vb.net,windows,visual-studio-2010,ms-access , How to execute four queries once and then check success or failure?
How to execute four queries once and then check success or failure?
I need to execute four queries and then if there is success must return true otherwise false.
The queries affect the database but the function returns false
Private Function save_to_data()
Dim success As Boolean = False
Dim conn As OleDbConnection = GetDbConnection()
Dim total_due As Decimal = sanitize(txt_total_due.Text)
Dim amount_paid As Decimal = sanitize(txt_due.Text)
Dim discount As Decimal = sanitize(txt_discount.Text)
Dim balance As Decimal = sanitize(txt_balance.Text)
Dim cmdfoods As New OleDbCommand("UPDATE foods SET status='billed' WHERE customer_id = " & lbl_id.Text & "", conn)
Dim cmdservices As New OleDbCommand("UPDATE services SET status = 'billed' WHERE customer_id = " & lbl_id.Text & "", conn)
Dim cmdreservations As New OleDbCommand("UPDATE reservations SET nights = 4 WHERE customerid = " & lbl_id.Text & "", conn)
Dim bill As New OleDbCommand("INSERT INTO bills(customer_id, accomendation, food, service, total_due, amount_paid, discount, balance, transaction_date) VALUES " & _
"(" & lbl_id.Text & ", " & accomendation_total & ", " & food_total & ", " & service_total & ", " & total_due & ", " & amount_paid & " " & _
", " & discount & ", " & balance & ", '" & Date.Now & "')", conn)
If cmdfoods.ExecuteNonQuery And cmdservices.ExecuteNonQuery And cmdreservations.ExecuteNonQuery And bill.ExecuteNonQuery Then
success = True
success = False
There a number of other problems with the code (sql injection, sharing a connection among several commands), but here's a step in the right direction:
success = True
success = False
A more-complete solution:
Private Function save_to_data()
Dim sql As String = _
"UPDATE foods SET status='billed' WHERE customer_id = ? ;" & _
"UPDATE services SET status = 'billed' WHERE customer_id = ? ;" & _
"UPDATE reservations SET nights = 4 WHERE customerid = ? ;"
"INSERT INTO bills(" & _
"customer_id, accomendation, food, service, total_due, amount_paid, discount, balance, transaction_date" & _
") VALUES ( ?, ?, ?, ?, ?, ?, ?, ?, ?);"
Using conn As OleDbConnection = GetDbConnection(), _
cmd As New OleDbCommand(sql, conn)
cmd.Parameters.Add("food_customer_id", OleDbType.Integer).Value = lbl_id.Text
cmd.Parameters.Add("serv_customer_id", OleDbType.Integer).Value = lbl_id.Text
cmd.Parameters.Add("res_customer_id", OleDbType.Integer).Value = lbl_id.Text
cmd.Parameters.Add("bill_customer_id", OleDbType.Integer).Value = lbl_id.Text
cmd.Parameters.Add("accomendataion", OleDbType.VarChar).Value = accomendation_total
cmd.Parameters.Add("food_total", OleDbType.Decimal).Value = food_total
cmd.Parameters.Add("service_total", OleDbType.Decimal).Value = service_total
cmd.Parameters.Add("total_due", OleDbType.Decimal).Value = total_due
cmd.Parameters.Add("amount_paid", OleDbType.Decimal).Value = amount_paid
cmd.Parameters.Add("discount", OleDbType.Decimal).Value = discount
cmd.Parameters.Add("balance", OleDbType.Decimal).Value = balance
cmd.Parameters.Add("transaction_date", OleDbType.Date).Value = Date.Now
Return (cmd.ExecuteNonQuery() > 0)
I need to write a batch file that will check if a variable contains specific value. I tried to do the following: If "%%a"=="%%a:%pattern%" ( echo Yes ) else ( echo No ) input example: %%a="bob binson" %patern%="binson" I never get Yes printed! can anyone please tell what i missed...
I'm trying to send a file from my Windows machine to my Raspberry-Pi 2, and I have a client and a server. The client should be able to send a zip file over the network to my server on my linux machine. I know my client and server work on...
I want to mimick drawing of default border based on value of property BorderStyle. Instead of single border around the control, my control is visualised as four adjacent custom-drawn boxes (2×2), each having standard border drawn individually. So for example, if Control.Border is set to FixedSingle value I want to...
I can read the filename using next code when dragging a file from an Ftp folder browsed on Windows explorer. But is there a way to retrieve the full Ftp path? Private Sub DataGridView1_DragDrop(sender As Object, e As System.Windows.Forms.DragEventArgs) Handles DataGridView1.DragDrop Dim filename As String = "" If e.Data.GetDataPresent("UniformResourceLocator") Then...
