Best Way To Validate A Users Input?
Apr 12, 2010What 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".
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How To Validate Different Textbox Input
Apr 1, 2011i 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.
Validate Input In A Textbox?
May 4, 2012how 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?
Validate Input Of 10 Same MaskedTextBox?
Jul 3, 2011I 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]....
Validate Input Parameters In VB?
Apr 4, 2010Should 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?
Validate Text Box Input?
May 5, 2009I 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 RepliesValidate The Input Fields On BLL Class?
Aug 2, 2010Im 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 RepliesValidate User Input In A New Class?
Apr 15, 2012I 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 RepliesValidate Input Boxes For Numeric Value And Range Value
Jan 14, 2012I'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]...
Validate Input Only Allow Each Number To Be Entered In Once (no Repetition)
Feb 25, 2009how 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]....
Validate Numeric Input With Text Boxes?
Apr 29, 2010i 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]....
Validate Textboxes So That They Accept Only Numerical Input (1 2 3 Etc And Not Abc @$ Etc)?
Mar 26, 2011How 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 RepliesValidate Input - Fancy Error Provider Control
Jun 19, 2009I'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]...
Validate User Input Before Opening Up The Next Form Page
Oct 23, 2010I 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]...
Validate User Input - Loop Conditional Statements To Indicate Errors?
Mar 20, 2011I 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] .....
For Next Iteration To Sum Users Input Numbers?
Feb 9, 2010For Next Iteration To Sum Users Input Numbers
View 2 RepliesFirst Use Javascript To Validate Form Data Before Triggering OnServerClick For HTML Input Button?
Oct 19, 2010So 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 RepliesVb 08 Express Case Statement - Take User Input, Validate To Ensure There's No Negative Numbers
Apr 9, 2011CODE:
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
Changing Labels As Users Input Integers
Feb 26, 2011I'm making a project that judges contestants. I have 3 labels at the bottom of my form that will keep a running total of the top 3 contestants, and change as the contestants score higher or lower. I'm not sure if I should use a loop or if statement, or where to begin at all.[code]
View 2 RepliesResizing Of Forms According To Users Input During Runtime?
Jan 9, 2009I am creating a form in vb.net and i want its size to change the form as soon as the user inputs the desired number of items. In my form I have two combo boxes: one for number of items and the second is for the choices, then when the user choose 5 items 5 text boxes will appear and if the choice is 25 then 25 text boxes will appear. Is there any way that I can change the form based on the input and number of text boxes?
View 1 RepliesStop Users Input Any Words Into Combolist?
Sep 26, 2010I want to stop users input any words into combolist,they just can select item from combolist,instead of input something,anything,but how?
View 7 RepliesUse To Make The 1st Letter Of The Input Users Name Is Capitalised?
May 30, 2011wondering what i should use to make the 1st letter of the input users name is Capitalised.
so textbox 1 they would enter - josh and when its shown in any labels is shows - Josh
would ucase be used here ? im not sure.
Validate The Given Password Is Same As The Current Users PAssword?
Mar 21, 2011I have developed a task Using VB.net (windows Application). I want to create a Login window for the Current user only allowed to use my application.So In my Login window UserNAme textbox I have showed the curent Login UserNAme like,
txtUserName.Text=Environment.UserDomainName & "" & Environment.UserName
And I have set txtUserName.Readonly =True.
Now the User to type the Password in my application password textbox.
[code]......
Display Whether The Users Input (SideA, SideB, SideC) Of A Shape Is A Triangle Or Not?
Mar 17, 2010My goal is to display wether the users input (SideA, SideB, SideC) of a shape is a triangle or not. I am unsure of my issue however it seems that the function i am using returns false even if the shape IS a triangle.The code i am having issues with is this;
Code:
Private Function IsTriangle(ByVal SideA As Double, ByVal SideB As Double, ByVal SideC As Double) As Boolean
If (SideA + SideB > SideC & SideA + SideC > SideB & SideB + SideC > SideA) Then
[code].....
On button click i call the function and the inputted values i am using are all sides = 100.
Document Containing Many Activex Textboxes Which Are Used To Apply A Character Limit To The Users Input?
Aug 19, 2009I have a word (2003) document containing many Activex textboxes which are used to apply a character limit to the users input. Sometimes users want to paste data into the textbox from another source ks fine, but if they try to do it via the Edit menu then the textbox is deleted and replaced with the pasted text
View 6 RepliesDatabase "update" Button To Validate The Input Before Applying It To The Dataset ?
Jan 22, 2009Ok, 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"
Validate Html.editorfor - Validate The User Data Entered
Apr 26, 2012I'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.
Administer Website (create New Users, Assign Users To Roles) From A Windows App?
Feb 9, 2010I have an asp.net web app that uses forms-based authentication, a SqlMembershipProvider (using an encrypted password format), and a SqlRoleProvider. I need to know if it's possible to administer the users (create new users, assign them to roles, etc.) from a windows application - the powers that be don't want any administrative functionality in the web app itself.Here is the membership provider definition from web.config:
<membership defaultProvider="MyProvider">
<providers>
<add name="MyProvider"
[code].....
VS 2008 Database Search - Using SQLClient That Loops Though All Users In A Users Table
Dec 29, 2010I've got a code using SQLClient that loops though all users in a Users table inside each loop i want to preform another search in the UserOrders table, thus doing a count of all orders.
I get this error
HTML
There is already an open DataReader associated with this Command which must be closed first.
Here is my code
vb.net UserLists.Items.Clear()
Dim connection As New SqlClient.SqlConnection(My.Settings.ConnectString)
Dim command As New SqlClient.SqlCommand("SELECT * FROM Users ORDER BY PersonName",
[CODE]...
.net Desktop App : Log Users Application's Usage By Users After Remote Deployment?
Apr 3, 20121.I�d like to publish a free vb.net desktop application for the users to download and use meanwhile I�d like to collect usage information ex: user ip address, user�s registration information, used features, time spent� if the user allows the report to be sent back.
2.Also , in order for the user to be able to use the application, he�ll have to register it then, everytime, before the application loads, it gets verified online that it was registered, maybe validate the registration information or a valid user name and password, no critical personal information. The target of this step is for the application to be used exclusively by the registered user and maybe on his computer only.