This code is supposed to return all the records where the month component of the DateCreated is equal to the specified MonthIssued value. The problem is, if DateCreated is DBNull I will get a runtime exception which requires the extra If ternary operator. Any way around this / will this cause a performance hit the code is actually executed?
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I have a class that needs to check for errors in the data contained in a object.The routines that will check for errors could be implemented in concrete interfaces of supertype IErrorCheck. That way error checks can be discrete and added or removed from the class that requests the error checks.Each IErrorCheck implementation would be programmed against the supertype IErrorCheck (Strategy).But it would be nice not to recompile when checks are added or removed.Is there an accepted procedure for abstracting the error checks all the way out of the program, such as to read the checks from a file?
View 2 RepliesI would like to take blank secure stock paper and convert it in to a check.
I know you can get magnetic toner and print MICR.
The question is What is the actual font to use or should i get a package and send the data to it to print the check?
Has anybody done it successfully without having to resort to pre-printed checks.
Can not resolve this. Two radio buttons data binded inside a group box.
Click one thats not checked. Both un check. Must click again
Possible related situation here [URL]
writitng the my.settings manually.
Im hearing about this, can someone explain it to me or please show some basic code of Lambda with explanation.
View 2 RepliesIs it possible to shorten the following function to a lambda expression?Or (to do the trick by myself) what is the best and most understandable for beginners tutorial for lambda in vb.net?[code]
View 2 RepliesIn my ASP.Net Web-Application, I'm getting this error: Conversion from type 'DBNull' to type 'Boolean' is not valid.
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I need to check to see if a hot fix is installed on a windows box. from XP - Win7 there is a mix on the network and I am charged with making sure that they are up to date and have all patches.
I need it in a window app so that I can sort the IP's that have them and IP's that dont. and them am going to print the list out.the thing is I am not able to find how to pull the Hotfix'es off of Vista and Win7
I am looking for a Snipit to point me in the right direction.
Im confused on how to write a code on checking duplicates before insertion on vb.net. I know the sequence on how to do it but its kinda confusing when writing a code.
1.) Create a query that will check if the mobile number already exists on the database
2.) If not, insert the new data
3.) Else, a message will prompt that "You are already registered".
writing this in PHP is kinda easy for me but in vb.net.. , unfortunately, not easy.. Im still a beginner on vb.net.
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I am using a third party OPC library.I have a routine that basically checks that the connection to OPC is active and if not, waits 10 seconds and reinitializes by calling a .disconnect / .connect on the third party library's object.The OPC connection somewhere in its chain is using a com object that dislikes this behavior due to the object belonging to another thread.Ordinarily I would invoke a delegate to get the call back on the correct thread, however this base class does not implement ISSynchronizeInvoke.
Is there another way to make sure a a call to to an objects methods occur on the thread they were created on from within a system.timers.timer which is obviously running on another thread?Error message is: "The application called an interface that was Marshalled for a different thread. (RPC_E_WRONG_THREAD)"I know, kind of vague without a whole LOT of sample code, looking for pointers on where to even begin looking.
It has been a while and I got tired of it, what I am doing now is going to my accounting program to print out checks.Is there anyway I can print out checks on VB.NET?
View 6 RepliesI 'm searching for a tool which checks for files which is newly created or updated or deleted in specified location.
View 1 RepliesI have this code that checks if a thread or page has changed. But it always says it has changed. Because it does. Im currenlty checking the whole html page but i dont know a better way. Hers my code.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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I have a combobox named Requirements and The values of it come from sql
View 5 RepliesI have the following code: Basically, I have the textbox hidden until the user checks the checkbox, then, they can type the directory of which they want to open (crude approach I know, I'm just getting the feel for it)however with the code the way it is, no matter what I type in the text box, it brings in the same directory every time.. been messing with this for hours at wits end with it [code].....
View 13 RepliesI have a Check Box that the use checks to indicate that a specific situation is present. When the User checks the box he gets a Message Box reminding him that the condition must be fulfilled. This works fine and the database reflectthe fact that the Check Box is filled.
At a later date, if the user calls this record and fills the form, the Check Box is triggered and the message Box appears in the middle of the form fill operation.
Is there a way to prevent this from happening. I want the Check Box checked but don't want the message box if the change is triggered by the fill process.
I've been trying to create a function that checks if a number is a prime. according to [URL]..I have created a function although It doesn't work as expected.
