Printing Out Large And Complex HashTable?
Jan 25, 2012Is there a VB equivalent to PHP's print_r available? I have a very large and complex hashtable that I would like printed out.
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Encountered WebException When Printing A Large Number Of Batch Jobs
Mar 22, 2010We have a customer, who prints a large number of a batch job to a reporting service. When printing large batches of jobs, occasionally he would get a WebException from reporting services saying "The underlying connection was closed".What is the work around for this? Somebody added this portion in the code [code]It doesn't seem to fix the issue though. The customer still notices the Web Exception when she prints a large job to reporting service.
View 8 RepliesInterface And Graphics :: Printing ALL Content In Large PictureBox Which Has Scrollbars?
Feb 5, 2009My project needs to print a large PictureBox which during runtime only part of it is shown (as it's too large, width=4000 pixels and height= 2000 pixels) and to see the rest of the picturebox, user needs to scroll through the vertical and horizontal bars. On top of the picturebox, there are many controls which are loaded and positioned by user on run-time. Those include lines, labels, another picturebox
with image and user-defined controls. Now, i need to write a print function which will print that picturebox to not too many pages in A4 size or A3 size. Not too many means less than 5 for both paper size.
1) How can i print the whole picturebox with all its contents and go to next printing page until the whole PictureBox is printed? I tried using the following code but
(i)The image of picturebox inside that picture box and user-defined control are not printed whereas others are printed. Why is that so? How can i print the picturebox including both the "un-printed"?
(ii) Even i can print out the picturebox, only the part where the picturebox is shown is printed. How can i print the whole picturebox including those parts which needs scrolling to reach?
Private Sub CmdPrint_Click()
Dim rv As Long
'Picture1 is the picturebox to be printed.
[code]....
Large Multidimensial Array - Write A Program To Do Markov Chain But States Are Quite Large
Jun 9, 2011I want to write a program to do Markov chain, but my states are quite large. First of all I calculate all the transition probabilities and revenues for all states(1381860 total states), and store in a multidimensional array. Public RevArr(0 To 9, 0 To 750, 0 To 282) As Long
After that the iteration of markov chain should use these as inputs to calculate the steady-state probabilities. But when I try to run the main code I got this error.Exception of type 'System.OutOfMemoryException' was thrown.
The following is the declaration of second array I add just another dimension for storing all the iterations, but I get this error. Dim stateprob(IT + 1, 0 To 9, 0 To 750, 0 To 282) As single
Stop Printing And Paper Feeding In The Middle Of Printing In Dot Matrix Printer?
Jul 1, 2010I need stop printing and paper feeding in the middle of printing in dot matrix printer.(Like a POS Printer - When wrote 'End Doc' on POS printer can stop paper feeding)
View 4 RepliesGet A Hashtable Key Name From A Value?
Jul 20, 2010I have a hashtable in VB.NET and I need to get the string value of a key from it's value. For example, if I do: hashtable.add("string1","string2") How would I get the value "string1" if I had "string2"?
View 2 RepliesPut A Hashtable In Another Hashtable?
Jan 1, 2012Can you put a hashtable in another hashtable? I'm trying to make Tetris and to represent the grid of the gamefield I want to have an hashtable within another hashtable. The code is as followed
Public Tetrisfield As Hashtable
Public TetrisRow As Hashtable
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
[Code].....
Using A HashTable Key?
Feb 22, 2009I'm using a HashTable that stores information typed by the user in textboxes on a form. There are 4 textboxes on my form including, Name, Number, account representative, and total count of things added. Besides the text boxes there are 3 buttons on the form, one or adding a record, one for deleting one, and one for display the selected name from the listbox.
Everything pretty much works for me at this point, but I just have one question. When the record is input into the listbox it is supposed to display the users name he or se just entered in the name textbox. Now then, our professor wants us to use the number for the keyString for the HashTable.
That is the problem, if I use the number, instead of the name displaying in the listbox, the number displays. Is there a way to display the name in the listbox instead of the number? Once I have assigned the number as the keyString, am I stuck displaying that value only?
Printing On DotMatrix Printer (Ascii Printing) - Print Wont Come Right
Dec 6, 2010I am using VB 2008 & Access Databases for creating WinForm Applications. Also i am using Crystal Reports for Report solution. my question is How do i created reports such a way that they can be printed in faster Ascii Format on any DotMatrix printer. The default true type fonts make printing very slower.
I tried to use "Draft 10 cpi" font which come to available me after i installed a correct driver for my Epson printer. which also helped me overcome this problem. however it wont be the scenario with all my clients i.e. they might have different printers having different Make with different drivers installed. i have tried to open such project on there PC but the printing wont come in Draft instead the fonts get expanded too much & the print wont come right.
How To Serialize A Hashtable
Nov 2, 2009I have a hash table in which the key is of type Point and the value is of type PieceOfBoard. PieceOfBoard is derived from PictureBox. How do I serialize this hashtable to save it to a file?Do I need to add anything to the PieceOfBoard class?
