VS 2010 : Error Message For Empty Listbox?
Jul 4, 2011
i have 3 listboxes and a calculate button and a lblGrandTotalCost, the program works like this when i select an item from listbox 1 and listbox 2 then click "calculate" it shows a result in listbox 3, after repeating this rocess few times if u click the lblGrandtotalCost button it calculates the grand total of all the totals that are in listbox 3, Now i want the program to show an error message if some one click the lblcalculateGrandTotal button when listbox 3 has nothing in it or empty. how do i do that?
i wrote this code but it don't seem to work
If lstGrandTotalCost.Items = "" Then
MessageBox.Show("warning! theres nothing in listbox 3", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning)
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Dec 22, 2010
I have a functioning program that has been completed that based on miles and gallons used, both will display the individual MPG for each single entry as well as compile a total for the miles, gallons used and overall MPG at the bottom.My problem is that when 0 is entered for fuel, the MPG calculation says Infinity and 0 is placed in the gallonsUsedListBox.I've been trying to get the statement "Gallons must be greater than zero" into thegallonsUsedTextBox by utilizing an If..Then statement but to no avail. I'm not sure where to input it or if my avenue of using the If..Then statement is even on track. Here is the code I have:
Option Strict On
' MPG Average
Public Class MPGAverage
[code].....
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Sep 22, 2011
I have a couple of modal popups on my page that hold checkboxes. The checkboxes are different items that can be added to a specific product. Some products, however, have all of one type of item assigned to them. I need a way to show a message in the modal when the modal is empty.
I have tried using a Label inside the modal that says "All features are currently associated with this product." But the label leaves a space in the modal when it's visibility is set to hidden and that was annoying so I ditched that idea.
What is a good way to have a hidden message that shows up when the modal is empty?
<asp:LinkButton ID="FeatureButton" runat="server">Feature</asp:LinkButton>
<asp:Panel ID="FeaturePanel" runat="server" CssClass="modalPopup"
Style="display:none">
[Code].....
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Jun 21, 2010
i have a form with 4 text boxes on them when the user selects add the information from the textboxes saves to my database im just wondering does anyone know how i would make an error message appear if one of the textboxes was blank and stop the new data being saved until all textboxes have data in them?i did write the following peice of code but it did not work Private Sub Button1_Click(ByVal sender As System.Object, ByVal e_
[Code]...
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Feb 22, 2011
I am working on a small program to find all images on drive and display them using Cygwin commands. I found a code snippet that seems to work well but get a error when I run it. Here is code:
Try
Dim r As IO.StreamReader
r = New IO.StreamReader(workingdir + "\images.txt")
[code].....
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Aug 1, 2011
I have a ListBox with proxy and a webbrowser, the webbrowser has a timer for navigate to some urls. I want stop the timer when the listbox(proxy) is empty.Example:1-I got 10 proxy in a listbox and 20 Urls in other listbox: I want to stop the webbrowser when the last proxy was used.
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Oct 14, 2009
I cannot find how to display an error message when what I typed in the listbox field is not in the listbox collection.
For example the listbox contains the following items
1) Apple
2) Strawberry
3) Mango
If for example I type "Mongo" and then press tab to another field, a message will pop up saying I typed something not in the listbox. Anyone who knows how to code if text in textbox1 is not in listbox then blah blah blah.
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Mar 31, 2009
an error message when I am trying to load the data into a listbox and the value in the table is NULL. I am new in programming and I am using vb2005 Here is my
[Code]...
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Jan 5, 2010
I am facing another error "An error occurred trying to load the page. Member not found. (Exception from HRESULT: 0x80020003 (DISP_E_MEMBERNOTFOUND) )" performing the following scenario:- Opened a sample VS 2010 WPF project that I receiveved from a co-worker (Project compiles, and run on his machine)I tried to open project properties (Project --> Properties)The project properties panel/window didn't open, all it had was an error symbol (red/white X) and the error message above(HRESULT: 0x80020003).I am unable to view niether the designer window nor the code window (no messages are reported) but the pane where the code/design shoud display is empty, all you can see is the background color.
