I dont want to be setting the index positions and lenghth to a specific number becuase when i choose a different name from the listbox that is at a different position or longer it wont display it properly. explain to me another way around this so as it will allow any details to be selected and read???
[Code]...
For a project I need to do a String strX is said to be a cyclic rotation of a String strY if it's possible to rotate the characters in strY by some number of positions, n, such that strY becomes strX. I don't mean rotate in a Caesar sense here but in a left-right (or right-left) sense. For instance, strX = abanan is a cyclic rotation of strY = banana because rotating the characters in banana to the right by n=1 (i.e., by one position), wrapping accordingly, yields abanan. Similarly is strX = anabana cyclic rotation of strY = banana because rotating the characters in banana by n=3.I need to write an application that returns True if strX is a cyclic rotation of strY otherwise the result is False. I'm looking into how to do this, I know it will involve and if then statement and possibly some loops. Is there anyone who can help me better understand what I should do?
View 4 RepliesTrying to input a high setpoint, low setpoint, a % load, and number of compressors, then calculate the temp that all compressors are off. Then build a datagridview with the staging of compressors from all off to all on for each compressor up to 10 compressors.I am trying to insert headers from 1 to 10 compressors (Variable) with the text "Comp1", "Comp2", etc....Two rows with header. I am trying to use an array with index number to insert the text, but that is where my problem happens."Index was out of range".Here is my code
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim i As Integer, num1, num2, num3, num4, alloff As Single, stg As Single
TextBox1.Focus()[code].....
I have been working on recoding a VB6 client/server application of mine and have run into a bit of an issue with storing the players location on the tile map which means I will need to rework the way I am storing the user connections. In my VB6 application I would store the user's numeric index/socket number/whatever you'd like to call it as the Key, however, in VB 2008 I can't seem to find where, or if, the numeric index is stored. If this isn't possible then does anyone have an example of how they store user connections using some numeric index as the key of a hashtable?
View 6 Replieshow i could get the icons positions i made some code to get the file names and everything but wanted to know how i could get there positions! also i found some codes with google but most of them where in vb6?
View 10 Repliesi am a beginner in vb8 i have a text file named alarm.txt,sample alarm.txt file is shown below
can someone help me to read the alarm.txt file and extract data.for eg
[Code]...
I can assign my user settings this way:
MySolution.Properties.Settings.Default.settingname1 = "mystring1";
MySolution.Properties.Settings.Default.settingname2 = "mystring2";
...
MySolution.Properties.Settings.Default.settingname300 = "mystring300";
[Code]....
I am new to .net and am wondering what Index is in .net. In vb6 I could set a index value to any object and then duplicate them and use the same code. Does .net have something like this?
View 3 RepliesI am trying to get an index of a List(Of Details) Details being a class i use instead of an annon method. Is it because i am using array.findindex when it's not an array but a list(Of???
Dim index As Integer = Array.FindIndex(Details, Details.FirstOrDefault(Function(nd) nd.Name = "name"))
Error1Data type(s) of the type parameter(s) in method 'Public Shared Function FindIndex(Of T)(array() As T, match As System.Predicate(Of T)) As Integer' cannot be inferred from these arguments. Specifying the data type(s) explicitly might correct this error.
I can't seem to set the selected index or selected value of a DataGridView combobox when loading data from a database. My DGV has two combobox columns which are bound to datatables. The DGV itself is not bound initially. After adding a row, I select a value from each combobox which then populates the rest of the cells in the row. I'm using the EditingControlShowing event to add an eventhandler to catch the SelectedIndexChange of the combo boxes. This all works as needed. My issue comes when populating the DGV with saved data, I need to add the rows and set the selected index and/or selected value of each combo box. I've searched through various forums and articles for the last week with no luck.
I'm using VS2008 sp1, .NET 3.5 sp1 and SQL 2005 sp2 Express.
I have a datagridview with 3 columns. The second column is a combobox which I want to bind with a dataset. How do I go about setting the column index for it as I am doing something like this.
Dim ComboCol As New DataGridViewComboBoxColumn
ComboCol.DataSource = SDS.Tables(0)
ComboCol.ValueMember = "Specie"[code].....
I want the solution to move to specific control by providing Tab index through coding. Is there any way that i send tab key through coding and cursor move to or focus set to next control?
View 5 RepliesI'm trying to copy only the first 15 characters(Including spaces) of a string from TextBox1 to Textbox2If the Text in TextBox1 is:abc1234 jklmnopqrst/uvxyThen the Text in TextBox2 should read as:
View 7 RepliesI've got the web browser with tabs in all working fine, but there's one bug, i can add tabs, delete em, etc.. but when i delete a tab then go to create a new tab, it gives me the error: InvalidArgument=Value of '6' is not valid for 'index'. Parameter name: index '6' is the number of tabs i had open.Here's the bit of code i use to create the tabs with the browser in it:
vbcode
Dim browse As New WebBrowser
browse.Name = "b1"
browse.Dock = DockStyle.Fill
[code]....
