I am trying to do an if/then to check a textbox for text. I have a form that has name, address, etc. I need to make sure the form has a name in the txtName before it continues on.basically
If txtName has text Then
'continue about your business.
Else
err.message ("you need text.")
end if
I'm making a program and i want to make it so it checks if the textbox as any text entered at all [code]...
View 3 RepliesI am trying to do an if/then to check a textbox for text. I have a form that has name, address, etc. I need to make sure the form has a name in the txtName before it continues on.
basically
If txtName has text Then
'continue about your business.
Else
err.message ("you need text.")
end if
Is there a way to check if the user has changed the value of a textbox?I try to acces a variable in one of my methods to compare against the value but I can not seem to be able to access it?
View 1 RepliesIf in textbox the default textbox value id 1,2,3,4,5,6 ...... upto 55then the following checkboxes would be checked according to the text display in text box...if textbox1.text =1,2,3 then in my webform checkbox1, checkbox2, checkbox3 would be checked ... on page load event...
View 2 RepliesI'm struggling with my computing coursework in college and I though My issue is simple but I can't get it right. I need to validate the text into a textbox and check that it contains ONLY alphanumeric characters, but it MUST contain both, not either numeric or alphabetic, but some of each.The textbox should store information about a Street address, that's why both the street Name and the property Number have to be input. Spaces " " and points "." should also be allowed.If it helps, something like "12" or "St. Davis Street" should NOT pass the validation checks, whereas "St. Davis Street 12" will do.I would like to get it done with regular expression as I've been using them throughout my work, but I don't mind other solutions.I'm using Visual Studio 2010 Professional, 4.0 framework and Visual Basic.
View 2 RepliesI am trying to figure out how to read a text file and check the value entered into a textbox to see if it already exists. Its basically a validation list.
I found some code on how to read a text file, but I do not know what to do with the information.
Sub Main()
If RadioButton1.Focus = True Then
'Check TextBox1 value against list of known part numbers
[Code]...
How do I compare the textbox value to a line read from the file and stop if there is a match?
I will try the way of the following code:
'Click on Button1 spell checks Text1 textbox
Dim strResultText As String
Dim sc As New SpellChecker
[Code]....
I can identify the error.But I don't know.
How Can I have Check items in a Listbox for a text that is = to Label/Textbox
I want to control a Counter I have
Label.Text = Val(Label.Text) + 1
To add the Count
I am new to Win Forms, I have a scenario here..When User enter ID in a textbox, I want to check that value in database and get the name for that ID before submitting the Submit Button.
View 1 RepliesIm trying to use this code to check if files in a directory equal to the text typed in these textboxes. The files end with extension ".ldb". The code doesnt seem to work
View 11 RepliesMy form has a texbox where user enters an ID. IDmust be4 chracters in length andof the form: begins with either "E" or "e" and the next 3 chracters cannot be "all characters".
Example:
E102 - corect
e3ff - correct
[code].....
My application is like this : i have to search my data from database with some check box and text box when user select check box specific function go on and then when user enters some range of value in textbox then the result will shown in data grid view after that i can print it by selecting data
my vb.net code is as follow:
Imports System.Data
Imports System.Data.SqlClient
Public Class XtraForm1
[CODE]............
I m also pasting the demo picture.
LblPPG.Text = Val(TextBoxPP.Text) / (TextBoxQTY.Text)
This is the only way I know how to obtain the info I need for this equation but if generated again with no input from the textboxes I get an error. Is there anyway to bypass this if its generated a second time with no inputs?
is it possible in design mode to set the textbox text property to the text property of a textbox in a different form in vb.net?
View 1 RepliesI am making a security app. It searches for personal data as email-addresses and IPs, but the code to search for a ip-address is not working right! My scanner should manage to read the ip out of ex:
"ufyukovgjhsui192.168.0.100tyugfk
uyfkj192.163.7ytigfkidf,tygfnhmyu6"
I made this code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim i As Integer = 0
Do Until i = TextBox1.Text.Count
[code]....
I have several textboxes trough which i add data in the database. after clicking the save button the data is added to teh database. and if i click again on the ssave button without changing the content of the texbox it adds the same data to the database. i have tryied using textbox.modified but it only works for blank textboxes. how could i prevent from adding the same data?
View 6 Replies[if me.textbox1.text= system.dbnull then msgbox("please inter a value")] it says system.dbnull can't be used as an expression so how can i check the if the textbox has a null value
View 13 RepliesIve got a Form application in VB.NET.I have many text boxes on one form (about 20). Is there anyway to check them all at once to see if they are empty instead of writing out a massive line of code to check each one individually such as
If txt1.text = "" Or txt2.text="" Then
msgbox("Please fill in all boxes")
How to only check that checkbox which is entered in textbox ? If i have 4 checkboxes eith text checkbox1, checkbox2, checkbox3 and checkbox4 and 1 textbox if i type in textbox 1,2 then only checkbox1 and checkbox2 would be checked again directly after doing that i type 3,4 in textbox then only 3,4 will be checked and 1,2 will be uncheked.. remember i wanna do this coding for unlimited no. of checkboxes .. so dnt provide coding for 4 checkboxes only.
View 2 RepliesI have multiple textbox in a form. How do I know what textbox the cursor currently is? Trying to do something like this:
If TextBox2.Focus() = True Then
MessageBox.Show("its in two")
ElseIf TextBox3.Focus = True Then
MessageBox.Show("its in three")
End If
But I think its not working.
I'm trying to check for the number of decimals in a textbox, but I'm not very successful so far:[code]How can I correct my code to make it work? Or any other/better solutions?
View 2 RepliesI want to check if the value in the text box is EVEN NUMBER.else throw an error mssg.
View 3 RepliesHow can i check the exact word in a sentence.even though it is a alphanumeric.
Example: I have a user define value of "hello! how can i help you?"Then it will automatically check if the user's input type the exact text.if not it will produce a said number of error.
Example:The user input a value is a "Hello. how can i help you." it will produce and error base on the input text of a user.
Error:3 the error is "H,<.>,<.>"
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 have two text boxes (txt1, txt2) and an exit button (btnExit)In txt1.Leave event; i have some validations. If validation fails then I keep the fous on txt1.If btnExit is clicked then I do not want to execute the validation and instead close the application.. How do I do it?
View 4 RepliesI am using VB.net to create a simple winform. I have the option to save the data I input on that form. I am trying to prevent the user not to save the data if textbox10 is empty. I tried the while loop but I go into an infinite loop. The code is below. The if statement gives the error but allows the user to save.
[Code]...
Im trying to get my code to check that my textbox has 16 digits in it so that it can then validate the number entered. Here is the doe i have so far: [code]
View 3 RepliesI've got a program and what I need is for a Timer (running in a different thread) to constantly be checking a TextBox for an entry that is similar to:Quote"(PlayerName)" has joined the server.Where (PlayerName) would be replaced with the players name in the TextBox. What I would need the TextBox to do after it has found this entry is to add (PlayerName) to a listbox. If someone can help me out this far then I can use the same code to get it to remove the player when they leave.Below is a picture of what it should look like inside the program.
View 3 RepliesHow to check if the string in textbox has space/spaces then I will put it in if condition.
View 9 Replies