i am probably overthinking this but how can i check the textbox for either a 655 or 699 in the first 3 numbers in the textbox? The current code i how now works but displays an error if (im guessing) it doesnt find the other number in the textbox as well:
[Code]...
I need to do a check on telephone numbers entered into a textbox.I know the regular expression for an email address but not to check a telephone number like such (000)000-0000
View 1 Repliesi have one more issues, and hope is the last for now. How can I limit a textboxe's input to only numerical with certain range of values (eg -10 to 10) and with that happening while I type in the values?
View 9 RepliesI just D/L VB express 8, and I'm trying to learn how to use it. what I'm trying to do is write some code that:takes a number into a text box (textbox1.text)do some simple calculations with that number when I press a button (button1)display the results in a second text box 9textbox2.textThe first problem I am having:The numbers are in the "milli" range, meaning to the power of negative three, so 10^-3 = 0.01 I do not want to enter 10^-3 or any other exponent into the textbox, I am simply entering in 10 because all my units will be in milli. I've tried using exponent and scientific notation but it doesn't calculate correctly. I've done a "work around" to get it to do what I want, but there has to be a simpler way to achieve the above results without. for example, the user enters 10 into the textbox, the button multiplies 10^-3 *30, as a crude example, and stroes that value (say, B=10^-3*30) and B is DIM B as Double.
Problem number two:Error checking. I need to validate that only numbers can be entered into the textbox, or else the program will display an error message (messagebox). I can achieve this to some degree with sample code from here and other places, but, some of the code does not take into account that some numbers have decimal places (I have foud code that does, and it does work), but if a users enters, say the letter "E", it crashes the program. If the user enters "10.3Z", it crashes the program. I cannot seem to code for the last case, a mixture of numbers and letters to get an error message box.
how to write a program that uses a Do while statement and a For ..... Next statement to print the numbers from 1 TO 10 step 3
View 2 RepliesIf I have a datatable with 5000 rows for example can I do a select statement by row numbers. like paging throught it so I don't have to display all 5000 in the datagrid.. i want to go forward and back by 100 rows
vb.net 2008 (vs 2008)
For example:
dgInbox.DataSource = dsInbox.Tables("Inbox").select(between rows 200 and 300)
The application I'm doing requires me to "enter the size of an array in a TEXTBOX, then click a button, a list of random number would show up, then re-arrange from Lowest to Highest".For ex, i enter "5" in the TextBox, then an array or list of 5 random number will show up vertically on the ListBox. I already got this part done. Now the thing is, I have to make a For...Next statement to rearrange them from Lowest to Highest.
View 4 RepliesAm new to programming and i would like your help to this question. [b][color="Red"]Write a declaration statement of an array of integers to store 15 numbers. Initialise the first 5 values.
When I open the Visual Studio 2005 I don't see the template i.e. Win32 Applications, C++
I wrote a program to convert numbers to roman numerals but something in my code is making every number I put in return a ""I" roman numeral. Here's my code.
[Code]....
How to make validations for textbox allow numbers only or textbox allow letters only?
View 14 RepliesI have a textbox, with the following items anim,welcome,30anim,items,20 I am using rhe following code to read each line in the textbox Dim MySplit() As StringDim MyLine() As StringMyLine = Split(tags.Text, vbCrLf)' Split the Contents of the tags TextBox at the Line SeparatorsFor Each mLine As String In MyLineMySplit = mLine.Split(","c)anim_time = MySplit(2)Next The code works fine forward, it sets the variable anim_time to its correct value. What I want to do is to make it check for similar numbers one item backwards. For example: anim,welcome,20anim,items,20 Here the two anim_time as equal. I want to warn the user that this is happening.
View 3 RepliesCODE:
I need to take user input, validate to ensure there's no negative numbers and display monthly fee and check fee in a Label.....with a calculate button_Click
[code] I want to add a new try statement that will check a different folder and if its there, then redirects them... how do I insert an extra if statement without screwing the whole script up?
View 2 RepliesDim number As String = "07747(a)" If number.... Then endif I want to be able to check inside the string to see if it only has number, if it does only contain numbers then run whatever is inside the if statment? What check do i use to check if the string only contains numeric and no alpha ot () etc ..? What i am trying to check for is mobile numbers, so 077 234 211 should be accepted, but other alphas should not be
View 3 RepliesI have a question about working with arrays
I don't have any code written out I just want to know the best way to do this sort of senario to put into a flowchart, the program i'm working on isn't homework, its just practice and the book I have is less than helpful with what i'm working on.
I want to check to see if at least 3 numbers in the array are the same but no less so that it meets a certain requirement how would I check this?
I have a working piece of code that checks that 4 out of 5 random numbers are in sequence. The numbers correspond to 5 dice rolls. I'm trying to learn VB and I think the code can be improved since it's so cumbersome. The sub checks to see if any of the numbers are duplicated and reassigns one of the duplicates to an arbitrary "11" which is outside of the 1-6 range of a single dice roll. Then the values are inserted in an array and sorted and the sequence check takes place. score of 30 is assigned if 4 of 5 of the (sorted) numbers are in order. If not in order, a score of 0 is set.
