Deserializing Data Back To A Dataset But Data Is Not Persisted To DB
Jul 27, 2011
I have a situation where I serialized data from a dataset to an xml file as a method of backup.I am trying to get the data deserialized back to the dataset.But for some reason, I cannot get the data to persist back to the DB.I don't receive any error messages either.The first chunk of code is the serialization code and the second chunk is the deserialization code.I can show that the deserialization back to the dataset is complete because this code in the 2nd block DataGridView2.DataSource = Movie_dbDataSet.movie_tb - displays the data in correct form all it is all there in the datagridview2.I call the update method but it does not get persisted back to the db.[code]
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Nov 14, 2011
I have two issues I am trying to correct...First am trying to get my listbox1 to be the selected Comport used to do the send data and get data back.
My second issue is its requiring me to send two times to get my read data back as complete data and has odd shapes with the data I get back in front of and after the regular txt.
Beware, I am very new at this so please take it easy on me... Most help I did find was for older versions I only have the 2010 Visual studio Professional...
Public Class Form1
Sub GetSerialPortNames()
End Sub
[CODE]...
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May 9, 2010
A function of my app is to encrypt a file with TripleDES. The problem is that when the app reads the data, encrypts it, and writes it back, the new data is appended. I need it to overwrite the original contents.Here is the code:
Dim
DES As
New
System.Security.Cryptography.TripleDESCryptoServiceProvider[code]............
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Nov 9, 2009
when i try to insert data from database into dataset using data adapter, it takes long time, i want to use hourglass but i'm confused how or when i type the code so user will know that application still work.
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May 14, 2012
I have tried everything I can to get beyond this error which shows below as <<<<< error here. It is trying to fill a dataset from a data adapter. If I change the SELECT statement to just SELECT * FROM xTable I get the correct number of records in each table. But anytime I try with a more complex statement I get the error message shown below which indicates System.Data.Common.DbDataAdapter.Fill(DataSet dataSet. I've completely erased all data and entered a new set of test data so I know there is no problem with relationships. Each table has primary key which is foreign key in other table. IS there something wrong with the Imports section: Imports System
[Code]...
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Aug 24, 2010
i am trying to copy data from a standard Dataset to a Type Dataset (XSD) of same table structure. i want to use Automapper to do that one. So how can i do that using automapper?
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Jun 22, 2010
I have two Datagrids, One grid has all the customers garments on it with style number and contact length. The other grid has the users who have garment issued to them. the style number is in both grids. I need to loop through the users grid and say if the contract number is 1 from the first grid then the contract date on the second grid will be todays date + 365 days (year contract) I have looked at using a stored procedure and also a for each command but I am just getting stuck with it all. [Code]
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Apr 25, 2010
I am using VB.net 2003. I am working on a stand alone windows program that stores data in an Access database via ADO.net via MS jet 4.0 OLEDb. I have progress to the point that I would like to provide the end user the oportunity to back-up the data they have stored and re-install if they choose. I am envisioning a menu item for "maintenance" with sub-items for "back-up" and "restore". I can create the menu items, but I can not find any information on how the back-up should be done.
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Nov 5, 2010
I am writing an automation program for an associated research HYPOT tester and one of my current problems is trying to split the data i recieve back from the box.Currently i have two commands i use TD? and SALL? both do the same thing but return different data. TD? when sent to the box will return the test results and of course there is no auto return when test is complete so i have to either set some kinda of timer to get the data after the test is complete or just keep pinging the box tell the test returns with either a pass or fail.my problem is when i ping the box with TD? it returns
"M11,ACW,test results{pass|fail},1.50,10.00,10ms"
What I am trying to do is use a split command to split that line into strings based off "," as my dilimeter. Currently i am useing this set up
dim resultstring as string = main.serialport1.readexisting
dimresultarray as string = split(resultstring, ",",6)
txtTestResult.Text = resultarray(2)
for the most part is does return the test results but other times it will either error out saying that resultarray(2) is out side the index or it will display one of the other strings (acw or 1.50).Is there a more accurate way to do this.I am also printing the full string pulled from the buffer into a text doc as a data log.
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Jun 15, 2012
Here's the function I'm a bit mystified by(Little rusty bitwise operators)
void two_one(unsigned char *in,int in_len,unsigned char *out)
{
unsigned char tmpc;
int i;
[CODE]...
I marked the two places that I don't quite understand. How to convert those pieces to Vb.Net.
Update: So this is what I came up with, but it's not quite giving me back the right data...Anything look wrong here?
Public Function TwoOne(ByVal inp As String) As String
Dim temp As New StringBuilder()
Dim tempc As Char
[code].......
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Jul 8, 2009
I have an xbap application that connects to a webservice to run different stored procedure. The webmethod loads the data into a data table and returns it to my xbap application. My program gives the user the option to manipulate the data. What is the best option for saving the data back to the database?
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May 17, 2012
I am having a problem with an application that displays data in datagridview depending on a selection from a combo box.The problem occurs when I want to write the data back to the database.
I get the following error:"Update unable to find TableMapping['Product'] or DataTable 'Product'."
Is this because the table in the dataset is filled in a private sub? If so how do I make it public?
Any ideas what is wrong. Code is as follows:
[Code]...
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Mar 29, 2011
I'm currently working on a program that would take the binary data from my access database and convert it back into jpeg format so I can store the images in a folder. I'm really new to VB so right now I'm pretty much stumped.
Code:
Option Explicit On
Public Class Form1
Private cn As ADODB.Connection
[Code]....
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Dec 3, 2010
I just need to edit one field on a datarow and save the changes back to the database. My database is SQL Compact 3.5
I tried many methods but change is not saved to database.