View 3 RepliesC# - What Is The Generic Version Of A Hashtable
Apr 21, 2009I been learning basics of generics and it looks like it can really improve the performance of the application. But, I am not able to see the generic equivalent of Hashtable. share some sample C# code for creating generic hashtable classes. I need this for a demo.
View 5 RepliesCreate Hashtable With Values?
Oct 12, 2010Is it possible to create a hashtable "pre-populated" with values?[code]...
View 2 RepliesHashtable Key Not Recognised In Collection?
Jan 27, 2010I am using a hashtable to cache incoming UDP messages before my application processes them. After adding pairs to the hashtable, I am experiencing strange behaviour when interogating the collection, such that a containsKey() enquiry returns false, even though the key exists and is visible in the locals window. Spelling etc is correct, manually calling GetHashCode on the key (String) at each point (add() and containsKey()) is returning different values for the same key. To complicate things more, some keys are matched successfully.
View 2 RepliesShared Hashtable Between Different Apps?
Nov 3, 2010I currently have a ASP.NET Website and a Windows Service doing some work together.It consists in running some processes either using scheduling or on-demand requests.Basically before i had the windows service i used a Shared Hashtable to register all the on-demand requests and avoid duplicate requests for the same ID. I tought i could use the same hashtable to add the scheduled requests also... but somehow they are being created in separated hashtable's.I think its because the windows service uses a diferent instance of the website.
PS: in the hashtable i save full class objects for future reference so the solution must be able to achieve the same.
Using A Hashtable To Keep Track Of Forms?
May 9, 2011I was using the For Each frm as From In Application.OpenForms but it seemed a bit inefficient to loop thru every open form when I already knew what I was looking for. After some googling I found some information about hashtables so I used the following code. This code works as long as another form, say form3, isn't open with the same ID. What I am trying to figure out is, why is the hsh.contains only looking at the key instead of looking at the key/value pair?
Form1
Public hsh as New HashTable
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
[code].....
Printing An External File In Its Own Printing Routine
Apr 19, 2010I basically have an application that generates reports in a .html file, I use a .html file for the ease of making tables and formatting text.Now I would like to introduce a way of printing the reports from my program. Because I use a .html file, the formatting would not the correct if I was to print it directly from my application (as far as I know). For this reason, I would like to print it just like my web browser would have in order to keep the tabular data intact and the text formatting.
View 1 RepliesSchedule Printing And Check First If There Is Pending Job Before Printing?
Nov 2, 2009I'm creating an application which has an scheduler to print and it checks if there is a pending job on the print queue before it prints the next file. I use a timer which checks if there is any file to be printed on my database. Example, the timer ticks and selected 10 files to be printed, it should print the 10 files 1 at a time, if there's no print queue, that's the only time the next file should print. I think another timer is required which will keeps on checking if print queue is done. How will i do this?
View 2 Replies.net - Storing And Calculating Data Into Hashtable?
Dec 13, 2010I am making a small tool that require some calculation. I am using hashtable to store values that I need to calculate. This tool continuously extract data on specific time interval(30 seconds) from webpage and add those data into the hashtable. Now the problem is I need to store the previous extraction data and when new extraction occurs, I need to deduct the previous data from new data.
[Code]...
On first run it shows the result of Data3 = 100 which is currect. But on second run I need to redefine the value of Data2 = Data1 . So I need a result of Data3 = 0 on second run. This may not be the proper way to do this sort of operation. I have also tried using listbox, listview and even textfile to store the Data2 and recall that on second run. But could not make it possible.
This is the last phase of my tool and I am stuck with it.
C# - Get Closest/next Match In .NET Hashtable (or Other Structure)?
May 7, 2012I have a scenario at work where we have several different tables of data in a format similar to the following:
Table Name: HingeArms
Hght Part #1 Part #2
33 S-HG-088-00 S-HG-089-00
41 S-HG-084-00 S-HG-085-00
[code]....
Where the first column (and possibly more) contains numeric data sorted ascending and represents a range to determine the proper record of data to get (e.g. height <= 33 then Part 1 = S-HG-088-00, height <= 41 then Part 1 = S-HG-084-00, etc.)
I need to lookup and select the nearest match given a specified value. For example, given a height = 34.25, I need to get second record in the set above:
41 S-HG-084-00 S-HG-085-00
These tables are currently stored in a VB.NET Hashtable "cache" of data loaded from a CSV file, where the key for the Hashtable is a composite of the table name and one or more columns from the table that represent the "key" for the record. For example, for the above table, the Hashtable Add for the first record would be:
ht.Add("HingeArms,33","S-HG-088-00,S-HG-089-00")
This seems less than optimal and I have some flexibility to change the structure if necessary (the cache contains data from other tables where direct lookup is possible... these "range" tables just got dumped in because it was "easy"). I was looking for a "Next" method on a Hashtable/Dictionary to give me the closest matching record in the range, but that's obviously not available on the stock classes in VB.NET. what I'm looking for with a Hashtable or in a different structure? It needs to be performant as the lookup will get called often in different sections of code.
