vb.net添加数据,vbnet连接数据库

vb.net向数据库添加数据（在线等待）

第一个问题，存储数据：使用SqlCommand（如果是Sql的）：Using cmd As New SqlCommand()�0�2 �0�2cmd.Connection = new SqlConnection("server=.;database=数据库名;integrated security=sspi")�0�2 �0�2cmd.Connection.Open()�0�2 �0�2cmd.CommandText=string.Format("Insert into 表名字 Values('{0}','{1}'",您的第一个字符串变量，第二个字符串变量【如果是数值类型的，不要在索引前加单引号了】)�0�2 cmd.NonExecuteQuery();'获取数据SqlDataAdapter adapter = new SqlDataAdapter(cmd);cmd.CommandText="select * from 表"DataTable dt = new DataTable()adapter.Fill(dt)DataGridView.DataSource = dtEnd Using

成都创新互联公司是专业的南平网站建设公司，南平接单;提供网站建设、网站设计,网页设计,网站设计,建网站,PHP网站建设等专业做网站服务;采用PHP框架,可快速的进行南平网站开发网页制作和功能扩展;专业做搜索引擎喜爱的网站,专业的做网站团队,希望更多企业前来合作!

vb.net 一个数组怎么添加新数据

list1.additem j 意思就是把j添加至list1列表中,这是在一个for 循环中，循环了10次，添加了10次 j，即 list1 中 有10列分别为：1,3,6,10,15,21,28,36,45,55

下面又来了一个循环， list1.removeitem 删除列，删除的是 list1.listcount - i ，list1.listcount 就是总列数为10，减去 i ，i 是1到4，即10-1，9-2，8-3，7-4 每减掉一次，list1.listcount 就少了一条记录。

(注意，list1.listcount-1 是最后一条记录)

减掉了第 9，7，5，3列

剩余为 1,3,6,15,28,45

结果为：3,15,28

'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

'亏你提醒了，我写错了，上面修改了，第一个索引为0，最后一个为9.

'也就是，问题所问的第二列的索引为1，第四列的索引为3...

vb.net中向ArrayList添加String型的数据是怎样添加的?

Dim

sl

As

New

ArrayList

sl.Add("单个字符串")

Dim

sa

As

String()

=

{"a",

"b",

"c"}

sl.AddRange(sa)

'添加字符数组

Dim

objs

As

Object()

=

sl.ToArray

'将数据转换为数组

注意，ArrayList不是类型安全的集合方式，如果你的集合只要存储字符串的话，建议用List(Of

String)来进行操作。

vb.net向数据库添加数据

报的错是什么？

或者，输出一下，你的str。

Response.Write(str)

Response.End()

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

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？”

只有录入主表中的orderid和ordername后, 先更新主表数据源,才可以编辑更新明细表,这是为什么? 请问,有没有其他更好的方法, 实现主表和明细表的新增记录同时更新呢? 谢谢关照！ 网友：方宇 回复：

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

End Sub

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

BmOrders.Position += 1

End Sub

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

End Sub

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()

BmOrders.EndCurrentEdit()

If Not dsTestOrders.HasChanges(DataRowState.Deleted) Then

Try

daOrders.Update(dsTestOrders, "Orders")

daOrderDetails.Update(dsTestOrders, "OrderDetails")

dsTestOrders.AcceptChanges()

Catch err As System.SystemException

dsTestOrders.RejectChanges()

MessageBox.Show(err.ToString)

Throw

End Try

Else

Try

daOrderDetails.Update(dsTestOrders, "OrderDetails")

daOrders.Update(dsTestOrders, "Orders")

dsTestOrders.AcceptChanges()

Catch err As System.SystemException

dsTestOrders.RejectChanges()

MessageBox.Show(err.ToString)

Throw

End Try

End If

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

FillData()

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

End Sub

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

Try

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()

End If

Finally

OrderDetailsHasChange = True

End Try

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 If

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

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

用vb.net向access文件添加数据

释放绑定，添加新的数据代码有问题，可能是insert into 语句不对。