Checking Text Within Textbox
Mar 9, 2010
I have a search textbox.I need the code-behind to check the value of the textbox and act upon it accordingly. I need to differentiate between the different search criteria.[code]I have the number searches working properly (street number, parcel number and routing number). If I search for a street address, it sees the whole string as a string instead or it containing a number as well.I need it to differentiate it between a street address and the owner last name/street name.[code]
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Dec 27, 2011
I'm using a Rich Textbox in my vb.net application on update form to take address value. My update query is generated at run time looping through the textboxes on the form and checking which fields have got some value and the corresponding fields are updated in the database. For Each x As Control In Me.Controls
[Code]...
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Apr 11, 2010
I want to make a password cache, and i want it to make sure it contains both Alphbetical and Numerical characters
I also want it to be atleast 6 characters long
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Jul 5, 2009
How would I go about checking if a control (in this case a textbox) is selected? I have searched Google as well as gone through all of the possible functions and still found nothing. I know it's relatively easy as I've seen it done before but I can't remember how.
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Feb 8, 2012
i am trying to validate an email address by making sure that there is an @ symbol present in the text box. So far i have the following code.[code]I get a blue line under the "@". How do i get this to work? Or is there a better way to do this?
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May 17, 2011
I have a test Listview with four rows. In the code below when I start at the top and check each row the textbox is populated with the selected value. When I randomly check a row the correct value (checked row) does not consistently populate.
Private Sub lvwInjuredWorker_ItemCheck(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ItemCheckEventArgs) Handles lvwInjuredWorker.ItemCheck
If lvwInjuredWorker.Items.Count > 0 Then
For Each lvitem As ListViewItem In Me.lvwInjuredWorker.Items
[Code] .....
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Jan 31, 2007
I have three text boxes in a winform (.net 1.1).
I am expecting the user to type in a positive number or just to leave it as zero (default).
Is there a way that I can check that the user has typed in a number rathet than letters.
As I am coding it in VB.NET, I would prefer it if any answers where in VB style rather than C# or C++.
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Sep 8, 2009
best way to check if a textbox has only 4 numbers and isNumeric, for example i need to enter postcodes.I currently have:
If CDbl(txtPostcode.Text) <> 4 Or Not IsNumeric(txtPostcode) Then
MessageBox.Show("Postcode must be 4 Digits", "Error")
But the message box comes up regardless of whether there is 4 numbers, letters, or anything in the textbox. Its also used in the leave function of the textbox.
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Mar 19, 2009
How I can check when someone uses the standard paste function via rightmouseclick? I want to check something before the text can be pasted.
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Mar 8, 2009
I have been trying to check if a user has input a specific time format into a textbox.For example
1- User enters time in hhmm format
2- Checks the input
3- If wrong, MessageBox.Show("Need hh:mm time format")
I have only used IF statement with IsNumeric to check for number input but was unsuccessful with various attempts I can think of for checking a time format as I need Option Strict On and have the following error: Option Strict On disallows implicit conversions from 'String' to 'Date'.Is there a way to like check if the hh:mm has the ":" separator too?
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Aug 31, 2009
I have below code in vb.net.
[Code]...
I want to check at client end whether the entered date in text box is future date. I mean this textbox should allow future date only. code the above problem using jquery or vb.net
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Dec 7, 2010
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?
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Feb 27, 2009
I am trying to figure out if I have a textbox and user entered and another user wrote How can I have an IF statement to check if there's a bk= SOMEWHERE in the text and if there is then DO something.It has to search for bk= because everybody wont enter hello my name is bk= john, it will be diferent combinations like
[Code]...
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Aug 20, 2011
with this all previously defined earlier, book is another class with a public sub new and all is working perfectly well.However. Within the book class I've a bit of code which sets the author "invalid" if it is wrong (i.e. the name has numbers).How would I then check within myBook for an instance of invalid?i.e. assuming a string that can only be invalid or not if myBook= "invalid" then correctstuff=false
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Mar 23, 2010
I have this code to check if an item from a textbox is in a listbox and its giving me the error at the bottom.I copied it from another part of my project and it was working for that part so I cant see whats wrong.
If LocationsSearchTextBox.Text <> "" And LocationListBox.Items.Count > 0 Then
tempInt = 0
While (tempInt < ClientListBox.Items.Count)[code]......
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Jan 22, 2009
How I could go about checking a typed value in a combo to the values in the combo box. I am making a system to select lockerID and Supplier ID I want the user to be able to enter the value in the combo box as well as select the value form the list in the combo box. Here is the code I have been trying.
If cboStockID.Text = "" And cboStockID.Text <> cboStockID.Items.ToString Then
MsgBox("Please enter Stock ID")
Exit Sub
ElseIf cboSupplierID.Text = "" Then
MsgBox("Please Enter Supplier ID")
Exit Sub
End If
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Apr 28, 2009
Well, its not text, but a number. I've currently got about 10 labels and right now I'm checking each one of them separately using if statements, but I've been told that there is an easier way using a For statement (I've never really got used to it...) to check all of them without having so many if statements... Currently I'm trying something like this (which, ofcourse, doesn't work and is completely wrong :X)
Dim i(10) As Integer
i(1) = label1.Text
i(2) = label2.Text
[code]....