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It sometimes returns true for composite numbers. oh and I know if you google it you get functions that do this, but most of them look inefficient so i'm trying to make my own.
I wanted to create a function that checks to see what button has been clicked on the windows form. For example If I had 10 generic buttons that open up different audio files. I would I create one Sub that can verify which button has been selected. I was either going to use a case statement or an if else. I did not want to create one sub for each button since it would be a lot of duplication in code.
View 2 RepliesI have a form with contains, among others, a TextBox called "wmi_cell_phone" and a RadioButtonList "wmi_send_sms". Basically, I need to create a validator that checks whether the value of the selected radio is "Y". If this is the case, then it checks if the TextBox value is empty or not. If it is empty, then it should notify the user to enter a value.
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I developed a class with a function which checks the availability of a certain url (standart=www.google.be)
Option Strict On
Option Explicit On
''' <summary>
''' Returns a value indicating your ability to connect to a certain server url
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which automated the system. Is it possible to implement this completely in a class? (meaning the class ++ the application events part)
I wanted to warn the user that a text box only accepts 2 characters that are only numbers. I have the maxlength property of the textbox set to 2. I also need the user to be able to BS to correct the entry, but the BS goes over the maxlength.
Private Sub txtBusDay_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtBusDay.KeyPress
If txtBusDay.TextLength = 2 Then
txtMonthNum.Text = ""
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I have 3 different validation groups on my web page, but when I click submit I want all of the groups to validate? It seems to me like the causesValidation="true" of the button will not validate the validators that are in their own validation group. So right now I am calling a javascript function that manually validates the groups.
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Now this works fine and dandy... But it seemed to me like before I had all the groups on the page the validators where much faster than how it has to validate them now. Is there something special i have to do to my button to get all of the groups to fire when it is clicked without the help of this javascript function?
Im currently making a tower defense game and im on my last bug for the game and i cannot get it solved. For some reason my For Loop to check if a shot hits a person is not working properly. Ill set it to "For Me.x = 1 To NumOfFaces 'Const for 5' and itll only check the first enemy and last enemy. Here is the code to check for if a shot hits an enemy, this runs on a timer through out the game.
Private Sub HitFace()
For Me.x = 1 To NumOfFaces
If Shot1Firing = True Or Shot2Firing = True Or Shot3Firing = True Or Shot4Firing = True Or Shot5Firing = True Or Shot6Firing = True Then[code].....
I have a listview with checkboxes on the left side and 2 columns of data. What I want to do is populate a listbox when the user checks a row in the listview. I've tried code in the Item_Check event. It does not pick up the item checked. It's as though it's behind. For example if my listview has a list of country codes and I check US, the code returns nothing but if I check another item, it picks up US. Same thing happens in the SelectedIndexChanged event. If I use a button, all works as expected.
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I understand the concept of regular expressions but I am looking for a regular expression string that checks the input string for the following criteria only...
1.) Upper and lower case letters
2.) The space character
3.) Apostrophe
4.) Comma
5.) Period
6.) Hyphen
I get an unexpexted Next error in my script and cannot figure out where it goes wrong. I've checked all End If's and cannot see that could be the problem. The script checks for Adobe versions and upgrade accordingly. If I comment out the 2 "deep" If's the error goes away.
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I would like to understand/know how i could have a splash screen which checks a database connection, makes a few calls to other servers and if the criteria meets it loads the default form (otherwise the app exits).
Currently im using the Load method of the splash screen which loads the default form when the criteria isnt met. I looked into the other events (i think under application) but cant get it to work as i require.
I have a datagridview with 3 checkboxes, Yes, No and InV.At runtime, I want the user when he checks one checkbox the other two are unchecked by default. Therefore, at whatever one time ONLY one checkbox will be checked.
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im trying to write a program that checks a website if a certain value is within a limit and if not enters a value into a text box and submits the information. I have researched into httpwebrequest however i cannot quite figure out how to progress from page to page. I also found that i can do browser manipulation however I don't a browser to be a open while the program is waiting for a specific value. So is there any way to do something like browser manipulation without the browser?
View 2 RepliesI'm creating a base class for a button that inherits from Control as opposed to ButtonBase.
I'm using reflector to look at ButtonBase to make sure I don't overlook anything important and I'm puzzled with the contents of the WndProc method. There's checks in there for things like button up, click and capture changed, which as far as I can tell are all handled within the relevent 'On' methods of the class.