I am creating a program and I need to validate my text boxes. For the program the user needs to put in a phrase. But I am not sure how to make sure that the user actually entered in a phrase, the phrase isn't (ex.) skldkfdl, or that there isn't a space.
View 3 Repliesi am use vb 2003 windows app with access 2003 database i want this code to check for numeric input only in the last text box CompanyProdPriceTxBx.Text
this is my
Private Sub SaveCompanyProdbtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveCompanyProdbtn.Click
Dim rep As Integer
If CompanyProdNameTxBx.Text = "" Then
rep = MsgBox("Please Input Product Name", MsgBoxStyle.Critical)
[code]....
What is the best way to validate a users input? I need to validate a "Name" entered in a textbox, as well as an enetered "Score".
View 8 Repliesi have this code:
If TextBox1.Text = "" Then
Label2.Text = " feild empty "
Elseif TextBox1.Text <> "1234" or "7463" or "3625" or "7642" Then
[Code].....
it works when its only only content "1234" but i need to place more than one possible valid input.
how one would go about validating input into a textbox for example:
Lets say the first letter the user enters has to be 'A' and the third letter the user enters has to be any number ranging from 0-9 and the length of their input cannot exceed lets say 10.
This is what I have so far:
If txtOperatorID.TextLength > 10 Then
bErrorOccured = True
sErrorMessage = sErrorMessage & "-No more than 10 chars" & vbCrLf
[Code]....
The coding for the length works(is there a better way to do this)? The coding for the first letter to be A works but then I have no idea how to set validation for any proceeding characters entered. Am i right in thinking I have to find their position somehow in the string if so how?
I am going to make a form which will have 10 MaskedTextBoxes. I want to validate input of all these MaskedTextBoxes then Sum the input of validated one into another MaskedTextBox. If there is any value in any MaskedTextBox it mast be validate by the format of "9990.000" or if it is empty return zero. I do not want to write the same code for every MaskedTextBox, I want to use function & sub. The problem with "e" type TypeValidationEventArgs. When I call the SumBurBoxes sub in txtBur_1_TypeValidationCompleted & give the "e" as second parameter, then if the txtBur_1 be invalid type and any other txtBur Boxes have value it will get error on all boxes if the txtBur_1 be valid type even the the other boxes be invalid type it does not get error on them.
Here is my Code.
Public Class Entrance
Private Function RetrnTxtBur(ByVal index As Integer)
Dim txt(0 To 9) As MaskedTextBox
txt(0) = Me.txtBur_1
[code]....
Should I validate input parameters on all functions I create? Input isn't passed from a user, but from other routines as part of an automatic process.
I use error handling. I'm not sure what more validating input could do for me. If the input isn't valid, that's pretty much the same thing as an error, isn't it?
Im builtina an windows application based on 3 tiers model. I have BLL, DAL, and UI Class. IN DAL I have SQL code, In BLL I have proprietie and methods .Im trying to validate the input fields on BLL class and no problem,and im just do it after SET instruction. I also PUT a message to view error. But From BLL class I want to put the focus in textfield that return error. I cant acess form proprieties (the forms are on UI class).
View 6 RepliesI am trying to create a new class to validate user input and then call that class from my main form. I am not looking for anything to do the work for me, as this is the last part of my project but I am looking for a place to start. I tried the isNumeric IF statement but I have to create an object to reference the specific text box. Can I be generic and say that aTextBox requires validation and then call that class?
View 2 RepliesI'm trying to validate input boxes for numeric value and range value. If I validate for either numeric value OR range value there is no error (for example, comment out one of the validation statements), but if both statements are present and I enter "a" I get an error "Conversion from string "a" to type 'Double' is not valid." Can anyone tell me what I'm doing wrong?
[Code]...
how to validate 4 textboxes so that only numbers 1 to 4 can be entered but no number can be repeated.i already have code but it only validates some of the boxes and allows numbers to be repeated in other
Public Class frmGrid
Private Grid() As Short
Private Const intDimension As Short = 3
[Code]....
How do I validate textboxes so that they accept only numerical input (1 2 3 etc and not abc @$ etc)? Is there some kind of property of the textbox that I have to change?
View 1 RepliesI'm working on my first VB.NET 2.0 WinForm app. I'm trying to validate some input and I came across this fancy Error Provider control that seems great. However I have a problem with it. It seems that it only validates a field when it loses focus. I'm used to Web Form programming and using validation controls on it, but I don't see these in WinForms.
[Code]...
I am making a windows application that should validate user input before opening up the next form page. I can get the error messages to show, but after correcting the error, they won't disappear and open up the form.