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Jan 5, 2011
Im having an issue creating an error message for validation on a field. I have created the validation in Access and used ADO.net to connect to my VB form, but would like an error message to pop up when something is input incorrectly!
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Jun 15, 2011
I have a form and I have added some data in the comboBox's and a textBox, I clicked BookingTableBindingNavigatorSaveItem all the data was saved.
But when I click the BindingNavigatorAddNewItem to add a new record I get an error message. can someone tell me what is wrong (picture below).
[Code]...
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Apr 19, 2011
I have a program that is using API's to send mouse events and keyboard events to another application that is running. I need to know how to tell if there are any messages left to process for that window after I have click on a button or moved to the next field. I need to know this so I don't send any more mouse or keyboard events until it has finishing processing everything in its message queue. An example is that I click out of the key field and the form has to go out and read a client record. This may take a second or two, so I need to wait until the form is ready for more input.
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Sep 22, 2011
In the Catch of Try-Catch there are the following two properties:
e.Exception.Message.Count()
e.Exception.Message
Does the .Count mean there are multiple lines in .Message? If not, what is the .Count used for?
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Dec 28, 2010
When I attempt to open the visual basic window in PowerPoint 2010 I get the following message:STDOLE2.TBL could not be registered. What causes this and how is this fixed?
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Apr 25, 2011
when in debug mode, the form loads I then fill out the form and when I click the save button I get an error message,
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Dec 2, 2010
I am working on a program where a user either enters "small" or "large" and then the number of toppings. Once the user has done that my program outputs the total cost of a pizza based on user input. If they enter something else besides a number in the txtNumberOfToppings I am trying to show they message box that says "Re-Enter a valid number!" Likewise I am trying to display the error message "Re-enter a number that is 0 or greater!" If they enter a negative number into the textbox. However they do not display when I do enter invalid input.
My Code
Author: Adam Fandre
Description: User enters the words "SMALL" or "LARGE" and then the number of toppings
And program then displays cost based on user input.
Comments: Finished
Option Explicit On
Option Strict On
[Code] .....
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May 18, 2012
I have this function I put together with help online and it works just fine until the program runs over night. I don't think it is night time that is the problem, just the long run time. I take bitmaps and place text on them then convert them to icons so that the image can be used on the system tray.
[Code]...
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Apr 2, 2012
I've got a grid view. I want it to say "you have nothing to show" if there are no details.
Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
If GridView1.Rows.Count = 0 Then
[Code].....
However; it seems to be working backwards and showing the message when there is data to display in the gird view and continues to be a blank page when there is not data to display in the grid view.
I've tried a variety of combinations with the below IF statement below but no success.
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Jan 30, 2009
Adding a records with ms access.if my form load is empty in my textbox and press ok button will show a message box "Records Failled".I'll try to run it and i got an error "Data type mismatch in criteria expression." [code]
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May 20, 2010
I have the following code and I want to say that if the datagridview - dgvImportData is empty then say this message otherwise say the other message.
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Feb 3, 2012
I have written the below code for a payroll calculator. When I run the program, it gives me my own error message box no matter if my number of hours fall within the 5-60 hours range as I have stipulated. Is there something wrong with my code? (well, obviously there is something wrong--I just cant find it!)
CODE:
'This program calculates the Gross and Net Pay as well as the Tax Deduction amount of an employee's wages when given the input of Employee Name, Tax Rate, Hours Worked, and Hourly Pay Rate.
CODE:
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Jul 4, 2011
so one of my error message in my program looks like this MessageBox.Show("You forgot to select a Location!" & ControlChars.CrLf & "You must select a workshop and location then click Add workshop button," & ControlChars.CrLf & "repeat the process few times and" & ControlChars.CrLf & "then click Calculate button to calculate the grand total", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning)and i want the texts "Add workshop" and "Calculate" bold or highlighted when the message box appears, how do i do that?
