb.GetInsertCommand();
ms_data.Update(dataGridView1.DataSource as DataTable);
ms_data.InsertCommand = cb.GetInsertCommand();
ms_data.InsertCommand.CommandText += "; select * from rbt where id = last_insert_id();";
ms_data.InsertCommand.UpdatedRowSource = UpdateRowSource.FirstReturnedRecord;
}

怎么了？请告诉我

c#