Datagridviews - Sort The Scores By Greatest Value To Least Value
Mar 12, 2011
I have a datagridview with two columns; one named Names the other named Scores. This is my code so far Dim hScore As String() = New String() {strName, lblPercent.Text}
[Code]....
What I want it to do is sort the scores by greatest value to least value, but the problem I'm having is that the scores are stored as strings so they are being read and sorted from left to right. My question is, how do I store the scores in a numeric array and place them in the same row as the name, but in the second column? The names and scores only need to be stored as long as the program is running so I don't want to add anything to the registry or create new files to store them.
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May 24, 2011
Problem: I need to sort the numbers from biggest and smallest in a Text Document using VB console mode.
At the moment I've got this (not working):
Const Maxsize = 4
Sub Sort(ByRef TopScores() As TTopscores)
Dim count as Integer
[Code].....
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Nov 17, 2009
Ive got a question about finding the greatest value in a string. I am connected to a database but I am positive that part is right. So i posted here instead of there.
Dim x As Double
Dim ConnStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=DBASE.MDB"
[Code]...
How do I make my If..Then statement return the highest value of row 0's x? My output (by changing the if then statement) will either return the first or last entry in row 0. I hooked up my code to a list box and got all the data to list perfectly i just don't know how to get the highest number after i use the formula for x (which is {c1-c2}/c2).
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Sep 26, 2009
I have a project and I need to record long jumps. I have 5 numbers but how do I average the greatest 3 of 5, I know how to average all 5. Also am I supposed to put Val for strings or not because only 0 shows up for when I put something in name but if I put a number it will show up a number
[Code]...
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Apr 21, 2009
I am in a programming class, and am one of the best students in it, I even went to a state programming contest. One of the problems was to enter 6 race times in a Console Application and have it display the times back in order of which were fastest and their place such as
imput
11
15
12
[Code]....
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Apr 5, 2010
i have a database shown on VB 2008 showing music information. i am trying to show the track with the greatest number of sales however it is only displaying the current information on the screen (i am showing the access database in multiple text boxes) rather than searching the database.
this is the section of code i am struggling with:
Private Sub Btntopseller_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btntopseller.Click
Dim index, largest As Integer
[Code]....
i also would like to add to this, i would like the user to be able to select a year from a list box to show the track with the greatest number of sales in that year.
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Mar 24, 2011
1) Do you typically allow Deletions, Additions, and Edits in a DataGridView?
2) Have you found any simple way to use combos in a DataGridView? (See edit below.)
3) What type of binding do you typically use on a DataGridView? Do you manually code it? Bind it to an custom BindingSource object?
I'm accustomed to programming in MS Access and I'm now working on learning VB.NET. In Access I typically use updateable DataSheet view bound forms but this doesn't allow me to separate my business logic and create a Data Access Layer. Now I'm trying to figure out how to have an updateable DataGridView in .NET together with separate layers for Business Logic and Data Access. So far I haven't really been able to make sense out the many things I'm reading about this.
I need my DataGridViews to be easily sortable, filterable, and allow up to 10,000 records to be displayed at one time. I've achieved this using ADO.Net with standard DataTables (all written in code) but all my business logic and Data Access is in the code behind my form.
Edit:I guess I was under the impression that ComboBoxes are really difficult to use in DataGridViews so that's why I had posted question #2 above. I think I need to research this a little more as it's probably not as difficult as I thought it was but it doesn't appear to be anywhere as simple as a combo in MS Access. However, I realize that MS Access has many other limitations that VB.NET does not have.
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Dec 15, 2010
How can I improve this bit below to make the items in the TreeView to sort faster or something totally different to sort them easier?
[Code]...
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Jul 5, 2011
I have a MyObject; myObjects as List(Of MyObject) and a delegate Comparison(Of MyObject) that uses a lot of comparison functions (ByA, ByB, ByC etc) Ã la:
Shared Function CompareMyObjectsByName(x As MyObject, y As MyObject) As Integer
Return x.Name.CompareTo(y.Name)
End Function
[Code].....
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Dec 9, 2009
I am trying to get this code to count the scores which are the same and tell how many students had the same score. I can get it to add 1 to it but I can not get it to tell how many students had the same score.
Private Sub displayButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles displayButton.Click
Dim scores() As Integer = {88, 72, 99, 20, 66, 95, 99, 100, 72, 88, _
[code].....
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Apr 10, 2011
I want it to increment by 1.I have this code from net but I found hard to understand the first line :
If Decimal.TryParse(TextBox1.Text, userAnswer) Then
If answer = userAnswer Then
score += 1
TextBox2.Text = score
[code]....
