I was looking for quick assistance with disabling the write button based on wrong user input. Program works great just feel like it needs a little more.
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I don't like validating through the TextChanged event either as I believe that to be the cause of some issues. Doesn't the Textchanged event validate on each time a letter is typed?
im trying to disable a button until anything has been entered into two text boxes simultaneously.
So far i have tried:
If String.IsNullOrEmpty(TextBox1.Text & TextBox2.Text) Then
Button1.Enabled = False
Else
Button1.Enabled = True
End If
However it doesnt work simultaneously, the button will become enabled if i enter anything into either textbox, i cant have any of them left blank.
I am currently making a boggle game, I have done finished every aspect of it expect the spell check bit. I have been searching the internet fruitlessly, and have only found spellcheckers but none of the results allow the program to know the word is wrong. So what I want my program to do is after the user has pressed done or the timer runs out, it checks the items in listbox1 and if it is wrong then puts the item in listbox2.
View 6 RepliesWhat i am trying to achieve is that there are 7 columns in my db table. one is primary key and rest 6 are integer columns. Now my application will allow user to input 6 values. I want to compare 6 values entered by user to those 6 integer columns and if in any row 3 or more columns match user's input Primary key of that table is returned..I have tried using queries, cursor, nested loops and i am still unable to achieve my results..
UPDATED :DB Table Structure.. I am inputting 2,3,7,11,45,65. Number of returned rows should be 5. eg..
UID A1 A2 A3 A4 A5 A6
-----------------------
1 2 3 4 5 6 7
2 2 3 4 55 56 57
3 65 11 45 66 67 68
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IDs returned should be 1,3,4,9,10
I have 10 constant arrays of data that can be used throughout the program.[code]I also have an array that needs to be populated randomly depending on user input.array_user(8)If the user selects 3 for instance...I need the data in array_user to be populated by the data in array03.I know I can do that with if/then statements...but I'm sure there is a much simpler way to do it.
View 1 RepliesI have a SQL db that holds the records for my page. On my page I have a details view I want to populate with records from my db. I can populate the records just fine, I need to be able to populate in records based on a user selection from a drop box?To clarify, on my main page I have a drop down list with years (ie. 2011, 2010, 2009), and a drop down containing account codes (ie. six-digit numbers). Based on what the user chooses for the year (for example 2010) and the what they choose for the account code (for example 123456) I want to populate the details view (which is on a seperate page) with only those records from 2010 and with the account code 123456??
View 1 RepliesI am working on a project using Visual Studio .NET 2003.I am trying to open a second form based on user response to Yes/No Message Box. I have tried two different code variations. The first variation is:
Dim MsgAnswer As Boolean
MsgAnswer = True
Dim MsgRes As DialogResult
Dim CustomerInfo1 As New Form
[code]....
With this code I get an exception error: An unhandled exception of type 'System.NullReferenceException' occurred in OrpheyOnOpen.exe Additional information: Object reference not set to an instance of an object.
how to restict the input of a user if im going to accept account e.g.,
View 7 RepliesI have a form with 12 text boxes that a user must fill. I need then by pressing a button to promt for the save directory and save the input as ".".txt file. Moreover i need each line of the txt to correspond to each one of the txtboxes. So the input to the first box will be the first line of the txt file,...the input of the ninth box the ninth line of the txt file.
View 15 RepliesI'm trying to do the following.I want to use a gridview to load a set of associated records dynamically based upon the input of the user.I want the gridview to have a checkbox to the left of the records and allow the user to use this to select records to remove. The gridview will have pages and will be sortable using the columns.I had this working using a delete button, but when I went to using the checkbox it stopped sorting.
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Is there a way to make one list box dependent on the other based on user input. Here's my situation: A teacher has the ability to enter the name of the student into a listbox via a textbox. The teacher may then select the student from the first student list box and input grades that would go into a grade listbox. If the teacher selects another student from the student list box, the grade listbox would either go empty or show the grades inputed for the other student; all the while retaining all previously recorded grades for other students.
