I got a problem dealing with variables: I would like in an if-then-else following
If FZ1_KaskoTextBox.Text = 1 And Grundwert_Kasko <= 10000 And FZ1_BMComboBox.Text = 9 Then PraemieKasko_KFZ1_Var1 = 169.33 And PraemieKasko_KFZ1_Var2 = 169.33 Else
But the variables don't get filled?! is there any possibility to fill two variables within one "then" ...
I need to fill a datatable(in data set) row by row by providing the the data by variables in VB.Net. The variables assigns its value by loop.. so the datatable row should be filled row by row until the loop ends. There are three columns in the table. so the table should fill with different kind of datatype variables.
View 1 RepliesThat question sounds maybe a little confusing so I'll try to explain it with an example.[code]...
View 1 RepliesLast year (2010) I came across a FANTASTIC command that allowed me to take a string of variables with a common delimiter and break it all back out into separate variables (possibly an array) with one statement.
[Code]...
As long as the delimiter was a unique specifiable character, this one-statement command could break it out into elements. my memory and point me in the right direction.
I have code, shown below, that works all except for 1 thing: The variables being passed byRef get passed, but once modified in the else section of the "if me.invokerequired" code of RecordData, the variables are never updated in the calling function. To reiterate, the calling function does not receive the updated data that is in the variables custid and amt.When debugging, I see the data change in the else section of "if me.invokerequired", but once it returns from the callback the data is missing.[code]
View 15 RepliesI define some global variables of a class as follows:
Private Class MyClass
Private var1 as Decimal
Private list1 as List(Of string)[code].....
But I found that after this form is closed, all above variables, var1, list1, list2 still exist in memory. I thought they should be collected by gc since the form is already disposed as I confirmed.
Add: I have monitored half an hour after the form is closed. But these variables are not collected by gc. I have an automatic update procedure on the form which uses above variables.Since the above variables still hold values, the automatic update procedure is always called which causes exception. (One quick fix is to check if form.isDisposed in update procedure. But I do not think this is elegeant. Besides, these variables occupy memory.)
I just want to display data of a single column from an oracle table into a datagridview or a listbox for readonly with no requirements to make changes to it. Simply display the information.What is the best way forward... To used DATAADAPTER or DATAREADER.s DATAGRIDVIEW SLOWER TO FILL THAN a LISTBOX.i am using the following code to fill datatgridview but for some odd reasons at time it is slow to display the data. I want to use listbox instead
Dim ds As New DataSet
Dim adp As OracleDataAdapter
adp = New OracleDataAdapter("select customer_name from customers")
[code].....
Does the memory used in declaring variables are reclaimed by the OS when these variables go out of scope?Does the memory used be released by setting thier value to nothing? if not, then how can I force the garbage collector to run or excecute at a certain/desired time..How about in Windows Forms..How can we make sure that the memory used in initializing and showing forms be released if those forms were closed?
View 13 RepliesQuestion 1: What is the difference between "Background Worker" and "Worker Pool" as indicated within the MSDN samples provided.
Question 2: I noticed while using, AddressOf _Function_, variables cannot be passed; what would be an efficient solution to this?
Question 3: While using multithreading is it required to invoke before setting variables, or only form properties?
Question 4: While using System.Net.Sockets is it safe/efficient to use Application.DoEvents while waiting for new data; or would be using a Do While loop be fine without DoEvents since the action would be multithreaded? Note: there can be up to 2000-3000 sockets in use at a time.
I'm new in .NET programming.I have a class Form1 that includes Button1_Click event.Button1_Click creates a multiple Text Boxies at run time)Here is the class:
Public Class Form1
Dim shiftDown As Integer
Dim counter As Integer
[code].....
I am trying to make a database, fill it with tables and then fill the tables. I am having problems connecting to the server and am really not sure why. I have posted this thread in two areas of this site because I was not sure what was the best area to put it in. [code]
View 3 RepliesI want to fill a dropdown in the pageload by using a BLL and DAL class. This is the code
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
dropBrand.DataSource = BLLManufacturer.selectManufacturers()
[Code]....
The first dropdown fills up with brands as it is supposed to do, but the second does not. The second dropdown needs to show car models by the chosen brand in the first dropdown. However the dropBrand.SelectedValue always returns 0 whatever brand I select. Without the convert toint16 it doesnt work either nor with convert toint32 or toint64.
I can't seem to get a DataTable filled.url...I'm using VB, Visual Studio 2010.I keep getting an error on this line: adapter.Fill(dt)The Microsoft Jet database engine could not find the object 'Book1.txt'.Make sure the object exists and that you spell its name and the path name correctly.The name of the file and the path should be perfectly fine, although i did change the code just a bit:[code]I read somewhere that you have to 'drag a data adapter object from the Toolbox onto a form or component'.I don't have a DataAdapter in my Toolbox.I did a right-click and selected 'Choose Items.It is nowhere on the .NET Framework Components.
View 4 Repliesi was trying to fill my conninfo to apply it to repdocument
View 2 RepliesHow to fill up the AutoCompleteCustomSource List with the query results using Data reader in vb.net ?
An example code needed.Edit 1:This is what I have tried and its not working Private Sub cbEmployeeNo_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cbEmployeeNo.Click
cbEmployeeNo.AutoCompleteCustomSource.Clear()
[Code]...
first, I'm very new to VB so please excuse my ingorance. Second, thanks to this forum, I've gotten quite far on my first project, so thank you. Hopefully someone can point me to the right direction on this last part.I have an XML file located on "C:XMLfaxappxml.xml", contents looks something like this:
<PORT_REQUEST>
- <END_USER>
- <ADMINISTRATIVE>
[code].....
