我有一个查询
insert into carsdescription
(description,idCar)
value (@description,@idCar)
where idCar=@idCar;
select nameOfCar
from Cars
where idCar=@idCar";
如何在一个sqlCommand中执行这个??
using(SqlConnection conn=new SqlConnection(connString))
{
using(sqlCommand cmd=new SqlCommand())
{
cmd.Parameteres, conn etc... //this is a peanut
// your proposition
}
}
表架构:
Carsdescription:
ID (PK, int, autoincrement)
idcar(FK, int)
Description(varchar)
汽车
Id(int, PK, autoincrement)
Name(nvarchar(255)
答案 0 :(得分:3)
您是否尝试将数据从一个表复制到另一个表?
像
这样的东西INSERT INTO CarsDescription (description)
SELECT nameOfCar
FROM Cars
WHERE idCar = @idCar
这会将所有'nameOfCar'值复制到CarsDescription表中。如果您不想重复,请将 SELECT 更改为 SELECT DISTINCT
答案 1 :(得分:2)
insert into carsdescription (description) value (@description) where idCar=@idCar;
INSERT ... WHERE ??
(不是我知道你真正要做的是什么,但该查询首先不起作用)
答案 2 :(得分:2)
你做不到。不在一个声明中。你为什么甚至想要?你的想法是什么,或者你的要求是什么?
首先必须使用cmd.ExecuteNonQuery
调用来插入新数据,然后需要使用cmd.ExecuteReader
进行第二次调用,或者使用SqlDataAdapter填充DataTable以再次检索数据。
using(SqlConnection conn = new SqlConnection(connString))
{
conn.Open();
string cmdInsert = "insert into carsdescription(description) value (@description)";
using(sqlCommand cmd = new SqlCommand(cmdInsert, conn))
{
cmd.Parameters.AddWithValue("@description", description);
cmd.ExecuteNonQuery();
}
string selectStmt = "select nameOfCar from dbo.Cars where idCar = @idCar";
using(sqlCommand cmd2 = new SqlCommand(selectStmt, conn))
{
cmd2.Parameters.AddWithValue("@idCar", idCar);
string resultValue = cmd2.ExecuteScalar().ToString();
}
conn.Close();
}
答案 3 :(得分:2)
创建一个存储过程,将Description和IDCar作为参数,并返回标量NameOfCar或Cars表中的结果集。然后,您可以使用C#代码中的单个命令调用该存储过程。
答案 4 :(得分:2)
这在单个呼叫中执行完全有效。可能不推荐,但它是可能的。
using (SqlConnection conn = new SqlConnection("Data Source=(local);Initial Catalog=JunkBox;Integrated Security=SSPI;"))
{
SqlCommand cmd = new SqlCommand("INSERT INTO JunkSO(Id, Name) VALUES(@Id, @Description) SELECT * FROM JunkSO", conn);
cmd.Parameters.AddWithValue("@Id", 10);
cmd.Parameters.AddWithValue("@Description", "TestDescription");
conn.Open();
using (SqlDataReader rd = cmd.ExecuteReader())
{
if (rd.HasRows)
{
while (rd.Read())
{
MessageBox.Show(rd[0].ToString() + " " + rd[1].ToString());
}
}
}
}
答案 5 :(得分:0)
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = your_query;
cmd.CommandType = CommandType.Text;
cmd.Parameters.Add(new SqlParameter("@description", description));
cmd.Parameters.Add(new SqlParameter("@idCar", idCar));
using (SqlDataReader reader = cmd.ExecuteReader())
{
//reader here
}
}
答案 6 :(得分:0)
嗯,我也找到了一种方法,我知道它很乱,但我也是初学者,所以我自己做了如下。
SqlConnection add = new SqlConnection(ConfigurationManager.ConnectionStrings["sismanager"].ConnectionString);
SqlCommand additem = new SqlCommand("INSERT INTO Godown(Gname, Gstock) VALUES(@Gname, @Gstock)", add);
additem.Parameters.AddWithValue("@Gname", textBox1.Text.Trim());
additem.Parameters.AddWithValue("@Gstock", textBox2.Text.Trim());
try
{
add.Open();
additem.ExecuteNonQuery();
}
catch
{
}
finally
{
add.Close();
dataGridView1.Columns.Clear();
SqlConnection setcon = new SqlConnection(ConfigurationManager.ConnectionStrings["sismanager"].ConnectionString);
using (SqlCommand getdata = new SqlCommand("SELECT Gid, Gname, Gstock FROM Godown ORDER BY Gname ASC", setcon))
{
setcon.Open();
SqlDataAdapter da = new SqlDataAdapter(getdata);
DataTable dt = new DataTable();
da.Fill(dt);
if (dt.Rows.Count > 0)
{
comboBox1.DisplayMember = "Gname";
comboBox1.ValueMember = "Gid";
comboBox1.DataSource = dt;
dataGridView1.DataSource = dt;
dataGridView1.Columns[0].HeaderText = "Item Id";
dataGridView1.Columns[1].HeaderText = "Item";
dataGridView1.Columns[2].HeaderText = "Item Stock";
DataGridViewButtonColumn deletebtn = new DataGridViewButtonColumn();
dataGridView1.Columns.Add(deletebtn);
deletebtn.HeaderText = "Remove";
deletebtn.Text = "Remove";
deletebtn.Name = "Dbtn";
deletebtn.UseColumnTextForButtonValue = true;
}
else
{
MessageBox.Show("No Stock Items to Show", "Stock Details", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
}
然而,这个答案与你的问题无关,但我已经尝试了自己的解决方案。