Me.taSet.Fill(Me.Dsset.tblQuestions)
Dsset.tblQuestions.Rows(1).BeginEdit()
Dsset.tblQuestions.Rows(1).Item("ExamID") = "EDITED"
Dsset.tblQuestions.Rows(1).AcceptChanges()
taSet.Update(Dsset.tblQuestions)
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Mar 25, 2011
I have an existing WSDL which returns information to remote devices using SOAP. However, I'm writing a new app with Android which doesn't support SOAP so I can't use the existing WSDL and have had to code a new app which looks for a querystring from the Android app and returns the data in a JSON packet. I've coded the module which receives the data okay but I'm unsure how to send the data back in JSON forma
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Sep 20, 2010
In a threadpooling situation is it possible for a modal form to be opened and data from that form to be passed back to the thread that opened it ?
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Jul 31, 2011
VB.NET i have only one colum in back end database that is roll. .. Now i want to update a particular data .. the data types is integer.. i has a data like 12 and i ant to update it 13 how can i do..
[Code]...
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Dec 17, 2010
I need to send data back to my Apache web server so it can be updated in it's MySQL database, I've looked at NuSOAP as it's written in PHP but man that's hard. I'm lost, is there a more simply way to send it back? even to call a webpage and send data into it?
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May 23, 2011
Basically I have:
vb
Public WithEvents PingReply As System.Diagnostics.Process
Public Sub Ping()
Dim PingServer = New Diagnostics.ProcessStartInfo
[code]....
But the event never gets called?
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Feb 1, 2010
I have a dataset (WW1Dataset) with one data table(WW1).(database used in an access database) I'm trying to filter the dataset e.g a user wants to filter by a chosen surname (SurnameTextBox.text) so the datset is filtered to display only those records wherethe surname column in the dataset matches SurnameTextBox.text.
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Apr 20, 2012
I want to change the back color of a row in a data grid view while the program is running.
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May 2, 2012
I have store the variable in
Dim Lastname, Surname, Middlename, age As String
and the data are saved in notepad. how can I put them back in their exact label.one of my lable is
lbl_surname.Text
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Jan 13, 2009
Using 2008 VB.Net trying to do serial communications. I have a Scantron scanner I can send data to it, but I can not get read data back sent to my serial port. I have tried ReadLine, ReadByte, etc. but i'm not capturing anything, and I don't understand the DataReceived event. [Code]
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Jul 29, 2009
I have three dropdown list boxes and a gridview. The gridview shows data based on what is entered in the dropdown list boxes. I have added a button that allows the user to insert a record into the database and then the page refreshes. The problem is that when the page refreshes the gridview goes back to whatever was initially in the dropdown list boxes when I first brought up the page. Is there a way to refresh and maintain the data in the list boxes so the gridview shows the same data? My code is below.
[Code]...
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Apr 25, 2010
In WPF I have one window opening a second window that allows some data selections to occur on. Once the selections have been made I then want to submit/close the second/sub window and have the data pushed back to the opening/parent window.
I can push data into the sub window from the parent via public properties, but have not worked out how to get it back the other way.[code]...
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Feb 8, 2012
What is the standard method for accessing back end data, which logon should you use? For example we have applications that require the user to login but then use an admin account to access the data from the backend.But there are also applications that require the user to login and use those credentials to access the backend data.We are in the process of creating an application that will require the user to login and would like to implement the more common method(standard practice) of accessing data.If there are alternatives those are also welcome.This will be made in ASP.Net 3.5 or higher and may include Windows Applications(VB.Net) as well.I dont want to have two sets of credentials. What I am asking is which credentials are normally used to access the Database. For example one one application may access 2 or more database's. Now would you use the same credentials they used to login to the application or would you use the admin account to access the data?Maybe this should be a seperate question but if I ended up using integrated security to access the database would the user be able to simply connect to the database using his AD account? Either through an ODBC connection and MS Access or equiv.
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Feb 2, 2012
I'm using VB 2010 Express with a local Access DB. I am having trouble determing whether there are changes in a DataGridView to save back to the underlying DB.
The DB has been copied to the project directory and its properties (by selecting it in the Solution Explorer) include Copy to Output Directory: Copy Always, so I know that any changes I make when running a build will disappear on the next build. The problem I'm having is within a run / test session, working with the application.
The Access database has the following connection string, with Application scope:
Provider=Microsoft.Jet.OLEDB.4.0;Data Source="|DataDirectory|Component MI.mdb"
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Mar 25, 2010
My problem with my project so please help me about I am enclosing my project with problem very simple but I can't found. I am using text box and listbox last two textbox i.e. txtlani and maskedtextbox.
Now the problem is when the user put the data into above mentioned two text boxes for the selected item of the list box I want to change the back color and If the user wish to leave blank that two text boxes then no change at all in the list box selected item.
In short that if Textbox leave blank then no change in the selected item back color if in the Textbox have some value than selected item back color change.[code]....
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Jul 9, 2011
Trying to find some code to assist with accessing a web service. I am a newbie when it comes to web services and don't quite get the whole how to submit the request and then read the results. I know from searches that people request a copy of the WSDL file so I have attached (SystemManagementService.wsdl)
[Code]...
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Apr 13, 2012
I am building a simple proxy in server vb.NET and so far it has been successful, but then whenever i receive data from the internet and write it back to my browser's network stream using NetworkStream.Write the received data tends to come up slowly to my browser due to reasons i do not know of. But when I chain my application to another Proxy/listener on my local computer (e.g Privoxy), data seems to come up very fast to my browser. If anyone has an answer to this I would really love to know.btw here is the part of my code {subroutine} that receives data and forwards to my browser.
Public Sub ForwardRequest(ByVal Client As TcpClient, ByVal ClientMessage As String)
Dim Browser As TcpClient = Client
Dim BrowserStream As NetworkStream = Browser.GetStream
[code]....
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