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Jun 23, 2011
Working with an If statement I have tried the following
If -0.6 > (LLum_Gline(8).X - LLum_Gline(12).X) > 0.6 Then
patient_frm.llum_gline = 2
MsgBox("Measurement is Abnormal")
End If
I am getting an error message that says Argument out of range exception unhandled. I have double checked and verified that LLum_Gline(8).X and LLum_Gline(12).X are in fact valid.Is my problem simply in how i am phrasing the If statement. Is there a way for me to phrase what im doing without writing multiple if statements?
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Jan 31, 2009
i post a new thread with same in my previous topic Using If Statement. If my textbox is empty or no value then clicking a button will show a message box..and if trying to put a value will do event.inserting a record. all i need to know how can i make it that thing.if i try to load without any if statement and trying load it btnok will load a insert record. Just like a LogIn form that will pressing a ok button with no value will display a message box Invalid Username
[Code]...
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Apr 4, 2011
I have the following form and I'm trying to add a error to the page that if the recordset = 0 then there is a message on the web page stating that there were no results. What's the best way to do that?
Imports System.Data.SqlClient
Imports System.Data
Partial Class _Default
[code].....
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May 16, 2012
I created a simple program which basically launches programs installed on 32-bit system in the C:Program Files directory. I purposely put an .exe line of code in the compiler but that .exe wasn't installed on the system, I was expecting for an error when I tried to click the launch button and I did. NOTE: I already have a beginning If statement and that program is actually installed in the system, works perfectly no errors appearing.
ElseIf lstMultimedia.SelectedItem = "HyperCam" Then Process.Start("C:Program FilesHyperCam 2HyCam2.exe") 'this program doesn't exist in the system"
When the error appeared I looked at it in detail and found it was a system.componentmodel.win32exception type of error, I'm guessing that means a file doesn't exist in the directory I specified therefore the program displays an error.Now what I want to do is display a message box saying along the lines "This program cannot be found in your system" or something like that. But I don't know what the actual syntax/code for it, so far from thinking I have this.
Else : lstMultimedia.SelectedItem = 'no idea what to put here Then MessageBox.Show("This application cannot be found in your system or is installed in a different directory", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
End If
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Mar 9, 2012
Is there anyway to catch or display the request failed with an empty response message somewhere other then in a message box, for a example in a text box? Catch request failed with an empty response message
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Dec 27, 2011
I'm having an issue with the startup of my build app with vb2010.Let me explain what the situation is at the moment.
I have a form and a splashscreen. I use the application events (startup event) to check if there is a network connection, if so the splashscreen will run and it will check if the database is available, if this is the case, it will copy the online database to the local ms access database.If the startup check of the network is false, it the user gets a message that there isn't any network available and the program will try to run normal, then when the user clicks the ok button of that message, it will check if the local database has any records. If so the splashscreen will run and the program starts normal (without copy the database, because there isn't any network available).The issue that I am having is, that when there isn't a network connection and the local database is empty, (I do get the message that the local database is empty), but the program still runs, while it should exit.Here is the code of the application event:
Protected Overrides Function OnInitialize(commandLineArgs As System.Collections.ObjectModel.ReadOnlyCollection(Of String)) As Boolean
Me.MinimumSplashScreenDisplayTime = 5000[code]......
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Feb 22, 2009
how to create an error message by message box to tell the user to enter a number only if they key in a character value?
I MEAN AFTER THEY PRESS THE CALCULATE BUTTON
Private Sub btnCalcFat_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalcFat.Click
Dim intFat As Integer
intFat = Integer.Parse(txtFat.Text)
lblResultDisplay.Text = txtFat.Text * 9
End Sub
My text box is call txtFat
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Aug 11, 2011
I am getting the error Parser Error Message: The server tag is not well formed. on the code line below:
<asp:HyperLink ID="imgFileType" ImageUrl="images/Icon_Pdf.gif" NavigateUrl='<%#"javascript:ViewFile('erg_", Eval("DocumentName") %>' runat="server"></asp:HyperLink>
I need the url link to be parsed as:
javascript:ViewFile('erg_Invoice_3200_QRG_Restaurant.pdf');
What am I missing in the syntax?
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