C# - Efficient Data Conversion Using .Net

Aug 1, 2009

I am working on an application that will need to read tons of records (close to 500,000) from one table and insert them into another set of tables in the same database. I though about using SSIS package for this but our DBAs don't want to use that. Now, I am thinking of a multi-threaded approach. I am thinking that I can have a few thread started that will read say (500) records at a time and insert them, then come back and read more.

Now, say I spawn off 3 threads of this application. The first thread reads 500 rows and starts processing them. Can I lock these rows that were already read so that the next thread does not pick them up? I am trying to find some articles regarding this on the internet, but perhaps I am not searching for the correct terms in Google.

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File would then be reformatted to show the corrections made. Some kind of data entry window is envisioned. As far as number crunching goes, I would like to make counts of each number in each of the columns , calculating averages, times since last drawn and so on.

Without being too long winded, I would eventually like to find triple combinations and maybe use them as predictions. So there you have it. This way I won�t have to go off on the wrong path, on a data structure that may not be able, or be too slow for the tasks at hand.

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VS 2010 Conversion Failed When Converting The Varchar Value 'System.Data.DataRowView' To Data

Jul 15, 2011

Im getting that error in the da.Fill(ds)

Imports System.IO Imports System.Data.SqlClient

[Code]...

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1
34
765

[code].....

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C++ - Conversion - Not Quite Giving Back The Right Data

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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Oct 26, 2010

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Option Strict On
Module Module1
Sub Main()

[code].....

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This is what i`ve written so far :
Imports System
Imports System.IO.Ports
Imports System.Text

[Code].....

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VS 2010 Data Manipulation And Conversion?

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I have eight text boxes each can have any numerical value only consisting of the numbers 1-8 up to eight digits each. No 0's or 9's. I am using a timer to loop through the sequences of text boxes at a given rate. This is already configured.

Now here's the hard part so bare with me.I need to output the first value of a text box, wait some time then output it's counter letter (below the number on the keyboard), go to the next text box and repeat. Example:

[Code]...

Ultimately I'm trying bring my PC Interface project up to date by going from a parallel port to USB. This will be the "Custom Loop" function for the device.

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[Code]...

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I'm writing a C# application that reads data from an SQL database generated by VB6 code. The data is an array of Singles. I'm trying to convert them to a float[]

Below is the VB6 code that wrote the data in the database (cannot change this code):

Set fso = New FileSystemObject
strFilePath = "c: emp emp.tmp"
' Output the data to a temporary file

[Code]....

The problem here is the VB6 binary to string conversion. The VB6 string char is 2 bytes wide and I don't know how to transform this back to a binary format I can handle.

Below is a dump of the temp file that the VB6 code generates:

And here is the dump of the data as I read it from the database in (=the VB6 string):

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myconnection.Open()
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myreader = cmd1.ExecuteReader()
While myreader.Read()
[Code] .....
But I get the following error:
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Why would you use Ctype over the others?

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[Code]...

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CODE:

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How to use MVC Pattern efficient?

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Is there a more efficient way of doing this code?

For Each row As DataRow In dt.Rows
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For index As Integer = 1 To 9[code]....

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[Code]...

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'SQL Insert: Product table
Dim sqlInsertProduct As String = "INSERT INTO Product (ProductName, Status,
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[Code]....

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[Code]...

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Is It More Efficient To Use UInteger Instead Of Integer

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I have a program that must initialize a table that is usually about 10-15 thousand records. I have attempted several means to empty the records from it, but it always takes several minutes to accomplish the task or in some cases like a 'bindingsource.clear' command, doesn't work at all. I currently have it working using a simple loop to go through each record at a time and 'removecurrent'. but this seems extremely inefficient and it is quite slow.The real time consumer seems to come in with the tableadapter.update and tableadapter.fill that happens after the loop.[code]

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Here is my plan:

Completed: Outlook VBA to monitor all incoming email for specific message. Once message is received drop attached .txt file in a specific network folder.

Completed: (VB.net) Monitor folder, when text file is added begin processing

Not Complete: (VB.net) Import text file to Excel

Not Complete: (VB.net) Format Excel Text file.(add in a row of data,format column headers with color/size, add some blank columns, add data validation to some of the blank columns that allow drop down selections)

Completed: (VB.net) Save file.

Completed: (VB.net) Send file to list of recipients.

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The way stated above. Import to excel -> format Having a template excel that contains all of the formatting already done for me and attempting to transition the data to this document (no clue if/how I can do this). Is it even feasible? Have the template already created and then import the text file to a new excel file, then transition that data to the excel template?

Something I thought about, in terms of formatting the document, was to record a macro of me doing all of the formatting that I'm going to need and then attempt to convert that macro into my vb.net code, but I'm not sure if that will work. I will need to verify that the text file comes in the EXACT format every time correct?

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What would be the most efficient way to combine the two into a single List(Of String)?

Edit: While I love the solutions everyone has provided, I probably should have also mentioned I'm stuck using the .NET 2.0 framework.

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