I'm only getting started with VB.Net, using VB Express 2008.Using the System.Data.SQLite wrapper, I need to read data off a SQLite database file, and chart data using basic bars, pies, lines, etc. Nothing fancy.
View 1 RepliesI'm only getting started with VB.Net, using VB Express 2008. Using the System.Data.SQLite wrapper, I need to read data off an SQLite database file, and chart data using basic bars, pies, lines, etc. Nothing fancy. Which component would you recommend, either open-source or affordable?
View 1 RepliesI'm writing a program that needs to parse data from a SQLite Database, I have the reference DLL but I do not know the proper syntax for the actual parsing of the file. The reference I have is located at [URL]..I don't really see any code that would need to be given seeing as the code for that class is currently something link:
Imports System.data.SQLite
public class SQLite
public sub Retrieve_Data
end sub
public sub Connect2SQLite
end sub
end class
I have a chart control (stacked chart to be more precise) and a datatable that contains 3 columns. I want to bind them into a stacked bar chart. below is what the datatable looks like:
[Code]...
I would have the Resource column as the x-axis, and the value (hours worked) of each Queue as the y-axis (stacked)I've tried just binding normally and I'm getting an error saying that it's the wrong data type.
I have problem with my application I have a table with 3 columns: column1(numeric(18,0), allow null), column2(nvarchar(255), allow null), column3(datetime, allow null). I want to read data from a .csv file and insert it into database. I use 'bulk' to insert data from file .csv into database instead of inserting query. But the problem is: the .csv file have to be formatted as:
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what I am trying to do is i have a table with four records and I want to write it to a txt file. I am running sql server 2000.I am able to connect to my database and I am able to right data to a txt file my only problem is it always returns the 1st row of data.
Dim FILE_NAME As String = "C: emp est2.txt"
Dim conn As New SqlClient.SqlConnection
Dim da As New SqlClient.SqlDataAdapter
[code]....
i am making a window application using visual studio 2010 and vb.net. i want to make charts daynimacilly using data from the database. how this can be done?
View 3 RepliesI'm trying to read a BLOB from a SQLite Database.
View 3 RepliesI am using VS2008 and SQLite. I have created a database and several tables and am attempting to populate the tables with data from arrays.
The following code (example) works fine but stops after it inserts 30 to 50 records. I am running the VB code in debug mode and when it stops, I press pause to see where it is. It stops on "SQLcommand.ExecuteNonQuery()" and when I press continue (F5) it will insert another 30 to 50 records.
I do not get an error message. Is this a timeout issue? How do I keep the loop running to the end of the array?
Following is example code.
Dim
SQLconnect As New SQLite.SQLiteConnection()
Dim SQLcommand As SQLiteCommand
CODE:.....................
I try to find the example for reading data from USB Joystick using VB2010 but I couldn't. .
I found some but all were VB6.0.
Do I need to install DirectX or which component should I use. I can read data from mouse and keyboard.
My requirement is to graph (scatter graph) data from 2 arrays. I can now connect the data from the array and use it on the chart. My question is, how do I set the graph's X- and Y- axes to show consistency in their intervals?
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When i'm tryed to print Data chart the resolution of the chart changed as shown:
View 3 RepliesI am trying to make a script to spit command lines to a bat file to compress a bunch of files singly and then delete the original ones. I am sure that is easy to most of you, but I living a ____ trying to do this. A have a file list like this one belo, which was created with a command -- Dir /b /s /a-D N: > filelist.txt
[Code]...
read lines in a file, split the lines and spit the result to another file
View 2 RepliesI have 20 lines of data in a textbox which I need to split up using the following [code]...
View 3 RepliesIm working on a HSD 32 bit data bus to serial converter via a microcontroller. Now first I want to make a sort of data sniffer to read the data bus (32Bit) .All on the controller side is working and the stream of bytes are coming in via RS232 as 4 bytes in HEX like FD,A5,45,8B . I already converted the bytes in Dec and ASCII to determine what is passed true the bus and how fast and stuff.. Now that is all correct and working very well if the LSB (least significant bit) of the 32 data bus is Data line 0 and the MSB (most significant bit) is Data line 31 but if that is not the case I need to invert the 32Bits (like as I would invert the connector on the bus) . How do I best do this using the 4 bytes I send from the micro controller.
Example:
(MSB) 01001000 01100101 01101100 01110000 (LSB)
HEX= 48 65 6C 70
DEC= 72,101,108,112
ASCII= H E L P
I need to invert it with a button to:
(MSB) 00001110 00110110 10100110 00010010 (LSB)
HEX= 0E 36 A6 12
DEC= 14,54,166,18
ASCII= (SO) 6 : (DC2)
I was wondering how to get a certain data from a MS database and display in a label. Example(Database entries)
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The name will be displayed in the label depending on the year and number typed in two text boxes. So if typed 2009 and 1001, the label should display name2. I don't have any background on SQL. The only thing I did for now is that I added the database in the data sources and added a TableAdapter.
I am trying to Save my data into Local Database (*.SDF or *.MDF) but i due to some reasons i can not do it. I have seen 100s of Video on it and tried all possiable ways, but still my data is not saving into Local Database. and i do not get any error messages. However i can save my data into SQLEXPRESS database. i am using Visual Stodio 2008.