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Apr 28, 2009
I am completely new to VB ( and frustrated) and I need help with my code below What I am telling VB to do is to get the number in the txtScore, store it in an array ( no clue how to do this)Sum of all scores goes to the txtTotal. Then I need vb to count how many are stored in the array after that get the average by accessing the txtTotal divide by the txtScoreCt and show it on my txtAverage.
Dim Scores(100) As Integer Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code]...
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Mar 14, 2011
I am trying today to write a code that enters all the scores I enter in a textbox(txtscore). I think I almost have it but it will not work properly for me. Her is the the sub I am using to list this code. the array is called arrScore.
Private Sub btnEnterScore_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEnterScore.Click
Dim score As Integer = 0 'counting
'check for valid input
[code]....
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Mar 21, 2011
I think I already know the answer to this, but I figured it would not hurt to ask.
Is there any possible way to nest Databound DataGridViews in .NET? What I would like to have happen is for each row in the DataGridView to have a button to expand, which would then give me a DataGridView underneath that. I would like this nested DataGridView to also be able to do this, so I could go n levels deep with them.
Is this possible with the .NET Winforms standard DataGridView? (Or another standard .NET control?) I have seen people reference some third party controls, however they are really expensive, and I don't really want to go that route.
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Sep 12, 2007
I want to copy a DataGridViewRow from DataGridView to another but when I try it I get this error:
InvalidOperationException: Row provided already belongs to a DataGridView control.
is there any other way to copy a DataGridViewRow ?
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Dec 5, 2011
I wrote a program using VB.NET. When I run the executable, it displays a DataGridView that may (or may not) have rows in it. The user can enter data, or hit an Update button to fetch data from a database. (The grid is NOT being used as a DataSource.)The user can also set the font with another button: DataGridView1.font = "..."
If the grid DOES have rows in it, everything works as expected and the font is used in the grid.If the grid does NOT have rows in it, the font does NOT change. Even after the user hits Update, or types in data.He has to entirely exit the program, and rerun it to see the font actually change.
Question: How do I set the font on the grid, regardless of whether it:
Has rows.
Doesn't have rows.
Will have rows later.
I would think DataGridView1.font would ALWAYS change the font. No?
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Jan 20, 2011
I have an idea, but i am not sure how to implement it with code.I have an application where a user can view current bookings for rooms.I have two datagridview controls, the first one shows the rooms and the second shows all my current bookings.What I want to be able to do or more the user, is click on a room and the current bookings for that room (datagridview1) to be shown in (datagridview2).What I think I need to do is apply a filter and a sort in a sub routine, then link my tables with a binding source.
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Mar 3, 2011
im searching the best way for Printing a whole form / Several Datagridviews and some Specific controll contents in my WindowsForm application.
I know the internet is full with bad and good examples. Its hard to separate the Good examples from the Bad examples.
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Jul 22, 2010
I have two relayed tables (teams and players) and two datagridviews. In the datagridview1 i have a combobox with datasource <teams>.In datagridview2 i have a combobox with datasource <players>. In this combo i can see all players. I want to filter and see only the players related to the team of the combo in the datagridview1.
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Aug 30, 2011
I have 2 forms (form1 and form2). I'm passing 2 numbers from form2 to form1 (see image/attachment). I want to make sure that 1 of those 2 numbers (passed from form2) aren't the same as any number on form1 in column2. For example, if I were to pass the numbers "2, and 3", the program should give an error saying, there is already 3 in column2. It doesn't matter if the first number (in column1) is the same, but the second number should NOT be a duplicate of any number in column2.
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May 23, 2010
I am novice at best with VB. I have a dataset built from a complex query. Well I have a lot more items in the dataset than I wish to show in a datagridview. Some items will be used for other purposes at the time, filling txt boxes, dropdowns, etc...all independent of the dgv. I am lost at how to fill just a 3 or 4 of the items rather than just filling the entire thing. So, instead of just filling the entire ds into the grid, how would I fill in selected columns into the datagrid that has specifically named columns at runtime?
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Dec 22, 2010
In my project,, I have three forms. In my main form, I have a DataTable filled with some data from a MySQL-server.In the two other forms, I have a DataGridView which is bound to a BindingSource, which again is bound to the same DataTable in the main form. So It looks something like this:
Datagridview Datagridview
| |
BindingSource BindingSource
[code].....