This is pretty unintuitive: C:\python-tdl\examples\termbox>git config core.autocrlf false C:\python-tdl\examples\termbox>git commit termbox.py warning: LF will be replaced by CRLF in examples/termbox/termbox.py. The file will have its original line endings in your working directory. warning: LF will be replaced by CRLF in examples/termbox/termbox.py. The file will have its original line endings in...
Every other change to the datagrid view works fine but for some reason the row color just wont change. Ive debugged and my application goes through the loop to change the row color. Also I have a button that gives the datagrid view a new list and colors the rows...
I have been studying vb.net for a couple of months now and I want to try something new. I have this sample project to try. It is a web browser and I want that if a button will be clicked, a video will play immediately. This is what my application...
I have successfully imported data from xls into dataGridView. The date column in dataGridView is showing the DateTime format. I want this date column to be displayed in "dd MMM yyyy" format. I have tried as shown below: connExcel.Open() Dim dtExcelSchema As DataTable dtExcelSchema = connExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, Nothing) Dim SheetName As...
I have an existing project in VB.net with many Windows forms.I want to change all forms to deriven from a base form created in a class library. is there any way to do so? if i do inheritance with a code like this the designer dose not show the child...
Why does MS Windows (specifically server 2008 here) consider Italy to be in W. European Time when (I think) it should be in Central European Time according to every other source I can find? TZUtil /g gives: W. Europe Standard Time The control panel shows: (UTC+01:00) Amsterdam, Berlin, Bern, Rome,...
I have an Interface like this: Public Interface TreeSelectorAttributes Property selectedInTreeSelector As Boolean Property Name As String ReadOnly Property childs As IEnumerable(Of TreeSelectorAttributes) End Interface and I have a TreeView which has a List of this TreeSelectorAttributes: Public Property rootList As IEnumerable(Of TreeSelectorAttributes) now after the User chooses which elements...
I created a simple client server codes in PHP and I run it through Wamp server localhost in browser. It works but when I run it in cmd, the output looks like this : c:\wamp\www\Converter>php testserver.php PHP Fatal error: Call to undefined function socket_create() in C:\wamp\www\Converter\testserver.php on line 15 PHP...
Can anyone please explain how does the AfterMap function initalises the class objects passed in the lambda expression? When i run this bit of code as myself, it populates the dest object with my details. i can't figure out how is it doing that? but if someone can tell me...
I am writing a simple application to read the value a textbox and add to a listbox control . But i have to pass the listbox control to function . Any suggestion ? Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load test("E:\Satyajit.txt") End Sub Public Function...
As I read in the MSDN site, for example, the maximum path on drive D is "D:\some 256-character path string" where "" represents the invisible terminating null character for the current system codepage. But when I was created a share with a long path (more than 100 symbols) they trim...
I'm trying to list all folders of my c drive excluding the document folder which i do not seem to have access to. This first seemed rather simple to me but i found myself still struggling with it despite the seemingly rich .net library. I can't post any code as...
I would like to use window authentication in my program to connect to my sql server. users already have certain permissions on the SQL server and I would like to leverage that in my program. The way I currently connect to the server is using this connection string. Dim ConnectionString...
I am trying to modify 'netbeans.conf' located at following path: C:\Program Files\NetBeans 8.0.2\etc When i modify the file; add -J-Dfile.encoding=UTF-8 In Notepad, it is not allowing me to save the original file. In Notepad++, it says 'please echeck if this file is opened in another program'. Netbeans is installed in...
I have made many attempts to enter a command to run a JAR file correctly from the terminal, and I am 100% sure that all the JAR files and such are in the given paths, but I keep getting a ClassDefNotFoundException. Does it have anything to do with the way...
I have data I am trying to input into a gridview. I am looking up the number of rows for the gridview and adding data into them like this: My "test" however does not get populated into the Submitted and Variance BoundFields in the Gridview. All that populates is the...
I have the following MVC Model: Public Class Employee Public Property EmployeeID As Integer End Class Controller: Namespace Controllers Public Class EmployeeController Inherits Controller Function Details() As ActionResult Dim employee As Employee employee = New Employee employee.EmployeeID = 101 Return View() End Function End Class End Namespace View: @ModelType MVCDemo.Employee...
I'm trying to send an email via an outlook email account through a vb.net program. When I run the code I get an error telling me that I don't have a secure connection. I've been searching online and have tried all the adjustments I've found but I'm still not having...
