vb.net添加记录

VB.net 在MSSQL数据库 插入一条记录 语句?

修改为：

如果这个字段是数字,应该没有问题.

vb.net 一个数组怎么添加新数据

(注意,list1.listcount-1 是最后一条记录)

'ListCount返回列表框中的项目总数

'ListCount-1是列表框中最后一个项目的索引号

VB.NET如何插入sql记录,高手指点

Dim?cn?As?OleDbConnection?=?New?OleDbConnection(cnStr)

Dim?cmd?As?OleDbCommand?=?New?OleDbCommand(sql)

cmd.ExecuteNonQuery()

用vb.net向access中添加记录顺序混乱

数据库中记录的存放是无序的,不存在顺序问题.

如果需要顺序,可在查询语句中使用 order by 子句.

一对多关联的数据库在VB.NET中如何新增记录

script type="text/javascript" src="" /script

有两个表order(orderid,ordername,totalprice), orderdetail(orderid,productid,productname,price) 已经建立一对多

关联(orderid). 用VB.NET建立一个窗体, 用于主表和明细表的数据录入及更新.

在窗体上增加两个sqldataadapter,分别选择order和orderdetail表, 并生成数据集,在DATASET中建立关联(orderid) 主表中:ORDERID,ORDERNAME 绑定在两个TEXTBOX文本框中,用于接受用户的输入,totalprice接受明细表中price

的汇总值.

明细表绑定到一个DATAGRID控件, datasource:dsorder; datamember:order.orderorderdetail建立的关联名称

问题: 在主表中新增一个记录,用户录入orderid和ordername后,进入明细表的录入,用户录入productid, productname, price后,提示 "明细orderID列不允许空值,要更正该值吗?" 是什么原因?

用于连接主表的明细orderID如果输入跟主表一样的orderID时提示"ForeignKeyconstraint 要求在交叉表中存在子键值.要更正该值吗?"

附部分源代码:

Public Class fmOrders

Inherits System.Windows.Forms.Form

Dim WithEvents dtOrderDetails As New DataTable()

Dim BmOrders As BindingManagerBase

Dim BmOrderDetails As BindingManagerBase

Dim OrderDetailsHasChange As Boolean

Dim orderid As DataColumn

dim ordername as datacolumn

Dim SubTotal As DataColumn Private Sub bnFirst_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnFirst.Click

BmOrders.Position = 0

End Sub

Private Sub bnPrior_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnPrior.Click

BmOrders.Position -= 1

Private Sub bnNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnNext.Click

BmOrders.Position += 1

Private Sub bnLast_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnLast.Click

BmOrders.Position = BmOrders.Count - 1

End Sub Private Sub bnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnAdd.Click

Try

BmOrders.EndCurrentEdit()

BmOrders.AddNew()

Catch err As System.SystemException

MessageBox.Show(err.ToString)

End Try

Private Sub bnLoad_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnLoad.Click

FillData()

End Sub Private Sub bnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnUpdate.Click

Dim dsTestOrdersChange As DataSet BmOrderDetails.EndCurrentEdit()

If Not dsTestOrders.HasChanges(DataRowState.Deleted) Then

daOrders.Update(dsTestOrders, "Orders")

daOrderDetails.Update(dsTestOrders, "OrderDetails")

dsTestOrders.AcceptChanges()

dsTestOrders.RejectChanges()

Throw

Else

End If

End Sub Private Sub fmOrders_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

dtOrderDetails = dsTestOrders.Tables("OrderDetails")

BmOrders = Me.BindingContext(dsTestOrders, "Orders")

BmOrderDetails = Me.BindingContext(dsTestOrders, "Orders.OrdersOrderDetails")

OrderDetailsHasChange = True

SubTotal = dsTestOrders.Tables("Orders").Columns("SubTotal")

SubTotal.DefaultValue = 0

Price = dsTestOrders.Tables("OrderDetails").Columns("Price")

Price.DefaultValue = 0

End Sub Private Sub FillData()

dsTestOrders.EnforceConstraints = False

daOrders.Fill(dsTestOrders)

daOrderDetails.Fill(dsTestOrders)

dsTestOrders.EnforceConstraints = True

Private Sub dtOrderDetails_ColumnChanged(ByVal sender As Object, ByVal e As System.Data.DataColumnChangeEventArgs) _

Handles dtOrderDetails.ColumnChanged Dim drOrders As DataRow

Dim drOrderDetails As DataRow

Dim iSubTotal As Integer

If OrderDetailsHasChange Then

OrderDetailsHasChange = False

drOrders = dsTestOrders.Tables("Orders").Rows(BmOrders.Position)

iSubTotal = 0

For Each drOrderDetails In drOrders.GetChildRows("OrdersOrderDetails")

iSubTotal = iSubTotal + drOrderDetails("price")

Next

drOrders.BeginEdit()

drOrders("SubTotal") = iSubTotal

drOrders.EndEdit()

Finally

End Sub Private Sub bndelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bndelete.Click

If BmOrders.Count 0 Then

BmOrders.RemoveAt(BmOrders.Position)

End Sub Private Sub bncancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bncancel.Click

BmOrders.CancelCurrentEdit() End Sub

End Class script type="text/javascript" src="" /script

VB 2010(.net) SQL数据库添加记录,数据里没有,如何处理

如果你是用SqlDataAdapter,那么你最后要加一句:

SqlDataAdapter.Update(objds,虚拟表名)

至于补充问题:

试试用这样的方法:

dim

send,e

as

object

或

还再不行!那么你独立写一个方法就好了!

然后But_Clear_Click(...)调用这个方法,

其他地方需要也调用这个方法!

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