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Jan 5, 2009
I have 2 datagridviews on my form. One lists products and when you click on a product in the first datagridview the other lists tests for the selected product. I have a products table with a productid,productname and productcode. I have a tests table with a testid and a testname and I have a prodtests table with a prodtestid, productid, testid and a few other fields.
Public Class frmProducts
Dim myConstr As String
Private WithEvents ProductBindingSource As New BindingSource
Private WithEvents TestBindingSource As New BindingSource
Private Sub frmProducts_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code] .....
Also I need to add a combobox column to the second datagridview that is bound to my prodtests table and to list the testnames from the test table in a combobox. In my save button, should I just call both adapter.update methods to save all changes. I will add the appropriate update commands etc.
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Feb 16, 2012
VB 2010 form has 1 panel, 1 DGV in the panel, 1 TabControl with 3 tabs in the panel each tab has a DGV all 4 bound to the same DataSet through code.
I have a form that has multiple Datagridviews on it, 1 in the main portion of a panel and the other 3 in a tabcontrol. If I click on cell 0,4 of DGV1 cell 0,4 of DGV2 is also "hilighted" and the same goes in the reverse order. If I click on cell 1,4 in DGV 1, cell 0,1 is hilighted in DGV2 (basically it stays with the last selected col and what ever row for that DGV).
This isn't the functionality I'm really looking for here, when I single click or change cells on any of the DGV's I don't want any of the others doing anything.
As you can see there are 2 cells selected this was created by a single click in the 4th cell of Param0
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Oct 25, 2011
I have a problem with my DataGridViews, actually i have a form with a TabControl with 8 tabs, each tab have a DataGridView control. I'm populating them when the form load, the problem is that i got kind of a limit here, only 3 DataGridViews are getting populated, not 3 specific ones but any 3 i put first on my code. I'm populating them manually, doing a mysql query, filling a DataTable and then making the data source equal to the DataTable.
[Code]...
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Oct 26, 2011
I have a Form with a TabControl with 8 tabs, each tab have a Datagridview that needs to be populated each one from a different table of my database. I'd like to know if i need to make all the 8 connections and queries or i can apply the DRY principle and how i can do it.[code]...
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Jun 11, 2011
I use Visual Basis 2008 With MySQL. I Have one from with 6 (six) Datagridviews controls I Have the following problem: If i use Form1.Show method than the form1 is only show if data connections are made and all the datagridviews are filled with data What i want is to first show Form1 with alle the empty Datagridviews (6)controls and then After that i want that the program make the data connections and fill DataGridView with data. form1.show ' call form other Form
Private Sub Form1_Load(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles MyBase.Load 'in this Load event i make all the data connections en fill the datagridviews
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Mar 27, 2009
i have a datagridview on my winform that is bound on the click of a node in a tree this is the binding code...
Dim myDocList As IList(Of DocumentTemplate)
myDocList = CorrespondenceHelper.GetDocumentTemplateByCorrespondenceId(Convert.ToInt32(e.Node.Name.ToString()))
'add new blank row at bottom
myDocList.Add(New DocumentTemplate())
[code].....
i added a blank row in because if i bound without it then i was unable to add new row.
AllowUserToAddRows = True is set also
but when i populate the blank row and tab of it i would like another blank row to be created below but unsure where/how i go about this?basically im aiming for teh user to be able to edit or add numerous records to the datagridview then commit all changes on one click (Save) at the end.
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Jun 26, 2009
I discovered a problem in C# (boo hiss!!!) but it applies to VB.NET as well.I decided to build a little app to load info from some audio files using Taglib-sharp (nice little thing it is!) and create a Winamp playlist from the loaded files. (I know it's lame, don't laugh! I just wanted to learn some C#!)I have a form with 2 DataGridViews. I load the first dgv with some tag info from the selected files. I then move those files from 1 grid to the other, shuffling their positions along the way.The annoyance I found is during form design. If I try and name a column in the second DGV the same as in the first (eg. "Filename") I get an error that says the name is already in use by another component.To me this is not right. The column is part of a separate object, shouldn't this mean that "Filename" in object1 isn't the same as "Filename" in object2? I even have to refer to the specific object to get the column's value in a row. [code] to access the column's value in the first row of dgvMine or dgvOther, then why does the darn designer care if "Filename" exists in dgvMine and also in dgvOther? Shouldn't they be separate declarations "within" each of dgvMine and dgvOther?
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Mar 10, 2010
Heres my code:
Dim num1 As Integer
num1 = Val(InputBox("Subject Name:"))
[code].....
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