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Sep 20, 2010
I have 22 text boxes that have to be checked to see if the value has changed. I am using the TextChanged Event handler to do this thus:
Private Sub TextStringChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
DataChanged = True
RemoveHandler ........
[code]....
The Handler would be added after the data had been loaded. The question is:Is there another way of checking for text changes without having to add and remove 22 handlers.
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Nov 1, 2009
I'm doing drag and drop from a list view. In my starting list view's ItemDrag event handler, I say (amomgst other things):
data.SetFileDropList(coll)
data.SetText(CurrentFolder, TextDataFormat.Text)
sender.DoDragDrop(data, DragDropEffects.Copy Or DragDropEffects.Move)
CurrentFolder being a string that holds the name of the folder represented by the list view. In the target control's DragDrop event handler, CType(e.Data, DataObject).GetText evaluates to what CurrentFolder was when ItemDrag was executed.But: e.Data.GetDataPresent(TextDataFormat.Text) always evaluates to FALSE.If I replace "TextDataFormat.Text" by "DataFormats.Text" (in both places) the result is the same. I am asking this although my code does what I want, because I feel that I should not call CType(e.Data, DataObject).GetText before I have established that TextData is actually present. So how do I properly check for the presence of the text data.
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Jun 27, 2010
I am adding the text of a label into a datagridview. But before i do the insert, i want to check if the text does not already exist in the datagridview.
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Aug 5, 2011
How will I check that the dynamic textboxes is empty;
Here's the code:
Imports System.Data
Imports System.Data.SqlClient
Public Class FunctionProcessor
Dim objcmd As New SqlCommand
[code]....
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Sep 18, 2009
I need your help. I cannot get the messagebox to show up on my screen when the program checks the text fields on the webpage that says "this is the test".[code]...
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Dec 4, 2009
Can I set this function so that if the local settings.txt exists, it will NOT be overwritten unless the mapped file is newer?
If IO.File.Exists("C: empsettings.txt") = False Then
IO.File.Copy("K: empsettings.txt", "C: empsettings.txt")
ElseIf IO.File.Exists("C: empsettings.txt") = True Then
[Code]...
Currently modifying a program that is being used by several staff. Each time they restart it, it starts the latest build.
I have a settings.txt file that is needed for the latest build(not on all pc's yet, original version has the settings written in the code) and updated as needed.
If local PC doesn't have settings.txt, it is copied, if it does have settings.txt it gets overwritten by the mapped copy on each run.
Wanting to let users keep their 'personalized' local settings.txt, unless I add a new feature to the program that requires a change to the mapped settings.txt file.
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Sep 19, 2010
I'm writing a program for my class, which pretty much is an energy cost calculator. It takes 4 inputs from 4 text boxes and multiplies them, and the result is the cost. Well, now I have to come up with a way to check for empty text boxes and display a prompt to enter a number. I've tried inserting multiple codes to display a prompt and to no avail nothing has worked, I also receive the error "when casting from a number, the value must be a number less than infinity" error.
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Aug 4, 2010
Is there any better performance by checking for a true value like this:
[CODE]..............
Than like this:
[CODE]..............
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Aug 6, 2009
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?
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Aug 8, 2011
For example, I clicked the Add Text box button, so it added 3 text boxes in the form (I used Dynamic text box so it can add multiple text box). When I input data to one of those 3 text boxes and then Save button has been clicked. It should checked whether the dynamic text boxes are empty or not. If there are empty text boxes, then saving data to db should not be continued and display a message telling the user that empty field(s) are invalid.
In the code below, it saves the data even if there are empty text boxes and I think because it is in the for loop, it checks the text boxes one by one and repeatedly displays the message box that I coded.
Here's the complete code:
Imports System.Data
Imports System.Data.SqlClient
Public Class Form3
[Code]....
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May 14, 2012
I have a textbox which has a numeric value that changes - would it be possible to check if that value matches two numeric values in a text file? and if the value matches then to display some text in a label? The textfile only has fields displayed like so
Horizontal 55
Vertical 16
So I would only need to check if the numeric field in textbox matches the two numbers in the second column. In the past I have use System.IO.File to create/delete/append to files but I havent come across anything like contains.
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Aug 24, 2011
i need to search through the host file on pc to check whether entries contained within another text file are in the file.
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Feb 21, 2011
I'm fairly new to ASP.NET & VB.I've been asked to take an existing textbox that is automatically filled with the current date and allow the user to either add a "+" or "-" and a number or a spcific number and convert that into a date.I underdstand the basic concept on how to do this, but I'm running into some problems using the proper commands in order for this to work.The Textbox is called txtDate.What I've tried to do is this:
If txtDate = '+' Or '-' Then
DateAdd("d", txtDate, today)
End If
Here is what the whole thing looks like:
Protected
Sub
DateEnter_Click(ByVal
sender As[code].....
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