When the selected index changes I for a second time this code errors.
vb.net
lvReports.SelectedItems.Item(0).SubItems.Item(2).Text
with this error message
InvalidArgument=Value of '0' is not valid for 'index'. Parameter name: index
Why is this?It worked for the listviews.click event perfectly.
Sometime in VB.net i have something like:[code]But if i need the index number, i have to change it to [code]Is there another way of getting the index?
View 2 RepliesI want to set Color to specific cell in DataGridView as in this code , but didn't accept BackColor property.
Form1.DataGridView1.CurrentRow.Cells(3)......BackColor
Let's say I have a textfile which contains paragraphs. Some of the paragraphs start with * or a > character. How do I index the words that start with these characters?
Example:
[code...]
I am having problem setting focus on specific cell in my Datagridview1 . On Form1 when clicking on cell 3 in any row, I am callig a Dialog1. However, when done working with it, and closing the Dialog1, the focus returns to cell 3 in my Datagridview1 . I like to set the focus on the next cell(4) making it the current cell.
I have tryed :
DataGridView1.SelectionMode = DataGridViewSelectionMode.CellSelect
DataGridView1.CurrentCell = DataGridView1.Item(4, e.RowIndex)
DataGridView1.CurrentCell = DataGridView1.CurrentRow.Cells(4)
And few other things, I am always getting this exception: Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function.
I need to find out how I can get the index number of a brand new row I just saved.
The table is set up with primary field as Identity (It auto generates the number
in column(0)- "DoorID")
Eg:
dim ds as dataset = DoorsData
dim dt as datatable = ds.Tables("Door")
dim dr as datarow = dt.new row
dr.item(1) = txtDoorNumber.text
[Code]...
What is the primary key value of the row I just added? I have another table with Col(1) as "DoorID" and Col(2) as "KeyID" I need to know what the ID numbers are so I can fill this table next.
I have having problems with the code listed below. I'm trying to re-call the name of a product from a table when I know the productID which is the primary key but i'm getting court up as the primary keys do not match thier row numbers e.g. product with an id of 10 may be on row 2 so when I run my program i get the product name of the product on row 10 not on row 2. The database I'm using is microsoft trial database NorthWind. The rest of the code calculates the number, value and sum of the order.
Dim
i, j, k As
Integer
[Code].....
My app has a main form from which the user can set specific 'setup' information for things such as ports and IP addresses, plus it gives them visibility to a table that is used in conjunction with the TCPListener/responder. The program receives a request for information which it gets from the TCPListener, it gets the requested information and sends back the requested information. It all works great, but I need to move it into the background. When the listener starts, the app is basically locked from any user interface (including the ability to close the form and terminate the process).
What I currently have is:
A class called MyTcpListener with a shared sub 'RequestRespond'
From the main form, there is simply a button labeled "START" for the user. When the user clicks on start I call the listener by:
MyTcpListener.RequestRespond(LocalPort)
restrict users from setting focus to a specific datagridview cell in vb.net
View 8 Repliesi am trying to find a way to add something to one of the columns in my listview. The way my code is setup is like this:
While dr.Read()
If dr.IsDBNull(12) Then
objItem = lstMaster.Items.Add("nothing")
[code].....
I have a button which reads a comma separated value file and loads it into a richtextbox. Each line contains comma separated chars.
Once the file is loaded in the richtextbox, i want to be able to select specific values from each line and store them into an array.
For example:
Line1: a,b,c,d,e
I want to be able to place only the values "b" and "c" into an array.
I was thinking something like creating a menu for the richtextbox which will be triggered on right click, then highlight the values I want, press right click and select 'place these values in an array'.
it doesn't have to be the way i proposed it, but it definitely must use a richtextbox.
I have created a Richtextbox, which produces text based on user-inputted variables as well as some basic formatting - eg: name = txtname.text richtextbox1.text = "Hello my name is " & name & "." What i want to do is set the text in the name variable in Italics when it is displayed, like this.
View 3 RepliesI am trying to sort a column in DGV as follows:
DataGridView8.Sort(DataGridView8.Columns(0), ListSortDirection.Ascending)
However, I want to use the name of the column and extract the index number in the first parameter of the Sort method. However this fails:
DataGridView8.Sort(DataGridView8.Columns("Date").Index, ListSortDirection.Ascending)
Is there any way to find the index number of Child Node.in above shown example is it possible to find Node index of -Node32
View 4 RepliesI have set my listview multiSelect = false, view = details , FullRow select = true , HideSelected = False. I have one coulumn which has 10 items . I want to get the selected row index in vb.net
View 2 RepliesI have a combo box setup with 4 items, with indexes ranging from 0 to 3.
Later in my code, I need to do a certain event depending on what is selected. To do this I thought about comparing what the index of the selected combo box item is, because integer comparison is faster than strings, right?
how I can grab the index of the selected value?