View 1 RepliesI've been working on an application for awhile that, basically, allows the viewing and printing of a maintenance database. It allows the user to view basic information for the object and then view the maintenance history. My approach for the maintenance history is simply to have unique tables per object since a history has to be kept for each, however, I'm running into a problem in the application that allows the user to view the general information from one DB and the Maintenance history from the other DB.
Say you have Object ID BG1. I can enter the object ID into a search field, pull the data from the general DB and display the data, but I also need it to pull the information from the maintenance history and display. If maintenance history for this object is not found, then create a new table within the DB, fill the columns with the required fields and allow for the user to edit the history.
I am attempting to set up a datagridview that is dynamic based on user input. The user input is a start and end date. The start date defines the first column the next column is the next date... until the end date (x-axis). The y-axis is technicians and the fields will show the assignment for the technician on that date.
All the advise I am seeing on datagridviews is to create a property methods to provide the information for each column. for example:
Dim 12-Oct-2009 as string
Dim 13-Oct-2009 as string
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How do I create a object data source that allows me to populate the data grid? I want the column headers to be included as a string in row 0 of the multidimensional array. The amount of columns will be dynamic with a minimum of 1 and maximum viewing of 100 days based on what dates are selected in the start date and end date fields.The input dates will be used to generate a query to a database that will populate the multidimensional array.One solution I see is pick a start date and have a set number of dates and code for set number of columns (100) in a row and then set the names of the columns dynamically...ahhhh code repetition!
I am not sure how else to do this but looking for a more suttle way.I am using this to create a simple scheduling tool to see resource schedules by date. There is an unmoveable end date so initially I will need to look ahead 100 days but as the end date gets closer, I will have fewer and fewer dates. So eventually the end date will be that start date.
Private Sub TrackBar1_ValueChanged(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles Trackbar.ValueChanged
txtYears.Text = Trackbar.Value
End Sub
This is the code for the trackbar. At the moment as the user moves the trackbar it inserts the value into the textbox. I want this to work in reverse also. user inputs value into text box, trackbar moves.
I know it is possible as my professors program does this.
How to make a combobox only list based on user's input via autocomplete?For example, if user input "A" the combobox only lists all names start letter "A".If user input "AM" the combobox only lists all names start first two letter as "AM" and so on.
View 6 RepliesI am trying to write a program that allows user input information and plot a bifurcation diagram that looks like this:I haven't program in 2 years:sick: so I am all rusty and such. Here is what I have got so far and more information about what I am doing.
Bifurcation:
f(x) = kx(1-x)
and k = xL + i * (xR-xL) / 500
when i runs from 0 to 500, it plots (i, f(seed)), (i, f(f(seed)), .... up to the boundary number.Here is what I have got so far. Everything seems normal, however, I am really confused when it comes to plotting.
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My project is GUI based. I want to write program in vb.net take some input from user and then i hav to genarate hex file so that it can be run on microcontroller. I just want to know weather hex file generation in vb.net is possible or not?
View 2 RepliesI am trying to obtain a file path that users manually enter on a web page, and then write it to the web.config file.
View 4 RepliesIn this application I need to allow users to enter a month as integer (1-12) then use integer tryparse to validate that input, that seems to be the easy part. I need two create two functions, one that returns the name of the month and the other returns the number of days in that month. The arrays are supposed to be defined and initialized within the function so that the main program can take the user input and call the two functions, then return the appropriate values as output to labels. I am not sure how to declare the arrays in their appropriate functions and then how to call those functions to retrieve the right value from the function.
View 1 RepliesI'm currently in VB class at my highschool and we just got chapter 6.1 to read on this online textbook that we follow. Anyway, we are doing loops now and the problem reads "Write a program to request positive numbers one at a time from the user in an input dialog box. The user should be instructed to enter -1 after all the positive numbers have been supplied. At that time, the program should display the sum of the numbers." So far I know this much
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Now I know this isn't right But I can't find out how I'd pull out the numbers the user entered to get the sum of them and not include -1 because as it stands, when I hit ENTER with -1 the label just shows -1.
