i making a website for trading in which trading feed coming from a source in excel sheet. i have to show data from excel sheet to gridview. but when i make connection it will lost due to rapidly data( in excel sheet each cell change value 1-3 times in one second).Am using Ajax Timer of interval 1000.
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i am making a website for trading, with trading feeds coming from a source in an excel sheet. I have to show data from the excel sheet in a gridview. When i make connection it will fail due to rapidly changing data; each cell in the sheet changes value 1-3 times per second. I am using an Ajax Timer of interval 100. Here is my code:
[Code]...
As a brief summary, I have an issue writing a program. A part of the program has a While loop that is supposed to change some labels to random numbers every iteration of the loop. But, instead of all that, the labels just turn blank until the end of the loop is achieved, and only then is the random number written.
While (o < 3000)
r1 = Rnd()
str1 = CStr(r1)
Label1.Text = str1
o = o + 1
End While
I developed a winform application and I want to send the .exe file to someone else. That means that my datasource for my connection string is not the same any more
Dim da As OleDbDataAdapter
Dim dt As New DataSet
Dim objConnection As OleDbConnection = New OleDb.OleDbConnection
[Code]....
I have tried everything.but im not able to insert updat and delete the excel file..im able to connect the excel sheet.the connection also seems to be opened...here s my connection string:
Dim sConnectionString As String
Const kunal = "C:"
sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
[code].....
how i can make a connection of data base with access
View 1 RepliesI have an application in which i have to load the grid using MS Excel and save that excel to Sql Server.
View 2 RepliesI m writing my first ever application.I want to make a data search engine exactly same as the excel sheet has.The search form is a owned form and has one combobox to specify the search criteria that in which column of the database table i want to search and a textbox to write the search item.What i want is when i type 'A' in the textbox and click the findAll button the search result should display the first matched record in the textbox of owner form and then if i click findNext button the search result should display the next matched record.Same like excel Find and Replace Window.
View 1 RepliesI'm trying to change my connection string to w/e the user wants. After a few tips here and there, this is what I've come up:
1: In my settings I've added - Name(login), Type(String), Scope(User), Value(Nothing)
2: Here is the code I'm using
Private Sub LoginForm1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Here I'm checking if the login in my.settings is there
'If not, I'm going to let the user choose what database
[code]....
The error I get is: Format of the initialization string does not conform to specification starting at index 0.here -
Dim con As New OleDbConnection(My.Settings.login)
When I have my con equal to when I added the datasource from it works.
im currently working on my thesis and i just wanna know how to avoid changing connectiong string? we are 4 members in a group each time that my other groupmate try to run our system in their own laptop/desktop they always change the server name. i wonder what if we implement our system in any computer? how were going to handle that?
View 1 RepliesFor example i have form within the application which shows the connection string in a text box so the user can change it to there database but i cant work out how to save the new string to the connection string within the app.config file
View 1 RepliesI have a VS 2008 .NET application which connects to many tables within a SQL 2005 database in order to fill controls using multiple DataSets and TableAdapters.how to appropriately change the database connection within my Visual Studio .NET 2008 application in a manner that will provent having to modify the datasets and tableadapters. Will changing the connectionstring shown in the DataSet/TableAdapters properties render them unusable?The tables within the production database are identical to the tables in the development database.
View 5 RepliesI have specified my connectionstring in My.Settings
But when I want to change it at runtime I get the error: Property connectionstring is read only.
Is it possible to change the connectionstring at runtime???
I used the following code:
[Code].....
I have a connection string in my app.config:
Code:
connectionString="data source=.sql2008 ;Database=Database1; Integrated Security=FALSE; Persist Security Info=True;" />
How do I change to another database (one of many) without using multiple strings? Can I change while the connection is open?
Code:
Dim myConn As New SqlConnection(System.Configuration.ConfigurationManager.AppSettings("ConnectionString"))
I added an .xsd file to my project using the IDE After that, I right-clicked and chose Add->Query I chose a dummy connection and then >SQL statement->Update Then I changed the Query's modifier to public
Dim ta As New dsCC2000TableAdapters.UpdatesTableAdapter
ta.UpdateQueryTest()
The problem is... I can't seem to modify the connnection object at runtime (by using ta.connection = XYZ) It doesn't show up on ta variable's intellisense!
I added an .xsd file to my project using the IDE After that, I right-clicked and chose Add->Query I chose a dummy connection and then >SQL statement->Update Then I changed the Query's modifier to public
Dim ta As New dsCC2000TableAdapters.UpdatesTableAdapter ta.UpdateQueryTest() The problem is... I can't seem to modify the connnection object at runtime (by using ta.connection = XYZ)It doesn't show up on ta variable's intellisense!
This is regarding a windows app in Visual Studio 2005, a VB Windows application.'ve stored a connection string called strSQLConn in My.Settings. I'm trying to change the Server in code. I set a string variable called strConn to a new Connection string. My.Settings.Profile2006sql = strConn
This produces an error saying that My.Settings is readonly. I'm missing something basic here.
I don't know if this is the best way to change a connection string to toggle between a development server and a production server. My understanding is that if the setting Connection string is changed it will be used as the default for all the table adapters in a strongly typed dataset. Is that the case?
