I'm using VB 2010 and I'm trying to populate a combobox with a name followed by a square root, but all that I was able to obtain is a name followed by an image of a triangle with a question mark at the center. I've tried to change the font but without result.
View 1 RepliesFor those of you interestested in mathematics you can find a root of a number in two different ways. Lets say you want to find the 5th root of 27.
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Well, the code I have only gives the the number IF its like 2 x 2 or 4 x 4 is in the text box (4 or 16), but if its a number that can not be multiplied together to get the value in the textbox, it has an arithmetic overflow, what can I do to make it work for all numbers?
Dim Value As Integer
Dim ValueToMultiply As Integer
ValueToMultiply = 1
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Does anyone know how I would find the square root of a variable? I'm drawing a big blank!
View 3 RepliesSo my problem is that i am trying to figue out if a number is prime based on the input The problem is some error keep araising everytime i use it no matter what I include here's the out put:It is obvisouly asking me to choose which square but I just want the regualar square root and I don't know how to insert it,cpp(7) : error C2668: 'sqrt' : ambiguous call to overloaded function
1> c:program filesmicrosoft visual studio 9.0vcincludemath.h(581): could be 'long double sqrt(long double)'
1> c:program filesmicrosoft visual studio 9.0vcincludemath.h(533): or 'float sqrt(float)'
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I am having some trouble with getting my devide and square root operations working. when i hit say 10/2 all i get in my text box is "infinity"
'calculator program v.1.0
'programer: Michael Murray
'version: 1.0
'date: 21 march 2012
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I'm trying to display the square root symbol on a button in a windows form. I'm using the unicode U+221A which on windows character map is the root sign. When i enter this in visual basic ensure the font is the same as that in the character map (wasn't sure if that made a difference to the unicode) my button displays the eta sign instead. Any help greatly received.
This is the code i'm using to set my unicode the the buttons text property.
btnSquareRoot.Text = CChar("U+221A")
I enter a valid picture path run this code and get error in the sqrt line
CODE:
How to fix ?
I am trying to read a text file into a combobox but for some reason it just wont load:
Dim path As String = "C:UsersLukeDocumentsWhispaServerFiles est.txt"
Dim StringArrayOfBuyers() As String = File.ReadAllLines(path)
Dim clientArray(StringArrayOfBuyers.Length - 1)() As String
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So the code is loading the text file fine, it just wont display the first split in the Combobox
In my combobox I have a list of sub folders (so all folders in my Jobs folder), each sub folder has a text file called summary.txt - would it be possible to display fields from the summary.txt in various textboxes if a folder is selected from the combobox? I use the following coding to display folder list in my combobox
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wanted to create a chat loader, and i wanted it to read values from a xml table.
This is the code i have used in Vb.
ChatXml.ReadXmlSchema(My.Application.Info.DirectoryPath & "/../Release/chat.xml")
ChatXml.ReadXml(My.Application.Info.DirectoryPath & "/../Release/chat.xml")
ComboBox1.DataSource = ChatXml.Tables
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Complex DataBinding accepts as a data source either an IList or an IListSource.
enter code here
Not sure, but tried to add data to the Tables in DataSet, but seems i can't get it to work.
I've got myself a CSV file with the following contents:
1,The Compact,1.8GHz,1024MB,160GB,440
2,The Medium,2.4GHz,1024MB,180GB,500
3,The Workhorse,2.4GHz,2048MB,220GB,650
It's a list of computer systems, basically, that the user can purchase.I need to read this file, line-by-line, into an array. Let's call this array csvline().The first line of the text file would stored in csvline(0). Line two would be stored in csvline(1). And so on. (I've started with zero because that's where VB starts its arrays). A drop-down list would then enable the user to select 1, 2 or 3 (or however many lines/systems are stored in the file). Upon selecting a number - say, 1 - csvline(0) would be displayed inside a textbox (textbox1, let's say). If 2 was selected, csvline(1) would be displayed, and so on.
It's not the formatting I need help with, though; that's the easy part. I just need someone to help teach me how to read a CSV file line-by-line, putting each line into a string array - csvlines(count) - then increment count by one so that the next line is read into another slot.So far, I've been able to paste the numbers of each system into an combobox:
Using csvfileparser As New Microsoft.VisualBasic.FileIO.TextFieldParser _
("F:folderprogramnameprogramnameinDebugsystems.csv")
Dim csvalue As String()[code]......
But this only selects individual values. I need to figure out how selecting one of these numbers in the combobox can trigger textbox1 to be appended with just that line (I can handle the formatting, using the string.format stuff). If I try to do this using csvalue = csvtranslator.ReadLine , I get the following error message:
"Error 1 Value of type 'String' cannot be converted to '1-dimensional array of String'."
If I then put it as an array, ie: csvalue() = csvtranslator.ReadLine , I then get a different error message:"Error 1 Number of indices is less than the number of dimensions of the indexed array."