View 2 Repliesimagine an array of data containing a gray scale image and you want the bar chart (say 20x20) to display a section of that image as both the magnitude of the data and its shade of gray. if you were to look vertically down on the 3D barGraph you should see the section of the image. Is this at all possible? The projetc relates to clutter intensity in a radar image if this interests you.
View 2 RepliesTo populate my database I have been using the builtin SQLite command for datetime:INSERT INTO samples (timestamp, sample_value) Values(datetime('now','localtime'), ...)When I look at this on my Mac using a SQLite Reader called Base I see the following timestring:
View 1 RepliesI'm creating a VB.Net application that stores data in a SQLite backend. The data comes in excel workbooks that the user can import from. Each workbook has one worksheet (about 30,000 rows) that gets reformated a bit and imported to a new table. What's the most efficient way to do this?
I'm currently reading in the entire range from Excel into a 2D array. Looping over the rows in this array and adding each row to a long SQL statement that gets executed every thousand rows. But this is painfully slow both on the looping through the array bit and the pushing to the SQLite step.
Code below:
'First open the xls reformater book and read in our data
Dim xlApp As New Excel.Application
Dim xlWorkBook As Excel.Workbook
[Code]....
[URL] to create my sqlite db file. I created it as a sqlite db version 3 file. When I go to open the connection
[Code]...
I'm a complete novice with VB and any coding in general, but as life will have it, I have to create a program for my Final Year Project at university.In short, the idea is to open a file that has many lines of numerical data, then select the required lines, do some calculations on them and write it into a new file, but the new file must have its own format and the calculations must go into the correct lines.
Im struggling really with how to get it to read the file and then write the new one. Currently I have it so the user can open the file and it will display the data into a text box. I want to then be able to click another button that will convert that data into a new type, and in turn display that in another text box. Then have a save button to save the newly created data. This is what I have so far...(it's not much.I havent really got much of a clue what I am doing lol)
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Here's what i've got so far, i've written all of the data that i'm going to put into my config file, however i'm having trouble reading the specific string values that I need from that ini file. The parts of the ini lines I want to get are the values in between the I've tried using streamreader a couple things but i'm having trouble figuring that out. I need to parse each line of the ini file to get that value in between the single quotations, so that I can set the value for my richtextbox background and text color as well as a few other things that i've set up in my notepad including tab spacing and so on. lots of these different values need to be converted from a string value to integers, and boolean values as well. (4 of them, the rest of them don't have to be changed because they are already string values when my application reads them to determine it's application load settings.
EDIT: I just noticed in the preview that this is from the version of the app where I had streamwriter write "______ value=" & Something to a file. lol some of the (')s are still in this version, so please excuse that little part. I had them in, but took them out so that I could trim data to get a value easier, but I want to use (')s hopefully when all is said and done.For example, just to restate what I want - in the ini file it will read [setting name] value='VALUE'I want to be able to "get" the string value of "VALUE" within the ini file between the 2 single quotations '
i have here a form2 i want to view the data's by using a vscroll bars. but when i drag the tool vscrollbars, it cannot go up and down.
View 1 RepliesI have a database called "IMYS" and a "Customers" table in it. What I want to do is: Define a variable like "Last_Name" and retrieve last names of customers one by one. I've tried this before (and, it doesn't work for me):
===
Dim Last_Name as String
Dim I, K as Integer
Dim CustomersTable = New IMYSDataSetTableAdapters.CustomersTableAdapter
[Code]....
I have two Combo-Boxes like this
I need to create an auto-fill feature for the 1st Combo-Box. It should list the EmployeeID if Search-By Field is specified as Employee-Number. Similarly it should list Employee First Name along with Last Name if the Search-By Field is Employee-Name.
How can I do this? I have no clue, I am doing this for the first time. I am using SQLite, Visual Studio 2010.
Dim mySelectQuery As String = "SELECT " & Search & " FROM EmployeeTable WHERE Status LIKE '" & Status & "'"
Dim myConnString As String = "Data Source=" & Application.StartupPath & "DatabaseSimpleDB.db3"
[Code].....
I'm getting some problems to read a text file with this configuration:
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I want to put all 3 lines in a data grid view.
I have a set of x, eg 288, data values. The user wants to fit a regression to a subset of this data, eg (2 - 200), then she wants to analyse within a subset of this fitted range, eg at 20 and 100. So, on my form are four Hor. Slider Bars, to set the lower and upper bounds to the fitting and the analysis. The two that set the lower bounds work fine. The two that set the upper bounds are getting corrupted somehow outside of my code and I do not know how to solve this problem. What happens is that when I click on the right hand arrow on the slider bar, the program runs through my function with the correct values whilst the arrow is down, goes out of my code and then immediately comes back into my code, but with the wrong value set into the Hor. Slider Bar fields that I am working with, eg the .Value field. The new value is always 9 below the maximum that it can be, but I can see no connection to this number.
View 1 RepliesI am a student and trying to start a programming career, my colleague asked me to make a multi tier or multi client desktop application for the schedule tracking using xml as a database; however the desktop application would be deployed in one or more computers but my leader can monitor the info from her office in addition she wanted me to put administrative privilege to avoid unauthorized access in some database features of the system. an info regarding multi-client desktop app.
View 3 Replies