[Code]...
I have several text boxes I need to validate. I am not understanding how to validate in Visual Basic 2008. So I deployed standard If Statements to handle bad data. I am having two problems.
Lets say the user entered wrong data, example, numbers; an error message is displayed. The text boxes cannot contain numbers, be left empty or contained characters, like !@#$. The problem is if the user enter text, and then entered a wrong data again the code does not work or display error message. How can I make the conditions so that they throw out error message even if the user had previously entered good data.
Another example: If the user enter good data in text box 1 and bad data in text box 2, the error message does not work.
Finally, how do I filter out characters to allow only text. Is there a way to use this code on multiple text boxes with out writing the entire code for each form control?
Here are the conditional statements.
Private Sub btnDataSubmit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDataSubmit.Click
If IsNumeric(txtDataEntry.Text) Then
lblErrorDisplay.Text = "Invalid Name!"
lblErrorDisplay.BackColor = Color.Red
[Code] .....
So right now it all looks pretty with ... <button type="submit" runat="server" name="subscribe" id="Button1" class="link-button" onserverclick="saveListing"> Until it is time to validate the data before calling saveListing function codebehind (in VB .Net). How can true/false be return so that when true saveListing will be called, otherwise not?
View 1 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
Ok, so I have created an Access database, and everything is working fine (much to my amazement) except for one thing. I want the database "update" button to validate the input before applying it to the dataset, and if there is an error (empty field) I want it to pop a message and highlight the text box in question where the error occured (there are 7 textboxes).
How precisely do I go about doing that?
CODE:
This is what I have so far for the update button. I attempted the "textbox1.isnullorempty"
If my Category and Forum selection is incorrect I am sorry and feel free to move it. I'd like to have the users input in the message box that will show. For example: There is a textbox and the user puts in their name as Bob. Then the message box would be: What my main goal is, is being able to include the users input they type inside the textbox inside the message box.
View 6 RepliesI'm trying to figure out a way to validate the user data entered:
[Code]...
This is in MVC3, VB.net. I'm looking for an easy way to validate a users input data into the editorfor field.
i want to validate many textboxes with same condition....Do i need to write code for each text boxes.
View 1 RepliesI want to make my staff id text box only accept upper case letters and not lower cases, how do i go about it?I wrote these lines but they stil dont work:
Private Sub txtStudID_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtStudID.KeyPress
txtStudID.Text.ToUpper()
End Sub
I have a form that a user inputs either A B C or D into a text box. I need to validate that one of those four letters has been entered in the text box. I am using a case statement but I think an array might work better but I can't figure out how to validate a string in an array. Or if there is a better way to use the case statement...Here is my code snippet This works, but it seems like it is the long way to do it. Also as soon as I click OK on the message box it immediatly goes and shows my next form. How do I get it validate, let the user redo, and then bring up the other form?
[Code].....
I've been asked to validate the content of a text box to make sure it's only alphanumeric.Now I have 2 question on this from you experts:
1. alphanumeric value needs to start with alpha or it can start with numbers also?
2. I wrote the following code to test my entry but it's somewhere wrong I cannot understand! How can I go through each character to make sure it's alphanumeric?
[Code]...
Might be a simple question but i was just wondering how you can validate a text box to check if it has any symbols in it? I've stopped my program from accepting integers but i don't know how to stop symbols like $, ^ & etc. All i want is letters.
View 4 RepliesI want to validate a textbox.text value to a currency. For example if a user enters $154.45 i want the value to be 154.45 or if the enter USD154.40 I want that to be invalid. how can I do this? basically check that the input is all numbers.
View 10 RepliesI have a form with '7 text boxes' and '1 list box' (for country selection). Basically, i want the user to have to input data into all 7 text boxes but the list box has to contain a country from the drop down box (so the user cant just type random text into the list box)If all this ^ data has been met, then the 'button' is enabled.What would be the easiest way to implement this.
View 2 RepliesI want to validate text taken from a textbox and want it in a specific format. I have tried masked text box but when the textbox is empty it shows something like a blank line in the text box....How can i avoid that and show the masked textbox just like a simple empty (still masked) textbox?Secondly I want data like csc-(somenumber).....Can I add some random number automatically after 'csc-' characters?
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 know you can validate textbox text by using the keypress events. But the form i'm working on has multiple groupboxes with multiple textboxes. So rather than having a sub routine to validate every groupbox, i was wanting to have just the one keypress event that handles the textbox entries, and depending on the textbox calls a specific validation routine.[code]
View 2 Replies