[英]Insert data into a SQL Server database using vb.net
我创建一个SQL Server数据库,并希望在该数据库的特定表中添加一些数据。 我使用一些文本框输入数据,并使用添加按钮完成操作。 但是,当我点击按钮时,整个过程停止了,并在DBSQL模块中指出了错误,如下所示。
这是我的代码:
Imports System.Data
Imports System.Data.SqlClient
Module DBSQLServer
Public con As New SqlConnection("Data Source=JOYALXDESKTOP\SQLEXPRESS;Initial Catalog=SaleInventory;Integrated Security=True")
Public cmd As New SqlCommand
Public da As New SqlDataAdapter
Public ds As New DataSet
Public dt As DataTable
Public qr As String
Public i As Integer
Public Function searchdata(ByVal qr As String) As DataSet
da = New SqlDataAdapter(qr, con)
ds = New DataSet
da.Fill(ds)
Return ds
End Function
Public Function insertdata(ByVal qr As String) As Integer
cmd = New SqlCommand(qr, con)
con.Open()
i = cmd.ExecuteNonQuery()
con.Close()
Return i
End Function
End Module
该行发生错误:
i = cmd.ExecuteNonQuery()
错误是:
System.Data.SqlClient.SqlException:'')附近的语法不正确
这是我的添加按钮代码:
Private Sub Add_Click(sender As Object, e As EventArgs) Handles add.Click
If (isformvalid()) Then
qr = "Insert into tblProductInfo (ProName, ProDesc, ProPrice, ProStock) Values('" & nametext.Text & "','" & descriptiontext.Text & "','" & pricetext.Text & "','" & stocktext.Text & "',)"
Dim logincorrect As Boolean = Convert.ToBoolean(insertdata(qr))
If (logincorrect) Then
MsgBox("Stock Added Successfully ...", MsgBoxStyle.Information)
Else
MsgBox("Something Wrong. Record Not Saved. Please Check and Try Again...", MsgBoxStyle.Critical)
End If
End If
End Sub
当我复制该错误的详细信息时,它显示:
System.Data.SqlClient.SqlException
的HResult = 0x80131904
Message =')'附近的语法不正确。
Source = .Net SqlClient数据提供程序堆栈跟踪:
在System.Data.SqlClient.SqlConnection.OnError(SqlException异常,布尔值breakConnection,操作
1 wrapCloseInAction)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action1 wrapCloseInAction)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action1 wrapCloseInAction)
TdsParserStateObject stateObj,布尔值CallerHasConnectionLock,布尔值asyncClose)在System.Data.SqlClient.TdsParser。在System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName,布尔异步,Int32超时,客户端系统数据。 SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1完成,字符串methodName,布尔sendToPipe,Int32超时,布尔&usedCache,布尔asyncWrite,布尔inRetry)位于InventoryManagement.DBSQLServer.insertdata(String qr)中的System.Data.SqlClient.SqlCommand.ExecuteNonQuery() C:\\ Users \\ Joy Alx \\ source \\ repos \\ InventoryManagement \\ InventoryManagement \\ DBClass \\ DBSQLServer.vb:位于C:\\ Users \\ Joy Alx \\ source \\ repos \\ InventoryManagement \\ InventoryManagement \\ Screens \\ Tools \\ stock.vb的InventoryManagement.stock.Add_Click(Object sender,EventArgs e)的第25行System.Windows.Forms.Control.WmMouseUp(Message&m,MouseButtons button,Int32 clicks)处的Bunifu.Framework.UI.BunifuImageButton.OnClick(EventArgs e)处的System.Windows.Forms.Control.OnClick(EventArgs e)。 System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message.m)在System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message&m)在System.Windows.Forms.Windows.Forms.Control.WndProc(Message&m) System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG&msg)处的NativeWindow.DebuggableCallback(IntPtr hWnd,Int32 msg,IntPtr wparam和IntPtr lparam)在System.Windows.Forms.Application.ComponentManager.System.Windows.Forms。 .FPushMessageLoop(IntPtr dwComponentID,Int32原因,Int32 pvLoopData)在System.Windows.Forms.Appl Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()上的System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32原因,ApplicationContext上下文)处的ication.ThreadContext.RunMessageLoopInner(Int32原因,ApplicationContext上下文)。 81行的InventoryManagement.My.MyApplication.Main(String [] Args)的Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String [] commandLine)的WindowsFormsApplicationBase.DoApplicationModel()
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action
If I have done anything wrong to ask this type question, I am sorry. I am new in this community.Thanks in advance.
您的查询有问题:
qr = "Insert into tblProductInfo (ProName, ProDesc, ProPrice, ProStock) Values('" & nametext.Text & "','" & descriptiontext.Text & "','" & pricetext.Text & "','" & stocktext.Text & "',)"
应该
qr = "Insert into tblProductInfo (ProName, ProDesc, ProPrice, ProStock) Values('" & nametext.Text & "','" & descriptiontext.Text & "','" & pricetext.Text & "','" & stocktext.Text & "')"
想象一下这样的SQL查询:
Insert into tblProductInfo (ProName, ProDesc, ProPrice, ProStock) Values('[name]','[description]','[price]','[stock]',)
和
Insert into tblProductInfo (ProName, ProDesc, ProPrice, ProStock) Values('[name]','[description]','[price]','[stock]')
编辑:另外,我还必须同意同事的意见-使用参数化查询或存储过程-这将防止SQL注入。 另外,在将输入推送到db之前,请确保您正在验证输入-将文本推送到int字段将失败。
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