C# - Sorting Hashtable By Order In Which It Was Created
Nov 2, 2010This is similar to How to keep the order of elements in hashtable, except for .NET. Is there any Hashtable or Dictionary in .NET that allows you to access it's .Index property for the entry in the order in which it was added to the collection?
View 5 RepliesConvert Argument Function In Hashtable?
Jul 23, 2010I try to convert names and values parameters of function into a hashtable. For name of parameter, it's ok, but not for value.
Function test(ByVal param1 As String, ByVal param2 As String) As Hashtable
Dim hash As Hashtable = New Hashtable
Dim stFrame As New StackFrame
[Code]....
There is a property to get default value of parameter (if optional) with param.DefaultValue but how to get current value ?
Declaring Public Variables New Hashtable
Dec 8, 2009recently started converting our project from 1.1 to 2.0
It was fine with the following:
Public ghtAllAppMsgs As New Hashtable(300)
Now it is complaining to change to the following is this the right way:
Public ghtAllAppMsgs As New System.Collections.Hashtable(300)
This is under global.vb class file: here are the imports i already had in this file:
Imports Microsoft.Web.UI.WebControls
Imports Microsoft.Web.UI.WebControls.MultiPage
Imports System.Web
[Code]......
Multi-client / Server App That Needs To Use A Hashtable
Feb 16, 2010i have a multi-client/server app that needs to use a hashtable but i am getting an unexpected result because each timei call a sub from form1 the hashtable get recreated and erases all the data. [code]
View 12 RepliesStoring And Calculating Data Into Hashtable?
Dec 25, 2009I am making a small tool that require some calculation. I am using hashtable to store values that I need to calculate. This tool continuously extract data on specific time interval(30 seconds) from webpage and add those data into the hashtable. Now the problem is I need to store the previous extraction data and when new extraction occurs, I need to deduct the previous data from new data.Here is the process I am currently following:
Dim MyTable as New Hashtable
MyTable.Add("Data1","200")
MyTable.Add("Data2","100")
[code].....
Bind HashTable Keys To A ListBox In Program?
Jan 12, 2011I'm helping a friend port some code that I have written in Java to Visual Basic.NET. VB.NET is not my language of choose, so I am entirely new to it's quirks. How can I display keys from a HashTable in a ListBox?
View 2 RepliesConvert A String Of Key / Value Pairs To HashTable Or Dictionary Or?
Jun 19, 2010In VB.NET, how can I convert the following string into some kind of key/value type such as a Hashtable, Dictionary, etc?"Name=Fred;Birthday=19-June-1906;ID=12345".I want to extract Birthday or ID without having to split the string into an array.I'd prefer not to split the string into an array in case the format of the string changes later.I don't have control over the string.What if someone switches the order around or adds another element?
View 6 RepliesDictionary Or Hashtable And Iterating In Reverse Order?
Oct 18, 2010I need to place objects of various types in a "collection" and be able to:
1) Change the value of a property on any of the objects by using it's key.
2) Read the objects in the order they were placed in the "collection"
3) Read the objects in the reverse order they were placed in the "collection"
My findings so far:
1) Collection won't work because Item property is read only
2) It seems that Hashtable and dictionary won't work because I cannot iterate through them in reverse order.
3) Stack won't work for obvious reasons.
Is there a collection like data structure that has satisfies the requirements?
Hashtable - Get String Representation Of Object Reference
Jun 3, 2011I want to make a hashtable of object references and I want a different object's reference to be the key. How can I do this in vb.net? In java (assuming I am using the default toString method and that add() takes a string as a key and an object ref as the value) this would be something like: hashtable.add(obj1.toString(), obj2)
I do not want to use a vb.net gethashcode() function because I want deep clones of objects to have different identifiers. A related question is what is the default toString in vb.net? How can I get a string that represents an object reference in vb.net?
Hashtable Value Array (late Binding) Error?
Feb 26, 2011I have a hashtable that stores sports players: key = jersey number, value = an array of information...and what I am trying to do is put this information into combobox (but only showing a certain array elements), so for example say this was the information stored in the hashtable:
(key,{value})
"01",{"john smith","125lbs","qb"}
"02",{"john doe","205lbs","rb"}
so what I have done is created an arraylist that will store the items in the combobox.but my problem happends when I try to loop through the array from the hashtable values.
(playerlisting is the hashtable)
Dim playerlist As New ArrayList
[code]....
The above works, however since it's a foreach loop I cannot specify which array indexes I want to add onto the "listitem" string.
Dim arr As Array = CType(item.Value, Array)
For i = 0 To arr.Length - 1
listitem += arr(i) & " "
Next
But, when I try a simple forloop instead I get a "late binding" error with the 3rd line. Even when I cast the arr(i) as a string I get the error. What needs to be changed?
Import Hashtable's Fields In A Adodb Recordset?
Oct 26, 2010The field's names of hashtable are same of fields adodb.recordsetHow can i import the fields value of hashtable in fields adodb.recordset without do it manually?[code]....
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