Code follows:
Private Sub OtherScores4()
'Check if any of the rolls are duplicated and reset one of the die to arbitrary "11".
If Dice1 = Dice2 Then
Dice1 = 11
End If
If Dice1 = Dice3 Then
Dice1 = 11
[Code] .....
Is it possible to check to see if the text in a textbox is present in a table/database and then display the corresponding data.
View 2 RepliesI need to run an If Statement that will check a few conditions.
Basically I want to get it to check a value held in a variable "Temperature" and if the value is within "1" eaither way i.e. +-1 of the value held within the variable to then to output a text string to Label200.Text Else if the condition is not met then out put another text string to Label200.Text.
Example:
Say if Temperature value held in the variable Temperature is 8.5 the if statement checks to see if the DewPoint value is "between" +-1 of the temperature value. i.e. 7.5 to 9.5 as well as the value in Humidity is equal to or greater than 90 and Pressure is Less than or Equal to 1013.25 then the conditon is met, else the conditon is not met.
I have put some code together below in NotePad++ to see if what I am trying to do is the correct way to go about it (note I have not yet tried this code in VB.NET as I don't have it at work).
pass comment on the code and if it is wrong explain what I should do to get it to work.
Dim DewPoint as Single
Dim Temperature as Single
Dim Humidity as Single
[Code]....
Is there a statement to check if a does not equal b? or is it necessary to
vb
if a = b then
'blank
else
[code]....
I have a list of strings in my richtextbox. I need a code to check if there are numbers in the first line, if there is then proceed with the rest of my code, else delete first line.
View 2 Repliesi want a user to entera number and then check if the number entered fall between the minmum number specified and the and maximum number specified inclusive.i have this code but itis not working for me as i want.that is if the entered number is not within the min. and max. inclusive then it should promt the user.
if number>=minnuber and number <=maxinumber then
exit sub
else
messagebod.show("number is out of range.number must be between the minimum and the maximum number")
end if
I need some kind of code to check if the first line in a richtextbox contains numbers or not.
Something like this:
If Richtextbot1.Lines(0) contains Numbers Then
Goto startbot
Else
[Code].....
If the first line contains 4 or more numbers, it will use it. After each loop it will delete line 1. So it repeats for the next line. When my code reaches the 3rd line, and it doesnt find 4 or more numbers it needs to delete the line.
I am a C# programmer but dabbling in VB.Net because everybody else in my team uses it. In the interests of professional development I would like to shrink the following If... Else... statement.
If cmd.Parameters("@whenUpdated").Equals(DBNull.Value) Then
item.WhenUpdated = Nothing
Else
item.WhenUpdated = cmd.Parameters("@whenUpdated").Value
End If
my program is "live" and my customer has troubles because it doesn't functioning as well as it should.I don't know what happen, did I changed something or not but suddenly data won't save to database from newly created forms. Beside this form I have additional 20 forms and everything is working like a charm and I use same code logic to save data to database. I tried to find myself what could be the reason, check by entering data directly to database table (works fine), check insert statement of dataset table (seems fine, too) and everything I could imagine. But now I ran out of ideas and I had to ask here.
Also, I added 3 fields to database table (nvarchar, int and decimal). All 3 of them allow nulls. I changed dataset and data entry form and now data won't insert if I dont enter values to int and decimal fields. Also, this decimal field doesn't accept 0 value if enter but if I assign value 0 from the code than it is ok. I'm not sure if I somehow changed concurrency and somewhere. I tried to find where I can change it but I couldn't find it. I use Visual Studio 2008 and Sql Server 2005 Express. Language vb.net.
How would I go about writing an IF statement that would check for letters? Something like:
IF field IS NOT Int THEN
Response.Write "WRONG!"
ELSE
Response.Write "OK"
END IF
Im currently using this:
[code]...
I have two user inputs (as textboxes) for two numbers I'm looking to check for all the prime numbers with the range of those two numbers and display them within a multiline textbox, however my code returns nothing but zeros, and I have seen easier ways to do it without functions but I am curious as to how to go about calculating primes within the function.[code]...
View 7 RepliesIn my .NET application I have to get results from a MS Access database. I would like to add error checking to make sure a row was returned from my SELECT statement.
View 1 RepliesIs it possible to define my list of strings like in 'good old' VB60, to use only on ebyte of memory for each character? .NET always seems to store any string as unicode, which doubles the required memory. The case is that I have a huge list of strings, all of the same size. It is about 50.000.000 items, 12 characters each. You can imagine I am running out of memory in no time. I tried converting them to arrays-of-bytes but in that case I loose the possibility to perform a "LIKE" statement in a FOR-EACH loop to check for a specific item.
View 6 RepliesI am writing the code as on if statement that if the html class has strings called "<a id=""rowTitle1""(.*?)</a>" then do something. In what property that come after pattern that I could check the string whether if it valid or not??
View 13 Replies