I'm trying to use the hashcode of a guid as a random voucher name for a website, and have been trying to write new records to a SQL table with the Hashcode variable but it doesn't work. command.Parameters.Add("@voucherName", SqlDbType.NVarChar) command.Parameters("@voucherName").Value = Guid.NewGuid().GetHashCode() When using that code it just puts a...
I need to save a file which is in an External application using SendKeys.Send() method. The keys needed to be sent are Ctrl+S. I wrote the below code, but its not working: SendKeys.SendWait("^%s?"); // to get the Save As dialog Thread.Sleep(5000); SetForegroundWindow(FindWindow(null, "Save As")); Thread.Sleep(5000); SendKeys.SendWait("xyz"); // Sending FileName ...
I'm writing a VBA application which involves looping a large number of directories recursively. I am using the FindFirstFile API to to achieve this, as it offers a substantial performance boost over the FileSystemObject. In order to remove the FSO from my code entirely, I need a routine to delete...
When converting string to floating, the converter creates wrong results. ?Global.System.Convert.ToDouble("635705821821928755").ToString("0") "635705821821929000" ?Global.System.Convert.ToSingle("635705821821928755").ToString("0") "635705800000000000" I am working with VB.Net Visual Studio 2012, Framework 4 on ASP.Net Webpage. Is there any solution for converting huge numbers from string into floating?...
Form1.vb Imports System.Threading Public Class Form1 Dim demoThread As Thread Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim Start As New Class1 Me.demoThread = New Thread( _ New ThreadStart(AddressOf Start.ThreadProcSafe)) Me.demoThread.Start() End Sub Delegate Sub SetTextCallback([text] As String) Public Sub SetText(ByVal [text] As String) ' InvokeRequired required...
Pic of Error: http://s23.postimg.org/7uj6qcxtn/9708083373e57a9ec91e4296e302f88e.png Cannot Download the Application. The Application is missing required Files. Contact Application Vendor For Assistance. So I'm building a windows form application using SharpDevelop 5.2 and I'm trying to make a standalone/version someone else would be able to use on another machine. In sharpdevelop (and visual...
In my vb.net project I'm trying to add a file with a Persian name to a zip file and I do this with the code bellow: Dim myentry As New ZipEntry(dr.Item("MyFile").ToString()) zipOut.PutNextEntry(myentry) however when I open the zip file I see the file name is changed to a gibberish Is...
I have to migrate another apache instance from 2.2 to 2.4 but I have one problem. In Apache monitor I see multiple services running but I don't really know where apache .conf files are stored. In previous migrations from 2.2 to 2.4 I had them somewhere within conf folder. Apache...
Sample XML - <?xml version="1.0"?> <Root> <PhoneType dataType="string"> <Value>CELL</Value> </PhoneType> <PhonePrimaryYn dataType="string"> <Value>Y</Value> </PhonePrimaryYn> <PhoneNumber dataType="string"> <Value>555-555-5554</Value> </PhoneNumber> <PhonePrimaryYn dataType="string"> <Value>Y</Value> </PhonePrimaryYn> <PhoneType dataType="string"> <Value>HOME</Value> </PhoneType>...
While in cmd or making a batch file, I cannot use the command msg. When I try to use it, it returns the error msg is not recognized as an internal or external command, operable program or batch file." I'm pretty sure the error is that im missing a msg.exe...
I need to save the variable in %%c temporarily which comes from a for loop. But when I try to do that, the content changes unexpectedly. Some space characters appear at the end of the string. The content of %%c is a.jpg by the way. echo %%ca REM prints a.jpga...
I'm developing a server-client application using WinSock. Does using the same WSAOVERLAPPED with both WSASend and WSARecv works well? Should I use different WSAOVERLAPPED struct for WSASend and WSARecv?...
I am doing project in VB.NET and backend is mysql Can you please tell me where the error is occured Public Sub ins() con.Open() Dim cmd1 As New OdbcCommand("insert into party values('" + pcode_txt.Text + "','" + Trim(UCase(name_txt.Text)) + "','" + Trim(UCase(addr_txt.Text)) + "','" + phone_txt.Text + "','" + combo_route.SelectedItem...
I am trying to install xampp but before installation it gives me the following error: I have disabled UAC and it gives me this error.When I press ok and install the thing anyway it still won't let start apache and my sql up. Also installation was done in Program file...
