I have a queue and i could copy it to an array. How can i save the contents of the array or even queue to Mysql database
Public waiting As New Queue(Of String)
wait.Enqueue(InputBox("enter patId..."))
dim waitArray(waiting.count-1) As String
waiting.copyTo(waitArray, 0)
I am currently going through Murachs Beginning vb.NET and have come across an problem with one of the exercises at the end of the chapter on collections. I basically have to update a simple Invoice application that was developed in an earlier chapter.It requires me to update the app such that everytime a new invoice object is created ( via pressing the new invoice button) this object is added to a queue. I am ok with this part.However I then have to edit the exit procedure so that the invoice objects are dequeued and displayed in a message box. This is where I am having my trouble. My code so far is shown below. This consists of the form.vb and the and the Invoice class.[code]I have also added a diagram of the format for the message displayed in the message box. I know I have to iterate through the queue but how can display the invoice customer name and invoice total?
View 4 Repliesfinding a solution on how to save a four level treeview on each table in the database? each level must be saved in the table w/c includes their parent-child relationship.
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I have been trying for days to work this code. I want to transfer the information from a listbox to a table in an access database. The listbox gets its information from a text file using stream reader. My code so far has produced an error at the NewRow Method. I am using VB.Net 2010
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I have an array that I'm basically treating like a queue (FIFO)I'm trying to decide the fastest way to implement this.Currently I'm just iterating through and shifting everything up an element and placing the new data @ 0. This was fine when I was dealing with 1000 element arrays, but now I'm moving up to 100k element arrays and it's stalling my code.It has been useful to have the data in array form because I'm using the array.sort method and a few other statistical modifications that use the element number (of the sorted list) to work.I'm not sure if VB lists are (like Java) pointer based, and if so I think that shifting pointers would execute faster than my current approach.My question is, if I did move to a list would it a) be faster, and b) is there a way to call a quick sort from the list class?If the execution time is the same for the array vs. list is there a better way to make a FIFO structure in VB?
View 2 Repliesi have an array of booleans whose current boolean values I want to preserve but add additional length to the array? How can I achieve that? My code looks like this:
Dim Array() As Boolean
Dim ArrayInterimShort() As Boolean
ReDim Array(119)
[code]....
I am trying to create a code where I placed sets of numbers in an array.I'll use a masktextbox to have the user enter the numbers to match what's in the array. If the user enters the number, ex: social, and the data is correct (matches the numbers in the array), something happens if the number entered in the masktextbox does not match any of the number sets in an array then another thing happens.The masktextbox so far only validates format and gets number only, however, I want the number entered to match whats in the array.
View 1 RepliesI'm a newbie in visual basic. We have a project in our school in implementing queue using circular array.
View 5 RepliesI am writting an application in VB using VS2008 and SQL2005. I would like to save an array to my database and later retreive it. I understand that I need to serialize the array to do this but don't understand the process. I have looked at various resources on the Internet but seem to be missing something.
View 2 RepliesI have a byte array of a file and I need to save it into my database in a field that has been set aside of type image.
However I have a problem my data access class takes a sql string and commits it to the database for example.
"EXECUTE stored proc @parm1, @parm2, @parm3"
However the problem is I cannot figure out how to transfer the byte array to string so that I can add it as an argument.
I hope this make sense.
I also understand that I can build parameters in com objects but I do not want to do this as it will disrupt my whole data access class and I am not prepared to do this at the moment.
I want to put all elements of a String array into a Queue(Of String). I have following code which using For...Each to put string into Queue(Of String):
Dim Files() As String = OpenFileDialog1.FileNames
'OpenFileDialog1 is an instance of OpenFileDialog control
Dim PendingFiles As New Queue(Of String)
[code]....
Is that possible to do it (i.e. put string array into Queue(Of String)) without using For...Each?
Is it possible to save listbox contents, on form_closing event, and reload them on the form_load event? If so, could you please show me how?
View 2 RepliesHow would I save the contents in the textbox so that next time the form containing the textbox is opened, it will still have the same text?
View 5 RepliesI want to save the listbox contents in to xyz.txt .How can i do this in VB? I want it to save automaticaly into C:xyz.txt .
View 1 RepliesI have a "For
Each
Row As
System.Data.DataRow
In
DataTable.Rows" type loop. I want to save the contents of a field to use in subsequent processing.
