Multi Column List Box Array Resets Before Adding Next Values
Mar 13, 2010
When I implement this code, the first time the button is activated, the values are placed in the array, and displyed in the list box. However if the user then selects more days and times to add to the list box, and activates the button again, the previously added entries in the array are erased, and only the new entries are displayed. How can I prevent previous entries from being erased? If the user wants to add values, they need to be added to the existing values.[code]
I need to add data into a multi-column list, manually, in codes. I am using VB Express 2008. Could someone please hint me on how to do this with the following controls:
The ListBox or the ListView The Grid (I think it is the DataGridView)
Or anyother simple way of doing the stuff. All I want is simplicity.
i have retrived this datatable from datasource and i want to add a more colum 'category'basedon the each value of each Role, like if role column has the value '90 daya client' then in the same row it should have a value 'DC' in the category column.n make a temporatry dt1 table but to add related values.
S.No First Name Last Name Role Date 1 Us er1Name User1Name 90 Day Client 11/01/2011 2 User1NameAtt1 User1NameAtt1 90 Day Client 11/01/2011
I am trying to create a simple Word doc that when the user presses the button it takes the information in the boxes and tosses it into a template style paragraph. But my issue is that I have two combo list boxes as seen in the picture. I want to have two values in the drop down list as seen in the labels next to them but for the life of me I can't figure out how to do this in Word 2007. In Visual Studio this is much easier but I am work and need to snap this out for the folks at work. Is there an option that I can choose in the properties where I type in the values for each drop down or do I have to add them in at run time?
building simple program that i could print index pictures to 11x17 size paper. and came across with listbox multi items selected and wanted to add them to different picture boxes?
I have been reading books and the forums for a rew days now trying to work out how to use any control to carry out the following:Basically, I want to display a selection e.g "Club Name" in a combobox (or similar control) and have the ID of that selection in a separate hidden column e.g. "ClubID". This will allow me to easily reference and store the actual "ClubID" in the required record when I save it back to the database.I can not use the "SelectedIndex" property of the control as the combobox is populated from a 'sorted' stored procedure so the "SelectedIndex" does not match the actual index of the selection.
I have found lots of posts saying use the "ListView" control, but none of them actually show examples of how to bind the control to a data control to acheive what I need.What I am after is a turorial showing ADO code (because I want to hard code this to get a better understanding of how it all works) binding a multi-column control to a SQL database.
I've small project to do and now I'm stuck in middle. The program is to read the sequential text file and load it into a array/array of structure.The data information is like this (sample):
ID | Name | Type 1 | Cat | Animal 2 | Dog | Animal
[code]....
This is Just as sample data, my original data is more than this.I've open the DATA.txt file using FileStreamReader:
Dim FileStreamReader As StreamReader = New StreamREader(DATA.txt)
Read all the elements in the list and pass through ReadArrayString.Split the string using:
Where index 0 is the ID, index 1 is the name, and index 2 is the Type Then I load the types in the dropdown combobox menu from the array with out duplication. Like this:
If TypeComboBox.FindString(ReadArrayString(2)) < 0 Then TypeComboBox.Items.Add(ReadArrayString(2)) End If
Now When you click TypeComboBox it will show drop down menu with following list only.
Animal Bird Fish
After this, when Animal type is selected/clicked from combobox dropdown menu then it should only add the Id and Name of Animal type in the ListBox.Pseudocode may looks like this:
If Animal is selected/clicked from TypeComboBox then Add Cat into listbox Add Dog into listbox
[code]....
I've only figure out load items from only one column/array into combobox with out duplication.But can't figure out to compare the value of one column/array with another column/array and load it into listbox. I don't want to hardcode or write matching value inside the code. What I want is use the Array.
I want to add all the values of a certain column. I already get the value of an exact cell value but when i add the loop code for it to continue,it doesn't performs well.
I am trying to add values from Arraylist to particular column of grid view. As: If (Arr_NewContacts.Count > 0) Then dgvStayout.Rows.Clear() ' **GETTING ERROR HERE** dgvStayout.Rows.Insert(0, (Arr_NewContacts.Count - 1)) For i As Integer = 0 To Arr_NewContacts.Count - 1 dgvStayout.Rows(i).Cells("Name").Value = Arr_NewContacts(i).ToString [Code] ...... Datagrid property like AllowUserToAddRows and AllowUserToDeleteRows is already set to true.I am using above code on lost focus event of one of text box.
i have a datagridview and in one of the columns i m storing the amount on button click...i want to add the values of the amount at that time only i have done this but it is displaying 0 in the required textbox total += Form1.DataGridView1.Rows(counter - 1).Cells(6).Value
if you could possibly point me to the right direction, that would be great. i have tried researching about this but found no solution.i have a 2d array which holds student name and 3 grades (eng, maths, science.)student array (24,3)Now, i would like to use the data which is held within the array to create averages.I need a total class average for: maths column, eng column, and science. I also need an overall average for all subjects.the code i have used, so far, brings some odd results.