I have a class witch has a number of properties of type "string" and "integer". I also have a list(of MyClass) witch I want to display in a listview.
What are the steps I must follow? Should I specify the colums manually?
Dim blackPen As New Pen(Color.Black, 3)
Dim ptsArray As PointF() = {New PointF(100.0F, 120.0F), New PointF(70.0F, 60.0F), _
New PointF(40.0F, 120.0F), New PointF(100.0F, 120.0F)}
e.Graphics.DrawLines(blackPen, ptsArray)
I have the outline of a triangle right where I want it. I need to fill it so it's a solid color. Can anyone give me a start on filling it? (Using VB.NET 2008)
Quote:Dim con As New MySqlConnection
[Code]...
my code is correct and it displays username in the combox my problem now is i want also display the password on the textbox2. if i choose one of the username in the combobox list. the textbox2 will be automatically fill based on the record on my database??
Aim to Achieve : I want to have 3 different dataTables from 3 different SQL queries from 3 different places into 1 single DataSet which I will have to return form my function.I have :
Private Function getDataSet()
Dim ad1,ad2,ad3 As Object
ad1 = New Data.OleDb.OleDbDataAdapter(query1, conStr1)[code].....
I want to use the best possible implementation of above task.
i want to fill a Datatable with a Datareader row by row but get an exception because the reader's columns have a different order than the Datatable's columns.
Why and how does a Datatable loads itself with a Datareader correctly, even so it has a column collection with different order?
I need to calculate values for every row so i dont want to load the Datatable completely but row for row. It has 25 columns so i dont want to set it all manually.
There must be a chance to load/fill/add a new row from a datareader without having the same column order(reader.GetSchemaTable?).
Following is what i have but what doesnt work:
Using reader As System.Data.SqlClient.SqlDataReader = command.ExecuteReader
'next line works(configInfo.DataSource is a Datatable)but is inappropriate
configInfo.DataSource.Load(reader)
[Code].....
filling an OleDbDataAdapter.I have:
Dim cmd As OleDbCommand = New OleDbCommand(myQuery), myConnection)
Dim da As OleDbDataAdapter = New OleDbDataAdapter()
Dim dtDonnees As DataTable = New DataTable()
da.Fill(dtDonnees)
Filling takes too much time.For 20 lines it takes 20 seconds.And for 130 000 it takes a little more (but not 130 000 sec).But 20 seconds is too much anyway.
Question part 2: can I skip fill?I mean, after filling the datatable, I do a for each row of datatable and cast into an entities:
Dim returnList As New List(Of myObject)(dtDonnees.Rows.Count)
For Each rowDonnee As DataRow In dtDonnees.Rows
returnList.Add(New myObject(rowDonnee))'set every data of the row into my new object
Next
Can I pass each row of OleDbDataAdapter?
I am trying to add a parameter to a sqlDataAdapter. I have tried to use parameters.add() but the adapter is not a sqlCommand. Here is some of my code.
Private Sub convertToCSV(ByVal SqlQuery As String)
Dim Dt As New DataTable()
Dim SqlCon As New SqlConnection("Data Source=db;Initial Catalog=productionservicereminder;User Id=id;Password=pass;")
[Code]....
Basically I am trying to do something like this:
Ada.Parameters.Add(New SqlParameter("@pgid", pgid))
Using Visaul Basic 2010; the program auto fills a web page displayed in the WebBrowser container on the form (with the value contained within TextBox2) as follows:
[code] WebBrowser1.document.GetElementById("frmLogin:strCustomerLogin_pwd").SetAttribute("Value", TextBox2.Text)[code]
What reference is needed to to replace 'WebBrowser1' so that the Current browser window can be accessed, be it IE or Firefox, so that the same could be achieved?
I am new to visual basic 2008 and am trying to navigate to a web site and automatically enter my username and password from within a visual basic program. Then I want to navigate to another page and fill data in various fields on the page.
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I followed tutorial here[URL]..The form runs but I cannot fill it Update: There's no error message I just can't enter the field to type anything: it's read-only
Update 2: I ask the gurus on Microsoft Forum, they tried to answer hard, nobody can find out why. Seems beta is very beta Weirdly I did have this problem on a windows 7 PC not on a Windows 2008 pc
I am using the following to strip out unwanted string in a string and i want to fill newly created column with split value. I dont know how to get the "Cityrev" into a column value[code]....
View 4 RepliesI am trying to fill a combo box from SQL Server 2008. Getting the Combo Box to populate isn't the problem. What I need to do is have the text field read the field value that goes with a specific id that I search by, while keeping all other fields available to chose from to change the value for that specific id and save back to the database. I know this isn't clear here is the best example I can think of:
COMBOBOX --FieldValue------->
--DropDownField1--> Ten
--DropDownField2--> Twenty
[Code].....
I seriously might have to infest in some Rogaine if I have to spend another ten minutes on this. I do know that I am missing an id to compare to but when I add the id into the sql statement the combo box only fills with the one value that it equals to without the option to chose from the several others to change.
I want to fill the both combobox in this website [URL]
I can fill the main category but I cannot fill the subcategory, I already tried but I cannot.
I am trying to fill my DataGridView using a date for my parameter. My first problem was in my code where I would get the common error message of Too many arguments to public overrides overloadable. I solved that error message by going into the dataset designer, selecting the query and adding RegDate as a parameter. Now my problem is that I will enter a date in my tool strip text box click the button and still get my data grid view filled with all the data.
Try
Dim RegDate As Date = CDate(RegDateToolStripTextBox.Text)
Me.PatientsTableAdapter.FillByDate(Me.Database1DataSet.Patients, RegDate)
[code]....