我有一个用VB.NET编写的ASP.NET页面,通过INNER JOIN
使用SELECT
语句将项目获取到GridView
,并且还允许您将项目添加到发票。SQL_INSERT和Scope_Identity() - 获取记录ID
INNER JOIN
从items
和project_items
获得数据。
SELECT Items.item_id, Items.item_name, Items.item_cost, project_items.item_quantity
FROM Items
INNER JOIN project_items
ON items.item_id = project_items.item_id
WHERE project_items.project_id = @parameter
@parameter is
Session("ProjectID")
(有一个外键project_items.item_id -> items.item_id
。)
我有一个试图用SQL语句在VB.NET,试图同时插入到两个表。我试过是我试图让创造的最后一个记录的item_id
并通过使用数据插入到另一个表(project_items
)。但是,数据仅被输入到第一个表格中。
任何想法我可以做什么?
这是代码:
Protected Sub btnAddItem_Click(sender As Object, e As EventArgs) Handles btnAddItem.Click
Dim conn As New SqlConnection("Data Source=BRIAN-PC\SQLEXPRESS;Initial Catalog=master_db;Integrated Security=True")
Dim addItemComm As String = "SELECT item_id FROM project_items WHERE [email protected]"
Dim user_id_select As New Integer
Dim addItemSQL As New SqlCommand
conn.Open()
addItemSQL = New SqlCommand(addItemComm, conn)
addItemSQL.Parameters.AddWithValue("@ProjectID", Convert.ToInt32(Session("ProjectID")))
Dim datareader As SqlDataReader = addItemSQL.ExecuteReader()
datareader.Close()
conn.Close()
Dim AddNewItemComm As String = "INSERT INTO Items (item_name, item_cost, item_code) VALUES (@ItemName, @ItemCost, @ItemCode); SELECT SCOPE_IDENTITY()"
Dim AddNewItem2Comm As String = "INSERT INTO project_items (item_id, project_id, item_quantity) VALUES (@ItemID, @ProjectID, @ItemQuantity) "
Dim AddNewItemSQL As New SqlCommand
conn.Open()
AddNewItemSQL = New SqlCommand(AddNewItemComm, conn)
AddNewItemSQL.Parameters.AddWithValue("@ItemName", txtItemName.Text.Trim)
AddNewItemSQL.Parameters.AddWithValue("@ItemCost", Convert.ToInt32(txtItemCost.Text))
AddNewItemSQL.Parameters.AddWithValue("@ItemCode", txtItemCost.Text.ToString.ToUpper)
Dim ItemId As Integer
ItemId = AddNewItemSQL.ExecuteScalar()
AddNewItemSQL.ExecuteNonQuery()
conn.Close()
conn.Open()
AddNewItemSQL = New SqlCommand(AddNewItem2Comm, conn)
AddNewItemSQL.Parameters.AddWithValue("@ItemID", ItemId)
AddNewItemSQL.Parameters.AddWithValue("@ProjectID", Convert.ToInt32(Session("ProjectID")))
AddNewItemSQL.Parameters.AddWithValue("@ItemQuantity", Convert.ToInt32(txtItemQuantity.Text))
AddNewItemSQL.ExecuteNonQuery()
conn.Close()
End Sub
你得到任何错误??? – mmpatel009
只是用于调试目的的try/catch语句添加到上面的代码,并检查是否有任何异常。另外为什么关闭/打开两个命令之间的连接? – Steve
你在调试中一行一行地运行它吗?你是否从第一个命令中获得预期的ItemID? –