Structure systemstructure
Dim number As Byte
Dim name As String[code]............
I have one combobox, two buttons (Add and View) and listbox. When I click button Add text from combobox is added to text file. This is code for Add button:
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My loging page in root/Account/Login.aspx page when I click on contact us i need to redirect to root/contactus.aspx page. I used Response.Redirect("~/contactus.aspx") in Master page (Site.Master) Protected Sub lbContactUs_Click(sender As Object, e As EventArgs) Handles lbContactUs.Click
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I am trying to find the folder that my file is in so I can use it else where. I am using an openfiledialog. So, if the path of the file is "C: est est.text". I want to be able to get "c: est" without the file
View 2 RepliesI just made my first .net website. I'm trying to use the following line of code to load a file from the current directory ( same diredtory all the web files are in). I get a error saying file does not exist
InstallFormTemp = My.Computer.FileSystem.ReadAllText("installerform.html")
I copied the file to my c drive and chnage the line to
InstallFormTemp = My.Computer.FileSystem.ReadAllText("c:installerform.html")
it worked, but now my site has to run a godaddy's webserver, so I cannot save stuff in the c drive, just my web directory.
How can I get My.Computer.FileSystem.ReadAllText to read files from the websites current directory?
I have a pair of XML files that each have the same root element. I want to merge them into one XML file that has a new root element and which uses the former root element as child nodes.[code]I want to merge these two XML files into one XML file, and do so within a new root element, such as the following example:[code]
View 7 RepliesI need do move the file from one App in root/ProgramFiles to another app in program files. It happens thta in Vista/Win7 I can nod do this... And wehn i try to do this im getting frllowin exception: "Access to the path is denied"
this brings me to the question: How can I write move files to the directoris that are other then MyDocuments? For me this is critical as I need to move custom library to existing app if it is not found there, otherwise my app will not work :
I know, looping through is fast enough. But the search program "Everything" can index my entire C: drive in about 15 seconds. Does it read the MFT or something? Can I do this easily enough with VB.NET? Or at all?
View 5 RepliesI am Using a Application server for calling Oracle Reports and i have url to call the report when report is called the server convert it into pdf but when report contain large data it got a lot of time to load.I want to do in asp.net that when i call the report url it open the pdf file and copies it into the root of my web folder and next time when i call the url it open the pdf file and on back end loads the I want to call function on hyerplink in new tab.i want to use multithreading to call one file from root directory and other to download on backend
View 1 RepliesI have this problem on reading multiple root elements from xml file to vb.net. how can i code it in order for my code to display all the root elements? here is my xml code
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And also how do i do it in a way that I can select the firstname from second root element?
I am attempting to send my XML file through an API. I have done this no problem by using the below code, however when I try and send the FILE over it will not work, I am now getting in the browser:
Data at the root level is invalid. Line 1, position 39.
Without trying to send FILE it works:
' create the Xml that the Msxml2.serverXmlHttp object will send to the Webservice
dim Xml_to_Send
Xml_to_Send = "<?xml version=""1.0"" encoding=""utf-8"" ?>"
Xml_to_Send = Xml_to_Send & "<xmldata>"
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how to close application root folder or sub root folder at the time when application is in running mode?
View 7 RepliesI have a txt file that I need to read into a listview, but I need to read from a specific line in that file. Below is a sample of the txt file to read,
6400,3200,2,95.5,84,76.6,0
1,2,-20,15,0,0,0,"NO",0,0
TOTAL GPM= 6400 HWT= 95.5 CWT= 84.0 IWBT= 76.6 ALTITUDE= 0
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I want users to be able to select from thevalues in the combobox, butI dont wanna allow them toedit or write new item in the combobox i.e I want to make it Read only like what we can do in the textboxI changed its DropDownStyle to DropDownList But when I do that its text becomes blank(the drop down list with appropriate items is present)
View 1 RepliesI have a pretty weird one here, would it be possible to read a column of a text file in to a combobox and to display the directory after the contents of the combobox?[code]...
View 7 RepliesWhat will be the code when I try to make a combo box read only?
View 1 RepliesI have short code like this :
Dim arr1 As New List(Of Integer)
For i As Integer = 1 To 100
arr1.Add(i)
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My problem is : after RemoveAt command is value of array 2 is change this is true, but why it effect to array 1 , i don't want array 1 value change
I have created a program that saves the co-ordinates of the users mouse and saves it to a text file to be used as an auto clicker.
View 2 RepliesI'm using vb.net 1.1 to develop the program. I got text files that contain test result from a machine, like below.
T1 1.24535 2.56335 2.43253 1.24538 2.55619 4.35243
T2 1.42542 1.63728 3.57295 4.59275 1.57320 2.72057
T3 5.12857 2.45375 6.38593 2.58375 3.57259 3.57204
I need to check the test result with the data from database, to find out which test result is failed. If there is a fail test result, I will show an alert to the operator and stop the checking process. Until the operator close the alert, then the checking process will continue from the last read point.