I have a procedure at the end of my console application that ask the user to either hit enter to end the program, or type s to perform another search. The issue I'm having is no matter what the user types in the program end. What I would like to happen is if the user types s, then the program starts over and lets the user perform another search. The program is procedural and I need to find a way to start back off at the top of the program which ask the user to type a name to search.
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I want to create a button that calls a preset cmd line like
"CALL binphpphp.exe -S 0.0.0.0:8080 -t bin"
+ what the user inputs as a folder name in the textbox. Or even a batch file + user input folder name in a textbox.
I have most of this working, but there are some issues yet. Basically, it's a "History" form for patients There's a date field for each entry, and if that date doesn't match the date you're accessing the form I want it to disable all controls so you can't edit the form.So it would have to check the current date with the date that is on the form.The issues I'm having are this. It seems to work because when I click today's date nothing gets locked like it used to, but when I do click another date everything in that form gets locked, including the override button and the scrollbar. I don't want the scrollbar locked, and I want to have an override button so the user can edit the form if they truly wish. It also locks the DateTimePicker so I can't pick another date, I don't want that locked either.I tried enabling the DTP in the sub below but it must get ignored
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I have this form with a bunch of input controls. I have code working that will disable them all like I want, but need to work with the if/then statement portion. Basically, it's a "History" form for patients. There's a date field for each entry, and if that date doesn't match the date you're accessing the form I want it to disable all controls so you can't edit the form. So it would have to check the current date with the date that is on the form. Then I also want to have an override button that will ask you if you want to enable all controls anyway, which I can probably figure out. There is some older VB6 code (I think) but I know nothing about VB6 or how it translates.
I think this is the portion that does what I want in VB6:
Private Sub DATE_DblClick(Cancel As Integer)
Call Setdate
Exit Sub
Dim sysDate As Date, Response
sysDate = VBA.Date
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How to have the program check the current date with the date in this form. From there it's probably just a simple if/then statement to fire off either sub. This date control on the form is a DateTimePicker. Maybe I just have to compare that to the system date but I still don't know what to call for that.
I want to create one help file for my whole application. and once user press help button next to any input control then appropriate help topic from file should get display. how can i create this functionality in vb.net?
View 1 RepliesOn the page so far i have 4 text fields and a label and a button the page works up until i put the code in for the submit button then i get this error. BC30451: Name 'labelMessage' is not declared.
The code is Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Line 9: If Page.IsValid Then
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So basically i need to make a loop that only lets the user click it ten times then gives the answer to them.i was gonna use a DO loop that looks like this so far.
Dim counter as integer
counter = 0
Do until counter = 10
loop
and after that i'm kinda lost on what to do, i know that its needs to be if you click btnenter 10 times give the right answer and then your done.
I am doing form validation in VB, I validate the text field data by using txtName_LostFocus function, and on wrong input I used txtName.Focus(). It works well for me. But problem is that as for as, user does not input valid text, my EXIT button also does not works.
View 1 Replieshow to do array of textboxes when a user input a number of textbox to be loaded and when the button clicked, the array of textbox that the user enters will appear?
View 1 RepliesIs it possible to use Console.Write to place a single character at the very bottom right of a typical 80x25 console, without having the console scroll the row up? This is the code that I'm using...
Imports System
Console.SetCursorPosition(Console.WindowWidth-1, Console.WindowHeight-1)
Console.Write("x")
This is not working like I would like it to. Any suggestions or alternatives? I've tested that SetCursorPosition does use a 0,0 coordinate system, already. Using the WindowWidth-1/Height-1 should put me in the lower right corner of the screen... which it does, but then Console.Write is putting the "x" down and continuing on to the next line.