I am looking for a tool that would allow me to use LINQ and build a .Net app rapidly.
View 3 RepliesI have a project that is executable and I created a dll, which includes commonly used datasets among projects (DLLforApp and App). [DLLforApp]a separate project from App but in the same solution.this is a class library project which creates a dll file this has aconnection string which is LforApp.Properties.Settings.Default.ConnectionString[App]another project in the same solution.this project includes a reference for a set of datasets.. which is DLLforAppThis project also has a connection string which is the same as DLLforApp
View 2 RepliesI have two seperate databases, one is production the other is test. Before LINQ, I could simply change the connection string to swtich db's. However, the string is read only, and I have no way to change the string.
How can I change the Connection String programmatically?
Edited for Clarity
Im using my.settings to store all of this inforomation
I'm using sockets to connect to servers and for some strange reason I can't identify, the socket is taking several seconds (5 maybe 6) seconds to connect when using an IP whereas is instant when using a hostname. Here is my code to connect:[code...]
In the above code, server of course is a string. I've tested this with a friend and she's experiencing the same issue and I'd like to get around it as it's sort of annoying..While debugging GetHostEntry is the line that seems to take forever when using an IP.
I have a simple scraper. It works on some websites, but on some there is this Error:
Quote:
IOException was unhandled Unable to read data from the transport connection: The connection was closed
It is occuring at "Dim htmlresults As String = Urlcontents.ReadToEnd()".
'Create the HttpWebRequest object
Dim req As HttpWebRequest = WebRequest.Create(URL)
'Set the timeout to 1 second (or 1,000 milliseconds)
req.Timeout = 10000
[code]....
I am trying to do something fairly simple.. allow my user to import thier data from Excel into SQL Server, where it can be used by the application.To do this, I'm using the fairly simple code that is common everywhere I look:
strFilePath = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fdlgFileOpen.FileName + ";Extended Properties=Excel 8.0"
connExcel = New OleDbConnection(strFilePath)
connExcel.Open()
[Code]...
Now, on my development computer this code works perfectly. The data imports, and I can go on my merry way.
On the TEST computer, this code throws the error: "ODBC -- Connection to {SQL Server} servernamesqlservername failed." This seems very odd to me, because I'm using exactly the same SQL Server and database to interact with the application, and all the other screens in the application work perfectly. The test computer CAN connect to this SQL Server, but it keeps throwing this error whenever I try import data from Excel.I've tried everything I can think of - using the server's IP address instead of the server name, sending the SQL Server administrator data along with the request, taking out the Trusted_Connection=Yes... nothing works. What is going on here? How can this code work fine on my computer, and hiccup on another?
I've created two forms of which two separate datasets/tableadapters were created by adding a datasource and dragging and dropping the fields onto my form.I was testing the program using a db that was located on my local drive. Well after publishing the app to the users machines, I noticed that the binded information was still being pulled from my local machine and not the database that the user is working off of.I've set the connection modifier properties for both tableadapters to Public, and I have written the following attempting to change the connection strings:
Private Sub btnSaveSettings_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSaveSettings.Click
Dim pap As New frmPap
My.Settings.dbLocation = txtSettings.Text
[code]....
I am working on a program that is rapidly growing. After the login screen, I have to wait about 10 seconds before the main form shows up. I want to add a loading or splash screen in that time, but I am having a lot of trouble having two forms launch at once.
View 2 RepliesI'm using VS 2005 and I've created an Excel spreadsheet and written a lot of data. I've also modified some of the cell interior colors via commands like this:
objWorksheet.Cells._Default(Bline + 2 + i, 1).Interior.Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.White)
But what I am finding is that the borders are getting wiped out.
[code].....
I have been changing my existing code over the past week and have not successfully been able to export to excel in the format that the users are request. I am new to this job, learning vb through training videos, and have been given the task to update problematic old code and interfaces.The users cannot export large amounts of data. They receive a runtime error. The users do not want the export to html.The users do not want the controls to be exported.
[code]...
I have a problem reading data from an RFID-reader. I connect to the reader by tcp and wait for DataAvailable to be true, then reading the data until I got a end of data character. Then I just go back and waiting for a new DataAvailable. This is done in a own thread for the function.
There seems to be some kind of timeout, If I don't got any data in a couple of minutes, then it just sits there in the do/loop waiting for DataAvailable. I hold the card to the RFID reader, it beeps, but there is no data available. I don't get any exeptions, and the information says that the clientsocket is still connected. Are there anything more I can check?
If I put the card to the reader in a minute-interval it seems as this will never occur. So 2-3 minutes idle:ing seems to do this.
Here are my code to read data from the socket, I have taken away some irrelevant code:
Sub test(ByVal ip As String, ByVal port As Integer)
' this sub is meant to run forever
[CODE]......................
I am writing some data from database to the excel via visual basic.net.I need to change background of some cells and also need to make text bold. I need something like that :
xlWorkSheet.Cells(rownumber, 1).BackgroundColor = Color.Yellow
xlWorkSheet.Cells(rownumber, 1).Font.isBold = True
Of course none of above is works.How can I achieve this?
Error14Option Strict On disallows implicit conversions from 'System.Windows.Forms.TextBox'to 'Microsoft.Office.Interop.Excel.TextBox'
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