I am sorting a datable with the following code.. Dim sortedExtRecords1 As DataTable sortedExtRecords1 = parsedDataset.Tables("Detail").Clone Dim dvParsedDataset1 As New DataView(parsedDataset.Tables("Detail")) dvParsedDataset1.Sort = AuthorizatonConstants.Authorization_ID sortedExtRecords1 = dvParsedDataset1.ToTable("Detail") I can further filter the results to only return non duplicates and if there is duplicates I want the last record of the...
I'm a developer-hobbyist running Windows 8.1 on a Yoga 2 Pro. I mostly do Python/Django work but I think I'm gonna pick up Ruby soon. The thing is, Windows always seems to be the limiting factor for any project I want to pick up. Last time I tried to install...
I have a jquery datepicker in a usercontrol. On the usercontrol i have a property that will return the selected date to the page which contains my usercontrol. I try to convert the string to a date: Dim MyDate As System.DateTime = System.Convert.ToDateTime(txtFromDateF.Value, System.Globalization.DateTimeFormatInfo.InvariantInfo) i keep getting the error: String...
I have a list of objects and I have an array of keywords. I need to check if all the elements of the array are present inside the list of objects. The user enters the data to be searched like this pain+fever+thirst+itching My code looks like: //i check if the...
So, I am programming in the batch script and I came across this issue. The following code will take yourwords.txt file and parse it. The existedWord variable will have the last word of the text file. So, everytime when I run this program it will only compare the user's input...
I have multiple versions of a program called Siemens NX. NX uses environmental variables for configuration. I need NX 10.0 to use a different set of environmental variables than my NX 7.5 which uses the system environmental variables. Therefore, I have written a batch file that setups the environmental variables...
I need a way to compare two arrays in vb.net and save result in third array: Dim KonRes(3) As Integer Dim UserRes(3) As Integer Dim YelRed(3) As Integer KonRes(0) = 1 KonRes(1) = 2 KonRes(2) = 3 KonRes(3) = 4 UserRes(0) = 4 UserRes(1) = 3 UserRes(2) = 2 UserRes(3)...
I'm attempting to learn python using the book 'a byte of python'. The code: import sys print('the command line arguments are:') for i in sys.argv: print(i) print('\n\nThe PYTHONPATH is', sys.path, '\n') outputs: the command line arguments are: C:/Users/user/PycharmProjects/helloWorld/module_using_sys.py The PYTHONPATH is ['C:\\Users\\user\\PycharmProjects\\helloWorld', 'C:\\Users\\user\\PycharmProjects\\helloWorld', 'C:\\Python34\\python34.zip', 'C:\\Python34\\DLLs', 'C:\\Python34\\lib', 'C:\\Python34', 'C:\\Python34\\lib\\site-packages']...
I have the following right now which works fine if the string is alphanumeric and separated by commas, but it doesn't work if I only have a single string. "^([a-zA-Z0-9]+,)+[a-zA-Z0-9]+$" Works for something like "1A,1B,1C", doesn't work on "1A" Sorry, I don't know much about regex and I only got...
I have a project without any parameters used in SQL queries. Is there any solution so that i don't have to change the function and validate parameters from the Query string itself? Query = "select * from tbl_Users where userName='"& textbox1.text &"' and password='"& textbox2.text &"' " ds = obj.ExecuteQueryReturnDS(Query)...
I have a file called pictures.xml and it contains some pictures information like: <ResourcePicture Name="a.jpg"> <GeneratedPicture Name="b.jpg"/> <GeneratedPicture Name="c.jpg"/> </ResourcePicture> <ResourcePicture Name="z1.jpg"> <GeneratedPicture Name="z2.jpg"/> <GeneratedPicture Name="z3.jpg"/> <GeneratedPicture Name="z4.jpg"/> </ResourcePicture> What I want do do is to get each line in for loop and print the names of the pictures. Sample...
I try to use go get gopkg.in/fatih/pool.v2 to install pool according to Readme.md, but can't success: C:\Users\xiaona\Documents\GitHub> go get -v gopkg.in/fatih/pool.v2 Fetching https://gopkg.in/fatih/pool.v2?go-get=1 https fetch failed. Fetching http://gopkg.in/fatih/pool.v2?go-get=1 import "gopkg.in/fatih/pool.v2": http/https fetch: Get http://gopkg.in/fatih/poo l.v2?go-get=1: dial tcp 22.214.171.124:80: ConnectEx tcp: A connection attempt failed because the connected party did not...
This code: Module Module1 Sub Main() ' Our input string. Dim animals As String = "cat, dog, bird" ' See if dog is contained in the string. If Not animals.IndexOf("dog") = -1 Then Console.WriteLine(animals.IndexOf("dog")) End If End Sub End Module Return start position 5 in string But how to return...