It looks to me like the proper way would be to use something like the following:
Dim saveCatalogWorkID As VariantType
For Each clsWTRow As System.Data.DataRow In clsWTDataTable.Rows
saveCatalogWorkID = clsWTRow.Field("CatalogWorkID")
Next clsWTRow
I have tried many methods to save my datagridview contents to a file but with no luck does anybody have a good method for xml to datagridview, datagridview to Xml,or any other methods to read/write a datagridview.
View 3 RepliesIve built a very small application for personal use only. Ive been working on it for around 2-3 weeks & have just finally completed it this morning.
Basically what I want to do is add a button to my form which will allow me to take the contents of the listbox and print it out or atleast be able to save it to a word document or something of that kind, I'm not entirely sure how I would go about doing this. Bare in mind, Ive only just stepped into VB around a month ago.. self learning myself via internet & several books I have at hand.
I have tried the internet and I got this [code]...
So Please help me I have spent 3 days on the internet searching and I have finally came here. I am using Visual Basic .NET 9 if you want to know.
How many linux users does it take to change a lightbulb?
I have a combo box, that i have linked to a text box, to save continious data. How would i save the contents of that combo box?
View 1 RepliesI've created a windows form in VB Express 2005 with lots of combo boxes and print and save buttons.I would like to be able to save the contents of the populated combo boxes, labels etc ie the whole form from the save button, preferably to excel 2003. However, would be just as happy to save it in the form format. The only code behind the save button I have so far is this, which just navigates me to the directory. When I enter a filename and extension, the directory is empty:
Private Sub save_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Save.Click
' Displays a SaveFileDialog so the user can save the file assigned to the Save button.
[code]....
How would I save the contents in a textbox? Right now I save a "Save" button, and heres the code
1.Text = My.Settings.1
2.Text = My.Settings.2
3.Text = My.Settings.3
[Code]...
I have used the XML serialization to save a single text and a picture in a XML file.However, I am confused on how to extend the concept further.I have a second Windows Form which has a TableLayoutPanel in which each cell has a Picture Box and a TextBox. The user has the option to set the number of rows and columns himself, so I do not know about the number of pictures that have to be saved in the XML file. Further, when the user pressed the load button, the same pictures have to come back to their original pictures boxes in the TableLayout.
How can I save the contents of the TableLayout in the XML file and retrieve them in their corresponding cells?
Am learning arrays at the moment and I have the below piece of code that goes through drive C: and displays the files in in a list box.
I want to try and expand it to use array.sort so that it gets the files, puts them into an array, and then I can sort by filename or file size. I have been rattling my brain over this - as to how do I put the files into an array.
Would like an explanation if possible as more interested in learning it rather than the answer.
Private Sub btnclick_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnclick.Click
Call Clearlist()
[Code]....
I have an application that pings IP addresses. When complete it will probably have close to 1000 IP addresses it will ping. I have a settings page that has a textbox that stores the IP address (one IP address eg. 192.158.1.1 per text box) for the object to ping. I want to be able to save all of the textbox IP address into a text file, and then be able to load the IP addresses from the text file into the respective text boxes.
View 3 RepliesI want to be able to save anything the user typed in the rich text box in my form into a .txt file in a location of their choosing after using the 'Save' option on the menu.[code]...
View 6 RepliesI am using the DataGridView in Visual Basic 2008 Express with an Access 2000 database.
What I'm trying to do is allow the user to click on the Row Header and capture the contents of the 4 cells in the row to 4 dfined variables. I know that I can capture each cell individually by using the CellContentClick event but this would require the user to click 4 times rather then just once.
I've created and populated a stringbuilder for a csv file. Normally I write it directly to the response object for the user to download through the browser.However, now I want to save it to a SQL DB image field. Is there a direct way to stream it in?
View 3 RepliesBasically I want to save the contents of my RTB (Rich text box) to a .txt document.
View 7 RepliesI've created a windows form with lots of combo boxes and print and save buttons.
I would like to be able to save the contents of the populated combo boxes, labels etc ie the whole form from the save button, preferably to excel 2003. However, would be just as happy to save it in the form format.
The only code behind the save button I have so far is this, which just navigates me to the directory. When I enter a filename and extension, the directory is empty:
Private Sub save_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Save.Click
' Displays a SaveFileDialog so the user can save the file assigned to the Save button.
[Code].....
I am getting an error that I can't track down.
Elsewhere in the project:
Public teamname (numteams) as string.
In this form as a form load event
For i = 1 to numteams
Listbox1.items.add (teamname(I))
next i
I get an error message to try new but I can't figure out what it means.