I am trying to run an event which will search through the different files in a given directory. The goal is to have it search for all files that begin with 'SP_', which are .sql files containing Stored Procedures. I would then like to add the full text of these Procedures to an array to be used later. This is causing an error when run, which I believe is because 'FullProcedureArray()', the string array I am trying to load does not have defined boundaries. When I declare it as 'FullProcedureArray(7)', or with some other value, it appears to run fine. But I don't want to have to hard-code a boundary for 'FullProcedureArray'; I would rather let it be defined by whatever the number of files in the folder is.
My question: Is there a way to declare 'FullProcedureArray' without having to give it an absolute value? I may just be missing something painfully obvious, but I haven't worked with this type of array much in the past.
Dim AppDataLocation As String = "C:FilesTestFiles" Dim ProcedureArray As String() Dim ProcedureText As String
I am creating an instance of a Generic List collection and I am surprised to find that I can't add more than one value to it at a time. I was thinking there was going to be something like what you can do with arrays, where you can add a group of values to it at creation. I saw the AddRange method, but that seems to add another collection to the end of this collection, which is not what I want. So my code is:
vb
Dim MyList as New List(Of String) MyList.Add("John") MyList.Add("Bob")
I have 1 list view box that has 2 colums. one for the product and the other for the cost. My question is how would I allow a user to add values to that?
My basic layout is, There is a settings window that has about 10 rows of text boxes and 2 colums. I want the user to be able to type in multiple items and prices then hit save and exit for the products to save to a my.setting and then use this my.setting to bring the users lists up in a list view box.
Since the product and the list price are paired I also need to keep them together in there pairs.
I'm adding multi-threading facilities for the first time. I have a function that is wrapped to be run in a separated thread. This function retrieves data (text) from a combobox and it works for sure without multi-threading.
When I call it as multi-threaded, I get the following error when I try to retrieve the data from the cmobobox: Cross-thread operation not valid: Control 'cmb1stBL' accessed from a thread other than the thread it was created on.
It looks like a restriction of thread-safety... I assume that the child thread cannot read from his parent, to make sure that he doesn't change his parent data. So how can I read the data from the combobox? Should I read the comoboxbox data before calling the child thread?
For a As Single = 1 To Picture1.Height - 1 If a < TempArray.Length Then ' Some Stuff here that i really would love not to share Else
[code]....
I get an error when i try to add the Array TempArray to the List of Boolean TruthBool... The Error Says QuoteObject reference not set to an instance of an object.The Variables are declared like this
Dim TruthBool As List(Of Boolean) Dim TempArray(10000) As Boolean
I know there are a couple of other problems with this code.. and i have solved most of them in my actual program.. I just cant get this error to go away...
I have my app that does some complicated function and adds some values to an array, but then later I need to access the strings, I have the index number but not the string so how can I find that string again?
I have a datagridview that is populated from an Oracle 11g DB. What I would like to do is add the values of a column together and display the results in a textbox. What would be the easiest way to do this?
On a client i have an anonymous list containing a multi-column primary key previously selected from the DB.Then i need to select all the records from the DB that equals the primary key list i have stored in the memory.[code]
I'm still learning VB.net and there is a bit of code I have added which is an array and I want to add a list of items to the array. If that makes sense. I have 6 classes two have arrays.
Here is the code from one of the classes Public Function getItems() As Array Return _LevelItems End Function
How would I add the item list to this? Where do I put it? Like underneath it or in the items class? That code is in the Level class.
Ok so I have an array and wish to add the variables of the array to separate lines of the list box. I came across this which in some ways worked but also didn't. The second thing mentioned on the page was to us:
ListBox1.DataSource = Form2.Title This works the first time you run it but if you try to run it again nothing happens. So using the above or something else how can I get it to update the list box? Another thing I tried was to use the DataSource method but instead to clear the list box first, but that turned up an error
I am trying to add the returned values from an array to the rows in a data table: Here is my current code the values load properly into the list box but not the table, each row ends up with the same value.
current code not working correctly Dim dtrow As DataRow Dim lat As Double = CDbl(34.213209)
I have a problem with a generic list, which consists of intances of a class i created. I am just amazed, each time I add a new object to the list, it overwrites the previous entries. Here is a code sample, i just can't beleive it. I am using visual studio 2010:
Dim translations As List(Of TranslatedValue) = New List(Of TranslatedValue) If Session("ctlTexts") Is Nothing Then Dim reader As IDataReader = DataAccessFunctions.db.GetDataReader("SELECT [ControlID], [ControlTextEN], [ControlTextDE], [ControlTextBG] FROM [dbo].[tbLanguage]", GetConnectionString)
I cannot figure out how to set an array to one of two sets of numbers (there will be more later), every way that I have tried throws some kind of error. I have tried to Dim the array inside the case statements, but then I cannot use the array in the For Each, which makes this worthless. [Code]
